v13.12.1

adbar/trafilaturav13.12.1Jul 23, 2026by thedotmack

AI Summary

Critical fix to prevent an infinite worker restart loop caused by plugin upgrades using modification time (mtime) for version resolution.

Key Highlights

Fixes worker restart storm triggered by plugin upgrades.
Resolvers now rank cache directories by version instead of mtime.
Prevents hundreds of processes from spawning during upgrades.

Full Release Notes

## Critical fix: worker restart storm

Fixes an infinite worker restart loop triggered by plugin upgrades. The worker-script resolver ranked plugin cache directories by **mtime**, so when Claude Code stamped a superseded version dir with `.orphaned_at` (bumping its mtime), every restart respawned the **old** version while hooks on the new version kept demanding a restart — spawning hundreds of processes until the host machine exhausted its process table.

All four resolvers (worker successor, MCP launcher, Codex Windows launcher, POSIX hook prelude) now rank cache dirs by **version** — never mtime — skip orphan-stamped dirs, and share one deterministic version oracle with the staleness detector (`checkVersionMatch`), making the restart loop structurally impossible.

**Recommended upgrade for all users.** Note: the vulnerable resolver is the one running *during* an upgrade, so machines are protected from the next upgrade onward.

Details: #3371