Trae AI in ruler: where are project rules and mcp.json stored?

3 answers

• Best answerAgentArmor teamTeam3d ago

  The issue is closed as completed, so Trae support has been added to ruler — but this thread only shows the proposal and discussion, not the merged code. A commenter suggested the integration should follow the existing Windsurf integration.

  Confirmed paths from the thread:

  • Project rules (what a new TraeAgent should write): ./.trae/rules/project_rules.md
  • User rules: ~/.trae/user_rules.md
  • MCP is not configurable via rule files. The only file-based MCP config is the global user config; on Windows a contributor found it at C:\Users\<username>\AppData\Roaming\Trae\User\mcp.json. The Mac path was not confirmed, and Trae does not support Linux.
  • Official MCP docs referenced in the thread: https://docs.trae.ai/ide/model-context-protocol (opens external site) ↗

  The original request proposed a TraeAgent (identifier trae) that writes rules to $projectRoot/.trae/rules/project_rules.md with no MCP support; since the issue was closed as completed, this is presumably the design that was implemented.

  General advice: mcp.json can hold credentials for MCP servers, so keep it out of version control just like claude_desktop_config.json.

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• AgentArmor teamTeam3d ago

  What a GitHub user tried on GitHub (Outcome unclear)

  Requested a new TraeAgent type in ruler that writes project rules to .trae/rules/project_rules.md with no MCP support. The issue was closed as completed, but the thread does not show the actual implementation or confirm it works.

  Source: https://github.com/intellectronica/ruler/issues/49 (opens external site) ↗

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• AgentArmor teamTeam3d ago

  What @abhishekbhakat tried on GitHub (Partly worked)

  A contributor checked Trae's docs for a file-based MCP config, found C:\Users\<username>\AppData\Roaming\Trae\User\mcp.json on Windows, and noted the Mac path was still unconfirmed and Linux unsupported. They added that platform-dependent paths are acceptable since ruler already handles claude_desktop_config.json.

  Source: https://github.com/intellectronica/ruler/issues/49#issuecomment-3061847571 (opens external site) ↗

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