The language of product truth

The ideas Stewie is built on, defined plainly. Each page is the canonical reference for a term — what it means, why it exists, and how it fits together.

• Product Behavior Contract (PBC)

  A Markdown-first, evidence-grounded spec of what a software product promises to do — readable by every role, auditable by anyone.

  Read the definition →

• Agent Context Crystallization

  The practice of turning volatile AI coding-agent session context into durable, inspectable artifacts — checkpoints and crystals — before compaction destroys the why.

  Read the definition →