Design phase improvements #1 and #2:
#1 Bounded context:
- Pass architecture.md by path instead of embedding full contents
(the main unbounded size risk in this prompt)
- Cap decision-log context at last 20KB (matches dev phase)
- Add log_prompt_size guard, consistent with other phases
- Replace hardcoded JS/TS exploration hints with language-agnostic guidance
#2 File persistence:
- Add DESIGN_DIR config and persist each plan to <DESIGN_DIR>/<story>-design.md
- build_design_context_for_dev falls back to the persisted file when the
in-memory plan is empty, so resumed runs keep their design context
Story file remains inlined (small, bounded, needed in full by the planner).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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