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v2.21.9

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@github-actions github-actions released this 09 Apr 12:21
v2.21.9
fb0ff9f

First-Class MCP Support for Pi Coding Agent

Added — pi-lean-ctx v2.0.0 with Embedded MCP Bridge

  • Embedded MCP client — pi-lean-ctx now spawns the lean-ctx binary as an MCP server (JSON-RPC over stdio) and registers all 20+ advanced tools (ctx_session, ctx_knowledge, ctx_semantic_search, ctx_overview, ctx_compress, ctx_metrics, ctx_agent, ctx_graph, ctx_discover, ctx_context, ctx_preload, ctx_delta, ctx_edit, ctx_dedup, ctx_fill, ctx_intent, ctx_response, ctx_wrapped, ctx_benchmark, ctx_analyze, ctx_cache, ctx_execute) as native Pi tools.
  • Automatic pi-mcp-adapter compatibility — If lean-ctx is already configured in ~/.pi/agent/mcp.json (via pi-mcp-adapter), the embedded bridge is skipped to avoid duplicate tool registration.
  • Dynamic tool discovery — Tool schemas come directly from the MCP server at runtime, not hardcoded. The disabled_tools config is respected.
  • Auto-reconnect — If the MCP server process crashes, the bridge reconnects automatically (3 attempts with exponential backoff). CLI-based tools (bash, read, grep, find, ls) continue working regardless.
  • /lean-ctx command enhanced — Now shows binary path, MCP bridge status (embedded vs. adapter), and list of registered MCP tools.

Added — Pi auto-detection in lean-ctx setup

  • Pi Coding Agent is now auto-detected alongside Cursor, Claude Code, VS Code, Zed, and all other supported editors. Running lean-ctx setup writes ~/.pi/agent/mcp.json automatically.
  • lean-ctx init --agent pi now also writes the MCP server config to ~/.pi/agent/mcp.json with lifecycle: lazy and directTools: true.

Improved — Pi diagnostics

  • lean-ctx doctor now shows three Pi states: "pi-lean-ctx + MCP configured", "pi-lean-ctx installed (embedded bridge active)", or "not installed".

Documentation

  • README for pi-lean-ctx completely rewritten with MCP tools table, pi-mcp-adapter compatibility guide, and disabled_tools configuration.
  • PI_AGENTS.md template updated with MCP tools section.

Upgrade

cargo install lean-ctx          # or
npm update -g lean-ctx-bin      # or
brew upgrade lean-ctx

Full Changelog: v2.21.9...v2.21.9

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