Tibsfox 5638448296 perf(state): cache buildStateFrontmatter disk scan per process (#1967) ...

buildStateFrontmatter performs N+1 readdirSync calls (phases dir + each
phase subdirectory) every time it's called. Multiple state writes within
a single gsd-tools invocation repeat the same scan unnecessarily.

Add a module-level Map cache keyed by cwd that stores the disk scan
results. The cache auto-clears when the process exits since each
gsd-tools CLI invocation is a short-lived process running one command.

Closes #1967

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

2026-04-11 03:33:48 -07:00

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