add ci check for generated python

.github/workflows/rust-ci.yml

@@ -65,6 +65,26 @@ jobs:
       - name: cargo fmt
         run: cargo fmt -- --config imports_granularity=Item --check
 
+  schema_fixtures:
+    name: App-server schema fixtures
+    runs-on: ubuntu-24.04
+    needs: changed
+    if: ${{ needs.changed.outputs.codex == 'true' || needs.changed.outputs.workflows == 'true' || github.event_name == 'push' }}
+    defaults:
+      run:
+        working-directory: codex-rs
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.11"
+      - uses: astral-sh/setup-uv@v6
+      - uses: dtolnay/rust-toolchain@1.93.0
+      - name: Regenerate app-server schema fixtures
+        run: cargo run -p codex-app-server-protocol --bin write_schema_fixtures
+      - name: Check vendored schema fixtures are up to date
+        run: git diff --exit-code -- app-server-protocol/schema
+
   cargo_shear:
     name: cargo shear
     runs-on: ubuntu-24.04
@@ -200,6 +220,10 @@ jobs:
         with:
           targets: ${{ matrix.target }}
           components: clippy
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.11"
+      - uses: astral-sh/setup-uv@v6
 
       - if: ${{ matrix.target == 'x86_64-unknown-linux-musl' || matrix.target == 'aarch64-unknown-linux-musl'}}
         name: Use hermetic Cargo home (musl)