MCP Tools Bypass TDD Guard

[blukraken]

TDD Guard successfully blocks Write, Edit, MultiEdit, TodoWrite but fails to stop MCP tools even when configured in hooks. I am absolutely loving the tool, but would also love to see if this could be fixed somehow. Using the Filesystem MCP has been night and day for efficiency for me, but to give those up would be a bummer.

MCP filesystem tools (mcp__filesystem__write_file, mcp__filesystem__edit_file) completely bypass TDD Guard enforcement, allowing implementation code to be written without failing tests first, violating core TDD principles.

I had CC test creating the writing the exact same code into a file and editing it the same way for each test. This significantly impacts TDD Guard's effectiveness in modern CC environments where MCP tools are used pretty often for file operations.

[nizos]

Hi @blukraken,

Thanks for flagging this! I'm glad that you're enjoying TDD Guard overall. :)

This is definitely something we need to fix. Can you share more details about your setup so I can reproduce it on my end?
I want to make sure that I have the same MCP tools.

[blukraken]

I'm running in an Oracle Cloud VM on Ubuntu 24 and using both Jest and Pytest.

"mcpServers": {
   "sequential-thinking": {
     "command": "npx",
     "args": [
       "-y",
       "@modelcontextprotocol/server-sequential-thinking"
     ],
     "env": {}
   },
   "context7": {
     "command": "npx",
     "args": [
       "-y",
       "@upstash/context7-mcp"
     ],
     "env": {}
   },
   "playwright": {
     "command": "npx",
     "args": [
       "-y",
       "@executeautomation/playwright-mcp-server"
     ]
   },
   "filesystem": {
     "command": "npx",
     "args": [
       "-y",
       "@modelcontextprotocol/server-filesystem"
     ],
     "env": {}
   },
   "ripgrep": {
     "command": "npx",
     "args": [
       "-y",
       "mcp-ripgrep@latest"
     ],
     "env": {}
   },
   "repomix": {
     "command": "npx",
     "args": [
       "-y",
       "repomix",
       "--mcp"
     ],
     "env": {}
   },
   "zen": {
     "type": "stdio",
     "command": "/mnt/data/mcp-servers/zen-mcp-server/.zen_venv/bin/python",
     "args": [
       "/mnt/data/mcp-servers/zen-mcp-server/server.py"
     ],
     "env": {}
   }
 },

[nizos]

@blukraken thank you for the additional details! I'll take a closer look during the weekend. I'd also happily accept a contribution if that's something you'd be interested in! :)