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perf(workflow): limit prior-phase context to 3 most recent phases (#1969)

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When CONTEXT_WINDOW >= 500000 (1M models), the planner loaded ALL prior
phase CONTEXT.md and SUMMARY.md files for cross-phase consistency. On
projects with 20+ phases, this consumed significant context budget with
diminishing returns — decisions from phase 2 are rarely relevant to
phase 22.

Limit to the 3 most recent completed phases, which provides enough
cross-phase context for consistency while keeping the planner's context
budget focused on the current phase's plans.

Closes #1969

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Tibsfox
2026-04-10 11:45:20 -07:00
parent 6c2795598a
commit 2efce9fd2a
1 changed files with 5 additions and 4 deletions
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9
get-shit-done/workflows/plan-phase.md
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@@ -34,7 +34,7 @@ AGENT_SKILLS_CHECKER=$(node "$HOME/.claude/get-shit-done/bin/gsd-tools.cjs" agen
CONTEXT_WINDOW=$(node "$HOME/.claude/get-shit-done/bin/gsd-tools.cjs" config-get context_window 2>/dev/null || echo "200000")
```
When `CONTEXT_WINDOW >= 500000`, the planner prompt includes prior phase CONTEXT.md files so cross-phase decisions are consistent (e.g., "use library X for all data fetching" from Phase 2 is visible to Phase 5's planner).
When `CONTEXT_WINDOW >= 500000`, the planner prompt includes the 3 most recent prior phase CONTEXT.md and SUMMARY.md files so cross-phase decisions are consistent (e.g., "use library X for all data fetching" from Phase 2 is visible to Phase 5's planner). Limited to 3 to stay within context budget on large projects.
Parse JSON for: `researcher_model`, `planner_model`, `checker_model`, `research_enabled`, `plan_checker_enabled`, `nyquist_validation_enabled`, `commit_docs`, `text_mode`, `phase_found`, `phase_dir`, `phase_number`, `phase_name`, `phase_slug`, `padded_phase`, `has_research`, `has_context`, `has_reviews`, `has_plans`, `plan_count`, `planning_exists`, `roadmap_exists`, `phase_req_ids`, `response_language`.
@@ -642,9 +642,10 @@ Planner prompt:
- {reviews_path} (Cross-AI Review Feedback - if --reviews)
- {UI_SPEC_PATH} (UI Design Contract — visual/interaction specs, if exists)
${CONTEXT_WINDOW >= 500000 ? `
**Cross-phase context (1M model enrichment):**
- Prior phase CONTEXT.md files (locked decisions from earlier phases — maintain consistency)
- Prior phase SUMMARY.md files (what was actually built — reuse patterns, avoid duplication)
**Cross-phase context (1M model enrichment — 3 most recent prior phases only):**
- CONTEXT.md files from the 3 most recent completed phases (locked decisions — maintain consistency)
- SUMMARY.md files from the 3 most recent completed phases (what was built — reuse patterns, avoid duplication)
- Skip phases older than the 3 most recent to stay within context budget
` : ''}
</files_to_read>