Spec Generator

Structured specification document generator producing a complete specification package (Product Brief, PRD, Architecture, Epics) through 6 sequential phases with multi-CLI analysis and interactive refinement. Document generation only - execution handoff to existing workflows (lite-plan, plan, req-plan).

Architecture Overview

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)