# Spec Driven Development

> Use when planning or implementing any non-trivial TicketPilot change. Requires proposal, design, tasks, acceptance criteria, and validation before implementation.

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

---


# Spec-driven Development

Rules:
1. Do not implement non-trivial features without a spec/change.
2. Every change must include objective, scope, non-goals, affected modules, acceptance criteria, and test plan.
3. Implementation must follow tasks.md.
4. Completed tasks must be checked off.
5. After implementation, run the quality gate.