# Plans

Living Plan F3 artifacts for Product Factory builds.

Plans are durable engineering artifacts consumed by humans, teams, and agents.

Required files per product:

```text
plans/<product_id>/plan.md
plans/<product_id>/plan.html
```

Rules:
- include frontmatter with `product_id`, `purpose`, and `references`
- include required sections: purpose, problem, solution, files, phases, validation, references, notes
- updates append `## Amendment <UTC timestamp>` blocks
- deploy remains guarded through `git-proxy:8099/deploy`