A structured 6-phase development sprint: Think → Plan → Build → Review → Test → Ship. Role-based subagents at each phase. Inspired by Garry Tan's gstack.
Works with any Agent Skills compatible tool: Claude Code, OpenAI Codex, Trae, Cursor, Gemini CLI, and more.
gstack is Garry Tan's (CEO of Y Combinator) open-source software factory for Claude Code — 15 specialist roles and 6 power tools that turn Claude Code into a virtual engineering team.
This skill takes gstack's core insight — structured roles beat generic prompting — and packages it as a portable Agent Skill that works across 20+ AI coding tools, not just Claude Code.
What we kept from gstack:
- The Think → Plan → Build → Review → Test → Ship workflow
- Role-based subagent spawning (YC Coach, Eng Manager, Staff Engineer, QA Lead, Release Engineer)
- Design doc as the central artifact that flows between phases
- Paranoid review culture
What we changed:
- Simplified from 15 skills to 6 phases (most people don't need all 15)
- Made it tool-agnostic via Agent Skills standard
- Focused on solo dev / small team use case
- Added model selection guidance per phase
| # | Phase | Role | Spawns | Output |
|---|---|---|---|---|
| 1 | Think | YC Office Hours Coach | Sonnet | DESIGN.md |
| 2 | Plan | Eng Manager | Sonnet | PLAN.md |
| 3 | Build | Implementer | Haiku/Sonnet | Code + Tests |
| 4 | Review | Staff Engineer | Sonnet | Review Report |
| 5 | Test | QA Lead | Sonnet | Bug Report + Fixes |
| 6 | Ship | Release Engineer | Haiku | PR / Deploy |
npm install -g @jahonn/agentskills-cli
agentskills install ./dev-workflow-skill -t allclawhub install gstack-workflowCopy the skill directory to your tool's skill folder:
# Claude Code
cp -r dev-workflow-skill ~/.claude/skills/dev-workflow
# Codex
cp -r dev-workflow-skill ~/.codex/skills/dev-workflow"Build me a [feature]" → runs all 6 phases
"Run dev-workflow on [description]"
"Just review and ship this branch" → Review → Ship
"I have DESIGN.md, skip to Plan"
"/think [idea]"
"/review"
"/ship"
Each phase spawns a focused subagent with a specialized prompt. The subagent works in isolation, produces a structured artifact, and passes it to the next phase.
User idea → DESIGN.md → PLAN.md → Code → Review → Tests → PR
(Think) (Plan) (Build) (Review) (Test) (Ship)
Key principle: no code until the plan is approved. Challenge scope ruthlessly.
- YC Office Hours — reframing problems before solving them
- Amazon Working Backwards — press release before PRD
- INVEST — user story quality criteria
- RICE — feature prioritization
Built on the ideas from gstack by Garry Tan. gstack is MIT licensed. This skill is an independent implementation inspired by gstack's philosophy, not a fork.
- gstack — the original (15 skills for Claude Code)
- PM Agent Skill — product management workflow
- Agent Skills Spec — the open standard
MIT