Tom Boucher 8c16b1d338 fix(3663): preserve Hermes user-skill dirs under skills/gsd/ namespace ...

When kindPrefix === '' (Hermes: destSubpath=skills/gsd, no per-skill prefix),
startsWith('') always returns true so the prior removal loop would delete any
dir not in the staged set — including user-owned skill dirs.  Guard the entire
removal block behind kindPrefix !== '' so non-staged dirs are never pruned when
there is no prefix to distinguish GSD-owned from user-owned entries.

TDD: failing test added first asserting user-custom-skill is preserved through
a _syncGsdDir call with kindPrefix=''.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-17 01:12:00 -04:00

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