---

name: te-doctor description: Use this skill when users say "tool executor not working", "diagnose tool executor", "check MCP health", "run tool executor tests", "debug search_tools", "execute_code failing", or need to troubleshoot issues with the Tool Executor.

Tool Executor Diagnostics

Diagnose and fix issues with the Claudikins Tool Executor.

Quick Health Check

Run the test suite to verify everything works:

cd ${CLAUDE_PLUGIN_ROOT}
npm test

Expected output: 43 tests passing across 4 test files.

Diagnostic Checklist

1. Build Status

Check the build is current:

cd ${CLAUDE_PLUGIN_ROOT}
npm run build

If build fails:

• Check tsconfig.json for TypeScript errors
• Run npm install to ensure dependencies are installed
• Check Node.js version (requires 18+)

2. MCP Server Connectivity

Test that MCP servers can connect. In execute_code:

// Check which clients are available
console.log("Available:", Object.keys({ serena, gemini, context7 }));

// Test a simple call
try {
  const result = await serena.get_active_project({});
  console.log("Serena OK:", result ? "connected" : "no project");
} catch (e) {
  console.log("Serena error:", e.message);
}

Common connectivity issues:

• uvx not installed: Install with pip install uvx or pipx install uvx
• npx timeout: Network issues or npm registry problems
• API key missing: Check environment variables are set

3. Registry Integrity

Verify YAML files are valid:

cd ${CLAUDE_PLUGIN_ROOT}
# Count tool definitions
find registry -name "*.yaml" | wc -l
# Should be ~102 files

# Check for syntax errors
npm run extract 2>&1 | grep -i error

If registry is corrupted:

rm -rf registry/
npm run extract

4. Workspace State

Check workspace directory:

cd ${CLAUDE_PLUGIN_ROOT}
ls -la workspace/
du -sh workspace/  # Check disk usage

Clean up old MCP results:

// In execute_code:
const deleted = await workspace.cleanupMcpResults(3600000); // 1 hour
console.log("Cleaned up", deleted, "old result files");

5. Serena Health (Critical)

Both Serena instances must be working:

Registry Serena (powers search_tools):

# Test semantic search
search_tools({ query: "diagram", limit: 3 })
# Should return gemini or shadcn tools

Sandbox Serena (available in execute_code):

const symbols = await serena.find_symbol({ name_path: "workspace" });
console.log("Found symbols:", symbols.content?.length || 0);

If Serena fails:

• Check uvx is installed: which uvx
• Check Python 3.10+: python3 --version
• Try manual start: uvx --from git+https://github.com/oraios/serena serena start-mcp-server

Common Issues

Issue: "search_tools returns no results"

Causes:

1. Registry YAML files missing or corrupted
2. Serena not indexing registry directory
3. Query terms don't match any tool descriptions

Fix:

npm run extract   # Regenerate registry
npm run build     # Rebuild
# Restart Claude Code

Issue: "execute_code times out"

Causes:

1. MCP server slow to connect (first use)
2. Long-running operation exceeds timeout
3. Infinite loop in code

Fix:

• Increase timeout: execute_code({ code: "...", timeout: 60000 })
• Split into smaller operations
• Check for infinite loops

Issue: "MCP client returns null"

Causes:

1. Server failed to start
2. Environment variable missing
3. Package not found (npx/uvx issue)

Fix:

# Check environment variables
echo $GEMINI_API_KEY
echo $APIFY_TOKEN

# Test server manually
npx -y @rlabs-inc/gemini-mcp

Issue: "Path traversal blocked"

Cause: Attempting to access files outside workspace.

Fix: All workspace paths must be relative and within ./workspace/:

// Wrong
await workspace.read("/etc/passwd");
await workspace.read("../package.json");

// Right
await workspace.read("data/file.txt");

Issue: "Console output truncated"

Cause: Output exceeds 500 character limit.

Fix: Keep logs concise or save verbose output to workspace:

// Instead of:
console.log(JSON.stringify(largeData, null, 2));

// Do:
await workspace.writeJSON("output.json", largeData);
console.log("Saved to output.json");

Log Locations

MCP Server Stderr:

# Claude Code captures MCP stderr
# Check Claude Code's debug output
claude --debug

Audit Log:

// In execute_code, MCP calls are logged
// Access via getAuditLog() in clients.ts (internal only)

Test Suite Details

Test File	Tests	Coverage
tests/unit/workspace.test.ts	13	Path traversal, read/write, JSON, directories
tests/unit/clients.test.ts	6	Server configs, client management
tests/unit/search.test.ts	10	Tool loading, search, pagination
tests/integration/execute-code.test.ts	14	Execution, workspace access, MCP proxies

Run specific test file:

npm test -- tests/unit/workspace.test.ts

Run with verbose output:

npm test -- --verbose

Nuclear Option: Full Reset

If nothing else works:

cd ${CLAUDE_PLUGIN_ROOT}

# Clean everything
rm -rf node_modules dist registry workspace/mcp-results

# Reinstall and rebuild
npm install
npm run extract
npm run build

# Restart Claude Code

Source Code Reference

• ${CLAUDE_PLUGIN_ROOT}/tests/ - All test files
• ${CLAUDE_PLUGIN_ROOT}/src/sandbox/clients.ts - Client lifecycle
• ${CLAUDE_PLUGIN_ROOT}/src/search.ts - Search implementation
• ${CLAUDE_PLUGIN_ROOT}/src/sandbox/runtime.ts - Execution engine