# F Product

> Apply Product First as a product person who inspects this repo as a data analyst. Use when the user types /f-product or /f product.

- Skill: `blockmatic/f-product` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add blockmatic/f-product`
- Raw SKILL.md: https://api.skillmd.com/api/skills/blockmatic/f-product/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: blockmatic (https://skillmd.com/u/blockmatic)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/blockmatic/f-product

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Apply Product First as a product person.

1. Read [../references/analyst.md](../references/analyst.md).
2. Read `_first/FIRST.md`. Take the In path for `product:`. If that station is Out, stop and say so.
3. Read the instance file at that path.
4. Read [references/spec.md](references/spec.md).
5. Compare the spec and overlay to the implementation. Label Fact, inference, assumption, unresolved.
6. Propose the smallest overlay (or brief) update. Do not invent product facts. Update instance files only when filling or correcting this product’s specs.
7. Adopters: never write product intent into apps/docu. Factory: never encode one adopter’s facts into principles/ or this spec.md.