Unity MCP CI Test Improvements (#452)

* Update github-repo-stats.yml

* Server: refine shutdown logic per bot feedback\n- Parameterize _force_exit(code) and use timers with args\n- Consistent behavior on BrokenPipeError (no immediate exit)\n- Exit code 1 on unexpected exceptions\n\nTests: restore telemetry module after disabling to avoid bleed-over

* Revert "Server: refine shutdown logic per bot feedback\n- Parameterize _force_exit(code) and use timers with args\n- Consistent behavior on BrokenPipeError (no immediate exit)\n- Exit code 1 on unexpected exceptions\n\nTests: restore telemetry module after disabling to avoid bleed-over"

This reverts commit 74d35d3.

* Add fork-only Unity tests workflow and guard upstream run

* Move fork Unity tests workflow to root

* Fix MCP server install step in NL suite workflow

* Harden NL suite prompts for deterministic anchors

* update claude haiku version for NL/T tests

* Fix CI: share unity-mcp status dir

* update yaml

* Add Unity bridge debug step in CI

* Fail fast when Unity MCP status file missing

* Allow Unity local share writable for MCP status

* Mount Unity cache rw and dump Editor log for MCP debug

* Allow Unity config dir writable for MCP heartbeat/logs

* Write Unity logs to file and list config dir in debug

* Use available Anthropic models for T pass

* Use latest claude sonnet/haiku models in workflow

* Fix YAML indentation for MCP preflight step

* Point MCP server to src/server.py and fix preflight

* another try

* Add MCP preflight workflow and update NL suite

* Fixes to improve CI testing

* Cleanup

* fixes

* diag

* fix yaml

* fix status dir

* Fix YAML / printing to stdout --> stderr

* find in file fixes.

* fixes to find_in_file and CI report format error

* Only run the stats on the CoPlay main repo, not forks.

* Coderabbit fixes.

Author: dsarno

.claude/prompts/nl-unity-suite-nl.md

@@ -103,25 +103,27 @@ STRICT OP GUARDRAILS
 **Goal**: Demonstrate method replacement operations
 **Actions**: 
 - Replace `HasTarget()` method body: `public bool HasTarget() { return currentTarget != null; }`
-- Insert `PrintSeries()` method after `GetCurrentTarget()`: `public void PrintSeries() { Debug.Log("1,2,3"); }`
-- Verify both methods exist and are properly formatted
+- Validate.
+- Insert `PrintSeries()` method after a unique anchor method. Prefer `GetCurrentTarget()` if unique; otherwise use another unique method such as `ApplyBlend`. Insert: `public void PrintSeries() { Debug.Log("1,2,3"); }`
+- Validate that both methods exist and are properly formatted.
 - Delete `PrintSeries()` method (cleanup for next test)
 - **Expected final state**: `HasTarget()` modified, file structure intact, no temporary methods
 
 ### NL-2. Anchor Comment Insertion (Additive State B) 
 **Goal**: Demonstrate anchor-based insertions above methods
 **Actions**:
-- Use `find_in_file` to locate current position of `Update()` method
+- Use `find_in_file` with a tolerant anchor to locate the `Update()` method, e.g. `(?m)^\\s*(?:public|private|protected|internal)?\\s*void\\s+Update\\s*\\(\\s*\\)`
+- Expect exactly one match; if multiple, fail clearly rather than guessing.
 - Insert `// Build marker OK` comment line above `Update()` method
 - Verify comment exists and `Update()` still functions
 - **Expected final state**: State A + build marker comment above `Update()`
 
 ### NL-3. End-of-Class Content (Additive State C)
-**Goal**: Demonstrate end-of-class insertions with smart brace matching
+**Goal**: Demonstrate end-of-class insertions without ambiguous anchors
 **Actions**:
-- Match the final class-closing brace by scanning from EOF (e.g., last `^\s*}\s*$`)
-  or compute via `find_in_file` + ranges; insert immediately before it.
-- Insert three comment lines before final class brace:
+- Use `find_in_file` to locate brace-only lines (e.g., `(?m)^\\s*}\\s*$`). Select the **last** such line (preferably indentation 0 if multiples).
+- Compute an exact insertion point immediately before that last brace using `apply_text_edits` (do not use `anchor_insert` for this step).
+- Insert three comment lines before the final class brace:
   ```
   // Tail test A
   // Tail test B  
@@ -159,7 +161,7 @@ find_in_file(pattern: "public bool HasTarget\\(\\)")
 
 **Anchor-based insertions:**
 ```json  
-{"op": "anchor_insert", "anchor": "private void Update\\(\\)", "position": "before", "text": "// comment"}
+{"op": "anchor_insert", "anchor": "(?m)^\\s*(?:public|private|protected|internal)?\\s*void\\s+Update\\s*\\(\\s*\\)", "position": "before", "text": "// comment"}
 ```
 
 ---

.github/workflows/claude-mcp-preflight.yml

@@ -0,0 +1,55 @@
+name: Claude MCP Preflight (no Unity)
+
+on: [workflow_dispatch]
+
+permissions:
+  contents: read
+
+jobs:
+  mcp-preflight:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: astral-sh/setup-uv@v4
+        with:
+          python-version: "3.11"
+
+      - name: Install MCP server deps
+        run: |
+          set -eux
+          uv venv
+          echo "VIRTUAL_ENV=$GITHUB_WORKSPACE/.venv" >> "$GITHUB_ENV"
+          echo "$GITHUB_WORKSPACE/.venv/bin" >> "$GITHUB_PATH"
+          if [ -f Server/pyproject.toml ]; then
+            uv pip install -e Server
+          elif [ -f Server/requirements.txt ]; then
+            uv pip install -r Server/requirements.txt
+          else
+            echo "No MCP Python deps found" >&2
+            exit 1
+          fi
+
+      - name: Preflight MCP server (stdio)
+        env:
+          PYTHONUNBUFFERED: "1"
+          MCP_LOG_LEVEL: debug
+          UNITY_PROJECT_ROOT: ${{ github.workspace }}/TestProjects/UnityMCPTests
+          UNITY_MCP_STATUS_DIR: ${{ github.workspace }}/.unity-mcp-dummy
+          UNITY_MCP_HOST: 127.0.0.1
+        run: |
+          set -euxo pipefail
+          mkdir -p "$UNITY_MCP_STATUS_DIR"
+          # Create a dummy status file with an unreachable port; help should not require it
+          cat > "$UNITY_MCP_STATUS_DIR/unity-mcp-status-dummy.json" <<JSON
+          { "unity_port": 0, "reason": "dummy", "reloading": false, "project_path": "$UNITY_PROJECT_ROOT/Assets" }
+          JSON
+          uv run --active --directory Server mcp-for-unity --transport stdio --help \
+            > /tmp/mcp-preflight.log 2>&1 || { cat /tmp/mcp-preflight.log; exit 1; }
+          cat /tmp/mcp-preflight.log
+
+