Follow-up to #1919 (archive-then-remove core). Closes the remaining #1871
acceptance criteria so phase history is preserved across the full milestone
lifecycle, not just at phases.clear:
- #2 src/milestone.cts + src/phases-command-router.cts: extract shared
archivePhaseDirectories() helper; add cmdPhasesArchive (the previously
half-wired phases.archive alias now routes instead of erroring Unknown).
- #4 gsd-tools.cjs + src/milestone.cts: milestone complete archives phase
dirs by default (--no-archive-phases opts out; --archive-phases is now a
harmless no-op). complete-milestone.md updated to drop the redundant manual
Yes/Skip archive prompt.
- #3 gsd-core/workflows/new-milestone.md: §6 stages the archive move + source
removal (git add .planning/milestones/ .planning/phases/) in the same commit
as the milestone start, so the archive lands atomically — no orphaned
uncommitted deletions, no un-archived dirs inherited.
- docs/CLI-TOOLS.md (+ ja/zh/ko/pt) + help/modes/full.md: flag accuracy.
- tests: phases archive command (#2) + milestone complete default archive /
--no-archive-phases opt-out (#4). Goldens + workflow size baseline refreshed.
Closes#1871
92091d71f2