- name
- gsd-trace
- description
- Traces decisions and requirements through GSD artifacts. Use when user asks "why did we...", "what happened to...", or mentions decision history.
- version
- 1.0.0
- format
- 2025-10-02T00:00:00.000Z
- triggers
- ["user asks \"why did we"]
- updated
- 2026-04-25T00:00:00.000Z
- status
- ACTIVE
# GSD Decision Archaeology
Excavate GSD artifact timeline to reconstruct decision chains, requirement evolution, and phase rationale.
## Sources (authority order)
1. PROJECT.md Key Decisions
2. STATE.md Session Continuity
3. ROADMAP.md phase goals/criteria
4. Phase CONTEXT.md / RESEARCH.md
5. Plan SUMMARY.md outcomes
6. Git commit messages
7. Archived milestone docs
## Trace Process
1. **Identify query type** — decision rationale, requirement status, phase outcome, impact analysis
2. **Search sources** — start with highest authority, cross-reference downward
3. **Build timeline** — chronological events from artifacts
4. **Trace causality** — link decisions to requirements to implementation
5. **Answer directly** — cite specific sources and dates
## Query Types
| Type | Primary Sources |
|------|----------------|
| Why decision X? | PROJECT.md Key Decisions, RESEARCH.md |
| What happened to req Y? | REQUIREMENTS.md, STATE.md, milestones/ |
| Phase N outcome? | ROADMAP.md, SUMMARY files, git commits |
| What depends on X? | PLAN files, git history, code search |
| What was tried/abandoned? | RESEARCH.md, STATE.md |
## Limitations
Can only trace what GSD documented. Undocumented decisions, verbal discussions, and vague commit messages are untraceable.
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