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Pi adds MCP support through its code-first Codemode approach

lucumr.pocoo.org 16 min read Editor score 7/10

The author contrasts supplied tool definitions with composing calls through scripts and CLI, and says Pi 1.0 adds MCP support via Codemode. The design choices matter to engineers shaping agent tool interfaces and context use.

What: Pi adds MCP support through Codemode, a code-first way for an LLM to orchestrate complex operations on the harness side.
How: Codemode runs in the harness in QuickJS within a WASM runtime, with no network or file system and limited RAM; it can call tools.
Why it matters: Separating harness-side orchestration from the execution environment matters when tools and the harness run on different file systems and have different trust levels.

Codemode runs within the harness and calls tools on behalf of the LLM. Sketched from the article's own text.

Read on lucumr.pocoo.org → Hacker News · 20 comments Lobsters · 9 comments

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