Rust FAF MCP server

<!-- faf: rust-faf-mcp | Rust | mcp-server | RMCP — the Rust-native MCP server for FAF (Foundational AI-context Format). Single binary, stdio transport, 4.3 MB stripped. cargo install rust-faf-mcp. Built on the rmcp Rust MCP SDK + faf-rust-sdk. --> <!-- mcp-name: one.faf/rust-faf-mcp -->

rust-faf-mcp

Persistent Project Context for Rust MCP clients. Native. Fast. cargo install

The Lineage Edition (v0.8.1) — one.faf/rust-faf-mcp · rmcp 3.0.1 (MCP Tier 1 foundation) · faf-rust-sdk 3.1 (the same always-33 kernel faf-wasm-sdk uses) · solid cargo-native Rust MCP for Rust devs

v0.8.1 — Security patch: rustls 0.23.45 closes RUSTSEC-2026-0285. See CHANGELOG.

FAF defines. MD instructs. AI codes.

Stop re-explaining your project to every AI session. One .faf file holds your persistent project context. Every AI reads it once and knows what you're building.

Rust-native MCP (Model Context Protocol) server for FAF — structured AI project context in YAML (application/vnd.faf+yaml). Single binary, stdio transport, 4.3 MB stripped. Built on rmcp and faf-rust-sdk.

Quickstart

# Rust toolchain (install):
cargo install rust-faf-mcp --version 0.8.1

# No Rust (try — downloads GH Release binary for darwin/linux):
npx --yes rust-faf-mcp@0.8.1

Point an MCP client at the pin. A bare rust-faf-mcp on PATH may be an old Homebrew binary.

# Claude Code
claude mcp add faf -- npx --yes rust-faf-mcp@0.8.1

// WARP / Cursor / Zed / Claude Desktop — any stdio MCP client
{
  "mcpServers": {
    "faf": {
      "command": "npx",
      "args": ["--yes", "rust-faf-mcp@0.8.1"]
    }
  }
}

After cargo install rust-faf-mcp --version 0.8.1, "command": "rust-faf-mcp" is the install. Until you have proven that binary, use the npx pin.

No flags, no config files, no network listener. Pure stdio JSON-RPC.

Or via Homebrew (macOS, pre-built). If you already have it, upgrade — an old keg can sit on PATH as rust-faf-mcp:

brew update
brew install Wolfe-Jam/faf/rust-faf-mcp
# already installed:
brew upgrade Wolfe-Jam/faf/rust-faf-mcp

One command, done forever

fafauto runs setup if project.faf is missing (tree detection writes mechanical facts), then syncs CLAUDE.md. It does not rewrite an existing file. Confirm setup (sweeps)** lists what setup occupied — walk it; not a second write-gate. Empty human slots stay empty until you state them.

faf_auto complete
━━━━━━━━━━━━━━━━━
Score: 0% → 42% (+42) ● GREEN
Steps:
  1. Setup — created project.faf
  2. Created CLAUDE.md

Path: /home/user/my-project

Confirm setup (sweeps)
Walk these. Detection is already a fact. Not a second write-gate.
  project.name           my-api
  project.main_language  Rust
  stack.backend          Rust

What it produces:

Shortened. The full README is on GitHub.