TL;DR: v5.0 added tool annotations to all 32 MCP tools, privacy policy, and Desktop Extensions manifest. v5.1 adds tool #33 — faf_tri_sync — Nelly🐘 makes your AI remember across sessions. Answer 3 questions (the 3Ws) and your AI stops guessing.
Why v5
FAF has been in the MCP ecosystem since PR #2759. But installing it still meant opening a terminal and editing claude_desktop_config.json. That's fine for developers. Not fine for everyone else.
Desktop Extensions change that. One click in Claude Desktop → Settings → Extensions. Done.
Anthropic requires specific things for approval. v5 delivers all of them.
What's New
Tool Annotations (All 32 Tools → 33 in v5.1)
Every tool now declares what it does — read-only, write, or destructive — so Claude Desktop can show users what's happening before it happens.
// Read-only: 16 tools
{ readOnlyHint: true, openWorldHint: false }
// Write/modify: 15 tools
{ readOnlyHint: false, destructiveHint: false }
// Destructive: 1 tool (faf_clear)
{ readOnlyHint: false, destructiveHint: true }This is the #1 reason Desktop Extensions get rejected. Not us.
Privacy Policy
FAF processes everything locally. No data leaves your machine. No analytics, no telemetry, no tracking, no accounts. Now it's written down in PRIVACY.md — the #2 rejection reason, handled.
Desktop Extensions Manifest
Clean manifest.json (v0.3) with all 33 tools listed, privacy policy linked, 512px icon. Validated with mcpb validate, packed at 63KB.
Non-Developer Section
New README section for people who've never opened a terminal:
3 Steps
1. Install from Claude Desktop → Settings → Extensions
2. Tell Claude about your project
3. Claude creates your project DNA
v5.1 — Nelly Edition 🐘🧡
Same day, one more tool. Meet Nelly.
The 3Ws — Start Here
Answer 3 questions. That's all your AI needs.
Who is it for? Not you — them.
What do they get? Not features — the outcome.
What's broken today? Why must this exist?
Tell Claude your 3Ws and FAF turns them into project DNA that never drifts. Build yours →
Tool #33: faf_tri_sync (Pro)
bi-sync keeps .faf and CLAUDE.md aligned — free forever. tri-sync adds RAM: your AI remembers across sessions via MEMORY.md.
bi-sync = ROM (.faf) ↔ CLAUDE.md ← free forever
tri-sync = ROM ↔ CLAUDE.md ↔ RAM (MEMORY.md) ← Pro14-day free trial, no signup. Then a dime a day ($3/mo) or a nickel a day ($19/yr). $29/yr Global covers both CLI + MCP.
🐘 Feed Nelly — She Never Forgets
Nelly is the tri-sync mascot. She remembers what your AI forgets between sessions. Feed her a dime a day and she'll never let your context drift.
Try It
npx claude-faf-mcp@5.1.0 Or tell Claude:
Score my project's AI-readiness and tell me how to improve. The Numbers
- v5.0 + v5.1 — Released March 4, 2026
- 351/351 — Tests passing
- 33/33 — Tools annotated
- 100% — Trophy score
- 33,000+ — npm downloads (ecosystem)