feat(agent): add internal MCP server for self-modification#1969
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feat(agent): add internal MCP server for self-modification#1969
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Local HTTP MCP server, started with the main process and torn down on quit, that exposes four self-modification tools to the running agent: read/write the user's custom instructions and list/add MCP server installations on the active project. Mirrors McpProxyService: binds 127.0.0.1:0, generates a per-boot random bearer token, registers @preDestroy cleanup. AgentAuthAdapter appends one extra entry to the agent's MCP server list. A tRPC subscription keeps the renderer settings store in sync when the agent rewrites custom instructions in the encrypted renderer-storage bucket. Generated-By: PostHog Code Task-Id: 934a7fa1-fbb6-4f1d-89d3-f6abc69b7e23
Installing an MCP server via add_mcp_server now triggers a session refresh so the new tools become available without restarting the agent. - Emit McpServerInstalled after successful install (api_key + OAuth) - For OAuth, poll the backend until pending_oauth flips, then emit - AgentService listens and calls _posthog/refresh_session per session - Defer the refresh when a turn is in flight; fire it after turn ends - Drop the local api_key requirement check (backend enforces it; this unblocks no-auth servers that need a dummy key value)
The setup.ts default `/mock/userData` works locally as root but EACCES in GitHub runners. Mocking the store at the test level keeps the fix scoped — the polling tests never need real store state. Generated-By: PostHog Code Task-Id: 934a7fa1-fbb6-4f1d-89d3-f6abc69b7e23
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Problem
Code can't do anything to itself. I find that annoying. We need to let it modify itself.
Changes
Local HTTP MCP server, started with the main process and torn down on quit, that exposes four self-modification tools to the running agent: read/write the user's custom instructions and list/add MCP server installations on the active project.
Mirrors McpProxyService: binds 127.0.0.1:0, generates a per-boot random bearer token, registers @preDestroy cleanup. AgentAuthAdapter appends one extra entry to the agent's MCP server list. A tRPC subscription keeps the renderer settings store in sync when the agent rewrites custom instructions in the encrypted renderer-storage bucket.
Generated-By: PostHog Code
Task-Id: 934a7fa1-fbb6-4f1d-89d3-f6abc69b7e23
How did you test this?
ran it locally to install the Linear MCP server (OAuth flow) and the NYC subway for the API key route.
Publish to changelog?