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refactor(codemode,coding-agent): decouple MCP from codemode

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Tools that reach other tools declare it with reachesTools(input); MCP uses it to wait for the servers a call needs and to decide which codemode or tool_search tool to activate, instead of parsing codemode scripts and comparing parameter schemas. Namespaces get aliases, replacing codemode's MCP-specific __ suffix rule.

pi-codemode no longer knows MCP: MCP_TYPESCRIPT_PREAMBLE and mcpStructuredContentSchema() are removed, and the MCP result schema describes itself, with the server's local $refs relocated so they resolve as before.
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Armin Ronacher 2026-10-12 09:19:11 +02:00
parent 4270522473
commit 24382bedd0
20 changed files with 377 additions and 314 deletions
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packages/coding-agent/docs/mcp.md
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@ -265,7 +265,7 @@ Changes to enabled state or exposure apply only to the current session. A file-c
An installed extension that registers `/mcp`, such as `pi-mcp-adapter`, replaces the built-in MCP support for sessions. Pi then does not read `mcp.json` or connect its servers in a session, and `/mcp` belongs to the extension. Remove the extension to restore the built-in behavior. To disable built-in MCP support without a replacement, disable `mcp` under Built-in in `pi config`, or set `"extensions": ["-builtin:mcp"]` in [settings](settings.md#resources). `--no-mcp` disables it for one run.
An extension that registers `codemode` or `tool_search` similarly replaces the built-in tool with that name. Shell-level `pi mcp` commands always use the built-in implementation.
An extension that registers `codemode` or `tool_search` similarly replaces the built-in tool with that name. Pi activates the replacement for MCP servers and waits for the servers its calls need only when it declares [`reachesTools`](extensions.md#tool-exposure). Shell-level `pi mcp` commands always use the built-in implementation.
### Use MCP from the SDK