brainstorm-beaglelisted

# Brainstorm: Ideas Into Specs Turn a fuzzy idea into a comprehensive, implementation-free project spec through collaborative dialogue. The output is a standalone spec document — structured enough for any agentic system to consume, clear enough for a human to act on. It captures WHAT and WHY, never HOW. <hard_gate> Do NOT write any code, create implementation plans, scaffold projects, or take any implementation action. This skill produces a SPEC DOCUMENT only. Every project goes through this process regardless of perceived simplicity — "simple" projects are where unexamined assumptions waste the most work. </hard_gate> ## Workflow Complete these steps in order: 1. **Check for a concept brief** — if `.beagle/concepts/<slug>/brief.md` exists for this idea, ingest it and skip most of steps 2-4 (see *Concept brief ingestion* below) 2. **Explore context** — read project files, docs, git history, existing specs (lighter pass if a brief is present) 3. **Assess scope** — is this one spec or does it need decomposition? 4. **Ask clarifying questions** — one at a time, follow the thread (few to none if a brief is present) 5. **Propose 2-3 directions** — high-level product approaches with tradeoffs 6. **Draft spec** — write the structured spec document 7. **Self-review** — check for completeness, contradictions, implementation leakage (see `references/spec-reviewer.md`) 8. **User review** — present for approval, iterate if needed 9. **Write to disk** — save to `.beagle/concepts/<sl