# Product Brain

> Governed knowledge graph for AI-assisted product work.

## What is Product Brain?

Product Brain is a governed knowledge graph for AI-assisted product work. It gives agents in Cursor, Claude Code, Codex, and any MCP-compatible tool a shared source of truth for product decisions, standards, tensions, insights, and work packages.

The core data structure is the Chain: a typed, versioned graph where every product decision, business rule, architectural choice, open tension, and work package lives as a structured entry with human-readable IDs (like WP-109 or DEC-301) and typed relations.

## Who is it for?

- Solo founders building with AI agents who are tired of re-explaining their product every morning
- Staff Engineers and CTOs of product-led teams (5–50 people) who need governance without bureaucracy
- AI-native builders who spend 10+ hours a week building with Cursor, Claude Code, or similar tools

## The Product Brain Method

A seven-phase workflow where each phase uses the right AI model tier:

1. **Orient** — Get grounded in the current state of the project
2. **Triage** — Classify incoming work and route to the right phase
3. **Shape** — Design a work package with structured facilitation and review lenses
4. **Phase** — Decompose into implementation slices with conversation primers
5. **Build** — Implement one slice per conversation with orchestrated agents
6. **Review** — Six-round verification across three lenses
7. **Ship/Retro** — Deploy, capture friction, and improve the next session's orientation

## How it works

- **The Chain** — A typed knowledge graph that agents query via MCP before they build and write to as they work
- **Living Skills** — Dynamic agent workflows that compound as you learn, replacing static .cursorrules or CLAUDE.md files
- **CLI First** — Works in any terminal, integrates with Cursor and Claude Code via MCP

## Pricing

- **Builders (Free)** — 1 workspace, unlimited entries, MCP + CLI access, community support
- **Teams (from $99/mo)** — Unlimited workspaces, governance flows, priority support
- **Enterprise (custom)** — SSO/SAML, dedicated MCP, finance exports, SLA

Usage-based: metered on MCP/API calls, captures, and guidance operations — not seats.

## Getting started

```
npx @productbrain/mcp@beta setup
```

Setup takes ~2 minutes. Full guide: https://github.com/synergyai-os/Product-OS/blob/main/docs/community/product-brain-setup-guide.md

## Links

- Website: https://productbrain.io/
- Community page: https://productbrain.io/community
- Community forum: https://community.productbrain.io
- Docs index: https://productbrain.io/docs/llms.txt
- Docs markdown: append `.md` to any `/docs/...` URL, or send `Accept: text/markdown`
- Blog RSS: https://productbrain.io/blog/feed.xml
- Docs MCP card: https://productbrain.io/.well-known/mcp/server-card.json
- Docs MCP endpoint: https://productbrain.io/docs/mcp (Mintlify-hosted)
- Product MCP (Chain read/write, OAuth): https://mcp.productbrain.io/mcp
- Agent skill: https://productbrain.io/.well-known/agent-skills/productbrain/skill.md
- Method: https://productbrain.io/method
- Pricing: https://productbrain.io/pricing
- FAQ: https://productbrain.io/docs/faq