YOUR PERSONAL AI WORKBENCH
Build with any AI. Keep everything. Own it.
fAI is a portable workbench that sits under the AI coding tools you already use: Claude Code, Cursor, Codex, whatever's next. It captures how you work and compounds it into context every tool can draw from, session after session, in plain files you own.
deno run -A "https://www.fathym.com/fai/install.deno"Free · open source · runs locally.
AI gives you intelligence. fAI gives you intellect.
one vault, under every tool, compounding session over session
WHAT fAI ACTUALLY IS
One workbench under every tool.
Like GitHub, but for your AI context: portable, versioned, and yours.
Not a coding agent. Not a model router. Not a memory plugin. A workbench.
Your context, captured
Decisions, patterns, vocabulary: captured as you work, without changing how you work.
Smarter every session
What you learn in one session shows up in the next. Every tool draws from the same vault.
Plain files, git-backed
Readable markdown in ~/.fai/. No opaque database. Uninstall fAI and your context stays.
HOW IT WORKS
Four steps. Fully automatic.
Four steps building two things, running quietly under whatever tool you are in: a record of your work that only grows, and a synthesis of it that's rewritten to keep every tool briefed. No config, no ritual.
The record · only grows
Capture
What you discussed, decided, and discovered, as you work.
Seal
Captures seal into your vault on a cadence, each one kept as its own commit.
The synthesis · rewritten in place
Synthesize
The record gets boiled down to what matters, using the model you pick.
Inject
Open a fresh terminal or switch tools, and you start already briefed.
WHAT CHANGES
Session 50 knows your patterns. Session 1 started from scratch.
Without fAI
- ✗Re-explain the project, every session
- ✗Context trapped per tool: Claude's stays in Claude, Cursor's in Cursor
- ✗Switch tools, start over
- ✗Your best thinking evaporates on close
With fAI
- ✓Every tool starts already briefed
- ✓One vault feeds all 16 agents
- ✓Switch tools without starting over
- ✓Your judgment compounds, session over session
YOUR VAULT
Three files your AI reads, rebuilt from the record.
FAI-SESSION.mdWhat's happening now
Decisions made, approaches tried, threads still open: the living briefing your next session picks up.
FAI-PROJECT.mdWhat you're building
Architecture, patterns, vocabulary, stack choices: the full picture of the project, without the re-brief.
FAI-PERSONAL.mdHow you work
Your preferences, corrections, and style, carried across every project and every tool.
These three are the synthesis: readable markdown in ~/.fai/, rewritten as you work, with your petnames beside them. Underneath sits the record they come from, versioned in git. History, not snapshots.
WORKS WITH EVERYTHING
One vault. Every tool you use.
$ fai → fAI's own block in each agent's file, pointing at your context. The rest stays yours.
YOUR CHOICE OF MODEL
Local or frontier. Your vault doesn't care.
Local models
- ·$0 per month
- ·Never leaves your machine
- ·Fast for captures
Frontier models
- ·Stronger synthesis
- ·Complex reasoning
- ·Heavier distillation
Switch freely. Context persists either way.
OWNERSHIP
Uninstall fAI. Keep everything.
Your context lives in plain files you own: readable, portable, git-versioned. Git democratized code ownership; fAI does the same for your AI's context. Remove fAI whenever you like: the folder stays, the record and the synthesis both.
GET STARTED
Install in seconds. Then just work.
deno run -A "https://www.fathym.com/fai/install.deno"$ fai
Free. Open source. Runs locally. Git files on your machine.
Your AI finally knows you. Every tool. Every session.
PERSONAL AI WORKBENCH
YOU^AI