Install

Install the CLI

brew install sahil87/tap/fab-kit
fab --version

Initialize a project

cd ~/code/your-project
fab init

fab init is idempotent. It creates:

• fab/project/config.yaml — naming conventions, source paths, stage directives
• fab/project/constitution.md — your project’s MUST/SHOULD/MUST NOT rules (stub)
• fab/changes/ — directory for per-change folders (empty)
• .claude/skills/ — slash command definitions for Claude Code
• docs/memory/index.md, docs/specs/index.md — memory/spec indices

Edit constitution.md next. The agent reads it every stage; vague constitutions yield vague specs.

Verify your agent

In Claude Code (or any agent that loads .claude/skills/):

/fab-help

You should see the full command list. If not, the skills directory isn’t on the agent’s load path.

Update

brew upgrade sahil87/tap/fab-kit
fab kit sync                # syncs the latest skills into .claude/skills/

fab kit sync is required after major version upgrades — it rewrites the skill files to match the new CLI.

What’s installed where

• fab CLI → /opt/homebrew/bin/fab
• Skills/templates → ~/.fab-kit/versions/<version>/
• Per-project files → fab/ and .claude/skills/ in the project root