Show HN: I got tired of syncing Claude/Gemini/AGENTS.md and .cursorrules

2•wolfejam•1h ago

I use Claude, Codex, Cursor, and Gemini on different projects. Each one has its' own md file in its own format. CLAUDE.md, AGENTS.md, .cursorrules, GEMINI.md. Four files saying roughly the same thing, four chances to get out of sync!

  I kept forgetting to update one, then wondering why Cursor was hallucinating my project structure while Claude had it right.

  So I built an MCP server that reads a single YAML file (project.faf) and generates all
   four formats. 7 bundled parsers handle the differences between them. You edit one file, and bi-sync keeps everything current.

  It's an MCP server, so Claude Desktop can use it directly. 61 tools, 351 tests, no CLI dependency.

  Try it: npx claude-faf-mcp

  Source: https://github.com/Wolfe-Jam/claude-faf-mcp

  The .faf format itself is IANA-registered (application/vnd.faf+yaml).

  Curious if others are dealing with this multi-AI config problem, or if there's a simpler approach I'm not seeing.

Comments

verdverm•1h ago

use git with a repo, like so many do for their dotfiles

if your agent cannot be populated from there as well, you are using the wrong framework / setup

wolfejam•40m ago

Totally — git handles syncing files. The problem is these four files have different formats and conventions. Same project context, four dialects. That's why I wrote bi-sync --all: one YAML source, four native outputs.

verdverm•30m ago

that's not my experience, LLMs are flexible enough, ln -s is sufficient

wolfejam•15m ago

ln -s makes all four files identical. Whichever format you write it in, the other three get the wrong structure. This generates each in its native format.

verdverm•14m ago

show me good evals that it actually makes a difference

that is the opposite of what I see

wolfejam•6m ago

ETH Zurich tested this: LLM-generated prose context = -3% performance, +20% cost. Even human-written = +4% at +19% cost. The problem is prose bloat. Structured formats avoid that by design. https://arxiv.org/abs/2602.11988

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