Add three new commands that extract structured data from GSD files,
reducing context usage by returning only parsed fields instead of
raw file content:
- phase-plan-index: Plans grouped by wave with metadata (id, wave,
autonomous, objective, files_modified, task_count, has_summary)
- state-snapshot: Parsed STATE.md fields (current phase, decisions,
blockers, session info)
- summary-extract: Frontmatter extraction with optional --fields filter
Update workflows to use new commands:
- execute-phase: Use phase-plan-index instead of ls + grep loop
- plan-phase: Use state-snapshot for decisions
- research-phase: Use state-snapshot for decisions
- complete-milestone: Use summary-extract for one-liners
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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