Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.239 Home All releases olderv2.1.238 v2.1.240newer
Claude Code v2.1.239

Background job renames no longer fight between processes

You'll notice
Useful2 Signal2
Elsewhere

Two Claude Code processes sharing a background job no longer overwrite each other's job names.

What

When two Claude Code processes touch the same background job, a name written by the other process with a collision suffix is now left alone and logged rather than being rewritten and attributed to a hook.

Details
  • The log line is [jobStateNameSync] ignoring a collision-suffixed name another process wrote to this job, after which the sync returns without writing.
  • The sync body runs in a loop that finishes the current pass then repeats if more work arrived, so overlapping triggers coalesce into one run instead of racing.
  • Unconditional, with no setting involved.
Evidence

[jobStateNameSync] ignoring a collision-suffixed name another process wrote to this job

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.239 →