Sweep follow-up to #2641's lib/fs-utils.ts helper: bun on Windows throws EEXIST from a recursive mkdir on an existing dir, so every unguarded recursive mkdirSync on a Windows-reachable path is a latent crash. Converted: bin/gstack-decision-log (unguarded, runs on every decision log — the second call on any machine hits the pre-existing projects dir), bin/gstack-evidence logsDir + ledger dir sites, and bin/gstack-redact-prepush's skip-log site (already try-wrapped, so its failure mode was a silent skip-log loss rather than a crash — the fix makes the log survive). The ~15 remaining gbrain/mac-lane sites are deliberately left alone.
Regression: fs-utils.test.ts drives gstack-decision-log twice, the second run under the bun-Windows EEXIST preload fixture — the pre-sweep code exits 1 with EEXIST there; verified red against v1.68.3.0.
Garry Tan
361dfebcbe