When ROADMAP.md marks a phase as [x] complete, trust that over the
disk file structure. Phases completed before GSD tracking started
(or via external tools) may lack PLAN/SUMMARY pairs but are still
done — the roadmap checkbox is the higher-authority signal.
Without this fix, completed phases show as "discussed" or "planned"
in /gsd:progress, causing incorrect routing and progress percentages.
Fixes#977
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>