Individual skill

spec-driven

Use when starting a project or feature, requirements are unclear, or a change crosses modules. Not for implementing from an existing spec: use spec-driven-implementation.

.devin/skills/spec-driven/SKILL.md

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License: Apache-2.0

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# Spec-driven development

## Contract

| Field | Bound contract |
|---|---|
| Trigger | A new project or feature is starting, requirements are unclear, the change touches multiple modules, or the task exceeds roughly 30 minutes. |
| Authority | Reversible local: writes only files and VCS scoped to the current working tree; rollback is version control. No remote mutation, credential exposure, or irreversible action. |
| Side effect | Writes and commits a spec, records human-approved plan and tasks, and implements through offensive-first TDD. All writes are local; no external service calls. |
| Done | A reviewed, approved spec covering six areas is saved to the repo and the implementation follows it. |

## Inputs

The user's request is mandatory. The requester must approve the spec before planning begins.