Spec Generator

Phase 0:   Specification Study (Read specs/ + templates/ - mandatory prerequisite)
           |
Phase 1:   Discovery               -> spec-config.json + discovery-context.json
           |                           (includes spec_type selection)
Phase 1.5: Req Expansion           -> refined-requirements.json (interactive discussion + CLI gap analysis)
           |                           (-y auto mode: auto-expansion, skip interaction)
Phase 2:   Product Brief            -> product-brief.md + glossary.json  (multi-CLI parallel analysis)
           |
Phase 3:   Requirements (PRD)      -> requirements/  (_index.md + REQ-*.md + NFR-*.md)
           |                           (RFC 2119 keywords, data model definitions)
Phase 4:   Architecture            -> architecture/  (_index.md + ADR-*.md, multi-CLI review)
           |                           (state machine, config model, error handling, observability)
Phase 5:   Epics & Stories         -> epics/  (_index.md + EPIC-*.md)
           |
Phase 6:   Readiness Check         -> readiness-report.md + spec-summary.md
           |                           (terminology + scope consistency validation)
           ├── Pass (>=80%): Handoff to execution workflows
           ├── Review (60-79%): Handoff with caveats
           └── Fail (<60%): Phase 6.5 Auto-Fix (max 2 iterations)
                 |
Phase 6.5: Auto-Fix               -> Updated Phase 2-5 documents
                 |
                 └── Re-run Phase 6 validation

Input Parsing:
   |- Parse $ARGUMENTS: extract idea/topic, flags (-y, -c, -m)
   |- Detect mode: new | continue
   |- If continue: read spec-config.json, resume from first incomplete phase
   |- If new: proceed to Phase 1

Phase 1: Discovery & Seed Analysis
   |- Ref: phases/01-discovery.md
   |- Generate session ID: SPEC-{slug}-{YYYY-MM-DD}
   |- Parse input (text or file reference)
   |- Gemini CLI seed analysis (problem, users, domain, dimensions)
   |- Codebase exploration (conditional, if project detected)
   |- Spec type selection: service|api|library|platform (interactive, -y defaults to service)
   |- User confirmation (interactive, -y skips)
   |- Output: spec-config.json, discovery-context.json (optional)

Phase 1.5: Requirement Expansion & Clarification
   |- Ref: phases/01-5-requirement-clarification.md
   |- CLI gap analysis: completeness scoring, missing dimensions detection
   |- Multi-round interactive discussion (max 5 rounds)
   |  |- Round 1: present gap analysis + expansion suggestions
   |  |- Round N: follow-up refinement based on user responses
   |- User final confirmation of requirements
   |- Auto mode (-y): CLI auto-expansion without interaction
   |- Output: refined-requirements.json

Phase 2: Product Brief
   |- Ref: phases/02-product-brief.md
   |- 3 parallel CLI analyses: Product (Gemini) + Technical (Codex) + User (Claude)
   |- Synthesize perspectives: convergent themes + conflicts
   |- Generate glossary.json (terminology from product brief + CLI analysis)
   |- Interactive refinement (-y skips)
   |- Output: product-brief.md (from template), glossary.json

Phase 3: Requirements / PRD
   |- Ref: phases/03-requirements.md
   |- Gemini CLI: expand goals into functional + non-functional requirements
   |- Generate acceptance criteria per requirement
   |- RFC 2119 behavioral constraints (MUST/SHOULD/MAY)
   |- Core entity data model definitions
   |- Glossary injection for terminology consistency
   |- User priority sorting: MoSCoW (interactive, -y auto-assigns)
   |- Output: requirements/ directory (_index.md + REQ-*.md + NFR-*.md, from template)

Phase 4: Architecture
   |- Ref: phases/04-architecture.md
   |- Gemini CLI: core components, tech stack, ADRs
   |- Codebase integration mapping (conditional)
   |- State machine generation (ASCII diagrams for lifecycle entities)
   |- Configuration model definition (fields, types, defaults, constraints)
   |- Error handling strategy (per-component classification + recovery)
   |- Observability specification (metrics, logs, health checks)
   |- Spec type profile injection (templates/profiles/{type}-profile.md)
   |- Glossary injection for terminology consistency
   |- Codex CLI: architecture challenge + review
   |- Interactive ADR decisions (-y auto-accepts)
   |- Output: architecture/ directory (_index.md + ADR-*.md, from template)

Phase 5: Epics & Stories
   |- Ref: phases/05-epics-stories.md
   |- Gemini CLI: requirement grouping into Epics, MVP subset tagging
   |- Story generation: As a...I want...So that...
   |- Dependency mapping (Mermaid)
   |- Interactive validation (-y skips)
   |- Output: epics/ directory (_index.md + EPIC-*.md, from template)

Phase 6: Readiness Check
   |- Ref: phases/06-readiness-check.md
   |- Cross-document validation (completeness, consistency, traceability)
   |- Quality scoring per dimension
   |- Terminology consistency validation (glossary compliance)
   |- Scope containment validation (PRD <= Brief scope)
   |- Output: readiness-report.md, spec-summary.md
   |- Handoff options: lite-plan, req-plan, plan, issue:new, export only, iterate

Phase 6.5: Auto-Fix (conditional, triggered when Phase 6 score < 60%)
   |- Ref: phases/06-5-auto-fix.md
   |- Parse readiness-report.md for Error/Warning items
   |- Group issues by originating Phase (2-5)
   |- Re-generate affected sections via CLI with error context
   |- Re-run Phase 6 validation
   |- Max 2 iterations, then force handoff
   |- Output: Updated Phase 2-5 documents

Complete: Full specification package ready for execution

Phase 6 → Handoff Bridge (conditional, based on user selection):
   ├─ lite-plan: Extract first MVP Epic description → direct text input
   ├─ plan / req-plan: Create WFS session + .brainstorming/ bridge files
   │   ├─ guidance-specification.md (synthesized from spec outputs)
   │   ├─ feature-specs/feature-index.json (Epic → Feature mapping)
   │   └─ feature-specs/F-{num}-{slug}.md (one per Epic)
   ├─ issue:new: Create issues per Epic
   └─ context-search-agent auto-discovers .brainstorming/
       → context-package.json.brainstorm_artifacts populated
       → action-planning-agent consumes: guidance_spec (P1) → feature_index (P2)

// Session ID generation
const slug = topic.toLowerCase().replace(/[^a-z0-9\u4e00-\u9fff]+/g, '-').slice(0, 40);
const date = new Date().toISOString().slice(0, 10);
const sessionId = `SPEC-${slug}-${date}`;
const workDir = `.workflow/.spec/${sessionId}`;

Bash(`mkdir -p "${workDir}"`);

.workflow/.spec/SPEC-{slug}-{YYYY-MM-DD}/
├── spec-config.json              # Session configuration + phase state
├── discovery-context.json        # Codebase exploration results (optional)
├── refined-requirements.json     # Phase 1.5: Confirmed requirements after discussion
├── glossary.json                 # Phase 2: Terminology glossary for cross-doc consistency
├── product-brief.md              # Phase 2: Product brief
├── requirements/                 # Phase 3: Detailed PRD (directory)
│   ├── _index.md                 #   Summary, MoSCoW table, traceability, links
│   ├── REQ-NNN-{slug}.md         #   Individual functional requirement
│   └── NFR-{type}-NNN-{slug}.md  #   Individual non-functional requirement
├── architecture/                 # Phase 4: Architecture decisions (directory)
│   ├── _index.md                 #   Overview, components, tech stack, links
│   └── ADR-NNN-{slug}.md         #   Individual Architecture Decision Record
├── epics/                        # Phase 5: Epic/Story breakdown (directory)
│   ├── _index.md                 #   Epic table, dependency map, MVP scope
│   └── EPIC-NNN-{slug}.md        #   Individual Epic with Stories
├── readiness-report.md           # Phase 6: Quality report
└── spec-summary.md               # Phase 6: One-page executive summary

{
  "session_id": "SPEC-xxx-2026-02-11",
  "seed_input": "User input text",
  "input_type": "text",
  "timestamp": "ISO8601",
  "mode": "interactive",
  "complexity": "moderate",
  "depth": "standard",
  "focus_areas": [],
  "spec_type": "service",
  "iteration_count": 0,
  "iteration_history": [],
  "seed_analysis": {
    "problem_statement": "...",
    "target_users": [],
    "domain": "...",
    "constraints": [],
    "dimensions": []
  },
  "has_codebase": false,
  "refined_requirements_file": "refined-requirements.json",
  "phasesCompleted": [
    { "phase": 1, "name": "discovery", "output_file": "spec-config.json", "completed_at": "ISO8601" },
    { "phase": 1.5, "name": "requirement-clarification", "output_file": "refined-requirements.json", "discussion_rounds": 2, "completed_at": "ISO8601" },
    { "phase": 3, "name": "requirements", "output_dir": "requirements/", "output_index": "requirements/_index.md", "file_count": 8, "completed_at": "ISO8601" }
  ]
}