SSH _before_execute() ran rsync unconditionally before every command,
adding ~2.3s overhead even when zero bytes were transferred. This was
80% of per-command latency (actual execution: ~0.6s).
Add (mtime, size) caching — matching the pattern Modal and Daytona
already use — to skip rsync when local files haven't changed:
- Per-file mtime+size check for credential files
- Directory fingerprint (set of relpath/mtime/size tuples) for skills
- --delete flag on skills rsync to prune uninstalled skills
- Track created remote dirs to avoid redundant mkdir -p calls
- Cache invalidation on rsync failure (remote may have been wiped)
- force=True parameter as escape hatch for debugging
Before: ~3s per SSH command (2.3s rsync + 0.6s execution)
After: ~0.6s per SSH command (mtime check + execution)
SSH test suite: 134s → 50s
alt-glitch
454edc7771