Individual skill

write-product-spec

Use when a user asks for a product spec with invariants, a tech spec, or a PRD. Modes: product (default), technical, requirements. Not for task breakdown: use plan.

.devin/skills/write-product-spec/SKILL.md

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License: Apache-2.0

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# Write product spec

## Contract

| Field | Bound contract |
|---|---|
| Trigger | User asks for a product spec with numbered behavioral invariants, a technical implementation plan, or an evidence-backed PRD. |
| Authority | Human-gated: in requirements mode, previews and confirms credentials, paid actions, and remote publishing before execution; otherwise writes only the named artifact. Rollback is delete the file. No remote mutation without explicit human approval in requirements mode. |
| Side effect | Writes one PRODUCT.md, TECH.md, or PRD artifact; in requirements mode also stages, commits, and opens a PR after explicit confirmation. |
| Done | The named artifact exists, meets its mode-specific contract, and the output is confirmed. |

## Inputs

- Mode (required): `product` (default), `technical`, or `requirements`.