ProductSpec

Use when implementing, reviewing, planning, or changing work governed by a Product Spec. Treat `.product-spec.md` files as the product contract for the work.

Writes, validates, and converts ProductSpec files (.product-spec.md), the Markdown format for recording product intent before implementation. Use when authoring a new Product Spec, converting an existing PRD or feature doc into one, validating spec files locally or in CI, or recording how a spec's intent changed over time in a Decision Trace. For implementing code against a Product Spec that already exists, use the productspec skill instead.