# Stewie > Stewie is a Product Intelligence Workspace for SaaS teams and technical founders. It reads your codebase and helps you author a living product behavior spec — grounded in real code, not guesswork. ## What Stewie does Stewie analyzes your GitHub repository (read-only) and extracts candidate product behaviors, modules, and invariants — each with a confidence score and file-level evidence. You confirm what's true, reject what's wrong, and defer what's unclear. The result is a set of `.pbc.md` files: a living product behavior spec versioned in your own repo. ## Core capabilities - **Product analysis** — reads your repo and maps candidate behaviors with evidence - **PBC authoring** — markdown-first product behavior contracts with Given/When/Then structure - **Candidate confirmation flow** — confirm, reject, or defer each extracted claim - **Evidence provenance** — every behavior links to the files that support it - **Living spec output** — `.pbc.md` files versioned in git, readable by your whole team ## What Stewie is NOT - Not a documentation tool (specs are grounded in code, not written from intent) - Not a test runner (PBCs describe behavior, not test cases) - Not an AI chat tool (analysis is triggered manually, not autonomous) - Not a project management tool (no tickets, roadmaps, or task tracking) ## Pricing - **Free** — $0 forever. 1 product, up to 3 modules, 1 product analysis, unlimited PBCs - **Founder Early Access** — $15/month flat. Unlimited products and modules, 5 product analyses/month, Git integration, Standard Library modules ## Open foundation The `.pbc.md` format is a public, vendor-neutral spec. Your behavior contracts are plain markdown — version-controlled, portable, readable without Stewie. The spec ships with reference CLI tooling and a browser viewer that renders structured PBC blocks as rich UI. - PBC spec, CLI, and reference viewer (live): https://github.com/stewie-sh/pbc-spec ## Trust and security - Read-only GitHub access — Stewie never writes to your repo - No model training on your code — contractual commitment - Manual analysis only — no background scanning - Derived artifacts only — structure maps and summaries, not repo copies ## Full version - More details: https://www.stewie.sh/llms-full.txt ## Get early access - Request access: https://tally.so/r/0QPkry - Contact: hello@stewie.sh - Blog: https://www.stewie.sh/blog - Changelog: https://www.stewie.sh/changelog