feat(release): add reproducible signed artifacts (#19)

.dockerignore

@@ -0,0 +1,13 @@
+.git
+.gitea
+.idea
+.vs
+.codex
+.agents
+**/bin
+**/obj
+TestResults
+deploy/compose/secrets
+deploy/compose/.smoke.env
+docs
+tests

.gitea/workflows/ci.yml

@@ -14,16 +14,34 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
 
       - name: Install .NET SDK
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@67a3573c9a986a3f9c594539f4ab511d57bb3ce9 # v4.3.1
         with:
           dotnet-version: 10.0.301
 
       - name: Restore locked dependencies
         run: dotnet restore Rendezvous.slnx --locked-mode
 
+      - name: Verify dependency licenses and reviewed transport pin
+        run: python3 eng/release_artifacts.py policy --root .
+
+      - name: Reject vulnerable direct or transitive packages
+        shell: bash
+        run: |
+          set -euo pipefail
+          dotnet package list --project Rendezvous.slnx \
+            --vulnerable --include-transitive --no-restore --format json \
+            >"${RUNNER_TEMP}/nuget-vulnerabilities.json"
+          python3 eng/release_artifacts.py audit \
+            --input "${RUNNER_TEMP}/nuget-vulnerabilities.json"
+
+      - name: Enforce compatibility version bumps
+        run: ./scripts/check-compatibility.sh origin/main
+
       - name: Verify formatting and analyzers
         run: dotnet format Rendezvous.slnx --verify-no-changes --no-restore
 
@@ -36,6 +54,9 @@ jobs:
       - name: Test
         run: dotnet test Rendezvous.slnx --configuration Release --no-build
 
+      - name: Run quick capacity and resilience gate
+        run: ./scripts/run-capacity-gate.sh
+
       - name: Test privileged Linux namespace topology when available
         shell: bash
         run: |
@@ -88,3 +109,63 @@ jobs:
           else
             echo "Network namespaces/NAT tooling unavailable; deterministic loopback topology remains the required gate."
           fi
+
+  container:
+    needs: quality
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Install .NET SDK
+        uses: actions/setup-dotnet@67a3573c9a986a3f9c594539f4ab511d57bb3ce9 # v4.3.1
+        with:
+          dotnet-version: 10.0.301
+
+      - name: Build deployment diagnostic
+        run: |
+          dotnet restore src/FinalFactory.Rendezvous.TestClient/FinalFactory.Rendezvous.TestClient.csproj --locked-mode
+          dotnet build src/FinalFactory.Rendezvous.TestClient/FinalFactory.Rendezvous.TestClient.csproj --configuration Release --no-restore
+
+      - name: Build and exercise hardened container
+        shell: bash
+        run: |
+          set -euo pipefail
+          compose_file="deploy/compose/compose.yaml"
+          secret="deploy/compose/secrets/signing-key"
+          cleanup() {
+            RENDEZVOUS_UID=1654 RENDEZVOUS_GID=1654 \
+              docker compose -f "$compose_file" down --volumes >/dev/null 2>&1 || true
+            rm -f "$secret"
+          }
+          trap cleanup EXIT
+          install -d -m 0700 deploy/compose/secrets
+          openssl rand -out "$secret" 32
+          chmod 0444 "$secret"
+          export RENDEZVOUS_UID=1654
+          export RENDEZVOUS_GID=1654
+          export SOURCE_REVISION_ID="$GITHUB_SHA"
+          docker compose -f "$compose_file" build \
+            --build-arg SOURCE_REVISION_ID="$SOURCE_REVISION_ID"
+          docker compose -f "$compose_file" up --no-build --detach
+          container_id="$(docker compose -f "$compose_file" ps -q rendezvous)"
+          test -n "$container_id"
+          test "$(docker inspect --format '{{.Config.User}}' "$container_id")" = "1654:1654"
+          test "$(docker inspect --format '{{.HostConfig.ReadonlyRootfs}}' "$container_id")" = "true"
+          test "$(docker inspect --format '{{range .Mounts}}{{if eq .Destination \"/app/appsettings.Production.json\"}}{{.RW}}{{end}}{{end}}' "$container_id")" = "false"
+          test "$(docker inspect --format '{{range .Mounts}}{{if eq .Destination \"/run/secrets/rendezvous-signing-key\"}}{{.RW}}{{end}}{{end}}' "$container_id")" = "false"
+          for attempt in {1..100}; do
+            if curl --fail --silent http://127.0.0.1:8080/health/ready >/dev/null 2>&1; then
+              break
+            fi
+            if (( attempt == 100 )); then
+              docker compose -f "$compose_file" logs rendezvous
+              exit 1
+            fi
+            sleep 0.1
+          done
+          ./scripts/smoke-deployment.sh
+          docker compose -f "$compose_file" stop --timeout 40 rendezvous
+          test "$(docker inspect --format '{{.State.Running}}' "$container_id")" = "false"
+          test "$(docker inspect --format '{{.State.ExitCode}}' "$container_id")" = "0"

.gitea/workflows/release.yml

@@ -0,0 +1,193 @@
+name: immutable-release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+concurrency:
+  group: release-${{ gitea.ref_name }}
+  cancel-in-progress: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    environment: production
+    steps:
+      - name: Check out immutable tag
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+
+      - name: Install pinned .NET SDK
+        uses: actions/setup-dotnet@67a3573c9a986a3f9c594539f4ab511d57bb3ce9 # v4.3.1
+        with:
+          dotnet-version: 10.0.301
+
+      - name: Install pinned Buildx and BuildKit
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        with:
+          version: v0.35.0
+          install: true
+          driver-opts: image=moby/buildkit:v0.25.2@sha256:0f63d66f8d2de0bd16438284831a3e9ee6ca7cd57b6eb3ed6e38a7a456590fa7
+
+      - name: Validate tag and produce reproducible artifacts
+        shell: bash
+        run: |
+          set -euo pipefail
+          version="${GITHUB_REF_NAME#v}"
+          ./scripts/check-release-tag.sh "$GITHUB_REF_NAME"
+          previous_tag="$(git tag --merged HEAD^ --list 'v*.*.*' --sort=-version:refname | sed -n '1p')"
+          if [[ -n "$previous_tag" ]]; then
+            ./scripts/check-compatibility.sh "$previous_tag"
+          elif [[ -n "$(git tag --list 'v*.*.*' | sed -n '1p')" ]]; then
+            echo "No prior release tag is an ancestor of $GITHUB_REF_NAME." >&2
+            exit 1
+          else
+            ./scripts/check-compatibility.sh __initial_release_without_base__
+          fi
+          release_builder="rendezvous-release-builder:${GITHUB_SHA}"
+          docker buildx build \
+            --platform linux/amd64 \
+            --file eng/release-builder.Dockerfile \
+            --target release-builder \
+            --load \
+            --tag "$release_builder" .
+          mkdir -p "${RUNNER_TEMP}/release-home" "${RUNNER_TEMP}/nuget"
+          docker run --rm \
+            --user "$(id -u):$(id -g)" \
+            --env HOME="${RUNNER_TEMP}/release-home" \
+            --env NUGET_PACKAGES="${RUNNER_TEMP}/nuget" \
+            --volume "$GITHUB_WORKSPACE:/source" \
+            --volume "${RUNNER_TEMP}:${RUNNER_TEMP}" \
+            --workdir /source \
+            "$release_builder" \
+            ./scripts/build-release.sh "$version" "${RUNNER_TEMP}/release/$version"
+          ./scripts/verify-real-consumers.sh "$version" "${RUNNER_TEMP}/release/$version"
+          echo "RENDEZVOUS_VERSION=$version" >>"$GITHUB_ENV"
+          echo "RENDEZVOUS_RELEASE_DIR=${RUNNER_TEMP}/release/$version" >>"$GITHUB_ENV"
+          echo "RENDEZVOUS_RELEASE_BUILDER=$release_builder" >>"$GITHUB_ENV"
+
+      - name: Build exact container candidate
+        shell: bash
+        run: |
+          set -euo pipefail
+          export SOURCE_DATE_EPOCH="$(git show -s --format=%ct HEAD)"
+          common=(
+            --no-cache
+            --pull=false
+            --provenance=false
+            --platform linux/amd64
+            --build-arg SOURCE_DATE_EPOCH="$SOURCE_DATE_EPOCH"
+            --build-arg SOURCE_REVISION_ID="$GITHUB_SHA"
+          )
+          release_tag="git.finalfactory.de/heikyu/rendezvous:${RENDEZVOUS_VERSION}"
+          image_one="${RUNNER_TEMP}/rendezvous-image-1.tar"
+          image_two="${RUNNER_TEMP}/rendezvous-image-2.tar"
+          docker buildx build "${common[@]}" --tag "$release_tag" \
+            --output "type=docker,dest=$image_one,rewrite-timestamp=true" .
+          docker buildx build "${common[@]}" --tag "$release_tag" \
+            --output "type=docker,dest=$image_two,rewrite-timestamp=true" .
+          cmp --silent "$image_one" "$image_two"
+          docker load --input "$image_one"
+          candidate_id="$(docker image inspect --format '{{.Id}}' "$release_tag")"
+          buildkit_version="$(docker buildx inspect --bootstrap | sed -n 's/.*BuildKit version: *//p' | sed -n '1p')"
+          docker run --rm \
+            --user "$(id -u):$(id -g)" \
+            --volume "$GITHUB_WORKSPACE:/source" \
+            --volume "${RUNNER_TEMP}:${RUNNER_TEMP}" \
+            --workdir /source \
+            "$RENDEZVOUS_RELEASE_BUILDER" \
+            python3 eng/release_artifacts.py record-container-build \
+              --provenance "$RENDEZVOUS_RELEASE_DIR/release-provenance.json" \
+              --buildx-version "$(docker buildx version)" \
+              --buildkit-version "$buildkit_version" \
+              --image-id "$candidate_id"
+
+      - name: Stage HTTP registration, browse, and authenticated UDP traversal
+        shell: bash
+        run: |
+          set -euo pipefail
+          secret="deploy/compose/secrets/signing-key"
+          cleanup() {
+            RENDEZVOUS_UID=1654 RENDEZVOUS_GID=1654 RENDEZVOUS_IMAGE="git.finalfactory.de/heikyu/rendezvous:${RENDEZVOUS_VERSION}" \
+              docker compose -f deploy/compose/compose.yaml down --volumes >/dev/null 2>&1 || true
+            rm -f "$secret"
+          }
+          trap cleanup EXIT
+          install -d -m 0700 deploy/compose/secrets
+          openssl rand -out "$secret" 32
+          chmod 0444 "$secret"
+          export RENDEZVOUS_UID=1654
+          export RENDEZVOUS_GID=1654
+          export RENDEZVOUS_IMAGE="git.finalfactory.de/heikyu/rendezvous:${RENDEZVOUS_VERSION}"
+          docker compose -f deploy/compose/compose.yaml up --detach --no-build
+          for attempt in {1..100}; do
+            curl --fail --silent http://127.0.0.1:8080/health/ready >/dev/null 2>&1 && break
+            if (( attempt == 100 )); then
+              docker compose -f deploy/compose/compose.yaml logs rendezvous
+              exit 1
+            fi
+            sleep 0.1
+          done
+          ./scripts/smoke-deployment.sh
+
+      - name: Scan candidate for high and critical vulnerabilities
+        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # v0.35.0, post-incident safe SHA
+        with:
+          image-ref: git.finalfactory.de/heikyu/rendezvous:${{ env.RENDEZVOUS_VERSION }}
+          version: v0.69.3
+          format: table
+          exit-code: "1"
+          ignore-unfixed: false
+          severity: HIGH,CRITICAL
+
+      - name: Generate container SPDX inventory
+        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # v0.35.0, post-incident safe SHA
+        with:
+          image-ref: git.finalfactory.de/heikyu/rendezvous:${{ env.RENDEZVOUS_VERSION }}
+          version: v0.69.3
+          format: spdx-json
+          output: ${{ env.RENDEZVOUS_RELEASE_DIR }}/FinalFactory.Rendezvous.Container.${{ env.RENDEZVOUS_VERSION }}.spdx.json
+
+      - name: Finalize checksums over the publish-ready candidate
+        shell: bash
+        run: |
+          set -euo pipefail
+          source_date_epoch="$(git show -s --format=%ct HEAD)"
+          docker run --rm \
+            --user "$(id -u):$(id -g)" \
+            --volume "$GITHUB_WORKSPACE:/source" \
+            --volume "${RUNNER_TEMP}:${RUNNER_TEMP}" \
+            --workdir /source \
+            "$RENDEZVOUS_RELEASE_BUILDER" \
+            bash -c 'python3 eng/release_artifacts.py normalize-container-sbom \
+              --file "$1/FinalFactory.Rendezvous.Container.$2.spdx.json" \
+              --version "$2" \
+              --commit "$3" \
+              --source-date-epoch "$4" \
+              && ./scripts/finalize-release-candidate.sh "$2" "$1"' \
+              _ "$RENDEZVOUS_RELEASE_DIR" "$RENDEZVOUS_VERSION" "$GITHUB_SHA" "$source_date_epoch"
+
+      - name: Preserve verified candidate artifacts
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        with:
+          name: rendezvous-${{ env.RENDEZVOUS_VERSION }}
+          path: ${{ env.RENDEZVOUS_RELEASE_DIR }}
+          if-no-files-found: error
+          retention-days: 30
+
+      - name: Install pinned signing client
+        uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2
+        with:
+          cosign-release: v3.0.6
+
+      - name: Publish once, sign, attest, and create release
+        shell: bash
+        env:
+          RENDEZVOUS_RELEASE_USERNAME: ${{ secrets.RELEASE_USERNAME }}
+          RENDEZVOUS_RELEASE_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+          COSIGN_PRIVATE_KEY: ${{ secrets.COSIGN_PRIVATE_KEY }}
+          COSIGN_PASSWORD: ${{ secrets.COSIGN_PASSWORD }}
+        run: ./scripts/publish-release.sh "$RENDEZVOUS_VERSION" "$RENDEZVOUS_RELEASE_DIR"

.gitignore

@@ -6,3 +6,9 @@ TestResults/
 *.suo
 *.user
 *.userosscache
+deploy/compose/.smoke.env
+artifacts/
+__pycache__/
+*.pyc
+deploy/compose/secrets/*
+!deploy/compose/secrets/.gitignore

CHANGELOG.md

@@ -0,0 +1,25 @@
+# Changelog
+
+All notable Rendezvous release changes are recorded here. Versions follow
+Semantic Versioning; HTTP, UDP, and connection-ticket format compatibility is
+tracked separately and called out for every release.
+
+## 1.0.0 - 2026-07-16
+
+### Compatibility
+
+- Initial Client and Contracts package major: 1.
+- HTTP contract: v1; UDP mediation contract: v1; connection-ticket format: v1.
+- Server accepts Client 1.0.0 through the latest compatible 1.x release.
+- Client traversal is pinned to LiteNetLib 2.1.4; LiteNetLib 1.x is unsupported.
+
+### Security and configuration
+
+- Packages contain no reusable credentials or environment configuration.
+- Production server startup requires provisioned signing keys and the hardened
+  single-active deployment configuration.
+
+### Migration
+
+- This is the first packaged release; no prior package or wire migration exists.
+- Consumers must pin both Rendezvous packages to the same exact version.

Directory.Build.props

@@ -1,4 +1,5 @@
 <Project>
+  <Import Project="eng/Versions.props" />
   <PropertyGroup>
     <AnalysisLevel>latest-recommended</AnalysisLevel>
     <ContinuousIntegrationBuild Condition="'$(CI)' == 'true'">true</ContinuousIntegrationBuild>
@@ -8,8 +9,35 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
+    <Version>$(RendezvousVersion)</Version>
+    <PackageVersion Condition="'$(PackageVersion)' == ''">$(RendezvousVersion)</PackageVersion>
+    <AssemblyVersion>$(RendezvousMajorVersion).0.0.0</AssemblyVersion>
+    <FileVersion>$(RendezvousMajorVersion).$(RendezvousMinorVersion).$(RendezvousPatchVersion).0</FileVersion>
+    <Authors>Final Factory</Authors>
+    <Company>Final Factory</Company>
+    <RepositoryUrl>https://git.finalfactory.de/HeiKyu/Rendezvous</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+    <PackageProjectUrl>https://git.finalfactory.de/HeiKyu/Rendezvous</PackageProjectUrl>
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <EnableSourceLink>true</EnableSourceLink>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+    <PackageReleaseNotes>See CHANGELOG.md in the package and repository.</PackageReleaseNotes>
     <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
     <RestoreLockedMode Condition="'$(CI)' == 'true'">true</RestoreLockedMode>
+    <NuGetAudit>true</NuGetAudit>
+    <NuGetAuditMode>all</NuGetAuditMode>
+    <NuGetAuditLevel>moderate</NuGetAuditLevel>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
+
+  <Target Name="ConfigureGiteaSourceLink"
+          BeforeTargets="_GenerateSourceLinkFile"
+          DependsOnTargets="InitializeSourceControlInformation">
+    <ItemGroup>
+      <SourceRoot Update="@(SourceRoot)"
+                  SourceLinkUrl="$(RepositoryUrl)/raw/commit/$(SourceRevisionId)/*" />
+    </ItemGroup>
+  </Target>
 </Project>

Directory.Packages.props

@@ -4,7 +4,7 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="LiteNetLib" Version="2.1.4" />
+    <PackageVersion Include="LiteNetLib" Version="[$(LiteNetLibVersion)]" />
     <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="10.0.9" />
     <PackageVersion Include="Microsoft.Extensions.ApiDescription.Server" Version="10.0.9" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />

Dockerfile

@@ -0,0 +1,35 @@
+# syntax=docker/dockerfile:1.7@sha256:a57df69d0ea827fb7266491f2813635de6f17269be881f696fbfdf2d83dda33e
+FROM mcr.microsoft.com/dotnet/sdk:10.0.301-noble@sha256:ea8bde36c11b6e7eec2656d0e59101d4462f6bd630730f2c8201ed0572b295d5 AS build
+ARG SOURCE_REVISION_ID
+
+WORKDIR /source
+COPY Directory.Build.props Directory.Packages.props NuGet.config global.json Rendezvous.slnx ./
+COPY eng/Versions.props eng/Versions.props
+COPY src/FinalFactory.Rendezvous.Contracts/FinalFactory.Rendezvous.Contracts.csproj src/FinalFactory.Rendezvous.Contracts/packages.lock.json src/FinalFactory.Rendezvous.Contracts/
+COPY src/FinalFactory.Rendezvous.Server/FinalFactory.Rendezvous.Server.csproj src/FinalFactory.Rendezvous.Server/packages.lock.json src/FinalFactory.Rendezvous.Server/
+RUN dotnet restore src/FinalFactory.Rendezvous.Server/FinalFactory.Rendezvous.Server.csproj --locked-mode
+
+COPY src/FinalFactory.Rendezvous.Contracts/ src/FinalFactory.Rendezvous.Contracts/
+COPY src/FinalFactory.Rendezvous.Server/ src/FinalFactory.Rendezvous.Server/
+RUN dotnet publish src/FinalFactory.Rendezvous.Server/FinalFactory.Rendezvous.Server.csproj \
+    --configuration Release \
+    --no-restore \
+    --output /out \
+    /p:UseAppHost=false \
+    /p:OpenApiGenerateDocuments=false \
+    /p:ContinuousIntegrationBuild=true \
+    /p:RepositoryCommit="$SOURCE_REVISION_ID" \
+    /p:SourceRevisionId="$SOURCE_REVISION_ID"
+
+FROM mcr.microsoft.com/dotnet/aspnet:10.0.9-noble-chiseled@sha256:f820c4fbfb8bb204c3bbe05c69d48cd039cd0e67aa8f13ac1cec168819b90643 AS runtime
+
+ENV ASPNETCORE_HTTP_PORTS=8080 \
+    DOTNET_EnableDiagnostics=0 \
+    DOTNET_CLI_TELEMETRY_OPTOUT=1 \
+    TMPDIR=/tmp
+WORKDIR /app
+COPY --from=build --chown=1654:1654 /out/ ./
+USER 1654:1654
+EXPOSE 8080/tcp
+EXPOSE 9050/udp
+ENTRYPOINT ["dotnet", "FinalFactory.Rendezvous.Server.dll"]

README.md

@@ -38,7 +38,11 @@ UDP hole punching cannot guarantee a direct connection through every network. Sy
 - `FinalFactory.Rendezvous.TestClient` — thin interactive and scriptable host/browser/join diagnostic built only on the public SDK.
 - `FinalFactory.Rendezvous.Tests` — unit, integration, security, and connection-lifecycle tests.
 
-The server directory and NAT mediator begin as separate modules in one deployable service because they share session, lease, authorization, and endpoint state. Their internal boundary should allow independent deployment later if scale, availability, or security requirements diverge.
+The server directory and NAT mediator are separate modules in one single-active
+deployable service because they share ephemeral session, lease, authorization,
+replay, and endpoint state. Their internal boundary can support a future
+explicitly designed shared-state architecture; operators must not create
+multiple active v1 replicas.
 
 ## Service boundaries
 
@@ -77,9 +81,11 @@ The initial service does not provide:
 
 Rendezvous is under active roadmap development. The versioned contracts,
 directory leases, authenticated join attempts, LiteNetLib mediator, caller-owned
-SDK coordination, typed connection outcomes, and thin public-SDK diagnostic client
+SDK coordination, typed connection outcomes, thin public-SDK diagnostic client,
-are implemented. Deployment hardening, the broader NAT-topology harness, and
+deterministic NAT topology harness, hostile-input controls,
-the production-readiness roadmap remain in progress;
+observability/operator surface, secure single-active Linux deployment, and
+numeric capacity/resilience gates, and reproducible signed release pipeline are
+implemented. Consumer pilots and final production-readiness gates remain in progress;
 participating games must not treat the current repository as a finished production
 service until those gates land.
 
@@ -94,6 +100,15 @@ defined in [hostile-input and overload protection](docs/security/abuse-protectio
 Health semantics, bounded telemetry, alerting, audit privacy, and the authenticated
 operator controls are defined in the
 [observability and operator runbook](docs/operations/observability-and-operator-runbook.md).
+The pinned non-root container, production topology, graceful drain, Linux
+hardening, smoke procedure, and recovery lifecycle are documented in
+[secure single-active Linux deployment](docs/deployment/linux.md).
+The numeric core-state candidate profile, public launch objectives, accelerated
+soak, resilience matrix, and single-active scaling decision are recorded in
+[capacity and resilience gates](docs/operations/capacity-and-resilience.md).
+Release versions, compatibility windows, immutable artifact construction,
+signing, staged promotion, rollback, and migration are defined in
+[releases and compatibility](docs/releases/README.md).
 The scriptable host/browser/join diagnostic and its stable automation contract are
 documented in the [TestClient integration guide](docs/integration/test-client.md).
 The always-on three-party scenarios, optional Linux namespace topology, and
@@ -117,8 +132,9 @@ Run the bootstrap server with
 the configured UDP mediator port; both stop through normal host cancellation.
 The launch profile uses separate ephemeral development-only publisher and operator
 signing keys. Production
-startup fails closed until externally supplied game policies and `env:` signing
+startup fails closed until its advertised endpoints, proxy trust boundary,
-key references resolve to valid key material; no reusable game secret is stored
+externally supplied game policies, and `env:` (base64) or `file:` (raw,
+absolute, non-symlink) signing-key references resolve safely; no reusable game secret is stored
 in this repository or the public Client package.
 The project dependency rules and supported runtime choices are documented in
 [project and dependency boundaries](docs/architecture/project-boundaries.md).

Rendezvous.slnx

@@ -6,6 +6,7 @@
     <Project Path="src/FinalFactory.Rendezvous.TestClient/FinalFactory.Rendezvous.TestClient.csproj" />
   </Folder>
   <Folder Name="/tests/">
+    <Project Path="tests/FinalFactory.Rendezvous.Capacity/FinalFactory.Rendezvous.Capacity.csproj" />
     <Project Path="tests/FinalFactory.Rendezvous.Tests/FinalFactory.Rendezvous.Tests.csproj" />
   </Folder>
 </Solution>

deploy/compose/appsettings.Production.json

@@ -0,0 +1,58 @@
+{
+  "AllowedHosts": "localhost;127.0.0.1",
+  "Rendezvous": {
+    "Deployment": {
+      "PublicHttpBaseUrl": "https://localhost/",
+      "PublicUdpHost": "127.0.0.1",
+      "PublicUdpPort": 9050,
+      "DrainDeadlineSeconds": 30,
+      "MinimumDrainSeconds": 1,
+      "SingleActiveInstance": true,
+      "AllowPrivatePublicEndpoints": true
+    },
+    "Udp": {
+      "ListenAddress": "0.0.0.0",
+      "Port": 9050
+    },
+    "AbuseProtection": {
+      "TrustedProxyAddresses": ["127.0.0.1"],
+      "OperatorAllowedAddresses": ["127.0.0.1"]
+    },
+    "Provisioning": {
+      "Issuer": "final-factory-rendezvous-smoke",
+      "Audience": "rendezvous-service",
+      "ClockSkewSeconds": 30,
+      "SigningKeys": [
+        {
+          "KeyId": "local-smoke-1",
+          "SecretReference": "file:/run/secrets/rendezvous-signing-key",
+          "CredentialKinds": ["DedicatedPublisher"],
+          "GameId": "space-game",
+          "EnvironmentId": "smoke",
+          "NotBefore": "2026-01-01T00:00:00Z",
+          "SignUntil": "2100-01-01T00:00:00Z",
+          "VerifyUntil": "2100-01-02T00:00:00Z"
+        }
+      ],
+      "Games": [
+        {
+          "GameId": "space-game",
+          "EnvironmentId": "smoke",
+          "Enabled": true,
+          "ProtocolVersions": [1],
+          "Regions": ["local"],
+          "VisibilityModes": ["Public"],
+          "PublisherTrustModes": ["ManagedDedicated"],
+          "MetadataValueMaxBytes": {},
+          "RequiredMetadataKeys": [],
+          "MetadataMaxBytes": 512,
+          "MetadataMaxKeys": 0,
+          "MaxListingsPerPrincipal": 10,
+          "MaxAnonymousListingsPerAddress": 0,
+          "MaxActiveJoinAttempts": 100,
+          "FallbackPolicy": "Disabled"
+        }
+      ]
+    }
+  }
+}

deploy/compose/compose.yaml

@@ -0,0 +1,35 @@
+name: rendezvous-local
+
+services:
+  rendezvous:
+    image: "${RENDEZVOUS_IMAGE:-finalfactory/rendezvous:local}"
+    build:
+      context: ../..
+      dockerfile: Dockerfile
+    init: true
+    user: "${RENDEZVOUS_UID:?set RENDEZVOUS_UID to a non-root host UID}:${RENDEZVOUS_GID:?set RENDEZVOUS_GID to its GID}"
+    read_only: true
+    tmpfs:
+      - /tmp:rw,noexec,nosuid,nodev,size=16m,uid=${RENDEZVOUS_UID},gid=${RENDEZVOUS_GID},mode=0700
+    cap_drop:
+      - ALL
+    security_opt:
+      - no-new-privileges:true
+    pids_limit: 128
+    mem_limit: 512m
+    cpus: 1.0
+    ulimits:
+      nofile:
+        soft: 4096
+        hard: 4096
+    stop_grace_period: 40s
+    restart: unless-stopped
+    environment:
+      ASPNETCORE_ENVIRONMENT: Production
+      ASPNETCORE_HTTP_PORTS: "8080"
+    volumes:
+      - ./appsettings.Production.json:/app/appsettings.Production.json:ro
+      - ./secrets/signing-key:/run/secrets/rendezvous-signing-key:ro
+    ports:
+      - "127.0.0.1:8080:8080/tcp"
+      - "9050:9050/udp"

deploy/compose/secrets/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

deploy/systemd/rendezvous.service

@@ -0,0 +1,48 @@
+[Unit]
+Description=Final Factory Rendezvous service
+Documentation=https://git.finalfactory.de/HeiKyu/Rendezvous
+After=network-online.target time-sync.target
+Wants=network-online.target time-sync.target
+
+[Service]
+Type=simple
+User=rendezvous
+Group=rendezvous
+WorkingDirectory=/opt/rendezvous
+ExecStart=/usr/bin/dotnet /opt/rendezvous/FinalFactory.Rendezvous.Server.dll
+Environment=ASPNETCORE_ENVIRONMENT=Production
+Environment=ASPNETCORE_HTTP_PORTS=8080
+Environment=DOTNET_EnableDiagnostics=0
+EnvironmentFile=-/etc/rendezvous/rendezvous.env
+Restart=on-failure
+RestartSec=5s
+KillSignal=SIGTERM
+KillMode=mixed
+TimeoutStopSec=40s
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateTmp=true
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHome=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectSystem=strict
+RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
+RestrictNamespaces=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+CapabilityBoundingSet=
+AmbientCapabilities=
+LockPersonality=true
+SystemCallArchitectures=native
+UMask=0077
+LimitNOFILE=4096
+CPUQuota=200%
+MemoryMax=2G
+TasksMax=128
+
+[Install]
+WantedBy=multi-user.target

docs/api/rendezvous-v1.json

@@ -2931,6 +2931,59 @@
           }
         }
       },
+      "OperatorCompatibilityResponse": {
+        "required": [
+          "serverVersion",
+          "minimumClientVersion",
+          "maximumClientMajorVersion",
+          "httpContractVersions",
+          "udpContractVersions",
+          "connectionTicketFormatVersions",
+          "liteNetLibMajorVersion",
+          "gameplayProtocolCompatibility"
+        ],
+        "type": "object",
+        "properties": {
+          "serverVersion": {
+            "type": "string"
+          },
+          "minimumClientVersion": {
+            "type": "string"
+          },
+          "maximumClientMajorVersion": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "httpContractVersions": {
+            "type": "array",
+            "items": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          "udpContractVersions": {
+            "type": "array",
+            "items": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          "connectionTicketFormatVersions": {
+            "type": "array",
+            "items": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          "liteNetLibMajorVersion": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "gameplayProtocolCompatibility": {
+            "type": "string"
+          }
+        }
+      },
       "OperatorReadinessResponse": {
         "required": [
           "httpListener",
@@ -3009,6 +3062,7 @@
       "OperatorStatusResponse": {
         "required": [
           "status",
+          "compatibility",
           "readiness",
           "store",
           "tenants",
@@ -3020,6 +3074,9 @@
           "status": {
             "type": "string"
           },
+          "compatibility": {
+            "$ref": "#/components/schemas/OperatorCompatibilityResponse"
+          },
           "readiness": {
             "$ref": "#/components/schemas/OperatorReadinessResponse"
           },

docs/architecture/0003-state-privacy-availability-and-budgets.md

@@ -129,9 +129,18 @@ until the owner records:
 - which games may enable anonymous unlisted player hosting;
 - deployment regions, data-processing jurisdiction, and approval of the stated
   30-day audit/13-month aggregate retention periods;
-- the per-game dedicated fallback endpoint policy;
+- the per-game dedicated fallback endpoint policy.
-- the measured supported profile and whether the 99.5% single-active objective
+
-  is sufficient or shared-state/high-availability work must be brought forward.
+Issue #18 measured and ratified the original 2-vCPU/2-GiB, 25,000-listing,
+10,000-attempt core-state candidate profile and retained the 99.5% single-active
+topology. It does not claim that core measurements prove public HTTP/UDP SLOs.
+The versioned evidence, RTO, failure domains, and explicit signals that trigger
+shared-state/high-availability work are recorded in the
+[capacity and resilience gate](../operations/capacity-and-resilience.md). The
+real-network canary in #23 must confirm that the proposed regional launch load
+fits this profile and validate the public SLOs; it may lower the launch cap but
+may not silently enable a
+second active instance.
 
 These are configuration and launch decisions, not permission to weaken the
 tenant, replay, endpoint-verification, or secret-handling controls.

docs/contracts/README.md

@@ -14,5 +14,7 @@ The public .NET types live in `FinalFactory.Rendezvous.Contracts`, target
 vectors and a public-API snapshot make accidental wire or source compatibility
 changes fail the normal test gate.
 
-Any incompatible change requires a new contract version. Additive JSON fields
+Readers ignore unknown JSON members, but the release gate deliberately treats
-may be introduced within v1 because v1 readers ignore unknown object members.
+any accepted OpenAPI or golden JSON surface drift as a contract-version change.
+That conservative policy makes additive and incompatible published changes
+equally visible to consumers instead of relying on an undocumented minor shape.

docs/deployment/linux.md

@@ -0,0 +1,228 @@
+# Secure single-active Linux deployment
+
+Tracking: #17
+
+Rendezvous v1 stores listings, observed endpoints, join attempts, replay markers,
+and runtime revocations only in the process that accepted them. Deploy exactly
+one active instance. A second live replica would have a different directory and
+replay boundary; `SingleActiveInstance=false` is therefore rejected rather than
+presented as high availability.
+
+## Pinned container
+
+The root `Dockerfile` uses a multi-stage .NET 10 build and pins both Microsoft
+base images by multi-architecture manifest digest. The runtime is the chiseled
+ASP.NET image, contains only the published server, runs as UID/GID 1654, exposes
+TCP 8080 and UDP 9050 explicitly, and does not require a writable application
+directory. Supply a small writable `/tmp` tmpfs because runtime libraries can
+legitimately need temporary space; keep the root filesystem read-only.
+
+From a clean checkout:
+
+```bash
+docker build --pull=false --tag finalfactory/rendezvous:local .
+docker inspect --format '{{.Config.User}}' finalfactory/rendezvous:local
+```
+
+The reported user must be `1654:1654`. Digest pins make a rebuild reproducible;
+updating .NET is an explicit reviewed change to the tag, digest, SDK pin, and
+lock files together. Do not replace the digest with `latest` in production.
+
+The local Compose example applies a read-only root, non-root user, no Linux
+capabilities, `no-new-privileges`, bounded PIDs/files/memory/CPU, and a shutdown
+grace period longer than the service drain deadline:
+
+```bash
+install -d -m 0700 deploy/compose/secrets
+umask 077
+openssl rand -out deploy/compose/secrets/signing-key 32
+export RENDEZVOUS_UID="$(id -u)"
+export RENDEZVOUS_GID="$(id -g)"
+test "$RENDEZVOUS_UID" -ne 0
+docker compose -f deploy/compose/compose.yaml up --build --detach
+```
+
+`deploy/compose/appsettings.Production.json` is an isolated loopback smoke
+profile, not an Internet template: it deliberately opts into private advertised
+endpoints and has no TLS proxy. Its random key is ignored by Git and must be
+deleted after use. Its deliberately long key window only keeps this disposable
+local fixture usable; production keys require short, reviewed rotation windows.
+Production configuration must use its real public names and must leave
+`AllowPrivatePublicEndpoints` false.
+
+## Production topology
+
+Use one active service behind a source-preserving edge:
+
+```text
+clients -- HTTPS/443 --> TLS reverse proxy -- HTTP/8080 --> Rendezvous
+clients -- UDP/9050 -------------------------------------> Rendezvous
+```
+
+- Give the HTTPS origin and UDP endpoint stable DNS names. Set
+  `PublicHttpBaseUrl` to the exact external HTTPS origin and `PublicUdpHost` /
+  `PublicUdpPort` to the endpoint given to game clients.
+- Terminate TLS 1.2 or newer at a maintained reverse proxy. Bind internal HTTP
+  only to the private proxy network. Restrict `AllowedHosts` to the public HTTP
+  host; wildcard host filtering is rejected.
+- Put only the proxy's exact literal addresses in
+  `Rendezvous:AbuseProtection:TrustedProxyAddresses`. Rendezvous ignores
+  forwarded headers from every other source. Keep the last proxy from replacing
+  the original client address and prevent direct access to TCP 8080.
+- Forward UDP as UDP, without an HTTP proxy. NAT, load balancer, firewall, and
+  return routing must preserve the client's source IP/port and must send replies
+  from the same advertised IP/port. Many HTTP load balancers, Kubernetes ingress
+  controllers, rootless container port proxies, anycast products, and generic
+  L7 services cannot guarantee this. Do not deploy through one unless an actual
+  host/join smoke proves both observed source and reply path. A load balancer
+  must have exactly one healthy Rendezvous target.
+- Permit inbound TCP 443 to the TLS proxy and UDP 9050 to Rendezvous. Permit the
+  proxy to reach TCP 8080. Permit DNS, time synchronization, image/telemetry
+  destinations as required by local policy, and UDP replies to client endpoints.
+  Deny public TCP 8080 and every unused inbound port.
+
+Readiness is the load-balancer gate; liveness is only a process-health signal.
+Remove a draining instance from new traffic when `/health/ready` becomes 503.
+Do not use liveness failure to start a second active process while the old one
+still owns the public UDP address.
+
+## Required production configuration
+
+Production startup validates all of these before binding listeners:
+
+- an absolute path-free HTTPS `PublicHttpBaseUrl`;
+- an unambiguous public `PublicUdpHost` and port;
+- `SingleActiveInstance=true`, an explicit non-wildcard `AllowedHosts`, and at
+  least one exact trusted TLS-proxy address;
+- a 1-30 second drain deadline whose minimum observation interval is shorter;
+- at least one enabled game policy and an active scoped signing key.
+
+Missing values produce an actionable startup error. The checked-in base file is
+intentionally unsafe for Production so an accidental bare launch fails closed.
+
+Signing keys support two external references:
+
+- `env:NAME` reads 1-4096 bytes encoded as base64 from `NAME`;
+- `file:/absolute/path` reads 1-4096 raw bytes from a non-symlink file.
+
+Prefer a read-only container secret owned by the configured container identity.
+For systemd, use a root-owned, `rendezvous`-group-owned `0440` file (or an
+equivalent narrow ACL) so the non-root process can read but not replace it. A
+signing key must contain at least 32 random bytes. Never put the key, publisher/operator
+credential, or secret value in JSON, a command argument, an image layer, Compose
+environment, logs, metrics, or source control. Configuration contains only the
+reference and non-secret lifecycle metadata. A vault/KMS adapter can replace the
+provider where local policy requires it.
+
+Keep the host clock synchronized with authenticated NTP. Credential and key
+windows use wall time; lease, timeout, drain, and rate-limit deadlines use a
+monotonic clock. Alert on clock synchronization loss before rotating keys.
+
+The checked-in Compose limits (one CPU and 512 MiB) are for its isolated smoke
+profile, not a production capacity claim. The measured core-state candidate
+uses 2 vCPU and 2 GiB with the same 128-PID/4096-descriptor ceilings; see
+the [capacity and resilience gate](../operations/capacity-and-resilience.md).
+Measure real traffic, then change resource limits and server budgets together.
+Memory pressure or CPU throttling must not extend orchestrator termination past
+`DrainDeadlineSeconds` plus five seconds.
+
+## Graceful shutdown
+
+SIGTERM and the authenticated operator drain both stop new registrations and
+join attempts immediately. On process shutdown, HTTP and UDP remain available
+long enough for existing join attempts to finish. The service exits as soon as
+the minimum drain interval has elapsed and no attempts remain, or forcibly
+clears all ephemeral state at the configured deadline. It then stops UDP and
+HTTP listeners and exits. Configure Docker/systemd/Kubernetes termination grace
+strictly longer than the service deadline; the examples use 40 seconds for a
+30-second drain.
+
+Never use SIGKILL for a normal rollout. After stopping, verify the process is
+gone and neither `8080/tcp` nor `9050/udp` is bound before starting its
+replacement on the same host. A crashed or force-killed process cannot drain;
+clients recover through bounded retries and hosts re-register.
+
+## systemd alternative
+
+Publish the server for Linux, install the immutable output at `/opt/rendezvous`,
+place production configuration beside the application read-only, place key
+files below `/etc/rendezvous`, and install `deploy/systemd/rendezvous.service`:
+
+```bash
+dotnet publish src/FinalFactory.Rendezvous.Server \
+  --configuration Release --runtime linux-x64 --self-contained false \
+  --output publish/rendezvous
+systemd-analyze verify deploy/systemd/rendezvous.service
+sudo systemctl daemon-reload
+sudo systemctl enable --now rendezvous.service
+```
+
+Create the dedicated `rendezvous` user without a login shell. Keep
+`/opt/rendezvous` and `/etc/rendezvous` root-owned and non-writable by that user;
+install each required key with `root:rendezvous` ownership and mode `0440`. The
+unit applies the measured 2-vCPU/2-GiB core-state candidate profile plus the
+same filesystem, privilege, network-family, and shutdown hardening as Compose.
+
+## HTTP and UDP smoke
+
+Build the diagnostic once, then exercise the actual published HTTP and UDP
+paths. The test creates a public listing, sends authenticated presence and punch
+traffic through UDP 9050, establishes peer-to-peer traffic, reports the outcome,
+and deregisters cleanly:
+
+```bash
+dotnet build src/FinalFactory.Rendezvous.TestClient --configuration Release
+./scripts/smoke-deployment.sh
+```
+
+For the local Compose profile, the script derives a ten-minute diagnostic
+publisher credential from the ignored local key without printing either secret.
+For production, do not copy the signing key to the smoke host. Instead inject a
+short-lived, region-scoped credential through
+`RENDEZVOUS_PUBLISHER_CREDENTIAL`, and set the external endpoints:
+
+```bash
+export RENDEZVOUS_PUBLISHER_CREDENTIAL='<short-lived deployment credential>'
+export RENDEZVOUS_SMOKE_HTTP_URL='https://rendezvous.your-company.tld/'
+export RENDEZVOUS_SMOKE_UDP_ENDPOINT='rendezvous-udp.your-company.tld:9050'
+export RENDEZVOUS_SMOKE_GAME_ID='<credential game ID>'
+export RENDEZVOUS_SMOKE_ENVIRONMENT_ID='<credential environment ID>'
+export RENDEZVOUS_SMOKE_REGION='<credential region>'
+export RENDEZVOUS_SMOKE_PROTOCOL_VERSION='<enabled protocol version>'
+./scripts/smoke-deployment.sh
+```
+
+Those four scope values must match both the short-lived credential and an
+enabled server policy. The defaults (`space-game`, `smoke`, `local`, protocol
+`1`) are only for the checked-in local Compose profile.
+
+The smoke fails unless both health endpoints and the complete authenticated UDP
+mediation/direct-traffic flow succeed. It does not prove every consumer NAT;
+run the topology harness and representative external-network tests as well.
+
+## Restart, upgrade, rollback, and backup
+
+Rendezvous has no durable runtime database. Restarting intentionally loses all
+listings, observed endpoints, attempts, replay markers, and runtime-only
+revocations. Hosts must treat registration as a renewable lease and re-register
+after service recovery. Clients must re-browse and start a new bounded attempt.
+
+Back up only reviewed configuration, policy, secret references, key material and
+its custody/lifecycle records, deployment manifests, and image digest. Never
+claim a backup contains live sessions or endpoints. Restore keys only through the
+secret system, not into the image or repository.
+
+For an upgrade:
+
+1. Build and test the new pinned digest; validate configuration without starting
+   a second active instance.
+2. Drain and stop the current process, verify both sockets are released, then
+   start the replacement on the same public endpoints.
+3. Require live/readiness and HTTP+UDP smoke success; monitor host
+   re-registration, error rate, and direct-connect outcomes.
+
+For rollback, repeat the same stop-before-start sequence with the previously
+recorded image digest and compatible configuration/key set. Never run old and
+new versions concurrently to avoid split ephemeral state. If a wire-incompatible
+change ever becomes necessary, use a new API/protocol version rather than a
+rolling two-version replica set.

docs/evidence/capacity/v2/candidate-2cpu.json

@@ -0,0 +1,148 @@
+{
+  "schemaVersion": 2,
+  "evidenceVersion": "v2",
+  "generatedAt": "2026-07-16T14:10:53.6981858+00:00",
+  "profile": "candidate",
+  "runtime": {
+    "framework": ".NET 10.0.9",
+    "operatingSystem": "CachyOS",
+    "kernel": "Unix 7.1.3.2",
+    "architecture": "X64",
+    "cpuModel": "AMD Ryzen 7 9800X3D 8-Core Processor",
+    "processorCount": 2,
+    "cpuAffinity": "0,1",
+    "cpuQuota": "not-enforced",
+    "memoryLimit": "not-enforced",
+    "garbageCollector": "workstation",
+    "commitSha": "cf14836d48b0b4aaa67f99433f4fba3585bcd2bb",
+    "treeState": "clean",
+    "command": "RENDEZVOUS_CAPACITY_PROFILE=candidate RENDEZVOUS_CAPACITY_CPUSET=0,1 ./scripts/run-capacity-gate.sh",
+    "imageDigest": "not-containerized",
+    "workloadSeed": "fixed-sequences-random-identifiers",
+    "capacityPhaseAverageCpuPercent": 56.37724115383554,
+    "peakWorkingSetBytes": 169705472,
+    "managedBytesAfterCleanup": 35615200
+  },
+  "targets": {
+    "visibleListings": 25000,
+    "activeJoinAttempts": 10000,
+    "coreControlOperationsPerSecond": 200,
+    "coreMediationOperationsPerSecond": 2000,
+    "coreControlP95Milliseconds": 200,
+    "coreMediationP95Milliseconds": 100,
+    "maximumAverageCpuPercent": 70,
+    "maximumWorkingSetBytes": 1610612736,
+    "soakCycles": 1000,
+    "soakDurationSeconds": 300
+  },
+  "measurements": [
+    {
+      "operation": "registration-and-presence",
+      "samples": 1000,
+      "p50Milliseconds": 0.003,
+      "p95Milliseconds": 0.0046,
+      "p99Milliseconds": 0.0054,
+      "operationsPerSecond": 282453.96000451926,
+      "minimumOperationsPerSecond": 200,
+      "budgetMilliseconds": 200,
+      "passed": true
+    },
+    {
+      "operation": "lease-renewal",
+      "samples": 1000,
+      "p50Milliseconds": 0.0004,
+      "p95Milliseconds": 0.0009,
+      "p99Milliseconds": 0.0021,
+      "operationsPerSecond": 968992.2480620155,
+      "minimumOperationsPerSecond": 200,
+      "budgetMilliseconds": 200,
+      "passed": true
+    },
+    {
+      "operation": "visible-session-browse",
+      "samples": 250,
+      "p50Milliseconds": 0.9046,
+      "p95Milliseconds": 3.3704,
+      "p99Milliseconds": 3.9471,
+      "operationsPerSecond": 695.5799787597697,
+      "minimumOperationsPerSecond": 200,
+      "budgetMilliseconds": 200,
+      "passed": true
+    },
+    {
+      "operation": "join-attempt-issuance",
+      "samples": 1000,
+      "p50Milliseconds": 0.0029,
+      "p95Milliseconds": 0.0045,
+      "p99Milliseconds": 0.0055,
+      "operationsPerSecond": 296428.042092782,
+      "minimumOperationsPerSecond": 200,
+      "budgetMilliseconds": 200,
+      "passed": true
+    },
+    {
+      "operation": "simultaneous-punch-pairing",
+      "samples": 1000,
+      "p50Milliseconds": 0.0043,
+      "p95Milliseconds": 0.0073,
+      "p99Milliseconds": 0.0115,
+      "operationsPerSecond": 109212.03516627532,
+      "minimumOperationsPerSecond": 2000,
+      "budgetMilliseconds": 100,
+      "passed": true
+    },
+    {
+      "operation": "principal-revocation",
+      "samples": 50,
+      "p50Milliseconds": 0.518,
+      "p95Milliseconds": 0.7049,
+      "p99Milliseconds": 11.8557,
+      "operationsPerSecond": 1320.1773262184577,
+      "minimumOperationsPerSecond": 50,
+      "budgetMilliseconds": 200,
+      "passed": true
+    },
+    {
+      "operation": "telemetry-recording",
+      "samples": 1000,
+      "p50Milliseconds": 0.0001,
+      "p95Milliseconds": 0.0001,
+      "p99Milliseconds": 0.0001,
+      "operationsPerSecond": 1438641.9220256077,
+      "minimumOperationsPerSecond": 10000,
+      "budgetMilliseconds": 1,
+      "passed": true
+    },
+    {
+      "operation": "coincident-listing-attempt-expiry",
+      "samples": 1,
+      "p50Milliseconds": 29.6882,
+      "p95Milliseconds": 29.6882,
+      "p99Milliseconds": 29.6882,
+      "operationsPerSecond": 33.682962483916384,
+      "minimumOperationsPerSecond": 0,
+      "budgetMilliseconds": 200,
+      "passed": true
+    }
+  ],
+  "state": {
+    "peakListings": 25000,
+    "peakAttempts": 10000,
+    "peakReplayMarkers": 0,
+    "finalListings": 0,
+    "finalAttempts": 0,
+    "finalReplayMarkers": 0,
+    "expiryChurn": 94906,
+    "maintenanceSweeps": 36307,
+    "soakCyclesCompleted": 75126848,
+    "soakDurationSeconds": 300.0000015,
+    "soakPeakScheduledExpiryEntries": 7,
+    "soakManagedGrowthBytes": -257288,
+    "soakHandleGrowth": 2,
+    "restartStartedEmpty": true,
+    "overloadWasTyped": true,
+    "recoverySucceeded": true
+  },
+  "failures": [],
+  "passed": true
+}

docs/operations/capacity-and-resilience.md

@@ -0,0 +1,189 @@
+# Capacity, resilience, and availability gate
+
+Tracking: #18
+
+This gate turns the v1 budgets in ADR 0003 into a repeatable release decision.
+It does not turn Rendezvous into a horizontally scalable service: v1 remains one
+active process with bounded in-memory state. A second process may be a cold
+standby, but it must not accept traffic until the first process has stopped and
+released the public HTTP and UDP endpoints.
+
+## Launch envelope and approved core-state profile
+
+The approved core-state profile is one Linux process limited to 2 vCPU and
+2 GiB RAM. Public HTTP/UDP numbers are launch objectives that require the #23
+real-network canary before they become a supported service claim:
+
+| Dimension | Value | Evidence status |
+| --- | --- | --- |
+| Visible listings | 25,000 | Enforced and measured here |
+| Active join attempts | 10,000 | Enforced and measured here |
+| Core control path | 200 operations/second; p95 at most 200 ms | Measured here |
+| Core mediation path | 2,000 pairings/second; p95 at most 100 ms | Measured here |
+| Sustained HTTP demand | 200 requests/second | #23 launch objective; not yet a supported claim |
+| Sustained UDP demand | 2,000 datagrams/second | #23 launch objective; not yet a supported claim |
+| Public HTTP/UDP latency | p95 at most 200 ms / 100 ms | #23 launch objective; not yet a supported claim |
+| Capacity-phase average CPU / peak working memory | below 70% / below 1.5 GiB | Measured for the core candidate |
+| Valid in-profile monthly availability | 99.5%, excluding announced maintenance | Operational objective |
+| Process-ready RTO / host-visible recovery | 15 seconds / 90 seconds | 15 seconds automated; 90-second deployment drill required |
+
+The proposed public-network mix is 20% registration/update, 30% lease-critical
+renew/delete, 30% browse, and 20% join authorization for HTTP. The UDP mix is
+60% authenticated host-presence refresh, 30% attempt contributions, and 10%
+invalid or duplicate traffic that must be dropped early. A deployment may use a
+lower per-game profile, but must not claim a higher one without new versioned
+evidence.
+
+The capacity harness fills the complete state ceilings, then measures
+registration plus presence, renewal, a 100-item compatible browse, join
+issuance, simultaneous two-peer pairing, principal revocation, and telemetry.
+It applies 200/100 ms guardrails and minimum 200 control / 2,000 mediation
+operations per second to the core hot path. Those measurements deliberately
+exclude Kestrel, LiteNetLib, TLS, JSON, socket scheduling, and the documented
+mixed traffic shape. The #23 real-network canary must exercise those layers,
+rate-shape the mix, record errors and shedding, and meet the public objectives
+before launch; a core result is not a public-network latency or throughput claim.
+
+## Reproduce the evidence
+
+Every push runs the quick profile and the selected fault matrix:
+
+```bash
+./scripts/run-capacity-gate.sh
+```
+
+Run the production candidate on an otherwise idle Linux host and restrict the
+runtime to two logical CPUs. The default candidate includes a five-minute,
+high-intensity expiry soak; use 3,600 seconds for a release-candidate endurance
+run:
+
+```bash
+export RENDEZVOUS_CAPACITY_PROFILE=candidate
+export RENDEZVOUS_CAPACITY_CPUSET=0,1
+export RENDEZVOUS_CAPACITY_OUTPUT="$PWD/artifacts/capacity/candidate.json"
+./scripts/run-capacity-gate.sh
+
+# Release-candidate endurance override:
+dotnet run --project tests/FinalFactory.Rendezvous.Capacity \
+  --configuration Release --no-build -- \
+  --profile candidate --soak-seconds 3600 \
+  --output artifacts/capacity/candidate-endurance.json
+```
+
+The machine must have at least 2 GiB available to the process. For formal
+deployment evidence, run inside the same cgroup/container shape as production.
+The v2 JSON embeds the commit and tree state, command, image context, CPU model,
+kernel, affinity, cgroup quota/limit, collector mode, and workload seed. Supply
+`RENDEZVOUS_EVIDENCE_IMAGE_DIGEST` when running a release image. Do not compare
+results collected under a debugger,
+concurrent build, thermal throttling, or oversubscribed CI host.
+
+The checked-in baseline is
+[`candidate-2cpu.json`](../evidence/capacity/v2/candidate-2cpu.json). It was
+produced on .NET 10.0.9/Linux x64 with CPU affinity restricted to two logical
+CPUs. It filled 25,000 listings and 10,000 attempts, peaked at about 162 MiB,
+and cleared all active/retained state. The five-minute baseline supersedes any
+earlier local probe when its timestamp and target duration differ.
+
+## Soak and bounded-state interpretation
+
+Each soak cycle creates a listing, repeatedly renews its lease and refreshes
+presence, creates a join attempt, replay marker, and retained outcome, checks
+that scheduled expiry entries remain proportional to live keys, then advances
+the injected monotonic clock beyond all
+deadlines, and verifies that listings, attempts, replay, idempotency, and outcome
+state return to zero. The candidate also measures managed-memory and process
+handle deltas after full collection. Failure is any retained state, more than
+64 MiB retained managed memory, more than eight retained handles, a working set
+above 1.5 GiB, an untyped capacity result, or failure to admit work after expiry.
+
+This accelerated soak intentionally executes far more state lifecycle/cleanup
+events than wall-clock traffic would permit. It catches stale deadline-queue
+entries, cache growth, replay/idempotency retention, and cleanup cost. Because
+it does not open Kestrel/LiteNetLib connections, its process-handle delta is only
+a harness guard and is not evidence of transport stability by itself. The
+selected production-process gate adds a ten-second real HTTP/UDP transport soak,
+samples child-process handles and RSS, asserts bounded growth, then verifies a
+clean SIGTERM and socket release. #23 must extend that into the full rate-shaped
+multi-client canary while sampling queues, managed memory, and state
+cardinalities. A one-hour core override remains required before tagging a
+production release.
+
+## Fault and recovery matrix
+
+`run-capacity-gate.sh` runs these deterministic production paths before the
+numeric profile:
+
+| Fault | Required result |
+| --- | --- |
+| HTTP/UDP overload and tracker exhaustion | Typed HTTP `429`/`CapacityExceeded`, silent UDP drop, bounded tracker keys, recovery after the window |
+| Optional traffic saturation | Lease-critical renew/update/delete capacity remains available |
+| Store/dependency unavailable | Readiness fails; new authorization returns typed `ServiceUnavailable`; liveness remains independent |
+| Graceful drain/SIGTERM | New work returns `Draining`; existing pairing may finish; process exits 0 and releases TCP/UDP before the deadline |
+| Hard restart | In-flight state is lost; SDK reports typed `ServiceUnavailable`; a host re-registers, rebinds presence, and becomes the only browser-visible replacement |
+| UDP listener bind/restart | Readiness stays false without the required listener; rebinding the advertised port restores native LiteNetLib pairing |
+| Wall-clock jump/skew | Monotonic lease/attempt authority is neither shortened nor extended; credential skew remains capped at 30 seconds |
+| Signing-secret rotation | New key signs, overlap verifies, retired/revoked key rejects, missing material fails startup |
+| Principal revocation | Listing, presence, attempts, and outcome paths are removed atomically within the latency budget |
+
+No external database exists in v1, so “dependency/store failure” means the
+process-local atomic store is marked unavailable or a required listener/key is
+unready. The service fails closed rather than pretending a degraded writable
+mode exists.
+
+## Bandwidth and amplification
+
+- Accepted application datagrams are at most 1,200 bytes.
+- Malformed, oversized, unauthenticated, stale, replayed, wrong-role, and
+  rate-limited traffic receives zero response bytes.
+- A completing authenticated contribution produces at most one introduction to
+  each observed peer, and the combined response is at most 2.0 times that
+  contribution's bytes.
+- The frozen-envelope and native LiteNetLib socket tests measure this on the real
+  UDP listener; the hostile corpus and allocation gate exercise 10,000+ inputs
+  without input-sized logs, tasks, or queues.
+
+Bandwidth planning must therefore reserve ingress for the configured 2,000
+datagrams/second plus edge overhead and egress for a worst-case verified 2.0
+amplification. Actual successful pairs normally use two contributions and two
+introductions; normal gameplay leaves Rendezvous entirely.
+
+## Availability decision
+
+Single-active remains the v1 topology. The measured core profile proves bounded
+state and substantial core-path headroom, while public launch capacity remains
+conditional on #23. The service has a bounded stop-before-start restart path.
+Its failure domain is deliberately
+one process/node/public UDP endpoint: node, kernel, host network, DNS/TLS edge,
+secret configuration, or operator error can remove all readiness until the cold
+replacement owns the same source-preserving endpoint.
+
+The 99.5% objective permits about 216 minutes of unannounced downtime in a
+30-day month. Operations must target process readiness within 15 seconds and
+host-visible re-registration within 90 seconds, page when no ready instance
+exists, and include detection plus recovery in the monthly budget. The current
+in-process test validates typed downtime, same-port HTTP restart, fresh
+registration, presence rebinding, and browser visibility in under five seconds;
+the production-process test separately validates graceful termination, TCP/UDP
+release, replacement startup on the same endpoints, UDP readiness, and the
+15-second process-ready RTO. Cold-standby activation policy and the 90-second
+operator-to-host recovery objective still require a deployment drill before
+release. Rollout and rollback use the
+deployment runbook's drain, stop, socket-release, start, smoke sequence; never
+overlap old and new active processes.
+
+Bring shared TTL/CAS state and deterministic mediator routing forward before
+enabling two active instances if any of these occurs:
+
+- one node cannot sustain 150% of the measured 30-day peak while meeting SLOs;
+- CPU stays above 70%, memory above 75%, attempt depth above 70%, or limiter
+  drops/latency remain elevated after abusive traffic is excluded;
+- the availability target rises above 99.5% or planned maintenance must preserve
+  listings; or
+- one region requires multiple simultaneously active mediator endpoints.
+
+Rendezvous makes no multi-instance claim today, so a two-node atomic-pairing
+test is intentionally not applicable. It becomes a hard release gate with the
+shared-state/routing implementation; until then `SingleActiveInstance=false`
+fails production startup. Multi-region and relay remain separate evidence-driven
+decisions.

docs/operations/observability-and-operator-runbook.md

@@ -115,7 +115,9 @@ permission denial is audited with actor and target fingerprints.
 Key revocation is process-local in the current single-instance store. Apply the
 same revocation to every instance, then replace configuration before restarting;
 a restart reconstructs the configured key ring. Principal revocation is bounded
-to ten minutes and removes that principal's active listings and attempts. Use
+to ten minutes and removes that principal's active listings and attempts. A
+repeat action may extend an active revocation but never shortens it; wait for its
+original deadline rather than treating a shorter repeat as an un-revoke. Use
 listing revocation for one targeted session and drain before planned shutdown.
 
 ## Audit retention and incident handling

docs/releases/README.md

@@ -0,0 +1,150 @@
+# Releases and compatibility
+
+Tracking: #19
+
+Rendezvous releases are immutable, reproducible, and promoted only after the
+same candidate has passed package, consumer, server, container, and staging
+checks. A release consists of matching Client and Contracts NuGet packages, a
+framework-dependent Linux server archive, a versioned linux/amd64 OCI image,
+package/runtime and container SPDX inventories, checksums, provenance, release
+notes, and signatures. No workflow publishes a `latest` tag.
+
+## Version dimensions
+
+The central values in `eng/Versions.props` are the authority. Client,
+Contracts, and Server use SemVer. HTTP, UDP mediation, and connection-ticket
+formats advance independently so a wire change cannot hide inside a package
+patch release. The current machine-readable matrix is
+[`compatibility.json`](compatibility.json); the authenticated operator status
+endpoint exposes the server's supported window at runtime.
+
+| Surface | Current | Compatibility rule |
+| --- | ---: | --- |
+| Client and Contracts | 1.0.0 | Matching exact versions; source/API breaks require a package major bump. |
+| Server | 1.0.0 | Accepts Client 1.0.0 through compatible 1.x releases. |
+| HTTP contract | 1 | Frozen OpenAPI, JSON vectors, and public API snapshot. |
+| UDP mediation | 1 | Frozen codec vectors; incompatible bytes require UDP v2. |
+| Connection ticket | 1 | A format change requires a new accepted ticket version and migration window. |
+| LiteNetLib | 2.1.4 | Exact dependency; LiteNetLib 1.x is rejected by package and consumer gates. |
+| Gameplay protocol | Per tenant | Exact match; Rendezvous does not translate gameplay protocols. |
+
+`scripts/check-compatibility.sh` compares protected snapshots against the base
+revision. A changed public API snapshot requires a package major increase; an
+HTTP or UDP golden surface requires the corresponding contract increase. The
+normal tests also compare implementation output with the current versioned
+snapshots. For a deliberate break, add a new versioned contract directory and
+documentation instead of replacing the prior version's evidence.
+
+## Candidate build
+
+From a clean tagged checkout:
+
+```bash
+./scripts/check-release-tag.sh v1.0.0
+./scripts/build-release.sh 1.0.0
+./scripts/verify-release.sh 1.0.0
+```
+
+The tag build runs inside the digest-pinned `release-builder` Docker stage,
+which combines the pinned SDK with a pinned Python runtime. It uses the locked
+dependency graph, enforces NuGet
+advisories and approved licenses, runs formatting/build/tests, regenerates the
+OpenAPI drift check, and packs twice after a clean rebuild. NuGet's random OPC
+relationship identifiers are canonicalized before comparison; both `.nupkg`
+and `.snupkg` outputs must then be byte-identical. Package metadata identifies the exact
+repository commit, portable PDBs carry SourceLink data, and the Linux archive,
+runtime SBOM timestamp, and checksum ordering are deterministic. Buildx and
+BuildKit are also pinned for the linux/amd64 OCI build. Provenance records each
+artifact-producing tool version; an out-of-band rebuild must use the pinned
+builder and recorded versions rather than treating the runner label as a
+reproducibility guarantee.
+All project-authored artifact normalization and checksum updates run inside the
+same pinned builder; host tools only orchestrate or verify. The separately
+pinned Trivy and Cosign tools produce the container inventory and signatures.
+The tag workflow also performs two no-cache image builds with the commit time
+and revision fixed, disables unsigned builder-generated attestations, and
+requires identical OCI image IDs before signing the project provenance.
+
+The local gate builds net8.0 SpaceGame- and Unscouted-shaped API fixtures using
+only the candidate feed plus NuGet.org; the Unscouted fixture also carries its
+real direct LiteNetLib 2.1.4 pin. The tag gate separately checks out the exact
+SpaceGame and Unscouted revisions in `eng/consumer-revisions.json`, injects
+exact candidate references without modifying those repositories, and restores
+their real game/network projects. Both paths must resolve the matching Client
+and Contracts version and LiteNetLib 2.1.4. Updating a consumer revision is a
+reviewed compatibility change, not a floating-main check.
+
+## Promotion and publication
+
+Pushing the matching `vMAJOR.MINOR.PATCH` tag starts the tag-only release
+workflow. Before any external write it:
+
+1. builds and verifies the artifact set;
+2. builds the exact versioned container candidate;
+3. starts that image with production hardening and a temporary staging key;
+4. completes HTTP health, registration, browse, authenticated UDP mediation,
+   and direct traffic;
+5. rejects all high or critical container findings and emits a container SPDX
+   inventory;
+6. finalizes and verifies checksums over the publish-ready artifact set; and
+7. confirms the two NuGet versions, container version, and Gitea release do not
+   already exist.
+
+Publication has no skip-duplicate behavior. Gitea's immutable package versions,
+the workflow concurrency lock, and the preflight make a successful tag a
+single publication event. The workflow pushes symbols, publishes only the
+versioned container tag, records its `sha256` digest in both a digest file and
+provenance, regenerates the checksum manifest so that digest and public key are
+covered, signs the checksum manifest and image, attaches signed provenance,
+verifies the complete published-set schema and all signatures, and creates the
+Gitea release with exactly those artifacts. The detached checksum signature
+bundle is the sole envelope excluded from its own signed manifest.
+The loaded image ID is captured immediately after the byte-reproducible build;
+publication refuses to push if staging or another process retagged that local
+name to different bytes.
+
+The protected `production` environment requires these secrets:
+
+- `RELEASE_TOKEN`: a dedicated Gitea token limited to this repository and the
+  HeiKyu package registry, with repository and package write access;
+- `RELEASE_USERNAME`: the dedicated Gitea service-account name that owns the
+  release token;
+- `COSIGN_PRIVATE_KEY`: the encrypted Cosign release private key; and
+- `COSIGN_PASSWORD`: its password, stored separately.
+
+No development signing key, registry credential, or deployable configuration
+is stored in source or packages. Keep the Cosign public key with operational
+records. Rotate the release key between releases: retain the old public key for
+historical verification, install the new encrypted private key and password as
+one reviewed change, verify a signed non-release blob, and only then retire the
+old secret. Suspected compromise requires token/key revocation and a new
+version; never overwrite or delete evidence to reuse a released version.
+
+## Release notes and migration
+
+Every dated `CHANGELOG.md` entry must contain Compatibility, Security and
+configuration, and Migration sections. Before tagging, state the supported
+Client/server window, all HTTP/UDP/ticket changes, security fixes, required
+configuration, and operator/consumer migration steps.
+
+For a protocol migration, first make the server read both old and new versions
+within an explicit bounded window, publish a Client that writes the new version,
+verify adoption through bounded telemetry, then remove the old reader only in a
+subsequent breaking release. Never silently reinterpret old bytes. Consumers
+pin both Rendezvous packages to one exact version and choose gameplay protocol
+compatibility per tenant.
+
+## Rollback and interrupted publication
+
+Runtime rollback means redeploying the previous known-good image by digest and
+its matching configuration; it does not move a tag. Packages and release
+records remain available so already restored clients stay reproducible. If a
+new release is faulty, revoke affected publisher or signing keys when relevant,
+mark the release notes as withdrawn, and publish the fix under a new SemVer.
+
+The registries cannot provide a transaction spanning NuGet, OCI, signatures,
+and release attachments. If publication stops after its first external write,
+the preflight intentionally prevents an automatic rerun. An operator must
+inventory every destination, preserve logs and hashes, complete or withdraw the
+partial version under change control, and then issue a new version. This avoids
+turning a partial failure into an untraceable overwrite.

docs/releases/compatibility.json

@@ -0,0 +1,27 @@
+{
+  "schemaVersion": 1,
+  "release": "1.0.0",
+  "server": {
+    "minimumClientVersion": "1.0.0",
+    "maximumClientMajorVersion": 1
+  },
+  "packages": {
+    "FinalFactory.Rendezvous.Client": "1.0.0",
+    "FinalFactory.Rendezvous.Contracts": "1.0.0"
+  },
+  "contracts": {
+    "http": [1],
+    "udp": [1],
+    "connectionTicket": [1],
+    "gameplay": "exact-per-tenant"
+  },
+  "transport": {
+    "package": "LiteNetLib",
+    "version": "2.1.4",
+    "major": 2
+  },
+  "consumers": {
+    "SpaceGame": "net8.0",
+    "Unscouted": "net8.0"
+  }
+}

docs/security/provisioning.md

@@ -63,8 +63,9 @@ only its public key ID/lifecycle metadata and does not require retired secret
 material to remain available.
 
 Key IDs are non-secret base64url identifiers. Secret references are resolved
-through `ISecretProvider`; production supports `env:<VARIABLE>` references and
+through `ISecretProvider`; production supports base64 `env:<VARIABLE>` and raw
-the interface is replaceable by a deployment-specific vault/KMS adapter. The
+`file:/absolute/path` references to bounded non-symlink files. The interface is
+replaceable by a deployment-specific vault/KMS adapter. The
 committed development profile uses an in-memory random key identified by a
 `development:ephemeral/...` reference. It never writes key material to disk and
 all credentials become invalid when the process exits.
@@ -74,8 +75,10 @@ all credentials become invalid when the process exits.
 `Rendezvous:Provisioning` supplies issuer, audience, clock skew, signing-key
 descriptors, and game policies. A production key reference such as
 `env:RENDEZVOUS_SIGNING_KEY_2026_01` expects that environment variable to hold at
-least 32 random bytes encoded as base64. Missing, malformed, short, inactive, or
+least 32 random bytes encoded as base64. `file:/run/secrets/rendezvous-signing`
-duplicate keys stop startup with a key-ID-only diagnostic. No game-wide secret
+expects the raw bytes in a read-only, absolute, non-symlink file. Missing,
+malformed, short, inactive, or duplicate keys stop startup with a key-ID-only
+diagnostic. No game-wide secret
 belongs in `appsettings`, source control, examples, the Client package, URLs,
 responses, logs, metrics, exceptions, or diagnostic dumps.
 

eng/Versions.props

@@ -0,0 +1,15 @@
+<Project>
+  <PropertyGroup>
+    <RendezvousVersion>1.0.0</RendezvousVersion>
+    <RendezvousMajorVersion>1</RendezvousMajorVersion>
+    <RendezvousMinorVersion>0</RendezvousMinorVersion>
+    <RendezvousPatchVersion>0</RendezvousPatchVersion>
+    <MinimumClientVersion>1.0.0</MinimumClientVersion>
+    <MaximumClientMajorVersion>1</MaximumClientMajorVersion>
+    <HttpContractVersion>1</HttpContractVersion>
+    <UdpContractVersion>1</UdpContractVersion>
+    <ConnectionTicketFormatVersion>1</ConnectionTicketFormatVersion>
+    <LiteNetLibVersion>2.1.4</LiteNetLibVersion>
+    <LiteNetLibMajorVersion>2</LiteNetLibMajorVersion>
+  </PropertyGroup>
+</Project>

eng/consumer-revisions.json

@@ -0,0 +1,17 @@
+{
+  "schemaVersion": 1,
+  "consumers": [
+    {
+      "name": "SpaceGame",
+      "repository": "https://git.finalfactory.de/Kyuubi/SpaceGame.git",
+      "revision": "77519b0cc418a27f8d408ae2d7b8812fbe087c04",
+      "project": "SpaceGame.csproj"
+    },
+    {
+      "name": "Unscouted",
+      "repository": "https://git.finalfactory.de/HeiKyu/Unscouted.git",
+      "revision": "7807dbee86eb8b98e702f1eb89c88adff728f635",
+      "project": "Net.Core/Net.Core.csproj"
+    }
+  ]
+}

eng/release-builder.Dockerfile

@@ -0,0 +1,14 @@
+# syntax=docker/dockerfile:1.7@sha256:a57df69d0ea827fb7266491f2813635de6f17269be881f696fbfdf2d83dda33e
+FROM python:3.12.11-slim-bookworm@sha256:c00fc7b44d844b6da22861ec24af43968a5200eac4ec607b4725d585165d6b49 AS release-python
+FROM ghcr.io/jqlang/jq:1.8.1@sha256:95de8f005ca027686a1ca3b0853e2bb219062438015862816159f3f25a4d4230 AS release-jq
+
+FROM mcr.microsoft.com/dotnet/sdk:10.0.301-noble@sha256:ea8bde36c11b6e7eec2656d0e59101d4462f6bd630730f2c8201ed0572b295d5 AS release-builder
+COPY --from=release-python /usr/local/ /usr/local/
+COPY --from=release-jq /jq /usr/local/bin/jq
+RUN dotnet --version \
+    && python3 --version \
+    && git --version \
+    && tar --version \
+    && gzip --version \
+    && jq --version
+WORKDIR /source

eng/release-policy.json

@@ -0,0 +1,27 @@
+{
+  "schemaVersion": 1,
+  "packageRegistry": "https://git.finalfactory.de/api/packages/HeiKyu/nuget/index.json",
+  "containerRepository": "git.finalfactory.de/heikyu/rendezvous",
+  "allowedLicenseExpressions": [
+    "Apache-2.0",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "MIT"
+  ],
+  "dependencyLicenseOverrides": {
+    "xunit.abstractions/2.0.3": {
+      "license": "Apache-2.0",
+      "reason": "Legacy package predates NuGet SPDX metadata; reviewed against the xUnit.net Apache-2.0 license."
+    }
+  },
+  "publishedPackages": [
+    "FinalFactory.Rendezvous.Client",
+    "FinalFactory.Rendezvous.Contracts"
+  ],
+  "forbiddenArtifactNameFragments": [
+    "credential",
+    "password",
+    "private-key",
+    "signing-key"
+  ]
+}

eng/release_artifacts.py

@@ -0,0 +1,823 @@
+#!/usr/bin/env python3
+import argparse
+import datetime as dt
+import hashlib
+import json
+import os
+import pathlib
+import re
+import sys
+import zipfile
+import xml.etree.ElementTree as ET
+from xml.sax.saxutils import escape
+
+
+PROJECT_PACKAGE_PREFIX = "finalfactory.rendezvous."
+CORE_PROPERTIES_PATH = (
+    "package/services/metadata/core-properties/core-properties.psmdcp"
+)
+
+
+def fail(message: str) -> None:
+    raise SystemExit(message)
+
+
+def load_json(path: pathlib.Path):
+    with path.open(encoding="utf-8") as stream:
+        return json.load(stream)
+
+
+def dependency_inventory(root: pathlib.Path):
+    dependencies = {}
+    for lock_path in sorted(root.glob("**/packages.lock.json")):
+        if any(part in {"bin", "obj", "artifacts"} for part in lock_path.parts):
+            continue
+        lock = load_json(lock_path)
+        for framework in lock.get("dependencies", {}).values():
+            for package_id, details in framework.items():
+                resolved = details.get("resolved")
+                if not resolved or package_id.lower().startswith(PROJECT_PACKAGE_PREFIX):
+                    continue
+                key = package_id.lower()
+                previous = dependencies.get(key)
+                if previous is not None and previous[1] != resolved:
+                    fail(
+                        f"Dependency {package_id} resolves to both {previous[1]} and {resolved}."
+                    )
+                dependencies[key] = (package_id, resolved)
+    return [dependencies[key] for key in sorted(dependencies)]
+
+
+def package_license(package_id: str, version: str, overrides):
+    package_root = pathlib.Path(
+        os.environ.get("NUGET_PACKAGES", pathlib.Path.home() / ".nuget" / "packages")
+    )
+    version_dir = package_root / package_id.lower() / version
+    nuspecs = list(version_dir.glob("*.nuspec"))
+    if len(nuspecs) != 1:
+        fail(f"Expected one restored nuspec for {package_id} {version} in {version_dir}.")
+    root = ET.parse(nuspecs[0]).getroot()
+    license_element = root.find(".//{*}license")
+    if license_element is None or license_element.get("type") != "expression":
+        override = overrides.get(f"{package_id.lower()}/{version}")
+        if override is None:
+            fail(f"{package_id} {version} does not declare an SPDX license expression.")
+        return override["license"]
+    expression = (license_element.text or "").strip()
+    if not expression:
+        fail(f"{package_id} {version} has an empty license expression.")
+    return expression
+
+
+def command_policy(args) -> None:
+    root = pathlib.Path(args.root).resolve()
+    policy = load_json(root / "eng" / "release-policy.json")
+    allowed = set(policy["allowedLicenseExpressions"])
+    inventory = dependency_inventory(root)
+    observed = []
+    for package_id, version in inventory:
+        expression = package_license(
+            package_id, version, policy.get("dependencyLicenseOverrides", {})
+        )
+        if expression not in allowed:
+            fail(
+                f"Dependency {package_id} {version} uses unapproved license {expression}."
+            )
+        observed.append({"id": package_id, "version": version, "license": expression})
+    lite_net_lib = [item for item in observed if item["id"].lower() == "litenetlib"]
+    if lite_net_lib != [{"id": "LiteNetLib", "version": "2.1.4", "license": "MIT"}]:
+        fail(f"LiteNetLib must resolve exactly to the reviewed 2.1.4 release: {lite_net_lib}")
+    print(json.dumps({"dependencies": observed}, indent=2))
+
+
+def command_audit(args) -> None:
+    document = load_json(pathlib.Path(args.input))
+    findings = []
+
+    def visit(value):
+        if isinstance(value, dict):
+            if value.get("vulnerabilities"):
+                findings.append(value)
+            for child in value.values():
+                visit(child)
+        elif isinstance(value, list):
+            for child in value:
+                visit(child)
+
+    visit(document)
+    if findings:
+        fail(f"Locked dependency graph contains known vulnerabilities: {findings}")
+    print("Locked dependency graph has no reported vulnerabilities.")
+
+
+def release_dependency_graph(root: pathlib.Path, server_deps: pathlib.Path):
+    dependencies = {}
+    edges = set()
+    server_document = load_json(server_deps)
+    for package_key, details in server_document.get("libraries", {}).items():
+        if details.get("type") != "package":
+            continue
+        package_id, version = package_key.rsplit("/", 1)
+        dependencies[package_id.lower()] = (package_id, version)
+    server_target = next(iter(server_document.get("targets", {}).values()), {})
+    for source_key, details in server_target.items():
+        source_id = source_key.rsplit("/", 1)[0]
+        source = (
+            "SPDXRef-Server"
+            if source_id == "FinalFactory.Rendezvous.Server"
+            else source_id.lower()
+        )
+        for dependency_id in details.get("dependencies", {}):
+            target = {
+                "FinalFactory.Rendezvous.Contracts": "SPDXRef-Contracts",
+                "FinalFactory.Rendezvous.Client": "SPDXRef-Client",
+            }.get(dependency_id, dependency_id.lower())
+            edges.add((source, target))
+
+    lock_roots = (
+        ("SPDXRef-Client", root / "src/FinalFactory.Rendezvous.Client/packages.lock.json"),
+        (
+            "SPDXRef-Contracts",
+            root / "src/FinalFactory.Rendezvous.Contracts/packages.lock.json",
+        ),
+    )
+    for root_id, lock_path in lock_roots:
+        lock = load_json(lock_path)
+        for framework in lock.get("dependencies", {}).values():
+            for package_id, details in framework.items():
+                resolved = details.get("resolved")
+                if resolved and not package_id.lower().startswith(PROJECT_PACKAGE_PREFIX):
+                    dependencies[package_id.lower()] = (package_id, resolved)
+                    if details.get("type") == "Direct":
+                        edges.add((root_id, package_id.lower()))
+                source = package_id.lower()
+                for dependency_id in details.get("dependencies", {}):
+                    if dependency_id.lower().startswith(PROJECT_PACKAGE_PREFIX):
+                        continue
+                    edges.add((source, dependency_id.lower()))
+    edges.add(("SPDXRef-Client", "SPDXRef-Contracts"))
+    inventory = [dependencies[key] for key in sorted(dependencies)]
+    return inventory, edges
+
+
+def command_sbom(args) -> None:
+    root = pathlib.Path(args.root).resolve()
+    policy = load_json(root / "eng" / "release-policy.json")
+    overrides = policy.get("dependencyLicenseOverrides", {})
+    packages = [
+        {
+            "SPDXID": "SPDXRef-Rendezvous",
+            "name": "FinalFactory.Rendezvous",
+            "versionInfo": args.version,
+            "downloadLocation": "NOASSERTION",
+            "filesAnalyzed": False,
+            "licenseConcluded": "NOASSERTION",
+            "licenseDeclared": "NOASSERTION",
+            "copyrightText": "NOASSERTION",
+        }
+    ]
+    internal_packages = [
+        ("SPDXRef-Server", "FinalFactory.Rendezvous.Server"),
+        ("SPDXRef-Client", "FinalFactory.Rendezvous.Client"),
+        ("SPDXRef-Contracts", "FinalFactory.Rendezvous.Contracts"),
+    ]
+    for spdx_id, package_id in internal_packages:
+        packages.append(
+            {
+                "SPDXID": spdx_id,
+                "name": package_id,
+                "versionInfo": args.version,
+                "downloadLocation": "NOASSERTION",
+                "filesAnalyzed": False,
+                "licenseConcluded": "NOASSERTION",
+                "licenseDeclared": "NOASSERTION",
+                "copyrightText": "NOASSERTION",
+            }
+        )
+    inventory, dependency_edges = release_dependency_graph(
+        root, pathlib.Path(args.server_deps)
+    )
+    dependency_ids = {}
+    for index, (package_id, version) in enumerate(
+        inventory, start=1
+    ):
+        expression = package_license(package_id, version, overrides)
+        spdx_id = f"SPDXRef-Package-{index}"
+        dependency_ids[package_id.lower()] = spdx_id
+        packages.append(
+            {
+                "SPDXID": spdx_id,
+                "name": package_id,
+                "versionInfo": version,
+                "downloadLocation": "NOASSERTION",
+                "filesAnalyzed": False,
+                "licenseConcluded": expression,
+                "licenseDeclared": expression,
+                "copyrightText": "NOASSERTION",
+                "externalRefs": [
+                    {
+                        "referenceCategory": "PACKAGE-MANAGER",
+                        "referenceType": "purl",
+                        "referenceLocator": f"pkg:nuget/{package_id}@{version}",
+                    }
+                ],
+            }
+        )
+    created = dt.datetime.fromtimestamp(
+        int(args.source_date_epoch), dt.timezone.utc
+    ).strftime("%Y-%m-%dT%H:%M:%SZ")
+    document = {
+        "spdxVersion": "SPDX-2.3",
+        "dataLicense": "CC0-1.0",
+        "SPDXID": "SPDXRef-DOCUMENT",
+        "name": f"FinalFactory.Rendezvous-{args.version}",
+        "documentNamespace": (
+            "https://git.finalfactory.de/HeiKyu/Rendezvous/sbom/"
+            f"{args.version}/{args.commit}"
+        ),
+        "creationInfo": {
+            "created": created,
+            "creators": ["Tool: eng/release_artifacts.py"],
+        },
+        "documentDescribes": ["SPDXRef-Rendezvous"],
+        "packages": packages,
+        "relationships": [
+            {
+                "spdxElementId": "SPDXRef-Rendezvous",
+                "relationshipType": "CONTAINS",
+                "relatedSpdxElement": spdx_id,
+            }
+            for spdx_id, _ in internal_packages
+        ]
+        + [
+            {
+                "spdxElementId": dependency_ids.get(source, source),
+                "relationshipType": "DEPENDS_ON",
+                "relatedSpdxElement": dependency_ids.get(target, target),
+            }
+            for source, target in sorted(dependency_edges)
+            if source in dependency_ids or source.startswith("SPDXRef-")
+            if target in dependency_ids or target.startswith("SPDXRef-")
+        ],
+    }
+    output = pathlib.Path(args.output)
+    output.parent.mkdir(parents=True, exist_ok=True)
+    output.write_text(json.dumps(document, indent=2) + "\n", encoding="utf-8")
+
+
+def nuspec_metadata(archive: pathlib.Path):
+    with zipfile.ZipFile(archive) as package:
+        names = package.namelist()
+        nuspecs = [name for name in names if name.endswith(".nuspec")]
+        if len(nuspecs) != 1:
+            fail(f"{archive.name} must contain exactly one nuspec.")
+        root = ET.fromstring(package.read(nuspecs[0]))
+    metadata = root.find(".//{*}metadata")
+    if metadata is None:
+        fail(f"{archive.name} has no package metadata.")
+    values = {
+        child.tag.rsplit("}", 1)[-1]: (child.text or "").strip()
+        for child in metadata
+        if len(child) == 0
+    }
+    dependencies = {
+        item.get("id"): item.get("version")
+        for item in metadata.findall(".//{*}dependency")
+    }
+    repository = metadata.find("./{*}repository")
+    repository_attributes = {} if repository is None else dict(repository.attrib)
+    return values, dependencies, repository_attributes
+
+
+def verify_checksum_file(release_dir: pathlib.Path, excluded=()) -> None:
+    checksum_path = release_dir / "checksums.sha256"
+    lines = checksum_path.read_text(encoding="utf-8").splitlines()
+    if not lines:
+        fail("checksums.sha256 is empty.")
+    referenced = set()
+    for line in lines:
+        digest, marker, relative = line.partition("  ")
+        if marker != "  " or not re.fullmatch(r"[0-9a-f]{64}", digest):
+            fail(f"Malformed checksum line: {line}")
+        target = release_dir / relative
+        if not target.is_file():
+            fail(f"Checksum references missing artifact: {relative}")
+        actual = hashlib.sha256(target.read_bytes()).hexdigest()
+        if actual != digest:
+            fail(f"Checksum mismatch for {relative}.")
+        referenced.add(relative)
+    expected = {
+        path.name
+        for path in release_dir.iterdir()
+        if path.is_file()
+        and path.name != "checksums.sha256"
+        and path.name not in excluded
+    }
+    if referenced != expected:
+        fail(
+            "Checksum manifest coverage differs. "
+            f"Missing={expected - referenced}; extra={referenced - expected}"
+        )
+
+
+def command_verify(args) -> None:
+    release_dir = pathlib.Path(args.release_dir).resolve()
+    version = args.version
+    expected = {
+        f"FinalFactory.Rendezvous.Client.{version}.nupkg",
+        f"FinalFactory.Rendezvous.Client.{version}.snupkg",
+        f"FinalFactory.Rendezvous.Contracts.{version}.nupkg",
+        f"FinalFactory.Rendezvous.Contracts.{version}.snupkg",
+        f"FinalFactory.Rendezvous.Server.{version}.linux-x64.tar.gz",
+        f"FinalFactory.Rendezvous.{version}.spdx.json",
+        "CHANGELOG.md",
+        "checksums.sha256",
+        "release-provenance.json",
+    }
+    checksum_exclusions = set()
+    if args.phase in {"publish-ready", "signing-ready", "published"}:
+        expected.add(f"FinalFactory.Rendezvous.Container.{version}.spdx.json")
+    if args.phase in {"signing-ready", "published"}:
+        expected.update({"container-digest.txt", "cosign.pub"})
+    if args.phase == "published":
+        expected.add("checksums.sha256.bundle")
+        checksum_exclusions.add("checksums.sha256.bundle")
+    actual = {path.name for path in release_dir.iterdir() if path.is_file()}
+    if actual != expected:
+        fail(f"Release artifact set differs. Missing={expected - actual}; extra={actual - expected}")
+
+    if args.phase in {"publish-ready", "signing-ready", "published"}:
+        container_sbom = load_json(
+            release_dir / f"FinalFactory.Rendezvous.Container.{version}.spdx.json"
+        )
+        if container_sbom.get("spdxVersion") != "SPDX-2.3":
+            fail("Container inventory must be an SPDX 2.3 document.")
+        if not container_sbom.get("packages"):
+            fail("Container SPDX inventory contains no packages.")
+
+    policy = load_json(pathlib.Path(args.root) / "eng" / "release-policy.json")
+    forbidden = tuple(fragment.lower() for fragment in policy["forbiddenArtifactNameFragments"])
+    for artifact in actual:
+        if artifact != "release-provenance.json" and any(fragment in artifact.lower() for fragment in forbidden):
+            fail(f"Forbidden secret-like artifact name: {artifact}")
+
+    release_sbom = load_json(
+        release_dir / f"FinalFactory.Rendezvous.{version}.spdx.json"
+    )
+    package_ids = {
+        package.get("name"): package.get("SPDXID")
+        for package in release_sbom.get("packages", [])
+    }
+    relationships = {
+        (
+            relationship.get("spdxElementId"),
+            relationship.get("relationshipType"),
+            relationship.get("relatedSpdxElement"),
+        )
+        for relationship in release_sbom.get("relationships", [])
+    }
+    expected_component_edges = {
+        ("SPDXRef-Server", "SPDXRef-Contracts"),
+        ("SPDXRef-Server", package_ids.get("LiteNetLib")),
+        ("SPDXRef-Server", package_ids.get("Microsoft.AspNetCore.OpenApi")),
+        ("SPDXRef-Client", "SPDXRef-Contracts"),
+        ("SPDXRef-Client", package_ids.get("LiteNetLib")),
+        ("SPDXRef-Contracts", package_ids.get("System.Text.Json")),
+    }
+    for source, target in expected_component_edges:
+        if not target or (source, "DEPENDS_ON", target) not in relationships:
+            fail(f"Release SPDX inventory is missing component edge {source} -> {target}.")
+    bcl_id = package_ids.get("Microsoft.Bcl.AsyncInterfaces")
+    if ("SPDXRef-Server", "DEPENDS_ON", bcl_id) in relationships:
+        fail("Release SPDX inventory incorrectly flattens transitive dependencies onto Server.")
+
+    for package_id in policy["publishedPackages"]:
+        package = release_dir / f"{package_id}.{version}.nupkg"
+        metadata, dependencies, repository = nuspec_metadata(package)
+        if metadata.get("id") != package_id or metadata.get("version") != version:
+            fail(f"{package.name} identity/version metadata is incorrect.")
+        if metadata.get("projectUrl") != "https://git.finalfactory.de/HeiKyu/Rendezvous":
+            fail(f"{package.name} has an incorrect project URL.")
+        if repository.get("url") != "https://git.finalfactory.de/HeiKyu/Rendezvous":
+            fail(f"{package.name} has an incorrect repository URL.")
+        if repository.get("commit") != provenance_commit(release_dir):
+            fail(f"{package.name} does not identify the release commit.")
+        symbol_package = release_dir / f"{package_id}.{version}.snupkg"
+        with zipfile.ZipFile(symbol_package) as symbols:
+            if not any(name.endswith(".pdb") for name in symbols.namelist()):
+                fail(f"{symbol_package.name} contains no portable PDB.")
+        with zipfile.ZipFile(package) as archive:
+            names = set(archive.namelist())
+            required_entries = {
+                "README.md",
+                "CHANGELOG.md",
+                f"lib/netstandard2.1/{package_id}.dll",
+            }
+            if not required_entries <= names:
+                fail(
+                    f"{package.name} is missing required package content: "
+                    f"{required_entries - names}"
+                )
+            forbidden_entries = [
+                name
+                for name in names
+                if any(
+                    fragment in name.lower()
+                    for fragment in (
+                        "appsettings",
+                        "launchsettings",
+                        ".env",
+                        "credential",
+                        "signing-key",
+                        "private-key",
+                    )
+                )
+            ]
+            if forbidden_entries:
+                fail(
+                    f"{package.name} contains deployable configuration or secrets: "
+                    f"{forbidden_entries}"
+                )
+        if package_id.endswith(".Client"):
+            if dependencies.get("LiteNetLib") != "[2.1.4]":
+                fail(f"Client package must pin LiteNetLib exactly to 2.1.4: {dependencies}")
+            contracts_range = dependencies.get("FinalFactory.Rendezvous.Contracts", "")
+            if contracts_range != f"[{version}]":
+                fail(f"Client package does not depend on the matching Contracts version.")
+
+    provenance = load_json(release_dir / "release-provenance.json")
+    if provenance.get("version") != version:
+        fail("Release provenance does not identify the requested version.")
+    if provenance.get("treeState") != "clean" and not args.allow_dirty:
+        fail("Release provenance must identify a clean tree.")
+    container = provenance.get("containerImage", "")
+    if container.endswith(":latest") or ":latest@" in container or f":{version}" not in container:
+        fail(f"Container reference is mutable or not versioned: {container}")
+    if provenance.get("containerPlatform") != "linux/amd64":
+        fail("Release provenance must pin the linux/amd64 container platform.")
+    for field in ("containerBaseDigests", "releaseBuilderBaseDigests"):
+        images = provenance.get(field, [])
+        if not images or any("@sha256:" not in image or image.endswith(":latest") for image in images):
+            fail(f"Release provenance contains an unpinned build image in {field}: {images}")
+    build_tools = provenance.get("buildTools", [])
+    required_tool_prefixes = ("dotnet", "python=", "tar=", "gzip=", "jq=")
+    observed_tools = [f"dotnet={provenance.get('dotnetSdk', '')}", *build_tools]
+    for prefix in required_tool_prefixes:
+        if not any(tool.startswith(prefix) for tool in observed_tools):
+            fail(f"Release provenance is missing an artifact tool version: {prefix}")
+    if args.phase in {"publish-ready", "signing-ready", "published"}:
+        if not re.fullmatch(
+            r"sha256:[0-9a-f]{64}", provenance.get("containerImageId", "")
+        ):
+            fail("Release provenance is missing the verified local container image ID.")
+        expected_namespace = (
+            "https://git.finalfactory.de/HeiKyu/Rendezvous/container-sbom/"
+            f"{version}/{provenance_commit(release_dir)}"
+        )
+        if container_sbom.get("documentNamespace") != expected_namespace:
+            fail("Container SPDX inventory does not identify the release commit.")
+        expected_created = dt.datetime.fromtimestamp(
+            int(provenance.get("sourceDateEpoch", 0)), dt.timezone.utc
+        ).strftime("%Y-%m-%dT%H:%M:%SZ")
+        if container_sbom.get("creationInfo", {}).get("created") != expected_created:
+            fail("Container SPDX timestamp is not normalized to the source epoch.")
+    if args.phase in {"signing-ready", "published"}:
+        digest = (release_dir / "container-digest.txt").read_text(
+            encoding="utf-8"
+        ).strip()
+        if not re.fullmatch(
+            r"git\.finalfactory\.de/heikyu/rendezvous@sha256:[0-9a-f]{64}", digest
+        ):
+            fail(f"Published container digest is invalid: {digest}")
+        if provenance.get("containerDigest") != digest:
+            fail("Published provenance and container digest file differ.")
+        for prefix in ("docker-buildx=", "buildkit="):
+            if not any(tool.startswith(prefix) for tool in build_tools):
+                fail(f"Published provenance is missing container tool version: {prefix}")
+    verify_checksum_file(release_dir, checksum_exclusions)
+    print(f"Verified {args.phase} release artifact set for {version}.")
+
+
+def provenance_commit(release_dir: pathlib.Path) -> str:
+    provenance = load_json(release_dir / "release-provenance.json")
+    commit = provenance.get("commit", "")
+    if not re.fullmatch(r"[0-9a-f]{40}", commit):
+        fail("Release provenance must contain a full Git commit SHA.")
+    return commit
+
+
+def command_consumer(args) -> None:
+    assets = load_json(pathlib.Path(args.assets))
+    libraries = assets.get("libraries", {})
+    required = {
+        f"FinalFactory.Rendezvous.Client/{args.version}",
+        f"FinalFactory.Rendezvous.Contracts/{args.version}",
+        "LiteNetLib/2.1.4",
+    }
+    missing = required - set(libraries)
+    if missing:
+        fail(f"Consumer restore is missing exact release dependencies: {missing}")
+    forbidden = [name for name in libraries if name.lower().startswith("litenetlib/1.")]
+    if forbidden:
+        fail(f"Consumer resolved forbidden LiteNetLib 1.x assets: {forbidden}")
+
+
+def command_consumer_config(args) -> None:
+    local_source = escape(str(pathlib.Path(args.local_source).resolve()))
+    configuration = f'''<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="rendezvous-candidate" value="{local_source}" />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+  </packageSources>
+  <packageSourceMapping>
+    <packageSource key="rendezvous-candidate">
+      <package pattern="FinalFactory.Rendezvous.*" />
+    </packageSource>
+    <packageSource key="nuget.org">
+      <package pattern="*" />
+    </packageSource>
+  </packageSourceMapping>
+</configuration>
+'''
+    pathlib.Path(args.output).write_text(configuration, encoding="utf-8")
+
+
+def command_source_link(args) -> None:
+    document = load_json(pathlib.Path(args.file))
+    mappings = document.get("documents", {})
+    expected = (
+        "https://git.finalfactory.de/HeiKyu/Rendezvous/raw/commit/"
+        f"{args.commit}/"
+    )
+    if not mappings or any(not value.startswith(expected) for value in mappings.values()):
+        fail(f"SourceLink mappings do not identify commit {args.commit}: {mappings}")
+
+
+def command_normalize_package(args) -> None:
+    package_path = pathlib.Path(args.package).resolve()
+    if package_path.suffix not in {".nupkg", ".snupkg"}:
+        fail(f"Unsupported NuGet archive extension: {package_path.name}")
+    timestamp = dt.datetime.fromtimestamp(
+        int(args.source_date_epoch), dt.timezone.utc
+    )
+    zip_timestamp = (
+        max(timestamp.year, 1980),
+        timestamp.month,
+        timestamp.day,
+        timestamp.hour,
+        timestamp.minute,
+        timestamp.second - (timestamp.second % 2),
+    )
+    with zipfile.ZipFile(package_path) as source:
+        entries = {name: source.read(name) for name in source.namelist()}
+    if ".signature.p7s" in entries:
+        fail(f"Refusing to rewrite signed package: {package_path.name}")
+    core_paths = [
+        name
+        for name in entries
+        if name.startswith("package/services/metadata/core-properties/")
+        and name.endswith(".psmdcp")
+    ]
+    if len(core_paths) != 1:
+        fail(f"Expected one NuGet core-properties part in {package_path.name}.")
+    entries[CORE_PROPERTIES_PATH] = entries.pop(core_paths[0])
+
+    nuspec_paths = [name for name in entries if name.endswith(".nuspec")]
+    if len(nuspec_paths) != 1:
+        fail(f"Expected one nuspec in {package_path.name}.")
+    nuspec = ET.fromstring(entries[nuspec_paths[0]])
+    nuspec_namespace = nuspec.tag.partition("}")[0].removeprefix("{")
+    if nuspec_namespace:
+        ET.register_namespace("", nuspec_namespace)
+    package_id = nuspec.findtext(".//{*}id")
+    if package_id == "FinalFactory.Rendezvous.Client":
+        contracts = nuspec.find(
+            ".//{*}dependency[@id='FinalFactory.Rendezvous.Contracts']"
+        )
+        if contracts is None:
+            fail("Client package has no Contracts dependency to pin.")
+        contracts.set("version", f"[{args.version}]")
+        entries[nuspec_paths[0]] = ET.tostring(
+            nuspec, encoding="utf-8", xml_declaration=True
+        )
+
+    relationships_namespace = (
+        "http://schemas.openxmlformats.org/package/2006/relationships"
+    )
+    ET.register_namespace("", relationships_namespace)
+    relationships = ET.fromstring(entries["_rels/.rels"])
+    for relationship in relationships:
+        relationship_type = relationship.get("Type", "")
+        if relationship_type.endswith("/manifest"):
+            relationship.set("Id", "RManifest")
+        elif relationship_type.endswith("/metadata/core-properties"):
+            relationship.set("Id", "RCoreProperties")
+            relationship.set("Target", f"/{CORE_PROPERTIES_PATH}")
+    entries["_rels/.rels"] = ET.tostring(
+        relationships, encoding="utf-8", xml_declaration=True
+    )
+
+    temporary = package_path.with_suffix(package_path.suffix + ".normalized")
+    with zipfile.ZipFile(temporary, "w", compression=zipfile.ZIP_STORED) as target:
+        for name in sorted(entries):
+            info = zipfile.ZipInfo(name, date_time=zip_timestamp)
+            info.compress_type = zipfile.ZIP_STORED
+            info.create_system = 3
+            info.external_attr = 0o100644 << 16
+            target.writestr(info, entries[name])
+    temporary.replace(package_path)
+
+
+def command_provenance(args) -> None:
+    versions = ET.parse(pathlib.Path(args.root) / "eng" / "Versions.props")
+
+    def version_property(name: str) -> str:
+        element = versions.find(f".//{name}")
+        if element is None or not element.text:
+            fail(f"Missing central release property: {name}")
+        return element.text.strip()
+
+    provenance = {
+        "schemaVersion": 1,
+        "version": args.version,
+        "commit": args.commit,
+        "treeState": args.tree_state,
+        "buildConfiguration": "Release",
+        "sourceDateEpoch": int(args.source_date_epoch),
+        "dotnetSdk": args.dotnet_sdk,
+        "buildTools": sorted(args.build_tool),
+        "containerImage": f"git.finalfactory.de/heikyu/rendezvous:{args.version}",
+        "containerPlatform": "linux/amd64",
+        "containerBaseDigests": args.base_digest,
+        "releaseBuilderBaseDigests": args.builder_base,
+        "packages": [
+            f"FinalFactory.Rendezvous.Client/{args.version}",
+            f"FinalFactory.Rendezvous.Contracts/{args.version}",
+        ],
+        "compatibility": {
+            "minimumClientVersion": version_property("MinimumClientVersion"),
+            "maximumClientMajorVersion": int(version_property("MaximumClientMajorVersion")),
+            "httpContractVersions": [int(version_property("HttpContractVersion"))],
+            "udpContractVersions": [int(version_property("UdpContractVersion"))],
+            "connectionTicketFormatVersions": [
+                int(version_property("ConnectionTicketFormatVersion"))
+            ],
+            "liteNetLib": version_property("LiteNetLibVersion"),
+            "gameplayProtocol": "exact-per-tenant",
+        },
+    }
+    pathlib.Path(args.output).write_text(
+        json.dumps(provenance, indent=2) + "\n", encoding="utf-8"
+    )
+
+
+def command_record_container_build(args) -> None:
+    path = pathlib.Path(args.provenance)
+    provenance = load_json(path)
+    tools = set(provenance.get("buildTools", []))
+    tools.add(f"docker-buildx={args.buildx_version}")
+    tools.add(f"buildkit={args.buildkit_version}")
+    provenance["buildTools"] = sorted(tools)
+    provenance["containerPlatform"] = "linux/amd64"
+    if not re.fullmatch(r"sha256:[0-9a-f]{64}", args.image_id):
+        fail(f"Container image ID is invalid: {args.image_id}")
+    provenance["containerImageId"] = args.image_id
+    path.write_text(json.dumps(provenance, indent=2) + "\n", encoding="utf-8")
+
+
+def command_record_container_digest(args) -> None:
+    if not re.fullmatch(
+        r"git\.finalfactory\.de/heikyu/rendezvous@sha256:[0-9a-f]{64}",
+        args.digest,
+    ):
+        fail(f"Published container digest is invalid: {args.digest}")
+    release_dir = pathlib.Path(args.release_dir)
+    provenance_path = release_dir / "release-provenance.json"
+    provenance = load_json(provenance_path)
+    provenance["containerDigest"] = args.digest
+    provenance_path.write_text(
+        json.dumps(provenance, indent=2) + "\n", encoding="utf-8"
+    )
+    (release_dir / "container-digest.txt").write_text(
+        args.digest + "\n", encoding="utf-8"
+    )
+
+
+def command_normalize_container_sbom(args) -> None:
+    path = pathlib.Path(args.file)
+    document = load_json(path)
+    created = dt.datetime.fromtimestamp(
+        int(args.source_date_epoch), dt.timezone.utc
+    ).strftime("%Y-%m-%dT%H:%M:%SZ")
+    document["name"] = f"FinalFactory.Rendezvous.Container-{args.version}"
+    document["documentNamespace"] = (
+        "https://git.finalfactory.de/HeiKyu/Rendezvous/container-sbom/"
+        f"{args.version}/{args.commit}"
+    )
+    creation = document.setdefault("creationInfo", {})
+    creation["created"] = created
+    creation["creators"] = ["Tool: Trivy-0.69.3"]
+    if isinstance(document.get("packages"), list):
+        document["packages"] = sorted(
+            document["packages"],
+            key=lambda item: (
+                item.get("SPDXID", ""),
+                item.get("name", ""),
+                item.get("versionInfo", ""),
+            ),
+        )
+    if isinstance(document.get("relationships"), list):
+        document["relationships"] = sorted(
+            document["relationships"],
+            key=lambda item: (
+                item.get("spdxElementId", ""),
+                item.get("relationshipType", ""),
+                item.get("relatedSpdxElement", ""),
+            ),
+        )
+    path.write_text(
+        json.dumps(document, indent=2, sort_keys=True) + "\n", encoding="utf-8"
+    )
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    subparsers = parser.add_subparsers(dest="command", required=True)
+    policy = subparsers.add_parser("policy")
+    policy.add_argument("--root", required=True)
+    policy.set_defaults(handler=command_policy)
+    audit = subparsers.add_parser("audit")
+    audit.add_argument("--input", required=True)
+    audit.set_defaults(handler=command_audit)
+    sbom = subparsers.add_parser("sbom")
+    sbom.add_argument("--root", required=True)
+    sbom.add_argument("--version", required=True)
+    sbom.add_argument("--commit", required=True)
+    sbom.add_argument("--source-date-epoch", required=True)
+    sbom.add_argument("--server-deps", required=True)
+    sbom.add_argument("--output", required=True)
+    sbom.set_defaults(handler=command_sbom)
+    verify = subparsers.add_parser("verify")
+    verify.add_argument("--root", required=True)
+    verify.add_argument("--release-dir", required=True)
+    verify.add_argument("--version", required=True)
+    verify.add_argument("--allow-dirty", action="store_true")
+    verify.add_argument(
+        "--phase",
+        choices=("build", "publish-ready", "signing-ready", "published"),
+        default="build",
+    )
+    verify.set_defaults(handler=command_verify)
+    consumer = subparsers.add_parser("consumer")
+    consumer.add_argument("--assets", required=True)
+    consumer.add_argument("--version", required=True)
+    consumer.set_defaults(handler=command_consumer)
+    consumer_config = subparsers.add_parser("consumer-config")
+    consumer_config.add_argument("--local-source", required=True)
+    consumer_config.add_argument("--output", required=True)
+    consumer_config.set_defaults(handler=command_consumer_config)
+    source_link = subparsers.add_parser("source-link")
+    source_link.add_argument("--file", required=True)
+    source_link.add_argument("--commit", required=True)
+    source_link.set_defaults(handler=command_source_link)
+    normalize = subparsers.add_parser("normalize-package")
+    normalize.add_argument("--package", required=True)
+    normalize.add_argument("--source-date-epoch", required=True)
+    normalize.add_argument("--version", required=True)
+    normalize.set_defaults(handler=command_normalize_package)
+    provenance = subparsers.add_parser("provenance")
+    provenance.add_argument("--root", required=True)
+    provenance.add_argument("--version", required=True)
+    provenance.add_argument("--commit", required=True)
+    provenance.add_argument("--tree-state", required=True)
+    provenance.add_argument("--source-date-epoch", required=True)
+    provenance.add_argument("--dotnet-sdk", required=True)
+    provenance.add_argument("--build-tool", action="append", default=[])
+    provenance.add_argument("--base-digest", action="append", default=[])
+    provenance.add_argument("--builder-base", action="append", default=[])
+    provenance.add_argument("--output", required=True)
+    provenance.set_defaults(handler=command_provenance)
+    record_container = subparsers.add_parser("record-container-build")
+    record_container.add_argument("--provenance", required=True)
+    record_container.add_argument("--buildx-version", required=True)
+    record_container.add_argument("--buildkit-version", required=True)
+    record_container.add_argument("--image-id", required=True)
+    record_container.set_defaults(handler=command_record_container_build)
+    record_digest = subparsers.add_parser("record-container-digest")
+    record_digest.add_argument("--release-dir", required=True)
+    record_digest.add_argument("--digest", required=True)
+    record_digest.set_defaults(handler=command_record_container_digest)
+    normalize_container_sbom = subparsers.add_parser("normalize-container-sbom")
+    normalize_container_sbom.add_argument("--file", required=True)
+    normalize_container_sbom.add_argument("--version", required=True)
+    normalize_container_sbom.add_argument("--commit", required=True)
+    normalize_container_sbom.add_argument("--source-date-epoch", required=True)
+    normalize_container_sbom.set_defaults(handler=command_normalize_container_sbom)
+    args = parser.parse_args()
+    args.handler(args)
+
+
+if __name__ == "__main__":
+    main()

scripts/build-release.sh

@@ -0,0 +1,253 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+version="${1:-}"
+output="${2:-}"
+
+property() {
+  sed -n "s:.*<$1>\(.*\)</$1>.*:\1:p" "$root/eng/Versions.props"
+}
+
+if [[ -z "$version" ]]; then
+  version="$(property RendezvousVersion)"
+fi
+semver='^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-([0-9A-Za-z-]+\.)*[0-9A-Za-z-]+)?(\+([0-9A-Za-z-]+\.)*[0-9A-Za-z-]+)?$'
+if [[ ! "$version" =~ $semver ]]; then
+  echo "Release version is not valid SemVer: $version" >&2
+  exit 1
+fi
+prerelease="${version%%+*}"
+if [[ "$prerelease" == *-* ]]; then
+  prerelease="${prerelease#*-}"
+  IFS='.' read -r -a prerelease_identifiers <<<"$prerelease"
+  for identifier in "${prerelease_identifiers[@]}"; do
+    if [[ "$identifier" =~ ^[0-9]+$ && ! "$identifier" =~ ^(0|[1-9][0-9]*)$ ]]; then
+      echo "Numeric prerelease identifiers must not contain leading zeroes: $version" >&2
+      exit 1
+    fi
+  done
+fi
+if [[ "$version" != "$(property RendezvousVersion)" ]]; then
+  echo "Requested version $version differs from eng/Versions.props." >&2
+  exit 1
+fi
+
+for command in dotnet git python3 tar gzip sha256sum cmp jq; do
+  command -v "$command" >/dev/null || {
+    echo "Required release command is unavailable: $command" >&2
+    exit 1
+  }
+done
+
+commit="$(git -C "$root" rev-parse HEAD)"
+source_date_epoch="$(git -C "$root" show -s --format=%ct "$commit")"
+tree_state=clean
+if [[ -n "$(git -C "$root" status --porcelain --untracked-files=normal)" ]]; then
+  tree_state=dirty
+fi
+allow_dirty=()
+if [[ "$tree_state" != clean ]]; then
+  if [[ "${RENDEZVOUS_RELEASE_ALLOW_DIRTY:-0}" != 1 ]]; then
+    echo "A formal release must be built from a clean Git tree." >&2
+    exit 1
+  fi
+  allow_dirty=(--allow-dirty)
+fi
+
+if [[ -z "$output" ]]; then
+  output="$root/artifacts/release/$version"
+fi
+if [[ -e "$output" ]]; then
+  echo "Release output already exists; refusing to overwrite: $output" >&2
+  exit 1
+fi
+mkdir -p "$(dirname "$output")"
+output="$(cd "$(dirname "$output")" && pwd)/$(basename "$output")"
+
+work="$(mktemp -d "${TMPDIR:-/tmp}/rendezvous-release.XXXXXX")"
+cleanup() {
+  rm -rf "$work"
+}
+trap cleanup EXIT
+mkdir -p "$work/pack-1" "$work/pack-2" "$work/publish-1" "$work/publish-2" "$output"
+
+create_server_archive() {
+  local publish_directory="$1"
+  local destination="$2"
+  tar --sort=name \
+    --mtime="@$source_date_epoch" \
+    --owner=0 --group=0 --numeric-owner \
+    -C "$publish_directory" -cf - . \
+    | gzip -n >"$destination"
+}
+
+common=(
+  -p:ContinuousIntegrationBuild=true
+  -p:PackageVersion="$version"
+  -p:RepositoryCommit="$commit"
+  -p:SourceRevisionId="$commit"
+)
+
+cd "$root"
+dotnet restore Rendezvous.slnx --locked-mode
+python3 eng/release_artifacts.py policy --root "$root" >"$work/dependency-policy.json"
+dotnet package list \
+  --project Rendezvous.slnx \
+  --vulnerable \
+  --include-transitive \
+  --no-restore \
+  --format json >"$work/nuget-vulnerabilities.json"
+python3 eng/release_artifacts.py audit --input "$work/nuget-vulnerabilities.json"
+dotnet format Rendezvous.slnx --verify-no-changes --no-restore
+api_before="$(sha256sum docs/api/*.json)"
+dotnet build Rendezvous.slnx --configuration Release --no-restore "${common[@]}"
+cp src/FinalFactory.Rendezvous.Server/bin/Release/net10.0/FinalFactory.Rendezvous.Server.dll \
+  "$work/FinalFactory.Rendezvous.Server.first.dll"
+cp src/FinalFactory.Rendezvous.Server/bin/Release/net10.0/FinalFactory.Rendezvous.Server.pdb \
+  "$work/FinalFactory.Rendezvous.Server.first.pdb"
+dotnet publish src/FinalFactory.Rendezvous.Server/FinalFactory.Rendezvous.Server.csproj \
+  --configuration Release \
+  --no-build \
+  --no-restore \
+  --output "$work/publish-1" \
+  -p:UseAppHost=false \
+  -p:OpenApiGenerateDocuments=false \
+  "${common[@]}"
+create_server_archive "$work/publish-1" "$work/FinalFactory.Rendezvous.Server.first.tar.gz"
+if [[ "$tree_state" == clean ]]; then
+  git diff --exit-code -- docs/api
+elif [[ "$api_before" != "$(sha256sum docs/api/*.json)" ]]; then
+  echo "Generated OpenAPI changed during the release build." >&2
+  exit 1
+fi
+dotnet test Rendezvous.slnx --configuration Release --no-build
+
+for project in Client Contracts; do
+  dotnet pack "src/FinalFactory.Rendezvous.$project/FinalFactory.Rendezvous.$project.csproj" \
+    --configuration Release --no-build --output "$work/pack-1" "${common[@]}"
+done
+for package in "$work/pack-1"/*; do
+  python3 eng/release_artifacts.py normalize-package \
+    --package "$package" \
+    --source-date-epoch "$source_date_epoch" \
+    --version "$version"
+done
+
+# Rebuild from the locked graph and prove package byte reproducibility.
+dotnet clean Rendezvous.slnx --configuration Release >/dev/null
+dotnet restore Rendezvous.slnx --locked-mode
+dotnet build Rendezvous.slnx --configuration Release --no-restore "${common[@]}"
+for project in Client Contracts; do
+  python3 eng/release_artifacts.py source-link \
+    --file "src/FinalFactory.Rendezvous.$project/obj/Release/netstandard2.1/FinalFactory.Rendezvous.$project.sourcelink.json" \
+    --commit "$commit"
+done
+cmp --silent \
+  "$work/FinalFactory.Rendezvous.Server.first.dll" \
+  src/FinalFactory.Rendezvous.Server/bin/Release/net10.0/FinalFactory.Rendezvous.Server.dll || {
+  echo "Server assembly is not byte reproducible." >&2
+  exit 1
+}
+cmp --silent \
+  "$work/FinalFactory.Rendezvous.Server.first.pdb" \
+  src/FinalFactory.Rendezvous.Server/bin/Release/net10.0/FinalFactory.Rendezvous.Server.pdb || {
+  echo "Server portable PDB is not byte reproducible." >&2
+  exit 1
+}
+for project in Client Contracts; do
+  dotnet pack "src/FinalFactory.Rendezvous.$project/FinalFactory.Rendezvous.$project.csproj" \
+    --configuration Release --no-build --output "$work/pack-2" "${common[@]}"
+done
+for package in "$work/pack-2"/*; do
+  python3 eng/release_artifacts.py normalize-package \
+    --package "$package" \
+    --source-date-epoch "$source_date_epoch" \
+    --version "$version"
+done
+for package in "$work/pack-1"/*; do
+  cmp --silent "$package" "$work/pack-2/$(basename "$package")" || {
+    echo "Package is not byte reproducible: $(basename "$package")" >&2
+    exit 1
+  }
+done
+cp "$work/pack-1"/* "$output/"
+
+python3 eng/release_artifacts.py consumer-config \
+  --local-source "$output" \
+  --output "$work/consumer.NuGet.config"
+for consumer in spacegame unscouted; do
+  project="$root/tests/consumers/$consumer/$(find "$root/tests/consumers/$consumer" -maxdepth 1 -name '*.csproj' -printf '%f\n')"
+  packages="$work/consumer-packages-$consumer"
+  dotnet restore "$project" \
+    -p:RendezvousPackageVersion="$version" \
+    -p:RestoreLockedMode=false \
+    --packages "$packages" \
+    --configfile "$work/consumer.NuGet.config" \
+    --force-evaluate
+  dotnet build "$project" \
+    --configuration Release --no-restore \
+    -p:RendezvousPackageVersion="$version"
+  assets="$(dirname "$project")/obj/project.assets.json"
+  python3 eng/release_artifacts.py consumer --assets "$assets" --version "$version"
+done
+
+dotnet publish src/FinalFactory.Rendezvous.Server/FinalFactory.Rendezvous.Server.csproj \
+  --configuration Release \
+  --no-build \
+  --no-restore \
+  --output "$work/publish-2" \
+  -p:UseAppHost=false \
+  -p:OpenApiGenerateDocuments=false \
+  "${common[@]}"
+server_archive="$output/FinalFactory.Rendezvous.Server.$version.linux-x64.tar.gz"
+create_server_archive "$work/publish-2" "$server_archive"
+cmp --silent "$work/FinalFactory.Rendezvous.Server.first.tar.gz" "$server_archive" || {
+  echo "Server archive is not byte reproducible." >&2
+  exit 1
+}
+
+cp CHANGELOG.md "$output/CHANGELOG.md"
+python3 eng/release_artifacts.py sbom \
+  --root "$root" \
+  --version "$version" \
+  --commit "$commit" \
+  --source-date-epoch "$source_date_epoch" \
+  --server-deps "$work/publish-2/FinalFactory.Rendezvous.Server.deps.json" \
+  --output "$output/FinalFactory.Rendezvous.$version.spdx.json"
+
+provenance=(
+  provenance
+  --root "$root"
+  --version "$version"
+  --commit "$commit"
+  --tree-state "$tree_state"
+  --source-date-epoch "$source_date_epoch"
+  --dotnet-sdk "$(dotnet --version)"
+  --build-tool "python=$(python3 --version 2>&1)"
+  --build-tool "tar=$(tar --version | sed -n '1p')"
+  --build-tool "gzip=$(gzip --version | sed -n '1p')"
+  --build-tool "jq=$(jq --version)"
+  --output "$output/release-provenance.json"
+)
+while IFS= read -r base; do
+  provenance+=(--base-digest "$base")
+done < <(sed -n 's/^FROM \([^ ]*\).*/\1/p' Dockerfile)
+while IFS= read -r base; do
+  provenance+=(--builder-base "$base")
+done < <(sed -n 's/^FROM \([^ ]*\).*/\1/p' eng/release-builder.Dockerfile)
+python3 eng/release_artifacts.py "${provenance[@]}"
+
+(
+  cd "$output"
+  find . -maxdepth 1 -type f ! -name checksums.sha256 -printf '%f\n' \
+    | LC_ALL=C sort \
+    | xargs sha256sum >checksums.sha256
+)
+python3 eng/release_artifacts.py verify \
+  --root "$root" \
+  --release-dir "$output" \
+  --version "$version" \
+  "${allow_dirty[@]}"
+
+echo "Release artifacts verified at $output"

scripts/check-compatibility.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+base="${1:-origin/main}"
+
+if ! git -C "$root" cat-file -e "$base^{commit}" 2>/dev/null; then
+  echo "Compatibility base does not exist; this is valid only for the initial version baseline: $base"
+  exit 0
+fi
+if [[ "$(git -C "$root" rev-parse "$base")" == "$(git -C "$root" rev-parse HEAD)" ]]; then
+  base="HEAD^"
+fi
+if ! git -C "$root" cat-file -e "$base:eng/Versions.props" 2>/dev/null; then
+  echo "Base has no release version manifest; accepting the initial compatibility baseline."
+  exit 0
+fi
+
+current_property() {
+  sed -n "s:.*<$1>\(.*\)</$1>.*:\1:p" "$root/eng/Versions.props"
+}
+base_property() {
+  git -C "$root" show "$base:eng/Versions.props" \
+    | sed -n "s:.*<$1>\(.*\)</$1>.*:\1:p"
+}
+changed() {
+  git -C "$root" diff --name-only "$base"...HEAD -- "$@" | grep -q .
+}
+require_increase() {
+  local property="$1"
+  local description="$2"
+  shift 2
+  if changed "$@"; then
+    local before after
+    before="$(base_property "$property")"
+    after="$(current_property "$property")"
+    if [[ ! "$before" =~ ^[0-9]+$ || ! "$after" =~ ^[0-9]+$ || "$after" -le "$before" ]]; then
+      echo "$description changed without increasing $property ($before -> $after)." >&2
+      exit 1
+    fi
+  fi
+}
+
+require_increase RendezvousMajorVersion "Published .NET API snapshot" \
+  'tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v*/client-public-api.txt' \
+  'tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v*/contracts-public-api.txt'
+require_increase HttpContractVersion "HTTP/OpenAPI contract evidence" \
+  'docs/api/*.json' \
+  'tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v*/*.json' \
+  ':(exclude)tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v*/connection-ticket.json'
+require_increase UdpContractVersion "UDP contract evidence" \
+  'tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v*/*.hex'
+require_increase ConnectionTicketFormatVersion "Connection-ticket format evidence" \
+  'tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v*/connection-ticket.json'
+
+echo "Compatibility changes are paired with the required version increase."

scripts/check-release-tag.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+tag="${1:-${GITHUB_REF_NAME:-}}"
+version="$(sed -n 's:.*<RendezvousVersion>\(.*\)</RendezvousVersion>.*:\1:p' "$root/eng/Versions.props")"
+
+if [[ "$tag" != "v$version" ]]; then
+  echo "Release tag $tag does not match central version v$version." >&2
+  exit 1
+fi
+if [[ -n "$(git -C "$root" status --porcelain --untracked-files=normal)" ]]; then
+  echo "Release tag checkout is not clean." >&2
+  exit 1
+fi
+if [[ "$(git -C "$root" tag --points-at HEAD --list "$tag")" != "$tag" ]]; then
+  echo "Release tag $tag does not point at the checked-out commit." >&2
+  exit 1
+fi
+if ! grep -Eq "^## $version - [0-9]{4}-[0-9]{2}-[0-9]{2}$" "$root/CHANGELOG.md"; then
+  echo "CHANGELOG.md must contain a dated heading for $version." >&2
+  exit 1
+fi
+if grep -Eq "^## $version - Unreleased$" "$root/CHANGELOG.md"; then
+  echo "Release $version is still marked Unreleased." >&2
+  exit 1
+fi

scripts/finalize-release-candidate.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+version="${1:?usage: finalize-release-candidate.sh VERSION RELEASE_DIRECTORY}"
+release_dir="${2:?usage: finalize-release-candidate.sh VERSION RELEASE_DIRECTORY}"
+container_sbom="$release_dir/FinalFactory.Rendezvous.Container.$version.spdx.json"
+
+[[ -s "$container_sbom" ]] || {
+  echo "Container SBOM is missing or empty: $container_sbom" >&2
+  exit 1
+}
+
+(
+  cd "$release_dir"
+  find . -maxdepth 1 -type f ! -name checksums.sha256 -printf '%f\n' \
+    | LC_ALL=C sort \
+    | xargs sha256sum >checksums.sha256
+)
+python3 "$root/eng/release_artifacts.py" verify \
+  --root "$root" \
+  --release-dir "$release_dir" \
+  --version "$version" \
+  --phase publish-ready
+
+echo "Finalized publish-ready release candidate $version"

scripts/finalize-signing-ready-release.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+version="${1:?usage: finalize-signing-ready-release.sh VERSION RELEASE_DIRECTORY}"
+release_dir="${2:?usage: finalize-signing-ready-release.sh VERSION RELEASE_DIRECTORY}"
+
+(
+  cd "$release_dir"
+  find . -maxdepth 1 -type f \
+    ! -name checksums.sha256 \
+    ! -name checksums.sha256.bundle \
+    -printf '%f\n' \
+    | LC_ALL=C sort \
+    | xargs sha256sum >checksums.sha256
+)
+python3 "$root/eng/release_artifacts.py" verify \
+  --root "$root" \
+  --release-dir "$release_dir" \
+  --version "$version" \
+  --phase signing-ready
+
+echo "Finalized signing-ready release $version"

scripts/publish-release.sh

@@ -0,0 +1,153 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+version="${1:?usage: publish-release.sh VERSION RELEASE_DIRECTORY}"
+release_dir="${2:?usage: publish-release.sh VERSION RELEASE_DIRECTORY}"
+api="${RENDEZVOUS_GITEA_API:-https://git.finalfactory.de/api/v1}"
+registry="${RENDEZVOUS_CONTAINER_REGISTRY:-git.finalfactory.de}"
+image="$registry/heikyu/rendezvous:$version"
+token="${RENDEZVOUS_RELEASE_TOKEN:?RENDEZVOUS_RELEASE_TOKEN is required}"
+username="${RENDEZVOUS_RELEASE_USERNAME:?RENDEZVOUS_RELEASE_USERNAME is required}"
+release_builder="${RENDEZVOUS_RELEASE_BUILDER:?RENDEZVOUS_RELEASE_BUILDER is required}"
+docker_config="$(mktemp -d)"
+curl_config="$(mktemp)"
+release_request=""
+release_response=""
+cleanup() {
+  [[ -z "$release_request" ]] || rm -f "$release_request"
+  [[ -z "$release_response" ]] || rm -f "$release_response"
+  rm -f "$curl_config"
+  rm -rf "$docker_config"
+}
+trap cleanup EXIT
+chmod 0700 "$docker_config"
+chmod 0600 "$curl_config"
+printf 'header = "Authorization: token %s"\n' "$token" >"$curl_config"
+export DOCKER_CONFIG="$docker_config"
+
+for command in cosign curl docker dotnet jq; do
+  command -v "$command" >/dev/null || {
+    echo "Required publication command is unavailable: $command" >&2
+    exit 1
+  }
+done
+
+run_release_builder() {
+  docker run --rm \
+    --user "$(id -u):$(id -g)" \
+    --volume "$root:/source:ro" \
+    --volume "$release_dir:$release_dir" \
+    --workdir /source \
+    "$release_builder" "$@"
+}
+
+"$root/scripts/check-release-tag.sh" "v$version"
+"$root/scripts/verify-release.sh" "$version" "$release_dir" publish-ready
+
+require_absent() {
+  local description="$1"
+  local url="$2"
+  local status
+  status="$(curl --silent --show-error --output /dev/null --write-out '%{http_code}' \
+    --config "$curl_config" "$url")"
+  if [[ "$status" != 404 ]]; then
+    echo "$description must not exist before publication (HTTP $status)." >&2
+    exit 1
+  fi
+}
+
+# Gitea package versions are immutable. Require all destinations to be empty
+# before the first write so a tag can never become a silent partial rerun.
+require_absent "Client package $version" \
+  "$api/packages/HeiKyu/nuget/FinalFactory.Rendezvous.Client/$version"
+require_absent "Contracts package $version" \
+  "$api/packages/HeiKyu/nuget/FinalFactory.Rendezvous.Contracts/$version"
+require_absent "Container $version" \
+  "$api/packages/HeiKyu/container/rendezvous/$version"
+require_absent "Release v$version" \
+  "$api/repos/HeiKyu/Rendezvous/releases/tags/v$version"
+
+feed="https://git.finalfactory.de/api/packages/HeiKyu/nuget/index.json"
+for package in \
+  "$release_dir/FinalFactory.Rendezvous.Contracts.$version.nupkg" \
+  "$release_dir/FinalFactory.Rendezvous.Client.$version.nupkg"; do
+  dotnet nuget push "$package" \
+    --source "$feed" \
+    --api-key "$token" \
+    --timeout 300
+done
+
+printf '%s' "$token" | docker login "$registry" --username "$username" --password-stdin
+expected_image_id="$(jq -er '.containerImageId' "$release_dir/release-provenance.json")"
+current_image_id="$(docker image inspect --format '{{.Id}}' "$image")"
+if [[ "$current_image_id" != "$expected_image_id" ]]; then
+  echo "Local release tag changed after staging ($expected_image_id -> $current_image_id)." >&2
+  exit 1
+fi
+docker push "$image"
+digest_ref="$(docker inspect --format '{{index .RepoDigests 0}}' "$image")"
+if [[ ! "$digest_ref" =~ ^git\.finalfactory\.de/heikyu/rendezvous@sha256:[0-9a-f]{64}$ ]]; then
+  echo "Registry did not return an immutable Rendezvous image digest: $digest_ref" >&2
+  exit 1
+fi
+run_release_builder python3 eng/release_artifacts.py record-container-digest \
+  --release-dir "$release_dir" \
+  --digest "$digest_ref"
+cosign public-key --key env://COSIGN_PRIVATE_KEY >"$release_dir/cosign.pub"
+run_release_builder ./scripts/finalize-signing-ready-release.sh \
+  "$version" "$release_dir"
+
+cosign sign --yes --key env://COSIGN_PRIVATE_KEY "$digest_ref"
+cosign attest --yes \
+  --key env://COSIGN_PRIVATE_KEY \
+  --type https://finalfactory.de/rendezvous/release-provenance/v1 \
+  --predicate "$release_dir/release-provenance.json" \
+  "$digest_ref"
+cosign sign-blob --yes \
+  --key env://COSIGN_PRIVATE_KEY \
+  --bundle "$release_dir/checksums.sha256.bundle" \
+  "$release_dir/checksums.sha256"
+"$root/scripts/verify-release.sh" "$version" "$release_dir" published
+cosign verify --key "$release_dir/cosign.pub" "$digest_ref" >/dev/null
+cosign verify-attestation \
+  --key "$release_dir/cosign.pub" \
+  --type https://finalfactory.de/rendezvous/release-provenance/v1 \
+  "$digest_ref" >/dev/null
+cosign verify-blob \
+  --key "$release_dir/cosign.pub" \
+  --bundle "$release_dir/checksums.sha256.bundle" \
+  "$release_dir/checksums.sha256" >/dev/null
+
+release_request="$(mktemp)"
+release_response="$(mktemp)"
+prerelease=false
+if [[ "$version" == *-* ]]; then
+  prerelease=true
+fi
+jq -n \
+  --arg tag "v$version" \
+  --arg commit "${GITHUB_SHA:?GITHUB_SHA is required}" \
+  --arg digest "$digest_ref" \
+  --argjson prerelease "$prerelease" \
+  --rawfile changelog "$release_dir/CHANGELOG.md" \
+  '{tag_name:$tag,target_commitish:$commit,name:("Rendezvous " + $tag),body:($changelog + "\n\n## Immutable container\n\n`" + $digest + "`\n"),draft:false,prerelease:$prerelease}' \
+  >"$release_request"
+curl --fail --silent --show-error \
+  --request POST \
+  --config "$curl_config" \
+  --header 'Content-Type: application/json' \
+  --data-binary "@$release_request" \
+  "$api/repos/HeiKyu/Rendezvous/releases" >"$release_response"
+release_id="$(jq -er '.id' "$release_response")"
+
+for artifact in "$release_dir"/*; do
+  curl --fail --silent --show-error \
+    --request POST \
+    --config "$curl_config" \
+    --form "attachment=@$artifact" \
+    "$api/repos/HeiKyu/Rendezvous/releases/$release_id/assets?name=$(basename "$artifact")" \
+    >/dev/null
+done
+
+echo "Published immutable release v$version with container $digest_ref"

scripts/run-capacity-gate.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+PROFILE="${RENDEZVOUS_CAPACITY_PROFILE:-quick}"
+OUTPUT="${RENDEZVOUS_CAPACITY_OUTPUT:-$ROOT/artifacts/capacity/rendezvous-capacity-v2.json}"
+CPUSET="${RENDEZVOUS_CAPACITY_CPUSET:-}"
+PROJECT="$ROOT/tests/FinalFactory.Rendezvous.Capacity/FinalFactory.Rendezvous.Capacity.csproj"
+TESTS="$ROOT/tests/FinalFactory.Rendezvous.Tests/FinalFactory.Rendezvous.Tests.csproj"
+
+if [[ "$PROFILE" != quick && "$PROFILE" != candidate ]]; then
+    printf 'RENDEZVOUS_CAPACITY_PROFILE must be quick or candidate.\n' >&2
+    exit 2
+fi
+command -v dotnet >/dev/null || {
+    printf 'Missing required command: dotnet\n' >&2
+    exit 2
+}
+if [[ -n "$CPUSET" ]]; then
+    command -v taskset >/dev/null || {
+        printf 'taskset is required when RENDEZVOUS_CAPACITY_CPUSET is set.\n' >&2
+        exit 2
+    }
+fi
+
+cd "$ROOT"
+export RENDEZVOUS_EVIDENCE_COMMIT="$(git rev-parse HEAD)"
+if [[ -n "$(git status --porcelain)" ]]; then
+    export RENDEZVOUS_EVIDENCE_TREE_STATE=dirty
+else
+    export RENDEZVOUS_EVIDENCE_TREE_STATE=clean
+fi
+if [[ "$PROFILE" == candidate && "$RENDEZVOUS_EVIDENCE_TREE_STATE" != clean ]]; then
+    printf 'Candidate evidence requires a clean source tree.\n' >&2
+    exit 2
+fi
+export RENDEZVOUS_EVIDENCE_CPUSET="${CPUSET:-unrestricted}"
+export RENDEZVOUS_EVIDENCE_COMMAND="RENDEZVOUS_CAPACITY_PROFILE=$PROFILE RENDEZVOUS_CAPACITY_CPUSET=${CPUSET:-unrestricted} ./scripts/run-capacity-gate.sh"
+
+dotnet restore "$ROOT/Rendezvous.slnx" --locked-mode
+dotnet build "$ROOT/Rendezvous.slnx" --configuration Release --no-restore
+
+filter='FullyQualifiedName~TrackerCapacityFailsClosedWithoutGrowingAndAWindowResetRecovers|FullyQualifiedName~OptionalTrafficCannotConsumeTheLeaseOperationReserve|FullyQualifiedName~ConcurrentAbusiveBurstStaysBoundedAndCannotBlockCriticalHttp|FullyQualifiedName~HttpOverloadIsTypedAndOversizedBodiesAreRejectedBeforeDispatch|FullyQualifiedName~WallClockMovementDoesNotExpireOrExtendLease|FullyQualifiedName~RepeatedMutableDeadlineRefreshesKeepOneScheduledEntryPerKey|FullyQualifiedName~RepeatedPrincipalRevocationCanExtendButCannotShortenProtection|FullyQualifiedName~RestartHasNewGenerationAndNoEphemeralState|FullyQualifiedName~RestartReturnsTypedUnavailabilityThenAllowsHostReregistration|FullyQualifiedName~DrainRejectsNewWorkAllowsInflightCompletionThenClearsState|FullyQualifiedName~UnavailableStoreFailsNewAuthorizationClosedAndErasesActiveState|FullyQualifiedName~KeyRotationHonorsOverlapAndRejectsRetiredKeys|FullyQualifiedName~OperatorSurfaceSeparatesAuthenticationConfirmsActionsAndRedactsInspection|FullyQualifiedName~SigtermDrainsThenReleasesHttpAndUdpSockets|FullyQualifiedName~ProductionTransportSoakKeepsHandlesMemoryAndSocketsBounded|FullyQualifiedName~NativeLiteNetLibRequestsIntroduceTheAuthorizedPair'
+dotnet test "$TESTS" --configuration Release --no-build --filter "$filter" \
+    --logger 'console;verbosity=minimal'
+
+mkdir -p "$(dirname "$OUTPUT")"
+arguments=(
+    dotnet run --project "$PROJECT" --configuration Release --no-build --
+    --profile "$PROFILE" --output "$OUTPUT"
+)
+if [[ -n "$CPUSET" ]]; then
+    taskset -c "$CPUSET" "${arguments[@]}"
+else
+    "${arguments[@]}"
+fi
+
+printf 'Capacity and resilience gate passed; evidence: %s\n' "$OUTPUT"

scripts/smoke-deployment.sh

@@ -0,0 +1,148 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+SERVICE_URL="${RENDEZVOUS_SMOKE_HTTP_URL:-http://127.0.0.1:8080/}"
+MEDIATOR="${RENDEZVOUS_SMOKE_UDP_ENDPOINT:-127.0.0.1:9050}"
+TIMEOUT_SECONDS="${RENDEZVOUS_SMOKE_TIMEOUT_SECONDS:-30}"
+LOCAL_KEY="${RENDEZVOUS_SMOKE_LOCAL_KEY:-$ROOT/deploy/compose/secrets/signing-key}"
+PROJECT="$ROOT/src/FinalFactory.Rendezvous.TestClient/FinalFactory.Rendezvous.TestClient.csproj"
+BUILD_CONFIGURATION="${RENDEZVOUS_SMOKE_CONFIGURATION:-Release}"
+GAME_ID="${RENDEZVOUS_SMOKE_GAME_ID:-space-game}"
+ENVIRONMENT_ID="${RENDEZVOUS_SMOKE_ENVIRONMENT_ID:-smoke}"
+REGION="${RENDEZVOUS_SMOKE_REGION:-local}"
+PROTOCOL_VERSION="${RENDEZVOUS_SMOKE_PROTOCOL_VERSION:-1}"
+
+for command in curl date dotnet jq mktemp od openssl tail tr wc; do
+    command -v "$command" >/dev/null || {
+        printf 'Missing required command: %s\n' "$command" >&2
+        exit 2
+    }
+done
+
+if [[ ! "$TIMEOUT_SECONDS" =~ ^[0-9]+$ ]] || (( TIMEOUT_SECONDS < 1 || TIMEOUT_SECONDS > 300 )); then
+    printf 'RENDEZVOUS_SMOKE_TIMEOUT_SECONDS must be an integer from 1 through 300.\n' >&2
+    exit 2
+fi
+if [[ ! "$PROTOCOL_VERSION" =~ ^[0-9]+$ ]] || (( PROTOCOL_VERSION < 1 )); then
+    printf 'RENDEZVOUS_SMOKE_PROTOCOL_VERSION must be a positive integer.\n' >&2
+    exit 2
+fi
+for scoped_value in "$GAME_ID" "$ENVIRONMENT_ID" "$REGION"; do
+    if [[ -z "$scoped_value" ]]; then
+        printf 'Smoke game, environment, and region values must not be empty.\n' >&2
+        exit 2
+    fi
+done
+
+base64url() {
+    openssl base64 -A | tr '+/' '-_' | tr -d '='
+}
+
+local_credential() {
+    if [[ ! -f "$LOCAL_KEY" ]] || [[ "$(wc -c < "$LOCAL_KEY")" -ne 32 ]]; then
+        printf 'Local Compose smoke key must be exactly 32 bytes: %s\n' "$LOCAL_KEY" >&2
+        exit 2
+    fi
+
+    local now expires nonce payload encoded signed hex signature
+    now="$(date +%s)"
+    expires="$((now + 600))"
+    nonce="$(openssl rand -hex 16)"
+    payload="$(jq -cn \
+        --arg issuer final-factory-rendezvous-smoke \
+        --arg audience rendezvous-service \
+        --arg subject local-smoke-host \
+        --arg kind dedicatedPublisher \
+        --arg gameId "$GAME_ID" \
+        --arg environmentId "$ENVIRONMENT_ID" \
+        --arg region "$REGION" \
+        --arg nonce "$nonce" \
+        --argjson now "$now" \
+        --argjson expires "$expires" \
+        '{version:1,issuer:$issuer,audience:$audience,subject:$subject,kind:$kind,gameId:$gameId,environmentId:$environmentId,regions:[$region],permissions:[],issuedAtUnixSeconds:$now,notBeforeUnixSeconds:$now,expiresAtUnixSeconds:$expires,nonce:$nonce}')"
+    encoded="$(printf '%s' "$payload" | base64url)"
+    signed="rv1.local-smoke-1.$encoded"
+    hex="$(od -An -v -tx1 "$LOCAL_KEY" | tr -d ' \n')"
+    signature="$(printf '%s' "$signed" \
+        | openssl dgst -sha256 -mac HMAC -macopt "hexkey:$hex" -binary \
+        | base64url)"
+    printf '%s.%s' "$signed" "$signature"
+}
+
+credential="${RENDEZVOUS_PUBLISHER_CREDENTIAL:-}"
+if [[ -z "$credential" ]]; then
+    credential="$(local_credential)"
+fi
+export RENDEZVOUS_PUBLISHER_CREDENTIAL="$credential"
+
+curl --fail --silent --show-error --max-time 5 "${SERVICE_URL%/}/health/live" >/dev/null
+curl --fail --silent --show-error --max-time 5 "${SERVICE_URL%/}/health/ready" >/dev/null
+
+temp_dir="$(mktemp -d)"
+host_log="$temp_dir/host.jsonl"
+join_log="$temp_dir/join.jsonl"
+host_pid=''
+cleanup() {
+    local status="$?"
+    if [[ -n "$host_pid" ]] && kill -0 "$host_pid" 2>/dev/null; then
+        kill -TERM "$host_pid" 2>/dev/null || true
+        wait "$host_pid" 2>/dev/null || true
+    fi
+    if [[ "$status" -ne 0 ]]; then
+        printf 'Deployment smoke failed; sanitized diagnostic events follow.\n' >&2
+        [[ -f "$host_log" ]] && jq -c . "$host_log" >&2 || true
+        [[ -f "$join_log" ]] && jq -c . "$join_log" >&2 || true
+    fi
+    rm -rf "$temp_dir"
+    return "$status"
+}
+trap cleanup EXIT
+trap 'exit 130' INT
+trap 'exit 143' TERM
+
+dotnet run --project "$PROJECT" --configuration "$BUILD_CONFIGURATION" --no-build -- \
+    host --service "$SERVICE_URL" --mediator "$MEDIATOR" \
+    --game "$GAME_ID" --environment "$ENVIRONMENT_ID" --region "$REGION" --protocol "$PROTOCOL_VERSION" \
+    --script --json --exit-after-echo --timeout-seconds "$TIMEOUT_SECONDS" \
+    >"$host_log" 2>&1 &
+host_pid="$!"
+
+ready=false
+for ((iteration = 0; iteration < TIMEOUT_SECONDS * 4; iteration++)); do
+    if jq -e 'select(.event == "host.ready")' "$host_log" >/dev/null 2>&1; then
+        ready=true
+        break
+    fi
+    if ! kill -0 "$host_pid" 2>/dev/null; then
+        printf 'Host diagnostic stopped before it became ready.\n' >&2
+        jq -c . "$host_log" >&2 || true
+        exit 1
+    fi
+    sleep 0.25
+done
+if [[ "$ready" != true ]]; then
+    printf 'Host diagnostic did not become ready within %s seconds.\n' "$TIMEOUT_SECONDS" >&2
+    exit 1
+fi
+
+listing_id="$(jq -r 'select(.event == "host.registered") | .listingId' "$host_log" | tail -n 1)"
+if [[ -z "$listing_id" || "$listing_id" == null ]]; then
+    printf 'Host diagnostic did not report a listing ID.\n' >&2
+    exit 1
+fi
+
+dotnet run --project "$PROJECT" --configuration "$BUILD_CONFIGURATION" --no-build -- \
+    join --service "$SERVICE_URL" --mediator "$MEDIATOR" \
+    --game "$GAME_ID" --environment "$ENVIRONMENT_ID" --region "$REGION" --protocol "$PROTOCOL_VERSION" \
+    --listing "$listing_id" --script --json --timeout-seconds "$TIMEOUT_SECONDS" \
+    >"$join_log" 2>&1
+wait "$host_pid"
+host_pid=''
+
+jq -e 'select(.event == "host.direct-traffic" and .status == "verified")' "$host_log" >/dev/null
+jq -e 'select(.event == "host.deregistered" and .status == "complete")' "$host_log" >/dev/null
+jq -e 'select(.event == "join.direct-traffic" and .status == "verified")' "$join_log" >/dev/null
+jq -e 'select(.event == "join.outcome-report" and .status == "accepted")' "$join_log" >/dev/null
+
+printf 'Rendezvous deployment smoke passed: HTTP live/ready and authenticated UDP mediation/direct traffic.\n'

scripts/verify-real-consumers.sh

@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+version="${1:?usage: verify-real-consumers.sh VERSION RELEASE_DIRECTORY}"
+release_dir="${2:?usage: verify-real-consumers.sh VERSION RELEASE_DIRECTORY}"
+manifest="$root/eng/consumer-revisions.json"
+work="$(mktemp -d "${TMPDIR:-/tmp}/rendezvous-consumers.XXXXXX")"
+cleanup() {
+  rm -rf "$work"
+}
+trap cleanup EXIT
+
+for command in dotnet git jq python3; do
+  command -v "$command" >/dev/null || {
+    echo "Required consumer verification command is unavailable: $command" >&2
+    exit 1
+  }
+done
+
+python3 "$root/eng/release_artifacts.py" consumer-config \
+  --local-source "$release_dir" \
+  --output "$work/NuGet.config"
+
+count="$(jq '.consumers | length' "$manifest")"
+for ((index = 0; index < count; index++)); do
+  name="$(jq -r ".consumers[$index].name" "$manifest")"
+  repository="$(jq -r ".consumers[$index].repository" "$manifest")"
+  revision="$(jq -r ".consumers[$index].revision" "$manifest")"
+  project_relative="$(jq -r ".consumers[$index].project" "$manifest")"
+  checkout="$work/$name"
+  git -c init.defaultBranch=main init --quiet "$checkout"
+  git -C "$checkout" remote add origin "$repository"
+  git -C "$checkout" fetch --quiet --depth 1 origin "$revision"
+  GIT_LFS_SKIP_SMUDGE=1 git -C "$checkout" checkout --quiet --detach FETCH_HEAD
+  [[ "$(git -C "$checkout" rev-parse HEAD)" == "$revision" ]] || {
+    echo "$name did not resolve the pinned consumer revision." >&2
+    exit 1
+  }
+
+  project="$checkout/$project_relative"
+  [[ -f "$project" ]] || {
+    echo "$name consumer project does not exist at $project_relative." >&2
+    exit 1
+  }
+  targets="$work/$name.Rendezvous.Consumer.targets"
+  cat >"$targets" <<EOF
+<Project>
+  <ItemGroup Condition="'\$(MSBuildProjectFullPath)' == '$project'">
+    <PackageReference Include="FinalFactory.Rendezvous.Client" Version="[$version]" />
+    <PackageReference Include="FinalFactory.Rendezvous.Contracts" Version="[$version]" />
+  </ItemGroup>
+</Project>
+EOF
+  packages="$work/packages-$name"
+  dotnet restore "$project" \
+    -p:CustomAfterMicrosoftCommonTargets="$targets" \
+    -p:RestorePackagesWithLockFile=false \
+    -p:RestoreLockedMode=false \
+    --packages "$packages" \
+    --configfile "$work/NuGet.config" \
+    --force-evaluate
+  assets=""
+  while IFS= read -r candidate_assets; do
+    if grep -Fq "FinalFactory.Rendezvous.Client/$version" "$candidate_assets"; then
+      assets="$candidate_assets"
+      break
+    fi
+  done < <(find "$checkout" -path '*/obj/project.assets.json' -type f -print)
+  [[ -n "$assets" ]] || {
+    echo "$name restore did not produce assets for the injected Rendezvous references." >&2
+    exit 1
+  }
+  python3 "$root/eng/release_artifacts.py" consumer \
+    --assets "$assets" \
+    --version "$version"
+  echo "Verified $name at $revision can pin and restore Rendezvous $version."
+done

scripts/verify-release.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+version="${1:?usage: verify-release.sh VERSION [RELEASE_DIRECTORY] [PHASE]}"
+release_dir="${2:-$root/artifacts/release/$version}"
+phase="${3:-build}"
+
+python3 "$root/eng/release_artifacts.py" verify \
+  --root "$root" \
+  --release-dir "$release_dir" \
+  --version "$version" \
+  --phase "$phase"

src/FinalFactory.Rendezvous.Client/FinalFactory.Rendezvous.Client.csproj

@@ -7,10 +7,12 @@
     <PackageId>FinalFactory.Rendezvous.Client</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Description>Godot-independent client SDK for Final Factory Rendezvous.</Description>
+    <PackageTags>final-factory;multiplayer;nat;godot;litenetlib</PackageTags>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="../FinalFactory.Rendezvous.Contracts/FinalFactory.Rendezvous.Contracts.csproj" />
     <PackageReference Include="LiteNetLib" />
     <None Update="README.md" Pack="true" PackagePath="\" />
+    <None Include="../../CHANGELOG.md" Pack="true" PackagePath="\" Link="CHANGELOG.md" />
   </ItemGroup>
 </Project>

src/FinalFactory.Rendezvous.Client/packages.lock.json

@@ -4,7 +4,7 @@
     ".NETStandard,Version=v2.1": {
       "LiteNetLib": {
         "type": "Direct",
-        "requested": "[2.1.4, )",
+        "requested": "[2.1.4, 2.1.4]",
         "resolved": "2.1.4",
         "contentHash": "KWlxvMw3Urpqj9joD96LRiK+LC62pQNs/zkXRJc+rHnxgkGp+vV703xzDrxRmv+V1YhCFfIGzs5nrVWtREIlyA=="
       },

src/FinalFactory.Rendezvous.Contracts/FinalFactory.Rendezvous.Contracts.csproj

@@ -5,9 +5,13 @@
     <RootNamespace>FinalFactory.Rendezvous.Contracts</RootNamespace>
     <IsPackable>true</IsPackable>
     <PackageId>FinalFactory.Rendezvous.Contracts</PackageId>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <Description>Versioned transport-neutral contracts for Final Factory Rendezvous.</Description>
+    <PackageTags>final-factory;multiplayer;contracts;godot</PackageTags>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="System.Text.Json" />
+    <None Update="README.md" Pack="true" PackagePath="\" />
+    <None Include="../../CHANGELOG.md" Pack="true" PackagePath="\" Link="CHANGELOG.md" />
   </ItemGroup>
 </Project>

src/FinalFactory.Rendezvous.Contracts/README.md

@@ -0,0 +1,8 @@
+# FinalFactory.Rendezvous.Contracts
+
+Transport-neutral v1 HTTP/UDP contract types for Final Factory Rendezvous.
+The package targets `netstandard2.1`, contains no Godot or LiteNetLib dependency,
+and is versioned with the Client package and server release.
+
+Compatibility and migration policy is maintained in the repository's
+`docs/releases/README.md` document.

src/FinalFactory.Rendezvous.Server/Deployment/DeploymentOptions.cs

@@ -0,0 +1,235 @@
+using System.ComponentModel.DataAnnotations;
+using System.Net;
+using FinalFactory.Rendezvous.Server.Abuse;
+
+namespace FinalFactory.Rendezvous.Server.Deployment;
+
+internal sealed record DeploymentOptions
+{
+    public const string SectionName = "Rendezvous:Deployment";
+
+    [Required]
+    public string PublicHttpBaseUrl { get; init; } = string.Empty;
+
+    [Required]
+    public string PublicUdpHost { get; init; } = string.Empty;
+
+    [Range(1, 65_535)]
+    public int PublicUdpPort { get; init; } = 9050;
+
+    [Range(1, 30)]
+    public int DrainDeadlineSeconds { get; init; } = 30;
+
+    [Range(0, 5)]
+    public int MinimumDrainSeconds { get; init; } = 1;
+
+    public bool SingleActiveInstance { get; init; } = true;
+
+    public bool AllowPrivatePublicEndpoints { get; init; }
+
+    public IReadOnlyList<string> ValidateProduction(
+        AbuseProtectionOptions abuseProtection,
+        string? allowedHosts)
+    {
+        List<string> errors = [];
+        if (!SingleActiveInstance)
+        {
+            errors.Add("Rendezvous:Deployment:SingleActiveInstance must be true because ephemeral state is not shared between replicas.");
+        }
+
+        if (MinimumDrainSeconds >= DrainDeadlineSeconds)
+        {
+            errors.Add("Rendezvous:Deployment:MinimumDrainSeconds must be less than DrainDeadlineSeconds.");
+        }
+
+        if (DrainDeadlineSeconds is < 1 or > 30)
+        {
+            errors.Add("Rendezvous:Deployment:DrainDeadlineSeconds must be between 1 and 30.");
+        }
+
+        if (MinimumDrainSeconds is < 0 or > 5)
+        {
+            errors.Add("Rendezvous:Deployment:MinimumDrainSeconds must be between 0 and 5.");
+        }
+
+        if (PublicUdpPort is < 1 or > 65_535)
+        {
+            errors.Add("Rendezvous:Deployment:PublicUdpPort must be between 1 and 65535.");
+        }
+
+        ValidateHttpEndpoint(errors);
+        ValidateUdpEndpoint(errors);
+        ValidateAllowedHosts(errors, allowedHosts, PublicHttpBaseUrl);
+
+        if (abuseProtection.TrustedProxyAddresses is not { Length: > 0 })
+        {
+            errors.Add(
+                "Rendezvous:AbuseProtection:TrustedProxyAddresses must list the exact TLS proxy addresses; forwarded headers are rejected without this trust boundary.");
+        }
+
+        return errors;
+    }
+
+    private void ValidateHttpEndpoint(List<string> errors)
+    {
+        if (!Uri.TryCreate(PublicHttpBaseUrl, UriKind.Absolute, out Uri? endpoint)
+            || !string.Equals(endpoint.Scheme, Uri.UriSchemeHttps, StringComparison.Ordinal)
+            || !string.IsNullOrEmpty(endpoint.UserInfo)
+            || !string.IsNullOrEmpty(endpoint.Query)
+            || !string.IsNullOrEmpty(endpoint.Fragment)
+            || endpoint.AbsolutePath != "/")
+        {
+            errors.Add(
+                "Rendezvous:Deployment:PublicHttpBaseUrl must be an absolute HTTPS origin with no credentials, path, query, or fragment (for example, https://rendezvous.your-company.tld/).");
+            return;
+        }
+
+        if (!AllowPrivatePublicEndpoints && !IsPublicHost(endpoint.Host))
+        {
+            errors.Add(
+                "Rendezvous:Deployment:PublicHttpBaseUrl must use a public DNS name or address; set AllowPrivatePublicEndpoints=true only for an isolated deployment smoke test.");
+        }
+    }
+
+    private void ValidateUdpEndpoint(List<string> errors)
+    {
+        if (string.IsNullOrWhiteSpace(PublicUdpHost)
+            || PublicUdpHost.Contains("//", StringComparison.Ordinal)
+            || PublicUdpHost.Contains(':', StringComparison.Ordinal) && !IPAddress.TryParse(PublicUdpHost, out _)
+            || Uri.CheckHostName(PublicUdpHost) == UriHostNameType.Unknown)
+        {
+            errors.Add(
+                "Rendezvous:Deployment:PublicUdpHost must contain only the advertised DNS name or IP address; configure the port separately.");
+            return;
+        }
+
+        if (!AllowPrivatePublicEndpoints && !IsPublicHost(PublicUdpHost))
+        {
+            errors.Add(
+                "Rendezvous:Deployment:PublicUdpHost must use a public DNS name or address; set AllowPrivatePublicEndpoints=true only for an isolated deployment smoke test.");
+        }
+    }
+
+    private static void ValidateAllowedHosts(
+        List<string> errors,
+        string? allowedHosts,
+        string publicHttpBaseUrl)
+    {
+        string[] hosts = (allowedHosts ?? string.Empty).Split(
+            ';',
+            StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+        if (hosts.Length == 0 || hosts.Any(static host => host is "*" or "+"))
+        {
+            errors.Add(
+                "AllowedHosts must explicitly list the public HTTP host in production; wildcard or empty host filtering is unsafe.");
+            return;
+        }
+
+        if (Uri.TryCreate(publicHttpBaseUrl, UriKind.Absolute, out Uri? endpoint)
+            && !hosts.Contains(endpoint.Host, StringComparer.OrdinalIgnoreCase))
+        {
+            errors.Add(
+                "AllowedHosts must contain the exact host advertised by Rendezvous:Deployment:PublicHttpBaseUrl.");
+        }
+    }
+
+    private static bool IsPublicHost(string host)
+    {
+        if (!IPAddress.TryParse(host, out IPAddress? address))
+        {
+            return Uri.CheckHostName(host) == UriHostNameType.Dns
+                && host.Contains('.', StringComparison.Ordinal)
+                && !IsReservedDnsName(host);
+        }
+
+        return IsGloballyRoutableUnicast(address);
+    }
+
+    private static bool IsReservedDnsName(string host)
+    {
+        string normalized = host.TrimEnd('.');
+        string[] reservedSuffixes =
+        [
+            "localhost",
+            "local",
+            "invalid",
+            "test",
+            "example",
+            "example.com",
+            "example.net",
+            "example.org",
+            "home.arpa",
+            "alt",
+            "onion",
+        ];
+        return reservedSuffixes.Any(suffix =>
+            string.Equals(normalized, suffix, StringComparison.OrdinalIgnoreCase)
+            || normalized.EndsWith($".{suffix}", StringComparison.OrdinalIgnoreCase));
+    }
+
+    private static bool IsGloballyRoutableUnicast(IPAddress address)
+    {
+        if (address.IsIPv4MappedToIPv6)
+        {
+            address = address.MapToIPv4();
+        }
+
+        byte[] bytes = address.GetAddressBytes();
+        if (address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
+        {
+            return !(bytes[0] is 0 or 10 or 127
+                || bytes[0] == 100 && bytes[1] is >= 64 and <= 127
+                || bytes[0] == 169 && bytes[1] == 254
+                || bytes[0] == 172 && bytes[1] is >= 16 and <= 31
+                || bytes[0] == 192
+                    && (bytes[1] == 0 && bytes[2] is 0 or 2
+                        || bytes[1] == 88 && bytes[2] == 99
+                        || bytes[1] == 168)
+                || bytes[0] == 198
+                    && (bytes[1] is 18 or 19
+                        || bytes[1] == 51 && bytes[2] == 100)
+                || bytes[0] == 203 && bytes[1] == 0 && bytes[2] == 113
+                || bytes[0] >= 224);
+        }
+
+        return address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6
+            && !IPAddress.IsLoopback(address)
+            && !address.Equals(IPAddress.IPv6Any)
+            && !address.IsIPv6LinkLocal
+            && !address.IsIPv6SiteLocal
+            && !address.IsIPv6Multicast
+            && (bytes[0] & 0xe0) == 0x20
+            && !HasPrefix(bytes, [0x20, 0x01, 0x00], 23)
+            && !HasPrefix(bytes, [0x20, 0x01, 0x0d, 0xb8], 32)
+            && !HasPrefix(bytes, [0x20, 0x02], 16)
+            && !HasPrefix(bytes, [0x3f, 0xff, 0x00], 20);
+    }
+
+    private static bool HasPrefix(byte[] address, byte[] prefix, int bitCount)
+    {
+        int fullBytes = bitCount / 8;
+        for (int index = 0; index < fullBytes; index++)
+        {
+            if (address[index] != prefix[index])
+            {
+                return false;
+            }
+        }
+
+        int remainingBits = bitCount % 8;
+        if (remainingBits == 0)
+        {
+            return true;
+        }
+
+        int mask = 0xff << (8 - remainingBits);
+        return (address[fullBytes] & mask) == (prefix[fullBytes] & mask);
+    }
+}
+
+internal sealed class DeploymentConfigurationException(IReadOnlyList<string> errors)
+    : InvalidOperationException(
+        "Production deployment configuration is invalid:" + Environment.NewLine
+        + string.Join(Environment.NewLine, errors.Select(static error => $"- {error}")))
+{
+}

src/FinalFactory.Rendezvous.Server/Deployment/GracefulDrainService.cs

@@ -0,0 +1,102 @@
+using System.Diagnostics;
+using FinalFactory.Rendezvous.Server.State;
+using Microsoft.Extensions.Options;
+
+namespace FinalFactory.Rendezvous.Server.Deployment;
+
+internal sealed class GracefulDrainService : IHostedService, IDisposable
+{
+    private static readonly TimeSpan PollInterval = TimeSpan.FromMilliseconds(50);
+    private readonly InMemoryEphemeralRendezvousStore _store;
+    private readonly IHostApplicationLifetime _lifetime;
+    private readonly DeploymentOptions _options;
+    private readonly ILogger<GracefulDrainService> _logger;
+    private readonly object _gate = new();
+    private CancellationTokenRegistration _stoppingRegistration;
+    private Task? _drainTask;
+
+    public GracefulDrainService(
+        InMemoryEphemeralRendezvousStore store,
+        IHostApplicationLifetime lifetime,
+        IOptions<DeploymentOptions> options,
+        ILogger<GracefulDrainService> logger)
+    {
+        _store = store;
+        _lifetime = lifetime;
+        _options = options.Value;
+        _logger = logger;
+    }
+
+    public Task StartAsync(CancellationToken cancellationToken)
+    {
+        cancellationToken.ThrowIfCancellationRequested();
+        _stoppingRegistration = _lifetime.ApplicationStopping.Register(
+            () => EnsureDrainAsync().GetAwaiter().GetResult());
+        return Task.CompletedTask;
+    }
+
+    public Task StopAsync(CancellationToken cancellationToken)
+    {
+        // ApplicationStopping callbacks run before hosted services and listeners
+        // stop. StopAsync is the idempotent fallback for directly driven hosts.
+        _ = cancellationToken;
+        return EnsureDrainAsync();
+    }
+
+    public void Dispose() => _stoppingRegistration.Dispose();
+
+    private Task EnsureDrainAsync()
+    {
+        lock (_gate)
+        {
+            return _drainTask ??= DrainAsync();
+        }
+    }
+
+    private async Task DrainAsync()
+    {
+        _store.BeginDrain(CancellationToken.None);
+        TimeSpan deadline = TimeSpan.FromSeconds(_options.DrainDeadlineSeconds);
+        TimeSpan minimum = TimeSpan.FromSeconds(_options.MinimumDrainSeconds);
+        long startedAt = Stopwatch.GetTimestamp();
+        LogDrainStarted(_logger, _options.DrainDeadlineSeconds);
+        try
+        {
+            while (Stopwatch.GetElapsedTime(startedAt) < deadline)
+            {
+                TimeSpan elapsed = Stopwatch.GetElapsedTime(startedAt);
+                if (elapsed >= minimum && _store.GetActiveJoinAttemptCountForDrain() == 0)
+                {
+                    break;
+                }
+
+                TimeSpan remaining = deadline - elapsed;
+                await Task.Delay(
+                    remaining < PollInterval ? remaining : PollInterval,
+                    CancellationToken.None).ConfigureAwait(false);
+            }
+        }
+        finally
+        {
+            _store.MarkUnavailable();
+            double elapsedMilliseconds = Stopwatch.GetElapsedTime(startedAt).TotalMilliseconds;
+            LogDrainFinished(_logger, elapsedMilliseconds);
+        }
+    }
+
+    private static readonly Action<ILogger, int, Exception?> DrainStarted = LoggerMessage.Define<int>(
+        LogLevel.Information,
+        new EventId(1, nameof(LogDrainStarted)),
+        "Graceful drain started with a {DrainDeadlineSeconds}-second deadline");
+
+    private static readonly Action<ILogger, double, Exception?> DrainFinished = LoggerMessage.Define<double>(
+        LogLevel.Information,
+        new EventId(2, nameof(LogDrainFinished)),
+        "Graceful drain finished after {ElapsedMilliseconds:F0} ms; ephemeral state was cleared");
+
+    private static void LogDrainStarted(ILogger logger, int drainDeadlineSeconds) =>
+        DrainStarted(logger, drainDeadlineSeconds, null);
+
+    private static void LogDrainFinished(ILogger logger, double elapsedMilliseconds) =>
+        DrainFinished(logger, elapsedMilliseconds, null);
+}

src/FinalFactory.Rendezvous.Server/FinalFactory.Rendezvous.Server.csproj

@@ -3,6 +3,7 @@
     <TargetFramework>net10.0</TargetFramework>
     <AssemblyName>FinalFactory.Rendezvous.Server</AssemblyName>
     <RootNamespace>FinalFactory.Rendezvous.Server</RootNamespace>
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
     <IsPackable>false</IsPackable>
     <OpenApiGenerateDocuments>true</OpenApiGenerateDocuments>
     <OpenApiDocumentsDirectory>$(MSBuildProjectDirectory)/../../docs/api</OpenApiDocumentsDirectory>
@@ -14,4 +15,74 @@
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" />
     <PackageReference Include="Microsoft.Extensions.ApiDescription.Server" PrivateAssets="all" />
   </ItemGroup>
+  <ItemGroup>
+    <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
+      <_Parameter1>RendezvousMinimumClientVersion</_Parameter1>
+      <_Parameter2>$(MinimumClientVersion)</_Parameter2>
+    </AssemblyAttribute>
+    <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
+      <_Parameter1>RendezvousMaximumClientMajorVersion</_Parameter1>
+      <_Parameter2>$(MaximumClientMajorVersion)</_Parameter2>
+    </AssemblyAttribute>
+    <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
+      <_Parameter1>RendezvousUdpContractVersion</_Parameter1>
+      <_Parameter2>$(UdpContractVersion)</_Parameter2>
+    </AssemblyAttribute>
+    <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
+      <_Parameter1>RendezvousConnectionTicketFormatVersion</_Parameter1>
+      <_Parameter2>$(ConnectionTicketFormatVersion)</_Parameter2>
+    </AssemblyAttribute>
+    <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
+      <_Parameter1>RendezvousLiteNetLibMajorVersion</_Parameter1>
+      <_Parameter2>$(LiteNetLibMajorVersion)</_Parameter2>
+    </AssemblyAttribute>
+  </ItemGroup>
+  <ItemGroup>
+    <!-- Roslyn and source generators consume syntax trees in item order. Keep
+         this ordinal manifest explicit so clean builds are byte reproducible. -->
+    <Compile Include="Abuse/AbuseProtectionOptions.cs" />
+    <Compile Include="Abuse/AbuseProtectionService.cs" />
+    <Compile Include="Abuse/HttpAbuseProtectionMiddleware.cs" />
+    <Compile Include="Abuse/TrustedProxyForwarding.cs" />
+    <Compile Include="Browser/EphemeralCursorProtector.cs" />
+    <Compile Include="Browser/SessionBrowserCursorCodec.cs" />
+    <Compile Include="Browser/SessionBrowserService.cs" />
+    <Compile Include="ConnectionOutcomes/ConnectionOutcomeService.cs" />
+    <Compile Include="Deployment/DeploymentOptions.cs" />
+    <Compile Include="Deployment/GracefulDrainService.cs" />
+    <Compile Include="Http/ContractEndpoints.cs" />
+    <Compile Include="Http/RendezvousExceptionHandler.cs" />
+    <Compile Include="JoinAttempts/JoinAttemptCursorCodec.cs" />
+    <Compile Include="JoinAttempts/JoinAttemptService.cs" />
+    <Compile Include="Observability/AuditOptions.cs" />
+    <Compile Include="Observability/AuditTrail.cs" />
+    <Compile Include="Observability/HealthEndpoints.cs" />
+    <Compile Include="Observability/RendezvousReadiness.cs" />
+    <Compile Include="Observability/RendezvousTelemetry.cs" />
+    <Compile Include="Observability/TelemetryMiddleware.cs" />
+    <Compile Include="Operations/OperatorEndpoints.cs" />
+    <Compile Include="Operations/OperatorModels.cs" />
+    <Compile Include="Operations/OperatorService.cs" />
+    <Compile Include="Operations/ReleaseCompatibility.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties/AssemblyInfo.cs" />
+    <Compile Include="Provisioning/GamePolicy.cs" />
+    <Compile Include="Provisioning/GamePolicyRegistry.cs" />
+    <Compile Include="Provisioning/PrincipalCredentialService.cs" />
+    <Compile Include="Provisioning/Principals.cs" />
+    <Compile Include="Provisioning/ProvisioningOptions.cs" />
+    <Compile Include="Provisioning/ProvisioningRuntime.cs" />
+    <Compile Include="Provisioning/PublisherAuthorizationService.cs" />
+    <Compile Include="Provisioning/SecretProviders.cs" />
+    <Compile Include="Provisioning/SigningKeyRing.cs" />
+    <Compile Include="Sessions/EphemeralCapabilityIssuer.cs" />
+    <Compile Include="Sessions/SessionLeaseService.cs" />
+    <Compile Include="State/EphemeralStateContracts.cs" />
+    <Compile Include="State/InMemoryEphemeralRendezvousStore.cs" />
+    <Compile Include="State/StoreResultMapping.cs" />
+    <Compile Include="Transport/LiteNetNatRequestCodec.cs" />
+    <Compile Include="Transport/NatMediationProcessor.cs" />
+    <Compile Include="Transport/UdpMediatorOptions.cs" />
+    <Compile Include="Transport/UdpMediatorService.cs" />
+  </ItemGroup>
 </Project>

src/FinalFactory.Rendezvous.Server/Http/RendezvousExceptionHandler.cs

@@ -4,7 +4,7 @@ using Microsoft.AspNetCore.Diagnostics;
 
 namespace FinalFactory.Rendezvous.Server.Http;
 
-internal sealed partial class RendezvousExceptionHandler(
+internal sealed class RendezvousExceptionHandler(
     ILogger<RendezvousExceptionHandler> logger) : IExceptionHandler
 {
     public async ValueTask<bool> TryHandleAsync(
@@ -51,13 +51,15 @@ internal sealed partial class RendezvousExceptionHandler(
         return true;
     }
 
-    [LoggerMessage(
+    private static readonly Action<ILogger, string, int, string, Exception?> RequestFailure =
-        EventId = 200,
+        LoggerMessage.Define<string, int, string>(
-        Level = LogLevel.Warning,
+            LogLevel.Warning,
-        Message = "Request failed with {FailureKind} and HTTP status {StatusCode}; correlation {CorrelationId}")]
+            new EventId(200, nameof(LogRequestFailure)),
-    private static partial void LogRequestFailure(
+            "Request failed with {FailureKind} and HTTP status {StatusCode}; correlation {CorrelationId}");
+
+    private static void LogRequestFailure(
         ILogger logger,
         string failureKind,
         int statusCode,
-        string correlationId);
+        string correlationId) => RequestFailure(logger, failureKind, statusCode, correlationId, null);
 }

src/FinalFactory.Rendezvous.Server/Observability/AuditTrail.cs

@@ -4,7 +4,7 @@ using Microsoft.Extensions.Options;
 
 namespace FinalFactory.Rendezvous.Server.Observability;
 
-internal sealed partial class AuditTrail
+internal sealed class AuditTrail
 {
     private readonly object _gate = new();
     private readonly LinkedList<AuditEntry> _entries = [];
@@ -57,7 +57,6 @@ internal sealed partial class AuditTrail
         _telemetry.RecordAudit(action, result);
         LogOperatorAction(
             _logger,
-            entry.Timestamp,
             entry.ActorFingerprint,
             action,
             result,
@@ -105,19 +104,28 @@ internal sealed partial class AuditTrail
         return Convert.ToHexString(digest.AsSpan(0, 12));
     }
 
-    [LoggerMessage(
+    private static readonly Action<ILogger, string, string, string, string, string, string, Exception?>
-        EventId = 100,
+        OperatorAction = LoggerMessage.Define<string, string, string, string, string, string>(
-        Level = LogLevel.Information,
+            LogLevel.Information,
-        Message = "Operator audit at {Timestamp}: actor {ActorFingerprint} action {Action} completed with {Result} for {TargetKind} target {TargetFingerprint}; correlation {CorrelationId}")]
+            new EventId(100, nameof(LogOperatorAction)),
-    private static partial void LogOperatorAction(
+            "Operator audit: actor {ActorFingerprint} action {Action} completed with {Result} for {TargetKind} target {TargetFingerprint}; correlation {CorrelationId}");
+
+    private static void LogOperatorAction(
         ILogger logger,
-        DateTimeOffset timestamp,
         string actorFingerprint,
         string action,
         string result,
         string targetKind,
         string targetFingerprint,
-        string correlationId);
+        string correlationId) => OperatorAction(
+            logger,
+            actorFingerprint,
+            action,
+            result,
+            targetKind,
+            targetFingerprint,
+            correlationId,
+            null);
 }
 
 internal sealed record AuditEntry(

src/FinalFactory.Rendezvous.Server/Operations/OperatorModels.cs

@@ -3,6 +3,7 @@ namespace FinalFactory.Rendezvous.Server.Operations;
 internal sealed record OperatorStatusResponse
 {
     public required string Status { get; init; }
+    public required OperatorCompatibilityResponse Compatibility { get; init; }
     public required OperatorReadinessResponse Readiness { get; init; }
     public required OperatorStoreResponse Store { get; init; }
     public required IReadOnlyList<OperatorTenantResponse> Tenants { get; init; }
@@ -10,6 +11,18 @@ internal sealed record OperatorStatusResponse
     public required IReadOnlyDictionary<string, long> AuditCounts { get; init; }
 }
 
+internal sealed record OperatorCompatibilityResponse
+{
+    public required string ServerVersion { get; init; }
+    public required string MinimumClientVersion { get; init; }
+    public required int MaximumClientMajorVersion { get; init; }
+    public required IReadOnlyList<int> HttpContractVersions { get; init; }
+    public required IReadOnlyList<int> UdpContractVersions { get; init; }
+    public required IReadOnlyList<int> ConnectionTicketFormatVersions { get; init; }
+    public required int LiteNetLibMajorVersion { get; init; }
+    public required string GameplayProtocolCompatibility { get; init; }
+}
+
 internal sealed record OperatorReadinessResponse
 {
     public required bool HttpListener { get; init; }

src/FinalFactory.Rendezvous.Server/Operations/OperatorService.cs

@@ -19,6 +19,7 @@ internal sealed class OperatorService(
         return new OperatorStatusResponse
         {
             Status = readinessSnapshot.IsReady ? "ready" : "not-ready",
+            Compatibility = ReleaseCompatibility.CreateResponse(),
             Readiness = new OperatorReadinessResponse
             {
                 HttpListener = readinessSnapshot.HttpListenerReady,

src/FinalFactory.Rendezvous.Server/Operations/ReleaseCompatibility.cs

@@ -0,0 +1,41 @@
+using System.Reflection;
+using FinalFactory.Rendezvous.Contracts;
+
+namespace FinalFactory.Rendezvous.Server.Operations;
+
+internal static class ReleaseCompatibility
+{
+    private static readonly Assembly ServerAssembly = typeof(ReleaseCompatibility).Assembly;
+
+    internal static string MinimumClientVersion => Metadata("RendezvousMinimumClientVersion");
+    internal static int MaximumClientMajorVersion => MetadataInteger("RendezvousMaximumClientMajorVersion");
+    internal static int UdpContractVersion => MetadataInteger("RendezvousUdpContractVersion");
+    internal static int ConnectionTicketFormatVersion => MetadataInteger("RendezvousConnectionTicketFormatVersion");
+    internal static int LiteNetLibMajorVersion => MetadataInteger("RendezvousLiteNetLibMajorVersion");
+
+    internal static OperatorCompatibilityResponse CreateResponse() => new()
+    {
+        ServerVersion = ServerAssembly
+            .GetCustomAttribute<AssemblyInformationalVersionAttribute>()?
+            .InformationalVersion.Split('+', 2)[0]
+            ?? ServerAssembly.GetName().Version?.ToString(3)
+            ?? "unknown",
+        MinimumClientVersion = MinimumClientVersion,
+        MaximumClientMajorVersion = MaximumClientMajorVersion,
+        HttpContractVersions = [ContractLimits.ContractVersion],
+        UdpContractVersions = [UdpContractVersion],
+        ConnectionTicketFormatVersions = [ConnectionTicketFormatVersion],
+        LiteNetLibMajorVersion = LiteNetLibMajorVersion,
+        GameplayProtocolCompatibility = "exact-per-tenant",
+    };
+
+    private static string Metadata(string key) => ServerAssembly
+        .GetCustomAttributes<AssemblyMetadataAttribute>()
+        .Single(attribute => string.Equals(attribute.Key, key, StringComparison.Ordinal))
+        .Value
+        ?? throw new InvalidOperationException($"Assembly metadata {key} has no value.");
+
+    private static int MetadataInteger(string key) => int.Parse(
+        Metadata(key),
+        System.Globalization.CultureInfo.InvariantCulture);
+}

src/FinalFactory.Rendezvous.Server/Program.cs

@@ -3,6 +3,7 @@ using FinalFactory.Rendezvous.Contracts;
 using FinalFactory.Rendezvous.Server.Abuse;
 using FinalFactory.Rendezvous.Server.Browser;
 using FinalFactory.Rendezvous.Server.ConnectionOutcomes;
+using FinalFactory.Rendezvous.Server.Deployment;
 using FinalFactory.Rendezvous.Server.Http;
 using FinalFactory.Rendezvous.Server.JoinAttempts;
 using FinalFactory.Rendezvous.Server.Observability;
@@ -235,8 +236,29 @@ AbuseProtectionOptions configuredAbuseProtection = builder.Configuration
 builder.Services.Configure<ForwardedHeadersOptions>(options =>
     TrustedProxyForwarding.Configure(options, configuredAbuseProtection));
 
+DeploymentOptions deploymentOptions = builder.Configuration
+    .GetSection(DeploymentOptions.SectionName)
+    .Get<DeploymentOptions>() ?? new DeploymentOptions();
+if (!builder.Environment.IsDevelopment() && !isOpenApiGeneration)
+{
+    IReadOnlyList<string> deploymentErrors = deploymentOptions.ValidateProduction(
+        configuredAbuseProtection,
+        builder.Configuration["AllowedHosts"]);
+    if (deploymentErrors.Count > 0)
+    {
+        throw new DeploymentConfigurationException(deploymentErrors);
+    }
+}
+
+builder.Services.AddSingleton(Microsoft.Extensions.Options.Options.Create(deploymentOptions));
+builder.Services.Configure<HostOptions>(options =>
+    options.ShutdownTimeout = TimeSpan.FromSeconds(deploymentOptions.DrainDeadlineSeconds + 10));
+
 SystemRendezvousClock rendezvousClock = new();
-EphemeralStoreOptions stateOptions = new();
+EphemeralStoreOptions stateOptions = new()
+{
+    GracefulDrainLifetime = TimeSpan.FromSeconds(deploymentOptions.DrainDeadlineSeconds),
+};
 InMemoryEphemeralRendezvousStore stateStore = new(
     stateOptions,
     rendezvousClock,
@@ -304,10 +326,12 @@ if (!isOpenApiGeneration)
     builder.Services.AddSingleton<NatMediationProcessor>();
     builder.Services.AddHostedService(static services =>
         services.GetRequiredService<UdpMediatorService>());
+    // Hosted services stop in reverse registration order. Drain must complete while
+    // Kestrel and the UDP mediator are still able to finish bounded in-flight work.
+    builder.Services.AddHostedService<GracefulDrainService>();
 }
 
 WebApplication app = builder.Build();
-app.Lifetime.ApplicationStopping.Register(() => stateStore.BeginDrain());
 
 if (TrustedProxyForwarding.IsEnabled(configuredAbuseProtection))
 {

src/FinalFactory.Rendezvous.Server/Properties/AssemblyInfo.cs

@@ -1,3 +1,4 @@
 using System.Runtime.CompilerServices;
 
 [assembly: InternalsVisibleTo("FinalFactory.Rendezvous.Tests")]
+[assembly: InternalsVisibleTo("FinalFactory.Rendezvous.Capacity")]

src/FinalFactory.Rendezvous.Server/Provisioning/SecretProviders.cs

@@ -40,18 +40,32 @@ internal sealed class SecretMaterial : IDisposable
 
 internal sealed class EnvironmentSecretProvider : ISecretProvider
 {
-    private const string Prefix = "env:";
+    private const string EnvironmentPrefix = "env:";
+    private const string FilePrefix = "file:";
+    private const int MaximumSecretBytes = 4096;
 
     public bool TryGetSecret(string reference, out SecretMaterial? secret)
     {
         secret = null;
-        if (!reference.StartsWith(Prefix, StringComparison.Ordinal)
+        if (reference.StartsWith(EnvironmentPrefix, StringComparison.Ordinal)
-            || reference.Length == Prefix.Length)
+            && reference.Length > EnvironmentPrefix.Length)
         {
-            return false;
+            return TryGetEnvironmentSecret(reference[EnvironmentPrefix.Length..], out secret);
         }
 
-        string? encoded = Environment.GetEnvironmentVariable(reference[Prefix.Length..]);
+        if (reference.StartsWith(FilePrefix, StringComparison.Ordinal)
+            && reference.Length > FilePrefix.Length)
+        {
+            return TryGetFileSecret(reference[FilePrefix.Length..], out secret);
+        }
+
+        return false;
+    }
+
+    private static bool TryGetEnvironmentSecret(string variableName, out SecretMaterial? secret)
+    {
+        secret = null;
+        string? encoded = Environment.GetEnvironmentVariable(variableName);
         if (string.IsNullOrEmpty(encoded))
         {
             return false;
@@ -60,6 +74,12 @@ internal sealed class EnvironmentSecretProvider : ISecretProvider
         try
         {
             byte[] bytes = Convert.FromBase64String(encoded);
+            if (bytes.Length is 0 or > MaximumSecretBytes)
+            {
+                CryptographicOperations.ZeroMemory(bytes);
+                return false;
+            }
+
             secret = new SecretMaterial(bytes);
             CryptographicOperations.ZeroMemory(bytes);
             return true;
@@ -69,6 +89,47 @@ internal sealed class EnvironmentSecretProvider : ISecretProvider
             return false;
         }
     }
+
+    private static bool TryGetFileSecret(string path, out SecretMaterial? secret)
+    {
+        secret = null;
+        byte[]? bytes = null;
+        try
+        {
+            FileInfo file = new(path);
+            if (!file.Exists
+                || !Path.IsPathFullyQualified(path)
+                || file.LinkTarget is not null
+                || file.Length is <= 0 or > MaximumSecretBytes)
+            {
+                return false;
+            }
+
+            bytes = File.ReadAllBytes(path);
+            if (bytes.Length is 0 or > MaximumSecretBytes)
+            {
+                return false;
+            }
+
+            secret = new SecretMaterial(bytes);
+            return true;
+        }
+        catch (Exception exception) when (exception is IOException
+                                           or UnauthorizedAccessException
+                                           or ArgumentException
+                                           or NotSupportedException
+                                           or System.Security.SecurityException)
+        {
+            return false;
+        }
+        finally
+        {
+            if (bytes is not null)
+            {
+                CryptographicOperations.ZeroMemory(bytes);
+            }
+        }
+    }
 }
 
 internal sealed class EphemeralDevelopmentSecretProvider : ISecretProvider, IDisposable

src/FinalFactory.Rendezvous.Server/State/InMemoryEphemeralRendezvousStore.cs

@@ -11,15 +11,29 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
     private readonly DateTimeOffset _wallOrigin;
     private readonly TimeSpan _monotonicOrigin;
     private readonly Dictionary<SessionListingId, ListingEntry> _listings = [];
+    private readonly Dictionary<string, int> _listingCountsByOwner = new(StringComparer.Ordinal);
+    private readonly PriorityQueue<DeadlineEntry<SessionListingId>, long> _listingExpiries = new();
+    private readonly HashSet<SessionListingId> _scheduledListingExpiries = [];
     private readonly Dictionary<LeaseId, SessionListingId> _leases = [];
     private readonly Dictionary<MediationHandle, SessionListingId> _presenceHandles = [];
     private readonly Dictionary<MediationHandle, PresenceEntry> _presence = [];
+    private readonly PriorityQueue<DeadlineEntry<MediationHandle>, long> _presenceExpiries = new();
+    private readonly HashSet<MediationHandle> _scheduledPresenceExpiries = [];
     private readonly Dictionary<JoinAttemptId, AttemptEntry> _attempts = [];
+    private readonly Dictionary<TenantScope, int> _attemptCountsByScope = [];
+    private readonly Dictionary<SessionListingId, HashSet<JoinAttemptId>> _attemptsByListing = [];
+    private readonly PriorityQueue<DeadlineEntry<JoinAttemptId>, long> _attemptExpiries = new();
     private readonly Dictionary<JoinAttemptId, OutcomeReportEntry> _outcomeReports = [];
+    private readonly Dictionary<SessionListingId, HashSet<JoinAttemptId>> _outcomesByListing = [];
+    private readonly PriorityQueue<DeadlineEntry<JoinAttemptId>, long> _outcomeExpiries = new();
     private readonly Dictionary<MediationHandle, JoinAttemptId> _attemptHandles = [];
     private readonly Dictionary<string, IdempotencyEntry> _idempotency = new(StringComparer.Ordinal);
+    private readonly PriorityQueue<DeadlineEntry<string>, long> _idempotencyExpiries = new();
     private readonly Dictionary<string, TimeSpan> _replay = new(StringComparer.Ordinal);
+    private readonly PriorityQueue<DeadlineEntry<string>, long> _replayExpiries = new();
     private readonly Dictionary<string, TimeSpan> _revocations = new(StringComparer.Ordinal);
+    private readonly PriorityQueue<DeadlineEntry<string>, long> _revocationExpiries = new();
+    private readonly HashSet<string> _scheduledRevocationExpiries = new(StringComparer.Ordinal);
     private TimeSpan? _drainDeadline;
     private TimeSpan _nextUdpMaintenance;
     private long _maintenanceSweepCount;
@@ -46,6 +60,22 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
 
     public Guid InstanceId { get; }
     internal long MaintenanceSweepCount => Interlocked.Read(ref _maintenanceSweepCount);
+    internal int ScheduledExpiryEntryCount
+    {
+        get
+        {
+            lock (_gate)
+            {
+                return _listingExpiries.Count
+                    + _presenceExpiries.Count
+                    + _attemptExpiries.Count
+                    + _outcomeExpiries.Count
+                    + _idempotencyExpiries.Count
+                    + _replayExpiries.Count
+                    + _revocationExpiries.Count;
+            }
+        }
+    }
 
     public bool IsAvailable
     {
@@ -82,6 +112,15 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
         }
     }
 
+    internal int GetActiveJoinAttemptCountForDrain()
+    {
+        lock (_gate)
+        {
+            _expiryChurn += RemoveExpiredAttempts(_monotonicClock.Elapsed);
+            return _attempts.Count;
+        }
+    }
+
     internal EphemeralStoreSnapshot GetMetricsSnapshot()
     {
         lock (_gate)
@@ -151,10 +190,8 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
 
         if (_listings.Count >= _options.MaxListings
             || _idempotency.Count >= _options.MaxIdempotencyEntries
-            || _listings.Values.Count(entry => string.Equals(
+            || _listingCountsByOwner.GetValueOrDefault(command.Listing.OwnerSubject)
-                entry.Definition.OwnerSubject,
+                >= command.OwnerListingLimit)
-                command.Listing.OwnerSubject,
-                StringComparison.Ordinal)) >= command.OwnerListingLimit)
         {
             return new(StoreResultCode.CapacityExceeded);
         }
@@ -173,12 +210,21 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
             WallDeadline(now, _options.LeaseLifetime),
             version: 1);
         _listings.Add(frozen.ListingId, entry);
+        ScheduleMutableDeadline(
+            _listingExpiries,
+            _scheduledListingExpiries,
+            frozen.ListingId,
+            entry.LeaseDeadline);
+        _listingCountsByOwner[frozen.OwnerSubject] =
+            _listingCountsByOwner.GetValueOrDefault(frozen.OwnerSubject) + 1;
         _leases.Add(frozen.LeaseId, frozen.ListingId);
         _presenceHandles.Add(frozen.HostPresenceHandle, frozen.ListingId);
-        _idempotency.Add(idempotencyKey, new(
+        IdempotencyEntry idempotency = new(
             command.RequestFingerprint,
             frozen.ListingId,
-            now + _options.IdempotencyLifetime));
+            now + _options.IdempotencyLifetime);
+        _idempotency.Add(idempotencyKey, idempotency);
+        EnqueueDeadline(_idempotencyExpiries, idempotencyKey, idempotency.Deadline);
         return new(StoreResultCode.Success, Snapshot(entry));
     }, cancellationToken);
 
@@ -336,10 +382,20 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
             return new(StoreResultCode.CapacityExceeded);
         }
 
-        _presence[command.Handle] = new(
+        bool isNewPresence = !_presence.ContainsKey(command.Handle);
+        PresenceEntry presence = new(
             command.PublicEndpoint,
             command.LocalEndpoint,
             now + _options.PresenceLifetime);
+        _presence[command.Handle] = presence;
+        if (isNewPresence)
+        {
+            ScheduleMutableDeadline(
+                _presenceExpiries,
+                _scheduledPresenceExpiries,
+                command.Handle,
+                presence.Deadline);
+        }
         return new(StoreResultCode.Success, Snapshot(entry));
     }, cancellationToken, eagerCleanup: false);
 
@@ -434,8 +490,7 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
         if (_attempts.Count >= _options.MaxJoinAttempts
             || _outcomeReports.Count >= _options.MaxOutcomeReports
             || _idempotency.Count >= _options.MaxIdempotencyEntries
-            || _attempts.Values.Count(entry => entry.Command.Scope == command.Scope)
+            || _attemptCountsByScope.GetValueOrDefault(command.Scope) >= command.ScopeAttemptLimit)
-                >= command.ScopeAttemptLimit)
         {
             return new(StoreResultCode.CapacityExceeded);
         }
@@ -451,16 +506,25 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
             now + _options.JoinAttemptLifetime,
             WallDeadline(now, _options.JoinAttemptLifetime));
         _attempts.Add(command.AttemptId, attempt);
-        _outcomeReports.Add(command.AttemptId, new(
+        AddToIndex(_attemptsByListing, command.ListingId, command.AttemptId);
+        _attemptCountsByScope[command.Scope] =
+            _attemptCountsByScope.GetValueOrDefault(command.Scope) + 1;
+        EnqueueDeadline(_attemptExpiries, command.AttemptId, attempt.Deadline);
+        OutcomeReportEntry outcome = new(
             command.ListingId,
             command.ClientSubject,
             command.ClientCapabilityFingerprint,
-            now + _options.JoinAttemptLifetime + _options.IdempotencyLifetime));
+            now + _options.JoinAttemptLifetime + _options.IdempotencyLifetime);
+        _outcomeReports.Add(command.AttemptId, outcome);
+        AddToIndex(_outcomesByListing, command.ListingId, command.AttemptId);
+        EnqueueDeadline(_outcomeExpiries, command.AttemptId, outcome.Deadline);
         _attemptHandles.Add(command.MediationHandle, command.AttemptId);
-        _idempotency.Add(idempotencyKey, new(
+        IdempotencyEntry idempotency = new(
             command.RequestFingerprint,
             command.AttemptId,
-            now + _options.IdempotencyLifetime));
+            now + _options.IdempotencyLifetime);
+        _idempotency.Add(idempotencyKey, idempotency);
+        EnqueueDeadline(_idempotencyExpiries, idempotencyKey, idempotency.Deadline);
         return new(StoreResultCode.Success, Snapshot(attempt));
     }, cancellationToken);
 
@@ -744,7 +808,9 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
             throw new ArgumentOutOfRangeException(nameof(consumption), "Replay lifetime exceeds the configured ceiling.");
         }
 
-        _replay.Add(key, now + lifetime);
+        TimeSpan deadline = now + lifetime;
+        _replay.Add(key, deadline);
+        EnqueueDeadline(_replayExpiries, key, deadline);
         return new(StoreResultCode.Success, true);
     }, cancellationToken);
 
@@ -781,7 +847,24 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
             + _presence.Count
             + _attempts.Count
             + _outcomeReports.Count;
-        _revocations[subject] = now + lifetime;
+        TimeSpan deadline = now + lifetime;
+        bool isNewRevocation = !_revocations.TryGetValue(subject, out TimeSpan existingDeadline);
+        if (!isNewRevocation && existingDeadline > deadline)
+        {
+            // A repeated operator action may extend protection but cannot silently
+            // shorten an already-authoritative security revocation.
+            deadline = existingDeadline;
+        }
+
+        _revocations[subject] = deadline;
+        if (isNewRevocation)
+        {
+            ScheduleMutableDeadline(
+                _revocationExpiries,
+                _scheduledRevocationExpiries,
+                subject,
+                deadline);
+        }
         SessionListingId[] listings = _listings
             .Where(item => string.Equals(item.Value.Definition.OwnerSubject, subject, StringComparison.Ordinal))
             .Select(static item => item.Key)
@@ -805,7 +888,7 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
         }
         foreach (JoinAttemptId attemptId in outcomeReports)
         {
-            _outcomeReports.Remove(attemptId);
+            RemoveOutcome(attemptId);
         }
 
         int activeResourcesAfter = _listings.Count
@@ -898,70 +981,42 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
             ClearActiveState();
         }
 
-        _expiryChurn += RemoveExpired(_revocations, now);
+        _expiryChurn += RemoveExpiredMutableDeadlines(
-        _expiryChurn += RemoveExpired(_replay, now);
+            _revocations,
-        string[] expiredIdempotency = _idempotency
+            _revocationExpiries,
-            .Where(item => item.Value.Deadline <= now)
+            _scheduledRevocationExpiries,
-            .Select(static item => item.Key)
+            now);
-            .ToArray();
+        _expiryChurn += RemoveExpiredDeadlines(_replay, _replayExpiries, now);
-        _expiryChurn += expiredIdempotency.Length;
+        _expiryChurn += RemoveExpiredIdempotency(now);
-        foreach (string key in expiredIdempotency)
+        _expiryChurn += RemoveExpiredPresence(now);
-        {
+        _expiryChurn += RemoveExpiredAttempts(now);
-            _idempotency.Remove(key);
+        _expiryChurn += RemoveExpiredOutcomes(now);
-        }
+        _expiryChurn += RemoveExpiredListings(now);
-
-        MediationHandle[] expiredPresence = _presence
-            .Where(item => item.Value.Deadline <= now)
-            .Select(static item => item.Key)
-            .ToArray();
-        _expiryChurn += expiredPresence.Length;
-        foreach (MediationHandle handle in expiredPresence)
-        {
-            _presence.Remove(handle);
-        }
-
-        JoinAttemptId[] expiredAttempts = _attempts
-            .Where(item => item.Value.Deadline <= now)
-            .Select(static item => item.Key)
-            .ToArray();
-        _expiryChurn += expiredAttempts.Length;
-        foreach (JoinAttemptId attemptId in expiredAttempts)
-        {
-            RemoveAttempt(attemptId);
-        }
-
-        JoinAttemptId[] expiredOutcomes = _outcomeReports
-            .Where(item => item.Value.Deadline <= now)
-            .Select(static item => item.Key)
-            .ToArray();
-        _expiryChurn += expiredOutcomes.Length;
-        foreach (JoinAttemptId attemptId in expiredOutcomes)
-        {
-            _outcomeReports.Remove(attemptId);
-        }
-
-        SessionListingId[] expiredListings = _listings
-            .Where(item => item.Value.LeaseDeadline <= now)
-            .Select(static item => item.Key)
-            .ToArray();
-        _expiryChurn += expiredListings.Length;
-        foreach (SessionListingId listingId in expiredListings)
-        {
-            RemoveListing(listingId);
-        }
     }
 
     private void ClearActiveState()
     {
         _listings.Clear();
+        _listingCountsByOwner.Clear();
+        _listingExpiries.Clear();
+        _scheduledListingExpiries.Clear();
         _leases.Clear();
         _presenceHandles.Clear();
         _presence.Clear();
+        _presenceExpiries.Clear();
+        _scheduledPresenceExpiries.Clear();
         _attempts.Clear();
+        _attemptCountsByScope.Clear();
+        _attemptsByListing.Clear();
+        _attemptExpiries.Clear();
         _outcomeReports.Clear();
+        _outcomesByListing.Clear();
+        _outcomeExpiries.Clear();
         _attemptHandles.Clear();
         _idempotency.Clear();
+        _idempotencyExpiries.Clear();
         _replay.Clear();
+        _replayExpiries.Clear();
     }
 
     private void RemoveListing(SessionListingId listingId)
@@ -972,23 +1027,23 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
         }
 
         _leases.Remove(listing.Definition.LeaseId);
+        DecrementCount(_listingCountsByOwner, listing.Definition.OwnerSubject);
         _presenceHandles.Remove(listing.Definition.HostPresenceHandle);
         _presence.Remove(listing.Definition.HostPresenceHandle);
-        foreach (JoinAttemptId attemptId in _attempts
+        if (_attemptsByListing.TryGetValue(listingId, out HashSet<JoinAttemptId>? attempts))
-                     .Where(item => item.Value.Command.ListingId == listingId)
-                     .Select(static item => item.Key)
-                     .ToArray())
         {
-            RemoveAttempt(attemptId);
+            foreach (JoinAttemptId attemptId in attempts.ToArray())
+            {
+                RemoveAttempt(attemptId);
+            }
         }
 
-
+        if (_outcomesByListing.TryGetValue(listingId, out HashSet<JoinAttemptId>? outcomes))
-        foreach (JoinAttemptId attemptId in _outcomeReports
-                     .Where(item => item.Value.ListingId == listingId)
-                     .Select(static item => item.Key)
-                     .ToArray())
         {
-            _outcomeReports.Remove(attemptId);
+            foreach (JoinAttemptId attemptId in outcomes.ToArray())
+            {
+                RemoveOutcome(attemptId);
+            }
         }
     }
 
@@ -997,9 +1052,260 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
         if (_attempts.Remove(attemptId, out AttemptEntry? attempt))
         {
             _attemptHandles.Remove(attempt.Command.MediationHandle);
+            DecrementCount(_attemptCountsByScope, attempt.Command.Scope);
+            RemoveFromIndex(_attemptsByListing, attempt.Command.ListingId, attemptId);
         }
     }
 
+    private void RemoveOutcome(JoinAttemptId attemptId)
+    {
+        if (_outcomeReports.Remove(attemptId, out OutcomeReportEntry? outcome))
+        {
+            RemoveFromIndex(_outcomesByListing, outcome.ListingId, attemptId);
+        }
+    }
+
+    private static void AddToIndex<TKey>(
+        Dictionary<TKey, HashSet<JoinAttemptId>> index,
+        TKey key,
+        JoinAttemptId attemptId)
+        where TKey : notnull
+    {
+        if (!index.TryGetValue(key, out HashSet<JoinAttemptId>? values))
+        {
+            values = [];
+            index.Add(key, values);
+        }
+
+        values.Add(attemptId);
+    }
+
+    private static void RemoveFromIndex<TKey>(
+        Dictionary<TKey, HashSet<JoinAttemptId>> index,
+        TKey key,
+        JoinAttemptId attemptId)
+        where TKey : notnull
+    {
+        if (index.TryGetValue(key, out HashSet<JoinAttemptId>? values)
+            && values.Remove(attemptId)
+            && values.Count == 0)
+        {
+            index.Remove(key);
+        }
+    }
+
+    private static void DecrementCount<TKey>(Dictionary<TKey, int> counts, TKey key)
+        where TKey : notnull
+    {
+        int remaining = counts[key] - 1;
+        if (remaining == 0)
+        {
+            counts.Remove(key);
+        }
+        else
+        {
+            counts[key] = remaining;
+        }
+    }
+
+    private int RemoveExpiredAttempts(TimeSpan now)
+    {
+        int removed = 0;
+        while (_attemptExpiries.TryPeek(
+                   out DeadlineEntry<JoinAttemptId> candidate,
+                   out long deadlineTicks)
+               && deadlineTicks <= now.Ticks)
+        {
+            _attemptExpiries.Dequeue();
+            if (_attempts.TryGetValue(candidate.Key, out AttemptEntry? current)
+                && current.Deadline == candidate.Deadline)
+            {
+                RemoveAttempt(candidate.Key);
+                removed++;
+            }
+        }
+
+        return removed;
+    }
+
+    private int RemoveExpiredListings(TimeSpan now)
+    {
+        int removed = 0;
+        while (_listingExpiries.TryPeek(
+                   out DeadlineEntry<SessionListingId> candidate,
+                   out long deadlineTicks)
+               && deadlineTicks <= now.Ticks)
+        {
+            _listingExpiries.Dequeue();
+            _scheduledListingExpiries.Remove(candidate.Key);
+            if (!_listings.TryGetValue(candidate.Key, out ListingEntry? current))
+            {
+                continue;
+            }
+
+            if (current.LeaseDeadline > now)
+            {
+                ScheduleMutableDeadline(
+                    _listingExpiries,
+                    _scheduledListingExpiries,
+                    candidate.Key,
+                    current.LeaseDeadline);
+            }
+            else
+            {
+                RemoveListing(candidate.Key);
+                removed++;
+            }
+        }
+
+        return removed;
+    }
+
+    private int RemoveExpiredPresence(TimeSpan now)
+    {
+        int removed = 0;
+        while (_presenceExpiries.TryPeek(
+                   out DeadlineEntry<MediationHandle> candidate,
+                   out long deadlineTicks)
+               && deadlineTicks <= now.Ticks)
+        {
+            _presenceExpiries.Dequeue();
+            _scheduledPresenceExpiries.Remove(candidate.Key);
+            if (!_presence.TryGetValue(candidate.Key, out PresenceEntry? current))
+            {
+                continue;
+            }
+
+            if (current.Deadline > now)
+            {
+                ScheduleMutableDeadline(
+                    _presenceExpiries,
+                    _scheduledPresenceExpiries,
+                    candidate.Key,
+                    current.Deadline);
+            }
+            else if (_presence.Remove(candidate.Key))
+            {
+                removed++;
+            }
+        }
+
+        return removed;
+    }
+
+    private int RemoveExpiredOutcomes(TimeSpan now)
+    {
+        int removed = 0;
+        while (_outcomeExpiries.TryPeek(
+                   out DeadlineEntry<JoinAttemptId> candidate,
+                   out long deadlineTicks)
+               && deadlineTicks <= now.Ticks)
+        {
+            _outcomeExpiries.Dequeue();
+            if (_outcomeReports.TryGetValue(candidate.Key, out OutcomeReportEntry? current)
+                && current.Deadline == candidate.Deadline)
+            {
+                RemoveOutcome(candidate.Key);
+                removed++;
+            }
+        }
+
+        return removed;
+    }
+
+    private int RemoveExpiredIdempotency(TimeSpan now)
+    {
+        int removed = 0;
+        while (_idempotencyExpiries.TryPeek(
+                   out DeadlineEntry<string> candidate,
+                   out long deadlineTicks)
+               && deadlineTicks <= now.Ticks)
+        {
+            _idempotencyExpiries.Dequeue();
+            if (_idempotency.TryGetValue(candidate.Key, out IdempotencyEntry? current)
+                && current.Deadline == candidate.Deadline
+                && _idempotency.Remove(candidate.Key))
+            {
+                removed++;
+            }
+        }
+
+        return removed;
+    }
+
+    private static int RemoveExpiredDeadlines<TKey>(
+        Dictionary<TKey, TimeSpan> entries,
+        PriorityQueue<DeadlineEntry<TKey>, long> expiries,
+        TimeSpan now)
+        where TKey : notnull
+    {
+        int removed = 0;
+        while (expiries.TryPeek(out DeadlineEntry<TKey> candidate, out long deadlineTicks)
+               && deadlineTicks <= now.Ticks)
+        {
+            expiries.Dequeue();
+            if (entries.TryGetValue(candidate.Key, out TimeSpan current)
+                && current == candidate.Deadline
+                && entries.Remove(candidate.Key))
+            {
+                removed++;
+            }
+        }
+
+        return removed;
+    }
+
+    private static int RemoveExpiredMutableDeadlines<TKey>(
+        Dictionary<TKey, TimeSpan> entries,
+        PriorityQueue<DeadlineEntry<TKey>, long> expiries,
+        HashSet<TKey> scheduled,
+        TimeSpan now)
+        where TKey : notnull
+    {
+        int removed = 0;
+        while (expiries.TryPeek(out DeadlineEntry<TKey> candidate, out long deadlineTicks)
+               && deadlineTicks <= now.Ticks)
+        {
+            expiries.Dequeue();
+            scheduled.Remove(candidate.Key);
+            if (!entries.TryGetValue(candidate.Key, out TimeSpan current))
+            {
+                continue;
+            }
+
+            if (current > now)
+            {
+                ScheduleMutableDeadline(expiries, scheduled, candidate.Key, current);
+            }
+            else if (entries.Remove(candidate.Key))
+            {
+                removed++;
+            }
+        }
+
+        return removed;
+    }
+
+    private static void ScheduleMutableDeadline<TKey>(
+        PriorityQueue<DeadlineEntry<TKey>, long> expiries,
+        HashSet<TKey> scheduled,
+        TKey key,
+        TimeSpan deadline)
+        where TKey : notnull
+    {
+        if (scheduled.Add(key))
+        {
+            EnqueueDeadline(expiries, key, deadline);
+        }
+    }
+
+    private static void EnqueueDeadline<TKey>(
+        PriorityQueue<DeadlineEntry<TKey>, long> expiries,
+        TKey key,
+        TimeSpan deadline)
+        where TKey : notnull =>
+        expiries.Enqueue(new(key, deadline), deadline.Ticks);
+
     private bool HandleExists(MediationHandle handle) =>
         _presenceHandles.ContainsKey(handle) || _attemptHandles.ContainsKey(handle);
 
@@ -1039,20 +1345,6 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
         IsCancelled = entry.IsCancelled,
     };
 
-    private static int RemoveExpired(Dictionary<string, TimeSpan> entries, TimeSpan now)
-    {
-        string[] expired = entries
-            .Where(item => item.Value <= now)
-            .Select(static item => item.Key)
-            .ToArray();
-        foreach (string key in expired)
-        {
-            entries.Remove(key);
-        }
-
-        return expired.Length;
-    }
-
     private static void ValidateListing(ListingDefinition listing)
     {
         ArgumentNullException.ThrowIfNull(listing);
@@ -1195,6 +1487,9 @@ internal sealed class InMemoryEphemeralRendezvousStore : IEphemeralRendezvousSto
         public bool IsCancelled { get; set; }
     }
 
+    private readonly record struct DeadlineEntry<TKey>(TKey Key, TimeSpan Deadline)
+        where TKey : notnull;
+
     private sealed class OutcomeReportEntry(
         SessionListingId listingId,
         string clientSubject,

src/FinalFactory.Rendezvous.Server/Transport/UdpMediatorService.cs

@@ -8,7 +8,7 @@ using Microsoft.Extensions.Options;
 
 namespace FinalFactory.Rendezvous.Server.Transport;
 
-internal sealed partial class UdpMediatorService : BackgroundService
+internal sealed class UdpMediatorService : BackgroundService
 {
     private readonly ILogger<UdpMediatorService> _logger;
     private readonly UdpMediatorOptions _options;
@@ -133,20 +133,23 @@ internal sealed partial class UdpMediatorService : BackgroundService
         manager?.Stop();
     }
 
-    [LoggerMessage(
+    private static readonly Action<ILogger, IPAddress, int, Exception?> MediatorListening =
-        EventId = 1,
+        LoggerMessage.Define<IPAddress, int>(
-        Level = LogLevel.Information,
+            LogLevel.Information,
-        Message = "UDP mediator listening on {ListenAddress}:{ListenPort}")]
+            new EventId(1, nameof(LogMediatorListening)),
-    private static partial void LogMediatorListening(
+            "UDP mediator listening on {ListenAddress}:{ListenPort}");
+
+    private static readonly Action<ILogger, Exception?> MediatorStopped = LoggerMessage.Define(
+        LogLevel.Information,
+        new EventId(2, nameof(LogMediatorStopped)),
+        "UDP mediator stopped");
+
+    private static void LogMediatorListening(
         ILogger logger,
         IPAddress listenAddress,
-        int listenPort);
+        int listenPort) => MediatorListening(logger, listenAddress, listenPort, null);
 
-    [LoggerMessage(
+    private static void LogMediatorStopped(ILogger logger) => MediatorStopped(logger, null);
-        EventId = 2,
-        Level = LogLevel.Information,
-        Message = "UDP mediator stopped")]
-    private static partial void LogMediatorStopped(ILogger logger);
 
     private sealed class LiteNetIntroductionSink(NatPunchModule module) : INatIntroductionSink
     {

src/FinalFactory.Rendezvous.Server/appsettings.json

@@ -1,5 +1,14 @@
 {
   "Rendezvous": {
+    "Deployment": {
+      "PublicHttpBaseUrl": "",
+      "PublicUdpHost": "",
+      "PublicUdpPort": 9050,
+      "DrainDeadlineSeconds": 30,
+      "MinimumDrainSeconds": 1,
+      "SingleActiveInstance": true,
+      "AllowPrivatePublicEndpoints": false
+    },
     "Udp": {
       "ListenAddress": "0.0.0.0",
       "Port": 9050,

src/FinalFactory.Rendezvous.Server/packages.lock.json

@@ -4,7 +4,7 @@
     "net10.0": {
       "LiteNetLib": {
         "type": "Direct",
-        "requested": "[2.1.4, )",
+        "requested": "[2.1.4, 2.1.4]",
         "resolved": "2.1.4",
         "contentHash": "KWlxvMw3Urpqj9joD96LRiK+LC62pQNs/zkXRJc+rHnxgkGp+vV703xzDrxRmv+V1YhCFfIGzs5nrVWtREIlyA=="
       },

src/FinalFactory.Rendezvous.TestClient/packages.lock.json

@@ -4,7 +4,7 @@
     "net8.0": {
       "LiteNetLib": {
         "type": "Direct",
-        "requested": "[2.1.4, )",
+        "requested": "[2.1.4, 2.1.4]",
         "resolved": "2.1.4",
         "contentHash": "KWlxvMw3Urpqj9joD96LRiK+LC62pQNs/zkXRJc+rHnxgkGp+vV703xzDrxRmv+V1YhCFfIGzs5nrVWtREIlyA=="
       },
@@ -22,7 +22,7 @@
         "type": "Project",
         "dependencies": {
           "FinalFactory.Rendezvous.Contracts": "[1.0.0, )",
-          "LiteNetLib": "[2.1.4, )"
+          "LiteNetLib": "[2.1.4, 2.1.4]"
         }
       },
       "finalfactory.rendezvous.contracts": {

tests/FinalFactory.Rendezvous.Capacity/CapacityOptions.cs

@@ -0,0 +1,91 @@
+namespace FinalFactory.Rendezvous.Capacity;
+
+internal sealed record CapacityOptions
+{
+    public required string Profile { get; init; }
+    public required int Listings { get; init; }
+    public required int Attempts { get; init; }
+    public required int Samples { get; init; }
+    public required int SoakCycles { get; init; }
+    public required int SoakSeconds { get; init; }
+    public string? OutputPath { get; init; }
+
+    public static CapacityOptions Parse(string[] args)
+    {
+        Dictionary<string, string> values = ParseArguments(args);
+        string profile = values.GetValueOrDefault("--profile") ?? "quick";
+        (int listings, int attempts, int samples, int soakCycles, int soakSeconds) = profile switch
+        {
+            "quick" => (1_000, 500, 100, 20, 0),
+            "candidate" => (25_000, 10_000, 1_000, 1_000, 300),
+            _ => throw new ArgumentException("--profile must be 'quick' or 'candidate'."),
+        };
+
+        return new()
+        {
+            Profile = profile,
+            Listings = ParsePositive(values.GetValueOrDefault("--listings"), listings, "--listings"),
+            Attempts = ParsePositive(values.GetValueOrDefault("--attempts"), attempts, "--attempts"),
+            Samples = ParsePositive(values.GetValueOrDefault("--samples"), samples, "--samples"),
+            SoakCycles = ParsePositive(
+                values.GetValueOrDefault("--soak-cycles"),
+                soakCycles,
+                "--soak-cycles"),
+            SoakSeconds = ParseNonNegative(
+                values.GetValueOrDefault("--soak-seconds"),
+                soakSeconds,
+                "--soak-seconds"),
+            OutputPath = values.GetValueOrDefault("--output"),
+        };
+    }
+
+    private static Dictionary<string, string> ParseArguments(string[] args)
+    {
+        HashSet<string> allowed =
+        [
+            "--profile",
+            "--listings",
+            "--attempts",
+            "--samples",
+            "--soak-cycles",
+            "--soak-seconds",
+            "--output",
+        ];
+        Dictionary<string, string> values = new(StringComparer.Ordinal);
+        for (int index = 0; index < args.Length; index += 2)
+        {
+            string option = args[index];
+            if (!allowed.Contains(option))
+            {
+                throw new ArgumentException($"Unknown option: {option}.");
+            }
+
+            if (index == args.Length - 1
+                || args[index + 1].StartsWith("--", StringComparison.Ordinal))
+            {
+                throw new ArgumentException($"{option} requires a value.");
+            }
+
+            if (!values.TryAdd(option, args[index + 1]))
+            {
+                throw new ArgumentException($"{option} may be supplied only once.");
+            }
+        }
+
+        return values;
+    }
+
+    private static int ParsePositive(string? value, int fallback, string option) =>
+        value is null
+            ? fallback
+            : int.TryParse(value, out int parsed) && parsed > 0
+                ? parsed
+                : throw new ArgumentException($"{option} must be a positive integer.");
+
+    private static int ParseNonNegative(string? value, int fallback, string option) =>
+        value is null
+            ? fallback
+            : int.TryParse(value, out int parsed) && parsed >= 0
+                ? parsed
+                : throw new ArgumentException($"{option} must be a non-negative integer.");
+}

tests/FinalFactory.Rendezvous.Capacity/CapacityReport.cs

@@ -0,0 +1,76 @@
+namespace FinalFactory.Rendezvous.Capacity;
+
+internal sealed record CapacityReport
+{
+    public required int SchemaVersion { get; init; }
+    public required string EvidenceVersion { get; init; }
+    public required DateTimeOffset GeneratedAt { get; init; }
+    public required string Profile { get; init; }
+    public required RuntimeEvidence Runtime { get; init; }
+    public required CapacityTargets Targets { get; init; }
+    public required IReadOnlyList<CapacityMeasurement> Measurements { get; init; }
+    public required StateEvidence State { get; init; }
+    public required IReadOnlyList<string> Failures { get; init; }
+    public required bool Passed { get; init; }
+}
+
+internal sealed record RuntimeEvidence(
+    string Framework,
+    string OperatingSystem,
+    string Kernel,
+    string Architecture,
+    string CpuModel,
+    int ProcessorCount,
+    string CpuAffinity,
+    string CpuQuota,
+    string MemoryLimit,
+    string GarbageCollector,
+    string CommitSha,
+    string TreeState,
+    string Command,
+    string ImageDigest,
+    string WorkloadSeed,
+    double CapacityPhaseAverageCpuPercent,
+    long PeakWorkingSetBytes,
+    long ManagedBytesAfterCleanup);
+
+internal sealed record CapacityTargets(
+    int VisibleListings,
+    int ActiveJoinAttempts,
+    int CoreControlOperationsPerSecond,
+    int CoreMediationOperationsPerSecond,
+    double CoreControlP95Milliseconds,
+    double CoreMediationP95Milliseconds,
+    double MaximumAverageCpuPercent,
+    long MaximumWorkingSetBytes,
+    int SoakCycles,
+    int SoakDurationSeconds);
+
+internal sealed record CapacityMeasurement(
+    string Operation,
+    int Samples,
+    double P50Milliseconds,
+    double P95Milliseconds,
+    double P99Milliseconds,
+    double OperationsPerSecond,
+    double MinimumOperationsPerSecond,
+    double BudgetMilliseconds,
+    bool Passed);
+
+internal sealed record StateEvidence(
+    int PeakListings,
+    int PeakAttempts,
+    int PeakReplayMarkers,
+    int FinalListings,
+    int FinalAttempts,
+    int FinalReplayMarkers,
+    long ExpiryChurn,
+    long MaintenanceSweeps,
+    int SoakCyclesCompleted,
+    double SoakDurationSeconds,
+    int SoakPeakScheduledExpiryEntries,
+    long SoakManagedGrowthBytes,
+    int SoakHandleGrowth,
+    bool RestartStartedEmpty,
+    bool OverloadWasTyped,
+    bool RecoverySucceeded);

tests/FinalFactory.Rendezvous.Capacity/CapacityRunner.cs

@@ -0,0 +1,580 @@
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.Runtime;
+using System.Runtime.InteropServices;
+using FinalFactory.Rendezvous.Contracts;
+using FinalFactory.Rendezvous.Server.Observability;
+using FinalFactory.Rendezvous.Server.State;
+
+namespace FinalFactory.Rendezvous.Capacity;
+
+internal static class CapacityRunner
+{
+    private static readonly TenantScope Scope = new(new("space-game"), new("production"));
+    private const uint ProtocolVersion = 1;
+
+    public static Task<CapacityReport> RunAsync(CapacityOptions options)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+        Process process = Process.GetCurrentProcess();
+        TimeSpan cpuBefore = process.TotalProcessorTime;
+        Stopwatch capacityPhaseTime = Stopwatch.StartNew();
+        List<string> failures = [];
+        List<CapacityMeasurement> measurements = [];
+        ManualClock clock = new();
+        InMemoryEphemeralRendezvousStore store = CreateStore(options, clock);
+        List<StoredListing> listings = new(options.Listings);
+        List<CreateJoinAttemptCommand> attempts = new(options.Attempts);
+        int registrationSamples = Math.Min(options.Samples, options.Listings);
+        int attemptSamples = Math.Min(options.Samples, options.Attempts);
+
+        for (int index = 0; index < options.Listings - registrationSamples; index++)
+        {
+            listings.Add(CreateVisibleListing(store, index));
+        }
+
+        measurements.Add(Measure(
+            "registration-and-presence",
+            registrationSamples,
+            budgetMilliseconds: 200,
+            minimumOperationsPerSecond: 200,
+            index => listings.Add(CreateVisibleListing(
+                store,
+                options.Listings - registrationSamples + index))));
+
+        measurements.Add(Measure(
+            "lease-renewal",
+            registrationSamples,
+            budgetMilliseconds: 200,
+            minimumOperationsPerSecond: 200,
+            index =>
+            {
+                StoredListing listing = listings[index];
+                StoreResult<StoredListing> renewed = store.RenewLease(new(
+                    listing.Definition.ListingId,
+                    listing.Definition.LeaseId,
+                    listing.Definition.LeaseFingerprint,
+                    listing.Definition.OwnerSubject,
+                    listing.Version));
+                RequireSuccess(renewed, "renewal");
+                listings[index] = renewed.Value!;
+            }));
+
+        int browseSamples = Math.Min(options.Samples, 250);
+        measurements.Add(Measure(
+            "visible-session-browse",
+            browseSamples,
+            budgetMilliseconds: 200,
+            minimumOperationsPerSecond: 200,
+            _ => RequireSuccess(
+                store.BrowseVisibleListings(new(
+                    Scope,
+                    ProtocolVersion,
+                    new RegionId("eu-central"),
+                    ContractLimits.BrowserPageMaxItems,
+                    ExcludeFull: true)),
+                "browse")));
+
+        for (int index = 0; index < options.Attempts - attemptSamples; index++)
+        {
+            CreateJoinAttemptCommand command = CreateAttempt(index, listings[index % listings.Count]);
+            RequireSuccess(store.CreateJoinAttempt(command), "join issuance");
+            attempts.Add(command);
+        }
+
+        measurements.Add(Measure(
+            "join-attempt-issuance",
+            attemptSamples,
+            budgetMilliseconds: 200,
+            minimumOperationsPerSecond: 200,
+            index =>
+            {
+                int sequence = options.Attempts - attemptSamples + index;
+                CreateJoinAttemptCommand command = CreateAttempt(
+                    sequence,
+                    listings[sequence % listings.Count]);
+                RequireSuccess(store.CreateJoinAttempt(command), "join issuance");
+                attempts.Add(command);
+            }));
+
+        int punchSamples = Math.Min(options.Samples, attempts.Count);
+        measurements.Add(MeasureConcurrentPunch(store, attempts, punchSamples));
+        EphemeralStoreSnapshot peak = store.GetSnapshot();
+
+        StoreResult<StoredJoinAttempt> overloaded = store.CreateJoinAttempt(
+            CreateAttempt(options.Attempts + 1, listings[^1]));
+        bool overloadWasTyped = peak.ActiveJoinAttempts == options.Attempts
+            && overloaded.Code == StoreResultCode.CapacityExceeded;
+        if (!overloadWasTyped)
+        {
+            failures.Add(
+                $"Expected typed CapacityExceeded at {options.Attempts} active attempts, "
+                + $"observed count={peak.ActiveJoinAttempts}, result={overloaded.Code}.");
+        }
+
+        int revocationSamples = Math.Min(Math.Max(1, options.Samples / 20), listings.Count / 2);
+        measurements.Add(Measure(
+            "principal-revocation",
+            revocationSamples,
+            budgetMilliseconds: 200,
+            minimumOperationsPerSecond: 50,
+            index => RequireSuccess(
+                store.RevokePrincipal(
+                    listings[index].Definition.OwnerSubject,
+                    TimeSpan.FromMinutes(1)),
+                "principal revocation")));
+
+        using (RendezvousTelemetry telemetry = new(store))
+        {
+            measurements.Add(Measure(
+                "telemetry-recording",
+                Math.Max(100, options.Samples),
+                budgetMilliseconds: 1,
+                minimumOperationsPerSecond: 10_000,
+                _ =>
+                {
+                    telemetry.RecordHttp("browse", 200, 1);
+                    telemetry.RecordUdp("contribution", "accepted", 1);
+                    telemetry.RecordPairingLatency(2);
+                }));
+        }
+
+        clock.Advance(TimeSpan.FromSeconds(61));
+        EphemeralStoreSnapshot? afterCoincidentExpiry = null;
+        measurements.Add(Measure(
+            "coincident-listing-attempt-expiry",
+            samples: 1,
+            budgetMilliseconds: 200,
+            minimumOperationsPerSecond: 0,
+            _ => afterCoincidentExpiry = store.GetSnapshot()));
+        if (afterCoincidentExpiry!.ActiveJoinAttempts != 0
+            || afterCoincidentExpiry.ActiveListings != 0)
+        {
+            failures.Add("Coincident 60-second cleanup retained expired listings or join attempts.");
+        }
+
+        clock.Advance(TimeSpan.FromSeconds(90));
+        _ = store.GetSnapshot();
+        StoredListing recoveryListing = CreateVisibleListing(store, options.Listings + 1);
+        StoreResult<StoredJoinAttempt> recovered = store.CreateJoinAttempt(
+            CreateAttempt(options.Attempts + 2, recoveryListing));
+        bool recoverySucceeded = recovered.Succeeded;
+        if (!recoverySucceeded)
+        {
+            failures.Add($"Store did not recover after attempt expiry: {recovered.Code}.");
+        }
+
+        clock.Advance(TimeSpan.FromSeconds(151));
+        EphemeralStoreSnapshot final = store.GetSnapshot();
+        if (final.ActiveListings != 0
+            || final.ActiveJoinAttempts != 0
+            || final.ReplayMarkers != 0
+            || final.IdempotencyEntries != 0
+            || final.RetainedOutcomeReports != 0)
+        {
+            failures.Add("Expiry cleanup left active or retained state after every configured deadline.");
+        }
+
+        capacityPhaseTime.Stop();
+        process.Refresh();
+        double capacityPhaseCpuPercent = 100
+            * (process.TotalProcessorTime - cpuBefore).TotalSeconds
+            / Math.Max(capacityPhaseTime.Elapsed.TotalSeconds * Environment.ProcessorCount, 0.000_001);
+        if (options.Profile == "candidate" && capacityPhaseCpuPercent > 70)
+        {
+            failures.Add(
+                $"Capacity-phase CPU {capacityPhaseCpuPercent:F1}% exceeded the 70% candidate budget.");
+        }
+
+        SoakEvidence soak = RunAcceleratedSoak(options, failures);
+        ManualClock restartClock = new();
+        EphemeralStoreSnapshot restarted = CreateStore(options, restartClock).GetSnapshot();
+        bool restartStartedEmpty = restarted.ActiveListings == 0
+            && restarted.ActiveJoinAttempts == 0
+            && restarted.ReplayMarkers == 0;
+        if (!restartStartedEmpty)
+        {
+            failures.Add("A restarted store did not begin empty.");
+        }
+
+        foreach (CapacityMeasurement measurement in measurements.Where(static item => !item.Passed))
+        {
+            failures.Add(
+                $"{measurement.Operation} missed its budget: p95={measurement.P95Milliseconds:F3} ms, "
+                + $"rate={measurement.OperationsPerSecond:F1}/s.");
+        }
+
+        GC.Collect();
+        GC.WaitForPendingFinalizers();
+        GC.Collect();
+        process.Refresh();
+        long managedAfterCleanup = GC.GetTotalMemory(forceFullCollection: true);
+        long memoryBudget = 1_610_612_736;
+        if (process.PeakWorkingSet64 > memoryBudget)
+        {
+            failures.Add(
+                $"Peak working set {process.PeakWorkingSet64} exceeded the 1.5 GiB profile budget.");
+        }
+
+        if (options.Profile == "candidate" && Environment.ProcessorCount != 2)
+        {
+            failures.Add(
+                $"Candidate evidence must expose exactly two CPUs; runtime exposed "
+                + $"{Environment.ProcessorCount}.");
+        }
+
+        CapacityReport report = new()
+        {
+            SchemaVersion = 2,
+            EvidenceVersion = "v2",
+            GeneratedAt = DateTimeOffset.UtcNow,
+            Profile = options.Profile,
+            Runtime = new(
+                RuntimeInformation.FrameworkDescription,
+                RuntimeInformation.OSDescription,
+                Environment.OSVersion.VersionString,
+                RuntimeInformation.ProcessArchitecture.ToString(),
+                ReadCpuModel(),
+                Environment.ProcessorCount,
+                Environment.GetEnvironmentVariable("RENDEZVOUS_EVIDENCE_CPUSET") ?? "unrestricted",
+                ReadCgroupValue("/sys/fs/cgroup/cpu.max"),
+                ReadCgroupValue("/sys/fs/cgroup/memory.max"),
+                GCSettings.IsServerGC ? "server" : "workstation",
+                Environment.GetEnvironmentVariable("RENDEZVOUS_EVIDENCE_COMMIT") ?? "unrecorded",
+                Environment.GetEnvironmentVariable("RENDEZVOUS_EVIDENCE_TREE_STATE") ?? "unrecorded",
+                Environment.GetEnvironmentVariable("RENDEZVOUS_EVIDENCE_COMMAND") ?? "unrecorded",
+                Environment.GetEnvironmentVariable("RENDEZVOUS_EVIDENCE_IMAGE_DIGEST") ?? "not-containerized",
+                "fixed-sequences-random-identifiers",
+                capacityPhaseCpuPercent,
+                process.PeakWorkingSet64,
+                managedAfterCleanup),
+            Targets = new(
+                options.Listings,
+                options.Attempts,
+                200,
+                2_000,
+                200,
+                100,
+                70,
+                memoryBudget,
+                options.SoakCycles,
+                options.SoakSeconds),
+            Measurements = measurements,
+            State = new(
+                peak.ActiveListings,
+                peak.ActiveJoinAttempts,
+                peak.ReplayMarkers,
+                final.ActiveListings,
+                final.ActiveJoinAttempts,
+                final.ReplayMarkers,
+                final.ExpiryChurn,
+                final.MaintenanceSweeps,
+                soak.Cycles,
+                soak.Duration.TotalSeconds,
+                soak.PeakScheduledExpiryEntries,
+                soak.ManagedGrowthBytes,
+                soak.HandleGrowth,
+                restartStartedEmpty,
+                overloadWasTyped,
+                recoverySucceeded),
+            Failures = failures,
+            Passed = failures.Count == 0,
+        };
+        return Task.FromResult(report);
+    }
+
+    private static InMemoryEphemeralRendezvousStore CreateStore(
+        CapacityOptions options,
+        ManualClock clock) => new(
+        new EphemeralStoreOptions
+        {
+            MaxListings = options.Listings,
+            MaxPresenceBindings = options.Listings,
+            MaxJoinAttempts = options.Attempts,
+            MaxOutcomeReports = options.Attempts,
+            MaxIdempotencyEntries = options.Listings + options.Attempts + 1,
+        },
+        clock,
+        clock);
+
+    private static StoredListing CreateVisibleListing(
+        InMemoryEphemeralRendezvousStore store,
+        int sequence)
+    {
+        string owner = $"publisher-{sequence}";
+        SecretFingerprint leaseFingerprint = new($"lease-{sequence}");
+        SecretFingerprint presenceFingerprint = new($"presence-{sequence}");
+        ListingDefinition definition = new()
+        {
+            ListingId = new(Guid.NewGuid()),
+            LeaseId = new(Guid.NewGuid()),
+            Scope = Scope,
+            OwnerSubject = owner,
+            RegionId = new("eu-central"),
+            ProtocolVersion = ProtocolVersion,
+            BuildVersion = "1.0.0",
+            DisplayName = $"Capacity host {sequence}",
+            Visibility = ListingVisibility.Public,
+            TrustMode = PublisherTrustMode.ManagedDedicated,
+            CurrentPlayers = 1,
+            MaximumPlayers = 8,
+            Metadata = new Dictionary<string, string>(StringComparer.Ordinal),
+            LeaseFingerprint = leaseFingerprint,
+            HostPresenceHandle = new(Guid.NewGuid()),
+            HostPresenceFingerprint = presenceFingerprint,
+            CapabilityDerivationSalt = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
+        };
+        StoreResult<StoredListing> created = store.CreateListing(new(
+            $"register-{sequence}",
+            $"register-request-{sequence}",
+            definition));
+        RequireSuccess(created, "registration");
+        StoreResult<StoredListing> bound = store.BindHostPresence(new(
+            definition.HostPresenceHandle,
+            presenceFingerprint,
+            PublicEndpoint(10_000 + sequence % 50_000),
+            null));
+        RequireSuccess(bound, "host presence");
+        return bound.Value!;
+    }
+
+    private static CreateJoinAttemptCommand CreateAttempt(int sequence, StoredListing listing) => new()
+    {
+        IdempotencyOwner = $"client-{sequence}",
+        IdempotencyKey = $"join-{sequence}",
+        RequestFingerprint = $"join-request-{sequence}",
+        ClientSubject = $"client-{sequence}",
+        AttemptId = new(Guid.NewGuid()),
+        MediationHandle = new(Guid.NewGuid()),
+        Scope = Scope,
+        ListingId = listing.Definition.ListingId,
+        ProtocolVersion = ProtocolVersion,
+        HostCapabilityFingerprint = new($"host-capability-{sequence}"),
+        ClientCapabilityFingerprint = new($"client-capability-{sequence}"),
+        ConnectionTicketFingerprint = new($"ticket-{sequence}"),
+        CapabilityDerivationSalt = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
+    };
+
+    private static CapacityMeasurement MeasureConcurrentPunch(
+        InMemoryEphemeralRendezvousStore store,
+        List<CreateJoinAttemptCommand> attempts,
+        int samples)
+    {
+        ConcurrentBag<double> latencies = [];
+        Stopwatch total = Stopwatch.StartNew();
+        Parallel.ForEach(
+            Enumerable.Range(0, samples),
+            new ParallelOptions { MaxDegreeOfParallelism = Math.Min(64, Environment.ProcessorCount * 4) },
+            index =>
+            {
+                CreateJoinAttemptCommand attempt = attempts[index];
+                Stopwatch elapsed = Stopwatch.StartNew();
+                RequireSuccess(store.BindAttemptEndpoint(new(
+                    attempt.MediationHandle,
+                    AttemptPeerRole.Host,
+                    attempt.HostCapabilityFingerprint,
+                    PublicEndpoint(20_000 + index % 20_000),
+                    null)), "host punch");
+                RequireSuccess(store.BindAttemptEndpoint(new(
+                    attempt.MediationHandle,
+                    AttemptPeerRole.Client,
+                    attempt.ClientCapabilityFingerprint,
+                    PublicEndpoint(40_000 + index % 20_000),
+                    null)), "client punch");
+                RequireSuccess(store.ConsumeIntroduction(attempt.MediationHandle), "introduction");
+                latencies.Add(elapsed.Elapsed.TotalMilliseconds);
+            });
+        total.Stop();
+        return BuildMeasurement(
+            "simultaneous-punch-pairing",
+            latencies.ToArray(),
+            total.Elapsed,
+            budgetMilliseconds: 100,
+            minimumOperationsPerSecond: 2_000);
+    }
+
+    private static CapacityMeasurement Measure(
+        string operation,
+        int samples,
+        double budgetMilliseconds,
+        double minimumOperationsPerSecond,
+        Action<int> action)
+    {
+        double[] latencies = new double[samples];
+        Stopwatch total = Stopwatch.StartNew();
+        for (int index = 0; index < samples; index++)
+        {
+            long started = Stopwatch.GetTimestamp();
+            action(index);
+            latencies[index] = Stopwatch.GetElapsedTime(started).TotalMilliseconds;
+        }
+
+        total.Stop();
+        return BuildMeasurement(
+            operation,
+            latencies,
+            total.Elapsed,
+            budgetMilliseconds,
+            minimumOperationsPerSecond);
+    }
+
+    private static CapacityMeasurement BuildMeasurement(
+        string operation,
+        double[] latencies,
+        TimeSpan elapsed,
+        double budgetMilliseconds,
+        double minimumOperationsPerSecond)
+    {
+        Array.Sort(latencies);
+        double operationsPerSecond = latencies.Length / Math.Max(elapsed.TotalSeconds, 0.000_001);
+        double p95 = Percentile(latencies, 0.95);
+        return new(
+            operation,
+            latencies.Length,
+            Percentile(latencies, 0.50),
+            p95,
+            Percentile(latencies, 0.99),
+            operationsPerSecond,
+            minimumOperationsPerSecond,
+            budgetMilliseconds,
+            p95 <= budgetMilliseconds && operationsPerSecond >= minimumOperationsPerSecond);
+    }
+
+    private static double Percentile(double[] sorted, double percentile)
+    {
+        int index = Math.Clamp((int)Math.Ceiling(sorted.Length * percentile) - 1, 0, sorted.Length - 1);
+        return sorted[index];
+    }
+
+    private static SoakEvidence RunAcceleratedSoak(
+        CapacityOptions options,
+        List<string> failures)
+    {
+        GC.Collect();
+        GC.WaitForPendingFinalizers();
+        GC.Collect();
+        long managedBefore = GC.GetTotalMemory(forceFullCollection: true);
+        int handlesBefore = Process.GetCurrentProcess().HandleCount;
+        ManualClock clock = new();
+        CapacityOptions soakOptions = options with { Listings = 100, Attempts = 100 };
+        InMemoryEphemeralRendezvousStore store = CreateStore(soakOptions, clock);
+        Stopwatch elapsed = Stopwatch.StartNew();
+        int cycle = 0;
+        int peakScheduledExpiryEntries = 0;
+        while (cycle < options.SoakCycles
+               || elapsed.Elapsed < TimeSpan.FromSeconds(options.SoakSeconds))
+        {
+            StoredListing listing = CreateVisibleListing(store, cycle);
+            for (int refresh = 0; refresh < 10; refresh++)
+            {
+                clock.Advance(TimeSpan.FromTicks(1));
+                listing = RequireSuccess(store.RenewLease(new(
+                    listing.Definition.ListingId,
+                    listing.Definition.LeaseId,
+                    listing.Definition.LeaseFingerprint,
+                    listing.Definition.OwnerSubject,
+                    listing.Version)), "soak lease refresh");
+                listing = RequireSuccess(store.BindHostPresence(new(
+                    listing.Definition.HostPresenceHandle,
+                    listing.Definition.HostPresenceFingerprint,
+                    PublicEndpoint(10_000 + cycle % 50_000),
+                    null)), "soak presence refresh");
+            }
+
+            CreateJoinAttemptCommand attempt = CreateAttempt(cycle, listing);
+            RequireSuccess(store.CreateJoinAttempt(attempt), "soak join issuance");
+            RequireSuccess(store.ConsumeReplay(new("capacity-soak", $"replay-{cycle}")), "soak replay");
+            peakScheduledExpiryEntries = Math.Max(
+                peakScheduledExpiryEntries,
+                store.ScheduledExpiryEntryCount);
+            if (store.ScheduledExpiryEntryCount > 7)
+            {
+                failures.Add(
+                    $"Mutable deadline refresh grew the expiry queue to "
+                    + $"{store.ScheduledExpiryEntryCount} entries for one lifecycle.");
+                break;
+            }
+
+            clock.Advance(TimeSpan.FromSeconds(151));
+            EphemeralStoreSnapshot snapshot = store.GetSnapshot();
+            if (snapshot.ActiveListings != 0
+                || snapshot.ActiveJoinAttempts != 0
+                || snapshot.ReplayMarkers != 0
+                || snapshot.IdempotencyEntries != 0
+                || snapshot.RetainedOutcomeReports != 0)
+            {
+                failures.Add($"Accelerated soak retained state after cycle {cycle}.");
+                break;
+            }
+
+            cycle++;
+        }
+
+        elapsed.Stop();
+        GC.Collect();
+        GC.WaitForPendingFinalizers();
+        GC.Collect();
+        long managedGrowth = GC.GetTotalMemory(forceFullCollection: true) - managedBefore;
+        int handleGrowth = Process.GetCurrentProcess().HandleCount - handlesBefore;
+        if (managedGrowth > 67_108_864)
+        {
+            failures.Add($"Soak retained {managedGrowth} managed bytes; budget is 64 MiB.");
+        }
+
+        if (handleGrowth > 8)
+        {
+            failures.Add($"Soak retained {handleGrowth} process handles; budget is 8.");
+        }
+
+        return new(cycle, elapsed.Elapsed, peakScheduledExpiryEntries, managedGrowth, handleGrowth);
+    }
+
+    private static ObservedEndpoint PublicEndpoint(int port) =>
+        new(AddressFamilyKind.Ipv4, "203.0.113.10", port);
+
+    private static T RequireSuccess<T>(StoreResult<T> result, string operation)
+    {
+        if (!result.Succeeded)
+        {
+            throw new InvalidOperationException($"{operation} failed with {result.Code}.");
+        }
+
+        return result.Value!;
+    }
+
+    private static string ReadCpuModel()
+    {
+        const string cpuInfoPath = "/proc/cpuinfo";
+        if (!File.Exists(cpuInfoPath))
+        {
+            return "unavailable";
+        }
+
+        string? model = File.ReadLines(cpuInfoPath)
+            .FirstOrDefault(static line => line.StartsWith("model name", StringComparison.Ordinal));
+        int separator = model?.IndexOf(':') ?? -1;
+        return separator >= 0 ? model![(separator + 1)..].Trim() : "unavailable";
+    }
+
+    private static string ReadCgroupValue(string path) =>
+        File.Exists(path) ? File.ReadAllText(path).Trim() : "not-enforced";
+
+    private sealed class ManualClock : IWallClock, IMonotonicClock
+    {
+        public DateTimeOffset UtcNow { get; private set; } = DateTimeOffset.UtcNow;
+        public TimeSpan Elapsed { get; private set; }
+
+        public void Advance(TimeSpan duration)
+        {
+            UtcNow += duration;
+            Elapsed += duration;
+        }
+    }
+
+    private readonly record struct SoakEvidence(
+        int Cycles,
+        TimeSpan Duration,
+        int PeakScheduledExpiryEntries,
+        long ManagedGrowthBytes,
+        int HandleGrowth);
+}

tests/FinalFactory.Rendezvous.Capacity/FinalFactory.Rendezvous.Capacity.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <AssemblyName>FinalFactory.Rendezvous.Capacity</AssemblyName>
+    <RootNamespace>FinalFactory.Rendezvous.Capacity</RootNamespace>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="../../src/FinalFactory.Rendezvous.Contracts/FinalFactory.Rendezvous.Contracts.csproj" />
+    <ProjectReference Include="../../src/FinalFactory.Rendezvous.Server/FinalFactory.Rendezvous.Server.csproj" />
+  </ItemGroup>
+</Project>

tests/FinalFactory.Rendezvous.Capacity/Program.cs

@@ -0,0 +1,37 @@
+using System.Text.Json;
+
+namespace FinalFactory.Rendezvous.Capacity;
+
+internal static class Program
+{
+    private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web)
+    {
+        WriteIndented = true,
+    };
+
+    public static async Task<int> Main(string[] args)
+    {
+        CapacityOptions options;
+        try
+        {
+            options = CapacityOptions.Parse(args);
+        }
+        catch (ArgumentException exception)
+        {
+            Console.Error.WriteLine(exception.Message);
+            return 2;
+        }
+
+        CapacityReport report = await CapacityRunner.RunAsync(options).ConfigureAwait(false);
+        string json = JsonSerializer.Serialize(report, JsonOptions);
+        Console.WriteLine(json);
+        if (options.OutputPath is not null)
+        {
+            string fullPath = Path.GetFullPath(options.OutputPath);
+            Directory.CreateDirectory(Path.GetDirectoryName(fullPath)!);
+            await File.WriteAllTextAsync(fullPath, json + Environment.NewLine).ConfigureAwait(false);
+        }
+
+        return report.Passed ? 0 : 1;
+    }
+}

tests/FinalFactory.Rendezvous.Capacity/packages.lock.json

@@ -0,0 +1,39 @@
+{
+  "version": 2,
+  "dependencies": {
+    "net10.0": {
+      "finalfactory.rendezvous.contracts": {
+        "type": "Project"
+      },
+      "finalfactory.rendezvous.server": {
+        "type": "Project",
+        "dependencies": {
+          "FinalFactory.Rendezvous.Contracts": "[1.0.0, )",
+          "LiteNetLib": "[2.1.4, 2.1.4]",
+          "Microsoft.AspNetCore.OpenApi": "[10.0.9, )"
+        }
+      },
+      "LiteNetLib": {
+        "type": "CentralTransitive",
+        "requested": "[2.1.4, 2.1.4]",
+        "resolved": "2.1.4",
+        "contentHash": "KWlxvMw3Urpqj9joD96LRiK+LC62pQNs/zkXRJc+rHnxgkGp+vV703xzDrxRmv+V1YhCFfIGzs5nrVWtREIlyA=="
+      },
+      "Microsoft.AspNetCore.OpenApi": {
+        "type": "CentralTransitive",
+        "requested": "[10.0.9, )",
+        "resolved": "10.0.9",
+        "contentHash": "1ihb8FO9cGgEK1/m3CTtT/SfnynwmiZib0W2pcDVj3KSWk/Sca4VOXEtaptKQc582zpFrzTFiwkGRCglt6H+WQ==",
+        "dependencies": {
+          "Microsoft.OpenApi": "2.0.0"
+        }
+      },
+      "Microsoft.OpenApi": {
+        "type": "CentralTransitive",
+        "requested": "[2.7.5, )",
+        "resolved": "2.7.5",
+        "contentHash": "0FA67RSnRM4tcBKqiqVu/HPdZ9+QOKbmeRjxRUGTCjPU4C0bmUhd97Dso7Yild5P7nOV6GxJ2xrK0Kv/O9xp0w=="
+      }
+    }
+  }
+}

tests/FinalFactory.Rendezvous.Tests/Client/RendezvousClientIntegrationTests.cs

@@ -1,3 +1,6 @@
+using System.Diagnostics;
+using System.Net;
+using System.Net.Sockets;
 using FinalFactory.Rendezvous.Client;
 using FinalFactory.Rendezvous.Contracts;
 using FinalFactory.Rendezvous.Server.Abuse;
@@ -19,6 +22,49 @@ namespace FinalFactory.Rendezvous.Tests.Client;
 
 public sealed class RendezvousClientIntegrationTests
 {
+    [Fact]
+    public async Task RestartReturnsTypedUnavailabilityThenAllowsHostReregistration()
+    {
+        int port = ReserveTcpPort();
+        string address = $"http://127.0.0.1:{port}";
+        using HttpClient client = new() { BaseAddress = new Uri(address) };
+        RendezvousClientOptions noRetry = new()
+        {
+            MaximumSafeRetries = 0,
+            RequestTimeout = TimeSpan.FromSeconds(1),
+        };
+        ClientTestHost first = await ClientTestHost.StartAsync(address);
+        RendezvousPublisherClient publisher = new(client, noRetry);
+        RendezvousClientResult<PublishedSession> registered = await publisher.RegisterAsync(
+            CreateRegistration(100),
+            first.PublisherCredential);
+        PublishedSession initialSession = AssertSuccess(registered);
+        BindPresence(first, initialSession, 41_100);
+        RendezvousSessionBrowserClient browser = new(client, noRetry);
+        BrowseSessionsResponse beforeRestart = AssertSuccess(await browser.BrowseAsync(BrowseRequest()));
+        Assert.Equal(initialSession.ListingId, Assert.Single(beforeRestart.Items).ListingId);
+        Stopwatch restart = Stopwatch.StartNew();
+        await first.DisposeAsync();
+
+        RendezvousClientResult<BrowseSessionsResponse> unavailable = await browser.BrowseAsync(BrowseRequest());
+        Assert.False(unavailable.IsSuccess);
+        Assert.Equal(RendezvousErrorCode.ServiceUnavailable, unavailable.Error);
+
+        await using ClientTestHost second = await ClientTestHost.StartAsync(address);
+        RendezvousClientResult<PublishedSession> reregistered = await publisher.RegisterAsync(
+            CreateRegistration(101),
+            second.PublisherCredential);
+        PublishedSession replacementSession = AssertSuccess(reregistered);
+        Assert.NotEqual(initialSession.ListingId, replacementSession.ListingId);
+        BindPresence(second, replacementSession, 41_101);
+        BrowseSessionsResponse afterRestart = AssertSuccess(await browser.BrowseAsync(BrowseRequest()));
+        Assert.Equal(replacementSession.ListingId, Assert.Single(afterRestart.Items).ListingId);
+        Assert.DoesNotContain(afterRestart.Items, item => item.ListingId == initialSession.ListingId);
+        Assert.True(
+            restart.Elapsed < TimeSpan.FromSeconds(5),
+            $"Local restart and host re-registration took {restart.Elapsed}.");
+    }
+
     [Fact]
     public async Task PublisherAndBrowserClientsCompleteTheRealSessionLifecycleAndPaging()
     {
@@ -102,6 +148,27 @@ public sealed class RendezvousClientIntegrationTests
         return Assert.IsAssignableFrom<T>(result.Value);
     }
 
+    private static void BindPresence(ClientTestHost host, PublishedSession session, int port)
+    {
+        Assert.True(host.Capabilities.TryFingerprint(
+            session.HostPresenceCapability,
+            out SecretFingerprint fingerprint));
+        Assert.Equal(StoreResultCode.Success, host.Store.BindHostPresence(new(
+            session.HostPresenceHandle,
+            fingerprint,
+            new(AddressFamilyKind.Ipv4, "203.0.113.80", port),
+            null)).Code);
+    }
+
+    private static BrowseSessionsRequest BrowseRequest() => new()
+    {
+        GameId = new("space-game"),
+        EnvironmentId = new("production"),
+        RegionId = new("eu-central"),
+        ProtocolVersion = 7,
+        PageSize = 10,
+    };
+
     private static RegisterSessionRequest CreateRegistration(int index) => new()
     {
         IdempotencyKey = $"sdk-integration-{index}",
@@ -139,7 +206,7 @@ public sealed class RendezvousClientIntegrationTests
         internal EphemeralCapabilityIssuer Capabilities { get; }
         internal string PublisherCredential { get; }
 
-        internal static async Task<ClientTestHost> StartAsync()
+        internal static async Task<ClientTestHost> StartAsync(string? bindAddress = null)
         {
             ManualRendezvousClock clock = new(ProvisioningTestData.Now);
             EphemeralStoreOptions stateOptions = new();
@@ -153,7 +220,7 @@ public sealed class RendezvousClientIntegrationTests
             string credential = provisioning.Credentials.Issue(principal, clock.UtcNow);
 
             WebApplicationBuilder builder = WebApplication.CreateBuilder();
-            builder.WebHost.UseUrls("http://127.0.0.1:0");
+            builder.WebHost.UseUrls(bindAddress ?? "http://127.0.0.1:0");
             builder.Services.ConfigureHttpJsonOptions(static options =>
                 ContractJson.Configure(options.SerializerOptions));
             builder.Services.Configure<RouteHandlerOptions>(static options =>
@@ -180,10 +247,10 @@ public sealed class RendezvousClientIntegrationTests
             app.MapRendezvousContractEndpoints();
             await app.StartAsync();
             IServer server = app.Services.GetRequiredService<IServer>();
-            string address = Assert.Single(server.Features.Get<IServerAddressesFeature>()!.Addresses);
+            string serviceAddress = Assert.Single(server.Features.Get<IServerAddressesFeature>()!.Addresses);
             return new(
                 app,
-                new HttpClient { BaseAddress = new Uri(address) },
+                new HttpClient { BaseAddress = new Uri(serviceAddress) },
                 store,
                 capabilities,
                 credential);
@@ -196,4 +263,13 @@ public sealed class RendezvousClientIntegrationTests
             await _application.DisposeAsync();
         }
     }
+
+    private static int ReserveTcpPort()
+    {
+        TcpListener listener = new(IPAddress.Loopback, 0);
+        listener.Start();
+        int port = ((IPEndPoint)listener.LocalEndpoint).Port;
+        listener.Stop();
+        return port;
+    }
 }

tests/FinalFactory.Rendezvous.Tests/Contracts/ContractTestFiles.cs

@@ -1,30 +1,69 @@
+using System.Xml.Linq;
+
 namespace FinalFactory.Rendezvous.Tests.Contracts;
 
 internal static class ContractTestFiles
 {
     public static string Read(string fileName) => File
-        .ReadAllText(Path.Combine(Directory, fileName))
+        .ReadAllText(Path.Combine(DirectoryFor(fileName), fileName))
         .TrimEnd('\r', '\n');
 
     public static string Directory
+    {
+        get
+        {
+            return VersionedDirectory(Property("RendezvousMajorVersion"));
+        }
+    }
+
+    public static string OpenApiDocument
+    {
+        get
+        {
+            string httpVersion = Property("HttpContractVersion");
+            return Path.Combine(RepositoryRoot, $"docs/api/rendezvous-v{httpVersion}.json");
+        }
+    }
+
+    private static string DirectoryFor(string fileName)
+    {
+        string property = fileName switch
+        {
+            "client-public-api.txt" or "contracts-public-api.txt" => "RendezvousMajorVersion",
+            "connection-ticket.json" => "ConnectionTicketFormatVersion",
+            _ when fileName.EndsWith(".hex", StringComparison.Ordinal) => "UdpContractVersion",
+            _ when fileName.EndsWith(".json", StringComparison.Ordinal) => "HttpContractVersion",
+            _ => throw new InvalidOperationException($"No contract version dimension maps {fileName}."),
+        };
+        return VersionedDirectory(Property(property));
+    }
+
+    private static string VersionedDirectory(string version) => Path.Combine(
+        RepositoryRoot,
+        $"tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v{version}");
+
+    private static string Property(string name)
+    {
+        XDocument versions = XDocument.Load(Path.Combine(RepositoryRoot, "eng/Versions.props"));
+        return versions.Descendants(name).Single().Value;
+    }
+
+    private static string RepositoryRoot
     {
         get
         {
             DirectoryInfo? directory = new(AppContext.BaseDirectory);
             while (directory is not null)
             {
-                string solution = Path.Combine(directory.FullName, "Rendezvous.slnx");
+                if (File.Exists(Path.Combine(directory.FullName, "Rendezvous.slnx")))
-                if (File.Exists(solution))
                 {
-                    return Path.Combine(
+                    return directory.FullName;
-                        directory.FullName,
-                        "tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v1");
                 }
 
                 directory = directory.Parent;
             }
 
-            throw new DirectoryNotFoundException("Could not locate contract test data.");
+            throw new DirectoryNotFoundException("Could not locate repository root.");
         }
     }
 }

tests/FinalFactory.Rendezvous.Tests/Contracts/OpenApiCompatibilityTests.cs

@@ -40,12 +40,10 @@ public sealed class OpenApiCompatibilityTests
     ];
 
     [Fact]
-    public void GeneratedOpenApiContainsTheFrozenV1Surface()
+    public void GeneratedOpenApiContainsTheFrozenVersionedSurface()
     {
-        string path = Path.Combine(
+        using JsonDocument document = JsonDocument.Parse(
-            ContractTestFiles.Directory,
+            File.ReadAllText(ContractTestFiles.OpenApiDocument));
-            "../../../../../docs/api/rendezvous-v1.json");
-        using JsonDocument document = JsonDocument.Parse(File.ReadAllText(Path.GetFullPath(path)));
         JsonElement root = document.RootElement;
 
         Assert.Equal("3.1.1", root.GetProperty("openapi").GetString());

tests/FinalFactory.Rendezvous.Tests/Contracts/TraversalTokenCodecTests.cs

@@ -1,3 +1,4 @@
+using System.Text.Json;
 using FinalFactory.Rendezvous.Client;
 using FinalFactory.Rendezvous.Contracts;
 
@@ -22,6 +23,20 @@ public sealed class TraversalTokenCodecTests
         Assert.DoesNotContain(encoded, decoded.ToString(), StringComparison.Ordinal);
     }
 
+    [Fact]
+    public void ConnectionTicketMatchesTheVersionedV1Vector()
+    {
+        using JsonDocument vector = JsonDocument.Parse(ContractTestFiles.Read("connection-ticket.json"));
+        JsonElement root = vector.RootElement;
+        JoinAttemptId attemptId = new(Guid.Parse(root.GetProperty("attemptId").GetString()!));
+        string authenticator = root.GetProperty("derivedAuthenticator").GetString()!;
+
+        string ticket = NatIntroductionTokenCodec.Encode(attemptId, authenticator);
+
+        Assert.Equal(root.GetProperty("connectionTicket").GetString(), ticket);
+        Assert.Equal(root.GetProperty("digest").GetString(), NatIntroductionTokenCodec.ComputeDigest(ticket));
+    }
+
     [Fact]
     public void IntroductionTokenRejectsNonCanonicalOrAlteredFields()
     {

tests/FinalFactory.Rendezvous.Tests/Deployment/DeploymentOptionsTests.cs

@@ -0,0 +1,137 @@
+using FinalFactory.Rendezvous.Server.Abuse;
+using FinalFactory.Rendezvous.Server.Deployment;
+
+namespace FinalFactory.Rendezvous.Tests.Deployment;
+
+public sealed class DeploymentOptionsTests
+{
+    [Fact]
+    public void ProductionConfigurationAcceptsExplicitPublicEndpointsAndTrustBoundary()
+    {
+        DeploymentOptions options = ValidOptions();
+        AbuseProtectionOptions abuse = new()
+        {
+            TrustedProxyAddresses = ["192.0.2.10"],
+        };
+
+        IReadOnlyList<string> errors = options.ValidateProduction(
+            abuse,
+            "rendezvous.finalfactory.at");
+
+        Assert.Empty(errors);
+    }
+
+    [Fact]
+    public void ProductionConfigurationRejectsUnsafeAndAmbiguousDefaults()
+    {
+        DeploymentOptions options = new()
+        {
+            SingleActiveInstance = false,
+        };
+
+        IReadOnlyList<string> errors = options.ValidateProduction(
+            new AbuseProtectionOptions(),
+            "*");
+
+        Assert.Contains(errors, error => error.Contains("SingleActiveInstance", StringComparison.Ordinal));
+        Assert.Contains(errors, error => error.Contains("PublicHttpBaseUrl", StringComparison.Ordinal));
+        Assert.Contains(errors, error => error.Contains("PublicUdpHost", StringComparison.Ordinal));
+        Assert.Contains(errors, error => error.Contains("TrustedProxyAddresses", StringComparison.Ordinal));
+        Assert.Contains(errors, error => error.Contains("AllowedHosts", StringComparison.Ordinal));
+    }
+
+    [Theory]
+    [InlineData("http://rendezvous.example.com/")]
+    [InlineData("https://user@example.com/")]
+    [InlineData("https://rendezvous.example.com/path")]
+    [InlineData("https://localhost/")]
+    [InlineData("https://10.0.0.1/")]
+    [InlineData("https://192.0.2.10/")]
+    [InlineData("https://[::ffff:10.0.0.1]/")]
+    [InlineData("https://[ff02::1]/")]
+    [InlineData("https://rendezvous.invalid/")]
+    public void ProductionConfigurationRejectsUnsafeHttpEndpoint(string endpoint)
+    {
+        DeploymentOptions options = ValidOptions() with { PublicHttpBaseUrl = endpoint };
+
+        IReadOnlyList<string> errors = options.ValidateProduction(
+            new AbuseProtectionOptions { TrustedProxyAddresses = ["192.0.2.10"] },
+            "rendezvous.finalfactory.at");
+
+        Assert.Contains(errors, error => error.Contains("PublicHttpBaseUrl", StringComparison.Ordinal));
+    }
+
+    [Theory]
+    [InlineData("0.1.2.3")]
+    [InlineData("100.64.0.1")]
+    [InlineData("192.0.2.1")]
+    [InlineData("198.18.0.1")]
+    [InlineData("198.51.100.1")]
+    [InlineData("203.0.113.1")]
+    [InlineData("224.0.0.1")]
+    [InlineData("255.255.255.255")]
+    [InlineData("::ffff:192.168.1.1")]
+    [InlineData("2001:db8::1")]
+    [InlineData("ff02::1")]
+    [InlineData("rendezvous.example.com")]
+    [InlineData("rendezvous.home.arpa")]
+    [InlineData("rendezvous.alt")]
+    [InlineData("service.test")]
+    public void ProductionConfigurationRejectsNonPublicUdpEndpoint(string endpoint)
+    {
+        DeploymentOptions options = ValidOptions() with { PublicUdpHost = endpoint };
+
+        IReadOnlyList<string> errors = options.ValidateProduction(
+            new AbuseProtectionOptions { TrustedProxyAddresses = ["192.0.2.10"] },
+            "rendezvous.finalfactory.at");
+
+        Assert.Contains(errors, error => error.Contains("PublicUdpHost", StringComparison.Ordinal));
+    }
+
+    [Fact]
+    public void IsolatedSmokeTestRequiresExplicitPrivateEndpointOverride()
+    {
+        DeploymentOptions options = ValidOptions() with
+        {
+            PublicHttpBaseUrl = "https://localhost/",
+            PublicUdpHost = "127.0.0.1",
+            AllowPrivatePublicEndpoints = true,
+        };
+
+        IReadOnlyList<string> errors = options.ValidateProduction(
+            new AbuseProtectionOptions { TrustedProxyAddresses = ["127.0.0.1"] },
+            "localhost");
+
+        Assert.Empty(errors);
+    }
+
+    [Fact]
+    public void ProductionConfigurationRejectsInvalidPortsDeadlinesAndMismatchedHostFilter()
+    {
+        DeploymentOptions options = ValidOptions() with
+        {
+            PublicUdpPort = 0,
+            DrainDeadlineSeconds = 31,
+            MinimumDrainSeconds = 6,
+        };
+
+        IReadOnlyList<string> errors = options.ValidateProduction(
+            new AbuseProtectionOptions { TrustedProxyAddresses = ["192.0.2.10"] },
+            "different.finalfactory.at");
+
+        Assert.Contains(errors, error => error.Contains("PublicUdpPort", StringComparison.Ordinal));
+        Assert.Contains(errors, error => error.Contains("DrainDeadlineSeconds", StringComparison.Ordinal));
+        Assert.Contains(errors, error => error.Contains("MinimumDrainSeconds", StringComparison.Ordinal));
+        Assert.Contains(errors, error => error.Contains("exact host", StringComparison.Ordinal));
+    }
+
+    private static DeploymentOptions ValidOptions() => new()
+    {
+        PublicHttpBaseUrl = "https://rendezvous.finalfactory.at/",
+        PublicUdpHost = "rendezvous-udp.finalfactory.at",
+        PublicUdpPort = 9050,
+        DrainDeadlineSeconds = 10,
+        MinimumDrainSeconds = 1,
+        SingleActiveInstance = true,
+    };
+}

tests/FinalFactory.Rendezvous.Tests/Deployment/GracefulDrainServiceTests.cs

@@ -0,0 +1,149 @@
+using System.Diagnostics;
+using FinalFactory.Rendezvous.Server.Deployment;
+using FinalFactory.Rendezvous.Server.State;
+using FinalFactory.Rendezvous.Tests.State;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Options;
+
+namespace FinalFactory.Rendezvous.Tests.Deployment;
+
+public sealed class GracefulDrainServiceTests
+{
+    [Fact]
+    public async Task ShutdownRejectsNewWorkAndClearsStateAfterBoundedAttemptDeadline()
+    {
+        EphemeralStoreOptions stateOptions = new()
+        {
+            GracefulDrainLifetime = TimeSpan.FromSeconds(1),
+        };
+        EphemeralStateFixture fixture = new(stateOptions);
+        StoredListing listing = fixture.CreateVisibleListing(out _);
+        StoreResult<StoredJoinAttempt> attempt = fixture.Store.CreateJoinAttempt(
+            fixture.AttemptCommand(listing));
+        Assert.True(attempt.Succeeded);
+        using FakeApplicationLifetime lifetime = new();
+        using GracefulDrainService service = CreateService(fixture.Store, lifetime);
+        await service.StartAsync(CancellationToken.None);
+
+        Task stopping = Task.Run(lifetime.StopApplication);
+        await WaitUntilAsync(() => fixture.Store.IsDraining, TimeSpan.FromSeconds(1));
+        StoreResult<StoredListing> rejected = fixture.Store.CreateListing(fixture.ListingCommand());
+        long sweepsAfterAdmissionCheck = fixture.Store.MaintenanceSweepCount;
+        Stopwatch elapsed = Stopwatch.StartNew();
+        await stopping;
+        await service.StopAsync(CancellationToken.None);
+
+        Assert.Equal(StoreResultCode.Draining, rejected.Code);
+        Assert.Equal(sweepsAfterAdmissionCheck, fixture.Store.MaintenanceSweepCount);
+        Assert.InRange(elapsed.Elapsed, TimeSpan.FromMilliseconds(850), TimeSpan.FromSeconds(2));
+        Assert.False(fixture.Store.IsAvailable);
+        Assert.Equal(0, fixture.Store.GetSnapshot().ActiveJoinAttempts);
+        Assert.Equal(0, fixture.Store.GetSnapshot().ActiveListings);
+    }
+
+    [Fact]
+    public async Task ShutdownWithoutAttemptsStopsAfterTheConfiguredMinimumOnly()
+    {
+        EphemeralStateFixture fixture = new(new EphemeralStoreOptions
+        {
+            GracefulDrainLifetime = TimeSpan.FromSeconds(2),
+        });
+        fixture.CreateVisibleListing(out _);
+        using FakeApplicationLifetime lifetime = new();
+        DeploymentOptions options = new()
+        {
+            DrainDeadlineSeconds = 2,
+            MinimumDrainSeconds = 0,
+        };
+        using GracefulDrainService service = new(
+            fixture.Store,
+            lifetime,
+            Options.Create(options),
+            NullLogger<GracefulDrainService>.Instance);
+        await service.StartAsync(CancellationToken.None);
+
+        Stopwatch elapsed = Stopwatch.StartNew();
+        await service.StopAsync(CancellationToken.None);
+
+        Assert.True(elapsed.Elapsed < TimeSpan.FromMilliseconds(500));
+        Assert.False(fixture.Store.IsAvailable);
+        Assert.Equal(0, fixture.Store.GetSnapshot().ActiveListings);
+    }
+
+    [Fact]
+    public async Task ShutdownStopsWhenTheLastAttemptExpiresWithoutAFullStateSweep()
+    {
+        EphemeralStateFixture fixture = new(new EphemeralStoreOptions
+        {
+            JoinAttemptLifetime = TimeSpan.FromMilliseconds(100),
+            ConnectionTicketLifetime = TimeSpan.FromMilliseconds(50),
+            GracefulDrainLifetime = TimeSpan.FromSeconds(2),
+        });
+        StoredListing listing = fixture.CreateVisibleListing(out _);
+        Assert.True(fixture.Store.CreateJoinAttempt(fixture.AttemptCommand(listing)).Succeeded);
+        using FakeApplicationLifetime lifetime = new();
+        using GracefulDrainService service = new(
+            fixture.Store,
+            lifetime,
+            Options.Create(new DeploymentOptions
+            {
+                DrainDeadlineSeconds = 2,
+                MinimumDrainSeconds = 0,
+            }),
+            NullLogger<GracefulDrainService>.Instance);
+        await service.StartAsync(CancellationToken.None);
+
+        Task stopping = Task.Run(lifetime.StopApplication);
+        await WaitUntilAsync(() => fixture.Store.IsDraining, TimeSpan.FromSeconds(1));
+        long sweepsBeforeExpiry = fixture.Store.MaintenanceSweepCount;
+        fixture.Clock.Advance(TimeSpan.FromMilliseconds(150));
+        using CancellationTokenSource timeout = new(TimeSpan.FromSeconds(1));
+        await stopping.WaitAsync(timeout.Token);
+
+        Assert.Equal(sweepsBeforeExpiry, fixture.Store.MaintenanceSweepCount);
+        Assert.False(fixture.Store.IsAvailable);
+    }
+
+    private static GracefulDrainService CreateService(
+        InMemoryEphemeralRendezvousStore store,
+        IHostApplicationLifetime lifetime) => new(
+            store,
+            lifetime,
+            Options.Create(new DeploymentOptions
+            {
+                DrainDeadlineSeconds = 1,
+                MinimumDrainSeconds = 0,
+            }),
+            NullLogger<GracefulDrainService>.Instance);
+
+    private static async Task WaitUntilAsync(Func<bool> predicate, TimeSpan timeout)
+    {
+        Stopwatch elapsed = Stopwatch.StartNew();
+        while (!predicate())
+        {
+            Assert.True(elapsed.Elapsed < timeout, "The service did not enter drain in time.");
+            await Task.Delay(10);
+        }
+    }
+
+    private sealed class FakeApplicationLifetime : IHostApplicationLifetime, IDisposable
+    {
+        private readonly CancellationTokenSource _started = new();
+        private readonly CancellationTokenSource _stopping = new();
+        private readonly CancellationTokenSource _stopped = new();
+
+        public CancellationToken ApplicationStarted => _started.Token;
+        public CancellationToken ApplicationStopping => _stopping.Token;
+        public CancellationToken ApplicationStopped => _stopped.Token;
+
+        public void StopApplication() => _stopping.Cancel();
+
+        public void Dispose()
+        {
+            _started.Dispose();
+            _stopping.Dispose();
+            _stopped.Dispose();
+        }
+    }
+}

tests/FinalFactory.Rendezvous.Tests/Deployment/ProductionProcessTests.cs

@@ -0,0 +1,575 @@
+using System.Diagnostics;
+using System.Net;
+using System.Net.Sockets;
+using System.Security.Cryptography;
+
+namespace FinalFactory.Rendezvous.Tests.Deployment;
+
+public sealed class ProductionProcessTests
+{
+    [Fact]
+    public async Task SigtermDrainsThenReleasesHttpAndUdpSockets()
+    {
+        if (!OperatingSystem.IsLinux())
+        {
+            return;
+        }
+
+        int httpPort = ReserveTcpPort();
+        int udpPort = ReserveUdpPort();
+        string secretPath = Path.Combine(
+            Path.GetTempPath(),
+            $"rendezvous-process-secret-{Guid.NewGuid():N}");
+        await File.WriteAllBytesAsync(secretPath, RandomNumberGenerator.GetBytes(32));
+        Process? process = null;
+        try
+        {
+            ProcessStartInfo startInfo = CreateStartInfo(httpPort, udpPort, secretPath);
+            process = Process.Start(startInfo)
+                ?? throw new InvalidOperationException("The production server process did not start.");
+            Task<string> standardOutput = process.StandardOutput.ReadToEndAsync();
+            Task<string> standardError = process.StandardError.ReadToEndAsync();
+
+            await WaitForReadyAsync(httpPort, process, TimeSpan.FromSeconds(10));
+            AssertUdpPortIsBound(udpPort);
+
+            Stopwatch shutdown = Stopwatch.StartNew();
+            ProcessStartInfo signalInfo = new()
+            {
+                FileName = "/bin/kill",
+                UseShellExecute = false,
+                ArgumentList =
+                {
+                    "-TERM",
+                    process.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+                },
+            };
+            using (Process signal = Process.Start(signalInfo)
+                   ?? throw new InvalidOperationException("Could not send SIGTERM."))
+            {
+                await signal.WaitForExitAsync();
+                Assert.Equal(0, signal.ExitCode);
+            }
+
+            using CancellationTokenSource timeout = new(TimeSpan.FromSeconds(6));
+            await process.WaitForExitAsync(timeout.Token);
+            string output = await standardOutput;
+            string error = await standardError;
+            Assert.True(
+                process.ExitCode == 0,
+                $"Server exited with {process.ExitCode}. stdout: {output} stderr: {error}");
+            Assert.InRange(shutdown.Elapsed, TimeSpan.FromMilliseconds(700), TimeSpan.FromSeconds(5));
+            AssertTcpPortIsReleased(httpPort);
+            AssertUdpPortIsReleased(udpPort);
+
+            process.Dispose();
+            process = null;
+            Stopwatch replacementReady = Stopwatch.StartNew();
+            ProcessStartInfo replacementInfo = CreateStartInfo(httpPort, udpPort, secretPath);
+            process = Process.Start(replacementInfo)
+                ?? throw new InvalidOperationException("The replacement production process did not start.");
+            Task<string> replacementOutput = process.StandardOutput.ReadToEndAsync();
+            Task<string> replacementError = process.StandardError.ReadToEndAsync();
+            await WaitForReadyAsync(httpPort, process, TimeSpan.FromSeconds(15));
+            Assert.True(
+                replacementReady.Elapsed < TimeSpan.FromSeconds(15),
+                $"Replacement readiness took {replacementReady.Elapsed}.");
+            AssertUdpPortIsBound(udpPort);
+
+            await SendSigtermAsync(process);
+            using CancellationTokenSource replacementTimeout = new(TimeSpan.FromSeconds(6));
+            await process.WaitForExitAsync(replacementTimeout.Token);
+            string replacementFinalOutput = await replacementOutput;
+            string replacementFinalError = await replacementError;
+            Assert.True(
+                process.ExitCode == 0,
+                $"Replacement exited with {process.ExitCode}. "
+                + $"stdout: {replacementFinalOutput} stderr: {replacementFinalError}");
+            AssertTcpPortIsReleased(httpPort);
+            AssertUdpPortIsReleased(udpPort);
+        }
+        finally
+        {
+            if (process is not null)
+            {
+                if (!process.HasExited)
+                {
+                    process.Kill(entireProcessTree: true);
+                    await process.WaitForExitAsync();
+                }
+
+                process.Dispose();
+            }
+
+            File.Delete(secretPath);
+        }
+    }
+
+    [Fact]
+    public async Task ProductionTransportSoakKeepsHandlesMemoryAndSocketsBounded()
+    {
+        if (!OperatingSystem.IsLinux())
+        {
+            return;
+        }
+
+        int httpPort = ReserveTcpPort();
+        int udpPort = ReserveUdpPort();
+        string secretPath = Path.Combine(
+            Path.GetTempPath(),
+            $"rendezvous-transport-soak-secret-{Guid.NewGuid():N}");
+        await File.WriteAllBytesAsync(secretPath, RandomNumberGenerator.GetBytes(32));
+        Process? process = null;
+        try
+        {
+            process = Process.Start(CreateStartInfo(httpPort, udpPort, secretPath))
+                ?? throw new InvalidOperationException("The production soak process did not start.");
+            Task<string> standardOutput = process.StandardOutput.ReadToEndAsync();
+            Task<string> standardError = process.StandardError.ReadToEndAsync();
+            await WaitForReadyAsync(httpPort, process, TimeSpan.FromSeconds(10));
+            process.Refresh();
+            int baselineHandles = process.HandleCount;
+            long baselineWorkingSet = process.WorkingSet64;
+            int peakHandles = baselineHandles;
+            byte[] invalidDatagram = RandomNumberGenerator.GetBytes(64);
+            IPEndPoint udpEndpoint = new(IPAddress.Loopback, udpPort);
+            using HttpClient client = new() { Timeout = TimeSpan.FromSeconds(1) };
+            using UdpClient udp = new();
+            Stopwatch soak = Stopwatch.StartNew();
+            int cycles = 0;
+            int accepted = 0;
+            int shed = 0;
+            while (soak.Elapsed < TimeSpan.FromSeconds(10))
+            {
+                using HttpResponseMessage response = await client.GetAsync(
+                    $"http://127.0.0.1:{httpPort}/health/live");
+                if (response.StatusCode == HttpStatusCode.OK)
+                {
+                    accepted++;
+                }
+                else
+                {
+                    Assert.Equal(HttpStatusCode.TooManyRequests, response.StatusCode);
+                    shed++;
+                }
+
+                await udp.SendAsync(invalidDatagram, udpEndpoint);
+                cycles++;
+                if (cycles % 100 == 0)
+                {
+                    process.Refresh();
+                    peakHandles = Math.Max(peakHandles, process.HandleCount);
+                }
+            }
+
+            Assert.True(cycles >= 100, $"Transport soak completed only {cycles} cycles.");
+            Assert.True(accepted > 0, "Transport soak never admitted a health request.");
+            Assert.True(shed > 0, "Transport soak never exercised typed HTTP load shedding.");
+            await Task.Delay(TimeSpan.FromSeconds(2));
+            using (HttpResponseMessage recovered = await client.GetAsync(
+                       $"http://127.0.0.1:{httpPort}/health/live"))
+            {
+                Assert.Equal(HttpStatusCode.OK, recovered.StatusCode);
+            }
+
+            process.Refresh();
+            Assert.InRange(peakHandles, 0, baselineHandles + 32);
+            Assert.InRange(process.HandleCount, 0, baselineHandles + 16);
+            Assert.InRange(process.WorkingSet64, 0, baselineWorkingSet + 67_108_864);
+            AssertUdpPortIsBound(udpPort);
+
+            await SendSigtermAsync(process);
+            using CancellationTokenSource shutdownTimeout = new(TimeSpan.FromSeconds(6));
+            await process.WaitForExitAsync(shutdownTimeout.Token);
+            string output = await standardOutput;
+            string error = await standardError;
+            Assert.True(
+                process.ExitCode == 0,
+                $"Transport soak process failed. stdout: {output} stderr: {error}");
+            AssertTcpPortIsReleased(httpPort);
+            AssertUdpPortIsReleased(udpPort);
+        }
+        finally
+        {
+            await StopProcessTreeAsync(process);
+            File.Delete(secretPath);
+        }
+    }
+
+    [Fact]
+    public async Task DocumentedSmokeScriptReachesHttpAndAuthenticatedUdpFlow()
+    {
+        if (!OperatingSystem.IsLinux())
+        {
+            return;
+        }
+
+        string root = RepositoryRoot();
+        int httpPort = ReserveTcpPort();
+        int udpPort = ReserveUdpPort();
+        string secretPath = Path.Combine(
+            Path.GetTempPath(),
+            $"rendezvous-smoke-secret-{Guid.NewGuid():N}");
+        await File.WriteAllBytesAsync(secretPath, RandomNumberGenerator.GetBytes(32));
+        Process? server = null;
+        Process? smoke = null;
+        try
+        {
+            DateTimeOffset now = DateTimeOffset.UtcNow;
+            string assembly = typeof(Program).Assembly.Location;
+            ProcessStartInfo serverInfo = new()
+            {
+                FileName = "dotnet",
+                WorkingDirectory = root,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                UseShellExecute = false,
+                ArgumentList =
+                {
+                    assembly,
+                    "--contentRoot", Path.Combine(root, "deploy", "compose"),
+                    "--Rendezvous:Provisioning:SigningKeys:0:SecretReference", $"file:{secretPath}",
+                    "--Rendezvous:Provisioning:SigningKeys:0:NotBefore", now.AddHours(-1).ToString("O"),
+                    "--Rendezvous:Provisioning:SigningKeys:0:SignUntil", now.AddHours(1).ToString("O"),
+                    "--Rendezvous:Provisioning:SigningKeys:0:VerifyUntil", now.AddHours(2).ToString("O"),
+                    "--Rendezvous:Udp:Port", udpPort.ToString(System.Globalization.CultureInfo.InvariantCulture),
+                    "--Rendezvous:Deployment:PublicUdpPort", udpPort.ToString(System.Globalization.CultureInfo.InvariantCulture),
+                },
+            };
+            serverInfo.Environment["ASPNETCORE_ENVIRONMENT"] = "Production";
+            serverInfo.Environment["ASPNETCORE_URLS"] = $"http://127.0.0.1:{httpPort}";
+            server = Process.Start(serverInfo)
+                ?? throw new InvalidOperationException("The smoke server process did not start.");
+            Task<string> serverOutput = server.StandardOutput.ReadToEndAsync();
+            Task<string> serverError = server.StandardError.ReadToEndAsync();
+            await WaitForReadyAsync(httpPort, server, TimeSpan.FromSeconds(10));
+
+            ProcessStartInfo smokeInfo = new()
+            {
+                FileName = Path.Combine(root, "scripts", "smoke-deployment.sh"),
+                WorkingDirectory = root,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                UseShellExecute = false,
+            };
+            smokeInfo.Environment.Remove("RENDEZVOUS_PUBLISHER_CREDENTIAL");
+            smokeInfo.Environment["RENDEZVOUS_SMOKE_HTTP_URL"] = $"http://127.0.0.1:{httpPort}/";
+            smokeInfo.Environment["RENDEZVOUS_SMOKE_UDP_ENDPOINT"] = $"127.0.0.1:{udpPort}";
+            smokeInfo.Environment["RENDEZVOUS_SMOKE_LOCAL_KEY"] = secretPath;
+            smokeInfo.Environment["RENDEZVOUS_SMOKE_TIMEOUT_SECONDS"] = "15";
+            smokeInfo.Environment["RENDEZVOUS_SMOKE_CONFIGURATION"] = BuildConfiguration();
+            smoke = Process.Start(smokeInfo)
+                ?? throw new InvalidOperationException("The deployment smoke process did not start.");
+            Task<string> smokeOutput = smoke.StandardOutput.ReadToEndAsync();
+            Task<string> smokeError = smoke.StandardError.ReadToEndAsync();
+            using (CancellationTokenSource timeout = new(TimeSpan.FromSeconds(25)))
+            {
+                await smoke.WaitForExitAsync(timeout.Token);
+            }
+
+            string output = await smokeOutput;
+            string error = await smokeError;
+            Assert.True(
+                smoke.ExitCode == 0,
+                $"Smoke exited with {smoke.ExitCode}. stdout: {output} stderr: {error}");
+            Assert.Contains("deployment smoke passed", output, StringComparison.OrdinalIgnoreCase);
+            Assert.DoesNotContain("rv1.", output, StringComparison.Ordinal);
+            Assert.DoesNotContain("rv1.", error, StringComparison.Ordinal);
+
+            await SendSigtermAsync(server);
+            using CancellationTokenSource shutdownTimeout = new(TimeSpan.FromSeconds(6));
+            await server.WaitForExitAsync(shutdownTimeout.Token);
+            string finalServerOutput = await serverOutput;
+            string finalServerError = await serverError;
+            Assert.True(
+                server.ExitCode == 0,
+                $"Smoke server failed. stdout: {finalServerOutput} stderr: {finalServerError}");
+        }
+        finally
+        {
+            await StopProcessTreeAsync(smoke);
+            if (server is not null)
+            {
+                await StopProcessTreeAsync(server);
+            }
+
+            File.Delete(secretPath);
+        }
+    }
+
+    [Theory]
+    [InlineData("missing-deployment", "PublicHttpBaseUrl")]
+    [InlineData("wildcard-host", "AllowedHosts")]
+    [InlineData("reserved-endpoint", "public DNS name or address")]
+    [InlineData("missing-key", "process-test-key")]
+    public async Task UnsafeProductionConfigurationFailsBeforeBinding(
+        string scenario,
+        string expectedDiagnostic)
+    {
+        if (!OperatingSystem.IsLinux())
+        {
+            return;
+        }
+
+        int httpPort = ReserveTcpPort();
+        int udpPort = ReserveUdpPort();
+        string secretPath = Path.Combine(
+            Path.GetTempPath(),
+            $"rendezvous-rejected-secret-{Guid.NewGuid():N}");
+        await File.WriteAllBytesAsync(secretPath, RandomNumberGenerator.GetBytes(32));
+        Process? process = null;
+        try
+        {
+            ProcessStartInfo startInfo = scenario == "missing-deployment"
+                ? CreateBareProductionStartInfo(httpPort)
+                : CreateStartInfo(httpPort, udpPort, secretPath);
+            if (scenario == "wildcard-host")
+            {
+                startInfo.Environment["AllowedHosts"] = "*";
+            }
+            else if (scenario == "reserved-endpoint")
+            {
+                startInfo.Environment["Rendezvous__Deployment__AllowPrivatePublicEndpoints"] = "false";
+                startInfo.Environment["Rendezvous__Deployment__PublicHttpBaseUrl"] = "https://192.0.2.1/";
+                startInfo.Environment["Rendezvous__Deployment__PublicUdpHost"] = "203.0.113.1";
+                startInfo.Environment["AllowedHosts"] = "192.0.2.1";
+            }
+            else if (scenario == "missing-key")
+            {
+                File.Delete(secretPath);
+            }
+
+            process = Process.Start(startInfo)
+                ?? throw new InvalidOperationException("The rejected production process did not start.");
+            Task<string> standardOutput = process.StandardOutput.ReadToEndAsync();
+            Task<string> standardError = process.StandardError.ReadToEndAsync();
+            using CancellationTokenSource timeout = new(TimeSpan.FromSeconds(6));
+            await process.WaitForExitAsync(timeout.Token);
+            string diagnostic = $"{await standardOutput}\n{await standardError}";
+
+            Assert.NotEqual(0, process.ExitCode);
+            Assert.Contains(expectedDiagnostic, diagnostic, StringComparison.OrdinalIgnoreCase);
+            AssertTcpPortIsReleased(httpPort);
+            AssertUdpPortIsReleased(udpPort);
+        }
+        finally
+        {
+            await StopProcessTreeAsync(process);
+            File.Delete(secretPath);
+        }
+    }
+
+    private static ProcessStartInfo CreateStartInfo(int httpPort, int udpPort, string secretPath)
+    {
+        string assembly = typeof(Program).Assembly.Location;
+        ProcessStartInfo info = new()
+        {
+            FileName = "dotnet",
+            WorkingDirectory = Path.GetDirectoryName(assembly)!,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+        };
+        info.ArgumentList.Add(assembly);
+        Dictionary<string, string> settings = new(StringComparer.Ordinal)
+        {
+            ["ASPNETCORE_ENVIRONMENT"] = "Production",
+            ["ASPNETCORE_URLS"] = $"http://127.0.0.1:{httpPort}",
+            ["AllowedHosts"] = "127.0.0.1",
+            ["Rendezvous__Deployment__PublicHttpBaseUrl"] = "https://127.0.0.1/",
+            ["Rendezvous__Deployment__PublicUdpHost"] = "127.0.0.1",
+            ["Rendezvous__Deployment__PublicUdpPort"] = udpPort.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            ["Rendezvous__Deployment__DrainDeadlineSeconds"] = "3",
+            ["Rendezvous__Deployment__MinimumDrainSeconds"] = "1",
+            ["Rendezvous__Deployment__SingleActiveInstance"] = "true",
+            ["Rendezvous__Deployment__AllowPrivatePublicEndpoints"] = "true",
+            ["Rendezvous__Udp__ListenAddress"] = "127.0.0.1",
+            ["Rendezvous__Udp__Port"] = udpPort.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            ["Rendezvous__AbuseProtection__TrustedProxyAddresses__0"] = "127.0.0.1",
+            ["Rendezvous__Provisioning__Issuer"] = "rendezvous-process-test",
+            ["Rendezvous__Provisioning__Audience"] = "rendezvous-service",
+            ["Rendezvous__Provisioning__ClockSkewSeconds"] = "30",
+            ["Rendezvous__Provisioning__SigningKeys__0__KeyId"] = "process-test-key",
+            ["Rendezvous__Provisioning__SigningKeys__0__SecretReference"] = $"file:{secretPath}",
+            ["Rendezvous__Provisioning__SigningKeys__0__CredentialKinds__0"] = "DedicatedPublisher",
+            ["Rendezvous__Provisioning__SigningKeys__0__GameId"] = "space-game",
+            ["Rendezvous__Provisioning__SigningKeys__0__EnvironmentId"] = "process-test",
+            ["Rendezvous__Provisioning__SigningKeys__0__NotBefore"] = DateTimeOffset.UtcNow.AddHours(-1).ToString("O"),
+            ["Rendezvous__Provisioning__SigningKeys__0__SignUntil"] = DateTimeOffset.UtcNow.AddDays(1).ToString("O"),
+            ["Rendezvous__Provisioning__SigningKeys__0__VerifyUntil"] = DateTimeOffset.UtcNow.AddDays(2).ToString("O"),
+            ["Rendezvous__Provisioning__Games__0__GameId"] = "space-game",
+            ["Rendezvous__Provisioning__Games__0__EnvironmentId"] = "process-test",
+            ["Rendezvous__Provisioning__Games__0__Enabled"] = "true",
+            ["Rendezvous__Provisioning__Games__0__ProtocolVersions__0"] = "1",
+            ["Rendezvous__Provisioning__Games__0__Regions__0"] = "local",
+            ["Rendezvous__Provisioning__Games__0__VisibilityModes__0"] = "Public",
+            ["Rendezvous__Provisioning__Games__0__PublisherTrustModes__0"] = "ManagedDedicated",
+            ["Rendezvous__Provisioning__Games__0__MetadataMaxBytes"] = "512",
+            ["Rendezvous__Provisioning__Games__0__MetadataMaxKeys"] = "0",
+            ["Rendezvous__Provisioning__Games__0__MaxListingsPerPrincipal"] = "10",
+            ["Rendezvous__Provisioning__Games__0__MaxAnonymousListingsPerAddress"] = "0",
+            ["Rendezvous__Provisioning__Games__0__MaxActiveJoinAttempts"] = "100",
+            ["Rendezvous__Provisioning__Games__0__FallbackPolicy"] = "Disabled",
+        };
+        foreach ((string key, string value) in settings)
+        {
+            info.Environment[key] = value;
+        }
+
+        return info;
+    }
+
+    private static ProcessStartInfo CreateBareProductionStartInfo(int httpPort)
+    {
+        string assembly = typeof(Program).Assembly.Location;
+        ProcessStartInfo info = new()
+        {
+            FileName = "dotnet",
+            WorkingDirectory = Path.GetDirectoryName(assembly)!,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+        };
+        info.ArgumentList.Add(assembly);
+        foreach (string key in info.Environment.Keys
+                     .Where(static key => key.StartsWith("Rendezvous__", StringComparison.OrdinalIgnoreCase))
+                     .ToArray())
+        {
+            info.Environment.Remove(key);
+        }
+
+        info.Environment["ASPNETCORE_ENVIRONMENT"] = "Production";
+        info.Environment["ASPNETCORE_URLS"] = $"http://127.0.0.1:{httpPort}";
+        info.Environment["AllowedHosts"] = "*";
+        return info;
+    }
+
+    private static async Task StopProcessTreeAsync(Process? process)
+    {
+        if (process is null)
+        {
+            return;
+        }
+
+        try
+        {
+            if (!process.HasExited)
+            {
+                process.Kill(entireProcessTree: true);
+                using CancellationTokenSource timeout = new(TimeSpan.FromSeconds(3));
+                await process.WaitForExitAsync(timeout.Token);
+            }
+        }
+        finally
+        {
+            process.Dispose();
+        }
+    }
+
+    private static async Task SendSigtermAsync(Process process)
+    {
+        ProcessStartInfo signalInfo = new()
+        {
+            FileName = "/bin/kill",
+            UseShellExecute = false,
+            ArgumentList =
+            {
+                "-TERM",
+                process.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            },
+        };
+        using Process signal = Process.Start(signalInfo)
+            ?? throw new InvalidOperationException("Could not send SIGTERM.");
+        await signal.WaitForExitAsync();
+        Assert.Equal(0, signal.ExitCode);
+    }
+
+    private static string BuildConfiguration()
+    {
+        string path = typeof(ProductionProcessTests).Assembly.Location;
+        return path.Contains(
+            $"{Path.DirectorySeparatorChar}Release{Path.DirectorySeparatorChar}",
+            StringComparison.Ordinal)
+            ? "Release"
+            : "Debug";
+    }
+
+    private static string RepositoryRoot()
+    {
+        DirectoryInfo? directory = new(AppContext.BaseDirectory);
+        while (directory is not null && !File.Exists(Path.Combine(directory.FullName, "Rendezvous.slnx")))
+        {
+            directory = directory.Parent;
+        }
+
+        return directory?.FullName
+            ?? throw new InvalidOperationException("Could not locate the repository root.");
+    }
+
+    private static async Task WaitForReadyAsync(int port, Process process, TimeSpan timeout)
+    {
+        using HttpClient client = new() { Timeout = TimeSpan.FromMilliseconds(500) };
+        Stopwatch elapsed = Stopwatch.StartNew();
+        while (elapsed.Elapsed < timeout)
+        {
+            if (process.HasExited)
+            {
+                throw new InvalidOperationException("The production server exited before readiness.");
+            }
+
+            try
+            {
+                using HttpResponseMessage response = await client.GetAsync(
+                    $"http://127.0.0.1:{port}/health/ready");
+                if (response.StatusCode == HttpStatusCode.OK)
+                {
+                    return;
+                }
+            }
+            catch (HttpRequestException)
+            {
+            }
+            catch (TaskCanceledException)
+            {
+            }
+
+            await Task.Delay(50);
+        }
+
+        throw new TimeoutException("The production server did not become ready.");
+    }
+
+    private static int ReserveTcpPort()
+    {
+        TcpListener listener = new(IPAddress.Loopback, 0);
+        listener.Start();
+        int port = ((IPEndPoint)listener.LocalEndpoint).Port;
+        listener.Stop();
+        return port;
+    }
+
+    private static int ReserveUdpPort()
+    {
+        using UdpClient client = new(new IPEndPoint(IPAddress.Loopback, 0));
+        return ((IPEndPoint)client.Client.LocalEndPoint!).Port;
+    }
+
+    private static void AssertUdpPortIsBound(int port)
+    {
+        using Socket socket = new(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+        Assert.Throws<SocketException>(() => socket.Bind(new IPEndPoint(IPAddress.Loopback, port)));
+    }
+
+    private static void AssertTcpPortIsReleased(int port)
+    {
+        TcpListener listener = new(IPAddress.Loopback, port);
+        listener.Start();
+        listener.Stop();
+    }
+
+    private static void AssertUdpPortIsReleased(int port)
+    {
+        using Socket socket = new(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+        socket.Bind(new IPEndPoint(IPAddress.Loopback, port));
+    }
+}

tests/FinalFactory.Rendezvous.Tests/Operations/OperatorEndpointTests.cs

@@ -101,6 +101,16 @@ public sealed class OperatorEndpointTests
             tenant.GameId == "space-game"
             && tenant.EnvironmentId == "production"
             && tenant.Status == "enabled");
+        Assert.Equal("1.0.0", operatorStatus.Compatibility.ServerVersion);
+        Assert.Equal("1.0.0", operatorStatus.Compatibility.MinimumClientVersion);
+        Assert.Equal(1, operatorStatus.Compatibility.MaximumClientMajorVersion);
+        Assert.Equal([1], operatorStatus.Compatibility.HttpContractVersions);
+        Assert.Equal([1], operatorStatus.Compatibility.UdpContractVersions);
+        Assert.Equal([1], operatorStatus.Compatibility.ConnectionTicketFormatVersions);
+        Assert.Equal(2, operatorStatus.Compatibility.LiteNetLibMajorVersion);
+        Assert.Equal(
+            "exact-per-tenant",
+            operatorStatus.Compatibility.GameplayProtocolCompatibility);
         Assert.Contains(operatorStatus.SigningKeys, static key =>
             key.KeyId == OperatorTestHost.OperatorKeyId
             && key.Status == "signing"

tests/FinalFactory.Rendezvous.Tests/Provisioning/ProductionSecretProviderTests.cs

@@ -0,0 +1,66 @@
+using System.Security.Cryptography;
+using FinalFactory.Rendezvous.Server.Provisioning;
+
+namespace FinalFactory.Rendezvous.Tests.Provisioning;
+
+public sealed class ProductionSecretProviderTests : IDisposable
+{
+    private readonly List<string> _paths = [];
+
+    [Fact]
+    public void ReadsBoundedSecretFromAbsoluteReadOnlyFile()
+    {
+        byte[] expected = RandomNumberGenerator.GetBytes(32);
+        string path = CreateSecretFile(expected);
+        EnvironmentSecretProvider provider = new();
+
+        bool found = provider.TryGetSecret($"file:{path}", out SecretMaterial? material);
+
+        Assert.True(found);
+        using (material)
+        {
+            Assert.Equal(expected, material!.CopyBytes());
+        }
+    }
+
+    [Fact]
+    public void RejectsRelativeSymlinkEmptyAndOversizedFileReferences()
+    {
+        string empty = CreateSecretFile([]);
+        string oversized = CreateSecretFile(new byte[4097]);
+        string target = CreateSecretFile(RandomNumberGenerator.GetBytes(32));
+        string symlink = Path.Combine(Path.GetTempPath(), $"rendezvous-secret-link-{Guid.NewGuid():N}");
+        EnvironmentSecretProvider provider = new();
+
+        Assert.False(provider.TryGetSecret("file:relative-secret", out _));
+        Assert.False(provider.TryGetSecret($"file:{empty}", out _));
+        Assert.False(provider.TryGetSecret($"file:{oversized}", out _));
+        Assert.False(provider.TryGetSecret("file:/tmp/invalid\0path", out _));
+        if (!OperatingSystem.IsWindows())
+        {
+            File.CreateSymbolicLink(symlink, target);
+            _paths.Add(symlink);
+            Assert.False(provider.TryGetSecret($"file:{symlink}", out _));
+        }
+    }
+
+    public void Dispose()
+    {
+        foreach (string path in _paths)
+        {
+            File.Delete(path);
+        }
+    }
+
+    private string CreateSecretFile(byte[] bytes)
+    {
+        string path = Path.Combine(Path.GetTempPath(), $"rendezvous-secret-{Guid.NewGuid():N}");
+        File.WriteAllBytes(path, bytes);
+        if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS() || OperatingSystem.IsFreeBSD())
+        {
+            File.SetUnixFileMode(path, UnixFileMode.UserRead);
+        }
+        _paths.Add(path);
+        return path;
+    }
+}

tests/FinalFactory.Rendezvous.Tests/Release/ReleaseCompatibilityTests.cs

@@ -0,0 +1,185 @@
+using System.Reflection;
+using System.Text.Json;
+using System.Xml.Linq;
+using FinalFactory.Rendezvous.Client;
+using FinalFactory.Rendezvous.Contracts;
+using FinalFactory.Rendezvous.Server.Operations;
+
+namespace FinalFactory.Rendezvous.Tests.Release;
+
+public sealed class ReleaseCompatibilityTests
+{
+    [Fact]
+    public void CentralVersionsRuntimeWindowAndPublishedMatrixStayAligned()
+    {
+        string root = FindRepositoryRoot();
+        XDocument versions = XDocument.Load(Path.Combine(root, "eng/Versions.props"));
+        string releaseVersion = Property(versions, "RendezvousVersion");
+        int releaseMajor = int.Parse(Property(versions, "RendezvousMajorVersion"), System.Globalization.CultureInfo.InvariantCulture);
+        string[] numericVersion = releaseVersion.Split(['-', '+'], 2)[0].Split('.');
+        Assert.Equal(releaseMajor, int.Parse(numericVersion[0], System.Globalization.CultureInfo.InvariantCulture));
+        Assert.Equal(Property(versions, "RendezvousMinorVersion"), numericVersion[1]);
+        Assert.Equal(Property(versions, "RendezvousPatchVersion"), numericVersion[2]);
+        int httpVersion = int.Parse(Property(versions, "HttpContractVersion"), System.Globalization.CultureInfo.InvariantCulture);
+        int udpVersion = int.Parse(Property(versions, "UdpContractVersion"), System.Globalization.CultureInfo.InvariantCulture);
+        int ticketVersion = int.Parse(Property(versions, "ConnectionTicketFormatVersion"), System.Globalization.CultureInfo.InvariantCulture);
+
+        Assert.Equal(releaseVersion, typeof(RendezvousPublisherClient).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()!.InformationalVersion.Split('+')[0]);
+        Assert.Equal(releaseVersion, typeof(ContractLimits).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()!.InformationalVersion.Split('+')[0]);
+        Assert.Equal(ContractLimits.ContractVersion, httpVersion);
+
+        OperatorCompatibilityResponse runtime = ReleaseCompatibility.CreateResponse();
+        Assert.Equal(releaseVersion, runtime.ServerVersion);
+        Assert.Equal(Property(versions, "MinimumClientVersion"), runtime.MinimumClientVersion);
+        Assert.Equal(int.Parse(Property(versions, "MaximumClientMajorVersion"), System.Globalization.CultureInfo.InvariantCulture), runtime.MaximumClientMajorVersion);
+        Assert.Equal([httpVersion], runtime.HttpContractVersions);
+        Assert.Equal([udpVersion], runtime.UdpContractVersions);
+        Assert.Equal([ticketVersion], runtime.ConnectionTicketFormatVersions);
+        Assert.Equal(int.Parse(Property(versions, "LiteNetLibMajorVersion"), System.Globalization.CultureInfo.InvariantCulture), runtime.LiteNetLibMajorVersion);
+        Assert.Equal("exact-per-tenant", runtime.GameplayProtocolCompatibility);
+
+        using JsonDocument matrix = JsonDocument.Parse(File.ReadAllText(Path.Combine(root, "docs/releases/compatibility.json")));
+        JsonElement document = matrix.RootElement;
+        Assert.Equal(releaseVersion, document.GetProperty("release").GetString());
+        Assert.Equal(releaseVersion, document.GetProperty("packages").GetProperty("FinalFactory.Rendezvous.Client").GetString());
+        Assert.Equal(releaseVersion, document.GetProperty("packages").GetProperty("FinalFactory.Rendezvous.Contracts").GetString());
+        Assert.Equal(runtime.MinimumClientVersion, document.GetProperty("server").GetProperty("minimumClientVersion").GetString());
+        Assert.Equal(runtime.MaximumClientMajorVersion, document.GetProperty("server").GetProperty("maximumClientMajorVersion").GetInt32());
+        Assert.Equal(httpVersion, Assert.Single(document.GetProperty("contracts").GetProperty("http").EnumerateArray()).GetInt32());
+        Assert.Equal(udpVersion, Assert.Single(document.GetProperty("contracts").GetProperty("udp").EnumerateArray()).GetInt32());
+        Assert.Equal(ticketVersion, Assert.Single(document.GetProperty("contracts").GetProperty("connectionTicket").EnumerateArray()).GetInt32());
+        Assert.Equal(runtime.GameplayProtocolCompatibility, document.GetProperty("contracts").GetProperty("gameplay").GetString());
+        Assert.Equal("LiteNetLib", document.GetProperty("transport").GetProperty("package").GetString());
+        Assert.Equal(Property(versions, "LiteNetLibVersion"), document.GetProperty("transport").GetProperty("version").GetString());
+        Assert.Equal(runtime.LiteNetLibMajorVersion, document.GetProperty("transport").GetProperty("major").GetInt32());
+
+        foreach ((string consumer, string fixture) in new[]
+                 {
+                     ("SpaceGame", "spacegame/SpaceGame.Rendezvous.Consumer.csproj"),
+                     ("Unscouted", "unscouted/Unscouted.Rendezvous.Consumer.csproj"),
+                 })
+        {
+            XDocument fixtureProject = XDocument.Load(Path.Combine(root, "tests/consumers", fixture));
+            Assert.Equal(
+                fixtureProject.Descendants("TargetFramework").Single().Value,
+                document.GetProperty("consumers").GetProperty(consumer).GetString());
+        }
+
+        string snapshots = Path.Combine(root, $"tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v{releaseMajor}");
+        Assert.True(File.Exists(Path.Combine(snapshots, "client-public-api.txt")));
+        Assert.True(File.Exists(Path.Combine(snapshots, "contracts-public-api.txt")));
+        Assert.True(File.Exists(Path.Combine(root, $"docs/api/rendezvous-v{httpVersion}.json")));
+    }
+
+    [Fact]
+    public void ReleaseDefinitionIsImmutableTagOnlyAndDocumentsRequiredNotes()
+    {
+        string root = FindRepositoryRoot();
+        XDocument versions = XDocument.Load(Path.Combine(root, "eng/Versions.props"));
+        string releaseVersion = Property(versions, "RendezvousVersion");
+        string workflow = File.ReadAllText(Path.Combine(root, ".gitea/workflows/release.yml"));
+        Assert.Contains("tags:", workflow, StringComparison.Ordinal);
+        Assert.Contains("RELEASE_TOKEN", workflow, StringComparison.Ordinal);
+        Assert.Contains("RELEASE_USERNAME", workflow, StringComparison.Ordinal);
+        Assert.Contains("COSIGN_PRIVATE_KEY", workflow, StringComparison.Ordinal);
+        Assert.DoesNotContain(":latest", workflow, StringComparison.OrdinalIgnoreCase);
+        Assert.DoesNotContain("skip-duplicate", workflow, StringComparison.OrdinalIgnoreCase);
+        Assert.Contains("check-compatibility.sh", workflow, StringComparison.Ordinal);
+        Assert.Contains("--platform linux/amd64", workflow, StringComparison.Ordinal);
+        Assert.Contains("ignore-unfixed: false", workflow, StringComparison.Ordinal);
+        Assert.Contains("format: spdx-json", workflow, StringComparison.Ordinal);
+        Assert.Contains("normalize-container-sbom", workflow, StringComparison.Ordinal);
+        Assert.Contains("finalize-release-candidate.sh", workflow, StringComparison.Ordinal);
+        Assert.Contains("verify-real-consumers.sh", workflow, StringComparison.Ordinal);
+        Assert.Contains("RENDEZVOUS_RELEASE_BUILDER", workflow, StringComparison.Ordinal);
+        Assert.Contains("--image-id", workflow, StringComparison.Ordinal);
+
+        string publisher = File.ReadAllText(Path.Combine(root, "scripts/publish-release.sh"));
+        Assert.Contains("expected_image_id", publisher, StringComparison.Ordinal);
+        Assert.Contains("finalize-signing-ready-release.sh", publisher, StringComparison.Ordinal);
+
+        XDocument packages = XDocument.Load(Path.Combine(root, "Directory.Packages.props"));
+        XElement liteNetLib = Assert.Single(packages.Descendants("PackageVersion"), static item => (string?)item.Attribute("Include") == "LiteNetLib");
+        Assert.Equal("[$(LiteNetLibVersion)]", (string?)liteNetLib.Attribute("Version"));
+
+        string changelog = File.ReadAllText(Path.Combine(root, "CHANGELOG.md"));
+        Assert.Contains("### Compatibility", changelog, StringComparison.Ordinal);
+        Assert.Contains("### Security and configuration", changelog, StringComparison.Ordinal);
+        Assert.Contains("### Migration", changelog, StringComparison.Ordinal);
+        Assert.DoesNotContain($"{releaseVersion} - Unreleased", changelog, StringComparison.Ordinal);
+
+        foreach (string consumer in new[] { "spacegame", "unscouted" })
+        {
+            string consumerDirectory = Path.Combine(root, "tests/consumers", consumer);
+            string projectPath = Assert.Single(Directory.GetFiles(consumerDirectory, "*.csproj"));
+            XDocument consumerProject = XDocument.Load(projectPath);
+            XElement[] references = consumerProject.Descendants("PackageReference")
+                .Where(static item => ((string?)item.Attribute("Include"))?.StartsWith("FinalFactory.Rendezvous.", StringComparison.Ordinal) == true)
+                .ToArray();
+            Assert.Equal(2, references.Length);
+            Assert.All(references, static reference =>
+                Assert.Equal("[$(RendezvousPackageVersion)]", (string?)reference.Attribute("Version")));
+
+            Assert.Equal(
+                "false",
+                consumerProject.Descendants("RestorePackagesWithLockFile").Single().Value);
+        }
+
+        XDocument unscouted = XDocument.Load(Path.Combine(
+            root,
+            "tests/consumers/unscouted/Unscouted.Rendezvous.Consumer.csproj"));
+        XElement directTransport = Assert.Single(
+            unscouted.Descendants("PackageReference"),
+            static item => (string?)item.Attribute("Include") == "LiteNetLib");
+        Assert.Equal("[2.1.4]", (string?)directTransport.Attribute("Version"));
+
+        using JsonDocument consumers = JsonDocument.Parse(
+            File.ReadAllText(Path.Combine(root, "eng/consumer-revisions.json")));
+        JsonElement[] pinnedConsumers = consumers.RootElement.GetProperty("consumers")
+            .EnumerateArray()
+            .ToArray();
+        Assert.Equal(
+            ["SpaceGame", "Unscouted"],
+            pinnedConsumers.Select(static item => item.GetProperty("name").GetString()!).ToArray());
+        Assert.All(pinnedConsumers, static item =>
+            Assert.Matches("^[0-9a-f]{40}$", item.GetProperty("revision").GetString()));
+    }
+
+    [Fact]
+    public void ServerSourceManifestIsCompleteSortedAndDeterministic()
+    {
+        string root = FindRepositoryRoot();
+        string projectDirectory = Path.Combine(root, "src/FinalFactory.Rendezvous.Server");
+        XDocument project = XDocument.Load(Path.Combine(projectDirectory, "FinalFactory.Rendezvous.Server.csproj"));
+        string[] declared = project.Descendants("Compile")
+            .Select(static item => (string)item.Attribute("Include")!)
+            .ToArray();
+        string[] actual = Directory.GetFiles(projectDirectory, "*.cs", SearchOption.AllDirectories)
+            .Where(static path => !path.Contains($"{Path.DirectorySeparatorChar}bin{Path.DirectorySeparatorChar}", StringComparison.Ordinal)
+                && !path.Contains($"{Path.DirectorySeparatorChar}obj{Path.DirectorySeparatorChar}", StringComparison.Ordinal))
+            .Select(path => Path.GetRelativePath(projectDirectory, path).Replace(Path.DirectorySeparatorChar, '/'))
+            .Order(StringComparer.Ordinal)
+            .ToArray();
+
+        Assert.Equal(actual, declared);
+    }
+
+    private static string Property(XDocument document, string name) =>
+        document.Descendants(name).Single().Value;
+
+    private static string FindRepositoryRoot()
+    {
+        DirectoryInfo? directory = new(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            if (File.Exists(Path.Combine(directory.FullName, "Rendezvous.slnx")))
+            {
+                return directory.FullName;
+            }
+
+            directory = directory.Parent;
+        }
+
+        throw new DirectoryNotFoundException("Could not locate repository root.");
+    }
+}

tests/FinalFactory.Rendezvous.Tests/State/InMemoryEphemeralRendezvousStoreTests.cs

@@ -411,6 +411,92 @@ public sealed class InMemoryEphemeralRendezvousStoreTests
         Assert.True(fixture.Store.CreateJoinAttempt(attempt).Succeeded);
         Assert.Equal(StoreResultCode.CapacityExceeded, fixture.Store.CreateJoinAttempt(
             fixture.AttemptCommand(listing, "client-quota-2") with { ScopeAttemptLimit = 1 }).Code);
+
+        fixture.Clock.Advance(TimeSpan.FromSeconds(30));
+        Assert.True(fixture.Store.BindHostPresence(new(
+            first.Listing.HostPresenceHandle,
+            first.Listing.HostPresenceFingerprint,
+            EphemeralStateFixture.PublicEndpoint(42_101),
+            null)).Succeeded);
+        Assert.True(fixture.Store.CreateJoinAttempt(
+            fixture.AttemptCommand(listing, "client-quota-3") with { ScopeAttemptLimit = 1 }).Succeeded);
+    }
+
+    [Fact]
+    public void RemovingAListingReleasesItsConstantTimeOwnerQuota()
+    {
+        EphemeralStateFixture fixture = new();
+        CreateListingCommand first = fixture.ListingCommand(owner: "publisher-quota") with
+        {
+            OwnerListingLimit = 1,
+        };
+        CreateListingCommand second = fixture.ListingCommand(owner: "publisher-quota") with
+        {
+            OwnerListingLimit = 1,
+        };
+        StoreResult<StoredListing> created = fixture.Store.CreateListing(first);
+        Assert.True(created.Succeeded);
+        Assert.Equal(StoreResultCode.CapacityExceeded, fixture.Store.CreateListing(second).Code);
+
+        Assert.True(fixture.Store.DeleteListing(new(
+            first.Listing.ListingId,
+            first.Listing.LeaseId,
+            first.Listing.LeaseFingerprint,
+            first.Listing.OwnerSubject)).Succeeded);
+        Assert.True(fixture.Store.CreateListing(second).Succeeded);
+    }
+
+    [Fact]
+    public void RepeatedMutableDeadlineRefreshesKeepOneScheduledEntryPerKey()
+    {
+        EphemeralStateFixture fixture = new();
+        StoredListing listing = fixture.CreateVisibleListing(out _);
+
+        for (int iteration = 0; iteration < 10_000; iteration++)
+        {
+            fixture.Clock.Advance(TimeSpan.FromTicks(1));
+            StoreResult<StoredListing> renewed = fixture.Store.RenewLease(new(
+                listing.Definition.ListingId,
+                listing.Definition.LeaseId,
+                listing.Definition.LeaseFingerprint,
+                listing.Definition.OwnerSubject,
+                listing.Version));
+            Assert.True(renewed.Succeeded, $"Renewal {iteration} failed with {renewed.Code}.");
+            listing = renewed.Value!;
+            StoreResult<StoredListing> presence = fixture.Store.BindHostPresence(new(
+                listing.Definition.HostPresenceHandle,
+                listing.Definition.HostPresenceFingerprint,
+                EphemeralStateFixture.PublicEndpoint(42_200),
+                null));
+            Assert.True(presence.Succeeded, $"Presence {iteration} failed with {presence.Code}.");
+            StoreResult<int> revoked = fixture.Store.RevokePrincipal(
+                "repeated-revocation",
+                TimeSpan.FromMinutes(1));
+            Assert.True(revoked.Succeeded, $"Revocation {iteration} failed with {revoked.Code}.");
+        }
+
+        Assert.Equal(4, fixture.Store.ScheduledExpiryEntryCount);
+        fixture.Clock.Advance(TimeSpan.FromSeconds(19));
+        Assert.True(fixture.Store.GetListing(listing.Definition.ListingId, true).Succeeded);
+        Assert.Equal(4, fixture.Store.ScheduledExpiryEntryCount);
+    }
+
+    [Fact]
+    public void RepeatedPrincipalRevocationCanExtendButCannotShortenProtection()
+    {
+        EphemeralStateFixture fixture = new();
+        const string subject = "protected-publisher";
+
+        Assert.True(fixture.Store.RevokePrincipal(subject, TimeSpan.FromMinutes(10)).Succeeded);
+        fixture.Clock.Advance(TimeSpan.FromSeconds(1));
+        Assert.True(fixture.Store.RevokePrincipal(subject, TimeSpan.FromSeconds(1)).Succeeded);
+        fixture.Clock.Advance(TimeSpan.FromSeconds(2));
+        Assert.Equal(
+            StoreResultCode.Revoked,
+            fixture.Store.CreateListing(fixture.ListingCommand(owner: subject)).Code);
+
+        fixture.Clock.Advance(TimeSpan.FromSeconds(597));
+        Assert.True(fixture.Store.CreateListing(fixture.ListingCommand(owner: subject)).Succeeded);
     }
 
     [Fact]

tests/FinalFactory.Rendezvous.Tests/TestClient/TestClientProcessIntegrationTests.cs

@@ -666,15 +666,30 @@ public sealed class TestClientProcessIntegrationTests
     private static Dictionary<string, string> ServerEnvironment(
         string signingKey,
         DateTimeOffset now,
-        string listenAddress)
+        string listenAddress,
+        string? readinessAddress)
     {
+        string advertisedAddress = readinessAddress ?? listenAddress;
+        string allowedHosts = string.Join(
+            ';',
+            new[] { advertisedAddress, listenAddress, "127.0.0.1", "localhost" }
+                .Distinct(StringComparer.OrdinalIgnoreCase));
         Dictionary<string, string> values = new(StringComparer.Ordinal)
         {
             ["ASPNETCORE_ENVIRONMENT"] = "Production",
             ["ASPNETCORE_URLS"] = $"http://{listenAddress}:0",
+            ["AllowedHosts"] = allowedHosts,
+            ["Rendezvous__Deployment__PublicHttpBaseUrl"] = $"https://{advertisedAddress}/",
+            ["Rendezvous__Deployment__PublicUdpHost"] = advertisedAddress,
+            ["Rendezvous__Deployment__PublicUdpPort"] = "9050",
+            ["Rendezvous__Deployment__DrainDeadlineSeconds"] = "3",
+            ["Rendezvous__Deployment__MinimumDrainSeconds"] = "1",
+            ["Rendezvous__Deployment__SingleActiveInstance"] = "true",
+            ["Rendezvous__Deployment__AllowPrivatePublicEndpoints"] = "true",
             ["Rendezvous__Udp__ListenAddress"] = listenAddress,
             ["Rendezvous__Udp__Port"] = "0",
             ["Rendezvous__Udp__PollIntervalMilliseconds"] = "1",
+            ["Rendezvous__AbuseProtection__TrustedProxyAddresses__0"] = "127.0.0.1",
             ["Rendezvous__Provisioning__Issuer"] = "rendezvous-process-test",
             ["Rendezvous__Provisioning__Audience"] = "rendezvous-process-test-client",
             ["Rendezvous__Provisioning__ClockSkewSeconds"] = "5",
@@ -1346,7 +1361,11 @@ public sealed class TestClientProcessIntegrationTests
             string signingKeyText = Convert.ToBase64String(signingKey);
             string publisherCredential = IssuePublisherCredential(signingKey, now);
             CryptographicOperations.ZeroMemory(signingKey);
-            Dictionary<string, string> environment = ServerEnvironment(signingKeyText, now, listenAddress);
+            Dictionary<string, string> environment = ServerEnvironment(
+                signingKeyText,
+                now,
+                listenAddress,
+                readinessAddress);
             ProcessCapture server = processNamespace is null
                 ? Start(serverAssembly, [], environment)
                 : StartInNamespace(processNamespace, serverAssembly, [], environment);

tests/FinalFactory.Rendezvous.Tests/TestData/Contracts/v1/connection-ticket.json

@@ -0,0 +1,6 @@
+{
+  "attemptId": "00000000-0000-0000-0000-000000000301",
+  "derivedAuthenticator": "TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT",
+  "connectionTicket": "AAAAAAAAAAAAAAAAAAADAU000000000000000000000",
+  "digest": "d6yCrbIOzwKoaOZQ8A9eggclDY0yzmhJH36FDz4L7wE"
+}

tests/FinalFactory.Rendezvous.Tests/packages.lock.json

@@ -97,7 +97,7 @@
         "type": "Project",
         "dependencies": {
           "FinalFactory.Rendezvous.Contracts": "[1.0.0, )",
-          "LiteNetLib": "[2.1.4, )"
+          "LiteNetLib": "[2.1.4, 2.1.4]"
         }
       },
       "finalfactory.rendezvous.contracts": {
@@ -107,7 +107,7 @@
         "type": "Project",
         "dependencies": {
           "FinalFactory.Rendezvous.Contracts": "[1.0.0, )",
-          "LiteNetLib": "[2.1.4, )",
+          "LiteNetLib": "[2.1.4, 2.1.4]",
           "Microsoft.AspNetCore.OpenApi": "[10.0.9, )"
         }
       },
@@ -116,12 +116,12 @@
         "dependencies": {
           "FinalFactory.Rendezvous.Client": "[1.0.0, )",
           "FinalFactory.Rendezvous.Contracts": "[1.0.0, )",
-          "LiteNetLib": "[2.1.4, )"
+          "LiteNetLib": "[2.1.4, 2.1.4]"
         }
       },
       "LiteNetLib": {
         "type": "CentralTransitive",
-        "requested": "[2.1.4, )",
+        "requested": "[2.1.4, 2.1.4]",
         "resolved": "2.1.4",
         "contentHash": "KWlxvMw3Urpqj9joD96LRiK+LC62pQNs/zkXRJc+rHnxgkGp+vV703xzDrxRmv+V1YhCFfIGzs5nrVWtREIlyA=="
       },

tests/consumers/spacegame/Program.cs

@@ -0,0 +1,8 @@
+using FinalFactory.Rendezvous.Client;
+using FinalFactory.Rendezvous.Contracts;
+using LiteNetLib;
+
+Console.WriteLine(
+    $"SpaceGame consumer: contract={ContractLimits.ContractVersion}, "
+    + $"client={typeof(RendezvousClientOptions).Assembly.GetName().Version}, "
+    + $"transport={typeof(NetManager).Assembly.GetName().Version}");

tests/consumers/spacegame/SpaceGame.Rendezvous.Consumer.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ManagePackageVersionsCentrally>false</ManagePackageVersionsCentrally>
+    <RestorePackagesWithLockFile>false</RestorePackagesWithLockFile>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="FinalFactory.Rendezvous.Client" Version="[$(RendezvousPackageVersion)]" />
+    <PackageReference Include="FinalFactory.Rendezvous.Contracts" Version="[$(RendezvousPackageVersion)]" />
+  </ItemGroup>
+</Project>

tests/consumers/unscouted/Program.cs

@@ -0,0 +1,8 @@
+using FinalFactory.Rendezvous.Client;
+using FinalFactory.Rendezvous.Contracts;
+using LiteNetLib;
+
+Console.WriteLine(
+    $"Unscouted consumer: contract={ContractLimits.ContractVersion}, "
+    + $"client={typeof(RendezvousClientOptions).Assembly.GetName().Version}, "
+    + $"transport={typeof(NetManager).Assembly.GetName().Version}");

tests/consumers/unscouted/Unscouted.Rendezvous.Consumer.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ManagePackageVersionsCentrally>false</ManagePackageVersionsCentrally>
+    <RestorePackagesWithLockFile>false</RestorePackagesWithLockFile>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="FinalFactory.Rendezvous.Client" Version="[$(RendezvousPackageVersion)]" />
+    <PackageReference Include="FinalFactory.Rendezvous.Contracts" Version="[$(RendezvousPackageVersion)]" />
+    <PackageReference Include="LiteNetLib" Version="[2.1.4]" />
+  </ItemGroup>
+</Project>