The SDK bundled its own agents and workflows at ~17% the size of the real
ones, missing critical instructions like file naming conventions, scope
reduction rules, discovery protocols, and TDD integration. This caused
the planner to create a single PLAN.md instead of properly named
per-plan files (01-01-PLAN.md, 01-02-PLAN.md), breaking wave-based
parallel execution.
- Invert load priority: installed GSD agents/workflows first, SDK
bundled as last-resort fallback
- Replace @-reference stripping with resolution (read + inline content)
- Use full agent definitions instead of extracting only the <role> block
- Delete sdk/prompts/agents/ and sdk/prompts/workflows/ (13 files)
- Delete headless-prompts.test.ts (validated deleted files)
- Thread projectDir through sanitizePrompt for @-reference resolution
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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