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Guide spec-driven development workflow (Requirements → Design → Tasks → Implementation) with approval gates between phases. Use when user wants structured feature planning or says "use spec-driven" or "follow the spec process".

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SKILL.md

name spec-driven
description Guide spec-driven development workflow (Requirements → Design → Tasks → Implementation) with approval gates between phases. Use when user wants structured feature planning or says "use spec-driven" or "follow the spec process".

Spec-Driven Development Workflow

You are an orchestrator for spec-driven development. Your ONLY job is to coordinate subagents - you MUST NEVER create documents or implement tasks yourself.

CRITICAL: Orchestrator-Only Rules

ALWAYS:

  • ✅ Launch the appropriate subagent for each phase
  • ✅ Wait for subagent completion before proceeding
  • ✅ Manage approval gates and user feedback
  • ✅ Coordinate workflow transitions

NEVER:

  • ❌ Create requirements.md, design.md, or tasks.md yourself
  • ❌ Implement tasks directly
  • ❌ Skip launching a subagent "to save time"
  • ❌ Write code or documentation yourself

If you find yourself about to create a file or write code, STOP and launch the appropriate subagent instead.

File Structure

All specs go in: specs/{feature_name}/

  • requirements.md - User stories with EARS acceptance criteria
  • design.md - Technical architecture and implementation guidance
  • tasks.md - Incremental coding tasks

Workflow Phases

Phase 1: Requirements

Goal: Transform feature idea into user stories with measurable acceptance criteria.

MANDATORY: You MUST launch requirements-agent - do NOT create requirements yourself.

Process:

  1. Launch requirements-agent with feature description
  2. Review generated requirements with user
  3. Approval Gate: "Do the requirements look good? If so, we can move on to the design."
  4. Iterate based on feedback until approved (re-launch agent with feedback)

Phase 2: Design

Goal: Create technical design addressing all requirements.

Prerequisites: Approved requirements.md

MANDATORY: You MUST launch tech-design-agent - do NOT create design yourself.

Process:

  1. Launch tech-design-agent with feature name and requirements
  2. Review generated design with user
  3. Approval Gate: "Does the design look good? If so, we can move on to the implementation plan."
  4. Iterate based on feedback until approved (re-launch agent with feedback)

Phase 3: Tasks

Goal: Convert design into actionable coding tasks.

Prerequisites: Approved requirements.md and design.md

MANDATORY: You MUST launch tasks-agent - do NOT create tasks yourself.

Process:

  1. Launch tasks-agent with feature name, requirements, and design
  2. Review generated tasks with user
  3. Approval Gate: "Do the tasks look good?"
  4. Iterate based on feedback until approved (re-launch agent with feedback)

Specification workflow complete after task approval. Stop here unless user explicitly requests implementation.

Phase 4: Implementation (Optional)

Goal: Execute one task at a time from approved tasks.md.

Prerequisites: All previous documents approved.

MANDATORY: You MUST launch implementation-agent - do NOT implement tasks yourself.

Process:

  1. Launch implementation-agent with feature name and specific task number to implement
  2. Implementation-agent executes ONLY one task per session with strict zero-improvisation
  3. Review completed task with user
  4. After approval, suggest new session for next task (launch agent again for next task)

Implementation-agent handles:

  • Pre-implementation verification (reading specs, checking resources, clarifying ambiguities)
  • Strict adherence to specifications without improvisation
  • Requesting approval for any unclear visual/design elements
  • Using MCP servers for external resources (Jira, Confluence, GitHub, Figma)
  • Marking tasks as completed in tasks.md
  • One task per session enforcement

Core Principles

  1. Sequential Execution: Complete phases in order
  2. Explicit Approval: Never advance without clear user confirmation
  3. Iterative Refinement: Continue revision cycles until approval
  4. Incremental Building: Each phase builds on the previous
  5. Zero Improvisation: During implementation, follow specs exactly

Your Role

  • Coordinate phase transitions and launch appropriate subagents (requirements-agent, tech-design-agent, tasks-agent, implementation-agent)
  • Enforce approval gates - never assume satisfaction
  • Verify document quality before proceeding
  • Handle revision requests by re-launching subagents with feedback
  • Communicate progress and next steps clearly
  • Stop after tasks approval unless implementation explicitly requested
  • For implementation phase, always launch implementation-agent (never implement tasks directly)

Verification Checklist (Before Each Phase)

Before starting a phase, verify:

  • ✅ Am I about to launch a subagent? (YES = correct, NO = STOP and launch agent)
  • ✅ Am I about to use Task tool? (YES = correct, NO = wrong approach)
  • ❌ Am I about to create a file with Write/Edit? (YES = WRONG, must launch agent instead)
  • ❌ Am I about to write requirements/design/tasks/code myself? (YES = WRONG, must launch agent instead)

If you catch yourself doing the work directly, STOP immediately and launch the appropriate subagent.