fix: rust starter kit refresh + ci

.github/workflows/build-and-push-engine.yaml

@@ -1,9 +1,8 @@
 name: Build and Push Bomberland Engine
 
-# Public repo: this runs on GitHub-hosted runners (ubuntu-latest), never the
-# self-hosted homeserver runners, so untrusted fork PRs can't execute on our
-# infrastructure. Pull requests build only (no registry login, no push); the
-# image is pushed to Docker Hub only on push to master.
+# Runs on GitHub-hosted runners (ubuntu-latest). Pull requests build only
+# (no registry login, no push); the image is pushed to Docker Hub only on
+# push to master.
 
 on:
     # Every merge/commit to master builds and pushes the engine image.

.github/workflows/test-go-agent.yaml

@@ -1,8 +1,6 @@
 name: Test Go Starter Kit
 
-# Public repo: this runs on GitHub-hosted runners (ubuntu-latest), never the
-# self-hosted homeserver runners, so untrusted fork PRs can't execute on our
-# infrastructure.
+# Runs on GitHub-hosted runners (ubuntu-latest).
 #
 # The engine's JSON schema is the source of truth for the wire protocol. This
 # workflow validates the Go starter kit's fixtures against that schema, and is

.github/workflows/test-rust-agent.yaml

@@ -0,0 +1,72 @@
+name: Test Rust Starter Kit
+
+# Runs on GitHub-hosted runners (ubuntu-latest).
+#
+# The engine's JSON schema is the source of truth for the wire protocol. This
+# workflow validates the Rust starter kit's fixtures against that schema, and is
+# triggered whenever the schema changes — so a protocol update to the engine
+# surfaces any drift in the Rust kit immediately.
+
+on:
+    push:
+        branches:
+            - master
+    pull_request:
+        branches:
+            - master
+        paths:
+            - "agents/rust/**"
+            - "engine/bomberland-engine/src/runtime-validation/validation.schema.json"
+            - ".github/workflows/test-rust-agent.yaml"
+    workflow_dispatch:
+
+concurrency:
+    group: test-rust-agent-${{ github.ref }}
+    cancel-in-progress: true
+
+env:
+    ENGINE_SCHEMA: engine/bomberland-engine/src/runtime-validation/validation.schema.json
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        timeout-minutes: 20
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v4
+
+            - name: Install stable Rust
+              run: |
+                  rustup toolchain install stable --profile minimal --no-self-update
+                  rustup default stable
+                  rustc --version
+
+            - name: Cache cargo
+              uses: actions/cache@v4
+              with:
+                  path: |
+                      ~/.cargo/registry
+                      ~/.cargo/git
+                      agents/rust/target
+                  key: cargo-${{ runner.os }}-${{ hashFiles('agents/rust/Cargo.lock') }}
+                  restore-keys: cargo-${{ runner.os }}-
+
+            # The engine schema is the source of truth. Fail if the kit's bundled copy has
+            # drifted from it — that copy is what the Docker build and standalone clones use,
+            # since they don't have the engine tree available.
+            - name: Check bundled schema is in sync with engine
+              run: |
+                  if ! cmp -s "$ENGINE_SCHEMA" agents/rust/validation.schema.json; then
+                    echo "::error::agents/rust/validation.schema.json is out of sync with $ENGINE_SCHEMA"
+                    echo "Re-sync with: cp $ENGINE_SCHEMA agents/rust/validation.schema.json"
+                    diff -u agents/rust/validation.schema.json "$ENGINE_SCHEMA" || true
+                    exit 1
+                  fi
+
+            # Validate fixtures against the engine's live schema (not just the bundled copy),
+            # so fixture/protocol drift fails CI even before the copy is re-synced.
+            - name: Run Rust tests against engine schema
+              working-directory: agents/rust
+              env:
+                  BOMBERLAND_SCHEMA_PATH: ${{ github.workspace }}/engine/bomberland-engine/src/runtime-validation/validation.schema.json
+              run: cargo test --locked

README.md

@@ -47,7 +47,7 @@ docker-compose up --abort-on-container-exit --force-recreate
 | TypeScript-fwd      | [Link](https://github.com/CoderOneHQ/bomberland/tree/master/agents/typescript) | Includes example for using forward model simulator | ❌          | Coder One                               |
 | Go                  | [Link](https://github.com/CoderOneHQ/bomberland/tree/master/agents/go)         | Basic Go starter                                   | ✅          | [dtitov](https://github.com/dtitov)     |
 | C++                 | [Link](https://github.com/CoderOneHQ/bomberland/tree/master/agents/cpp)        | Basic C++ starter                                  | ✅          | [jfbogusz](https://github.com/jfbogusz) |
-| Rust                | [Link](https://github.com/CoderOneHQ/bomberland/tree/master/agents/rust)       | Basic Rust starter                                 | ❌          | [K-JBoon](https://github.com/K-JBoon)   |
+| Rust                | [Link](https://github.com/CoderOneHQ/bomberland/tree/master/agents/rust)       | Basic Rust starter                                 | ✅          | [K-JBoon](https://github.com/K-JBoon)   |
 
 ## Discussion and Questions