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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Background terminals now also kill the REPL session behind them

Killing a background terminal now also ends the REPL process behind it.

You'll notice Improvements
JSON All of v2.1.251
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Background TasksArea: what it touches
ImprovementsKind: in v2.1.251,
ImprovementsSection of the release
What

A background pseudo-terminal now looks up and remembers the session id of the REPL process it belongs to when it first connects, and signals that session too when the terminal is killed or exits, so stray processes are less likely to survive.

Details
  • The session id is surfaced through an onRepl callback on the background-pty client.
  • Skipped on Windows.
Evidence

onRepl

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

See this entry in the whole of v2.1.251 →

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