About FAF

The Context Standard for AI

What is .faf?

project.faf is a structured YAML file that lives in your repo. It tells any AI tool what your project is, how it's built, and who it's for. One file, every tool, every session.

Think of it as package.json for AI context. Your dependencies have a manifest — now your context does too.

Why it exists

Every AI session starts from zero. Your AI re-discovers your stack, your goals, your conventions — every time. That's 91% wasted context.

project.faf fixes that. Define once, AI remembers forever. Across sessions, models, tools, teams, and enterprises.

Credentials

IANA Registered — application/vnd.faf+yaml
Anthropic MCP #2759 — merged into official registry
47k+ downloads — npm, PyPI, crates.io
5 MCP servers — Claude, Grok, Gemini, Cursor, Rust
IETF standardization — in progress
Zenodo/CERN — academic publication

The ecosystem

faf-cli Universal CLI — npm

claude-faf-mcp Anthropic — npm

grok-faf-mcp xAI — npm

gemini-faf-mcp Google — PyPI

faf-mcp Universal — npm

faf-rust-sdk Rust — crates.io

The three layers

.faf defines. .md instructs. AI consumes.

The foundation layer (project.faf) holds structured facts. The instruction layer (CLAUDE.md, AGENTS.md, .cursorrules) holds prose guidance — generated from .faf. The AI reads both.

Origin

Created by Wolfe James. AI context R&D since 2024. FAF launched 2025 — now IANA-registered and shipping across 3 registries.

Contact: team@faf.one