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Sweep 08 Oct 2026 · 18:53Z Build v2.1.295 516 read Stable v2.1.286 Latest v2.1.295 Next v2.1.295 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.290 ·

Background sessions no longer queue slash commands while starting

Messages sent to a starting background session are no longer queued if they are slash commands, and replies may return a new code

You'll notice Improvements
JSON All of v2.1.290
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SessionsArea: what it touches
ImprovementsKind: in v2.1.290,
ImprovementsSection of the release

Unclear How ENOREPLY is shown to the user is unclear.

What

When you send something to a background session that is still starting, Claude Code holds it in a queue until the session is ready. This has changed:

  • Slash commands, and anything that is not a plain prompt, are no longer queued.
  • A reply to a session that is still starting may now return the code ENOREPLY instead of ERESPAWNING.
  • Restarting a session with no messages now tries to recover it first.
Why

This changes what happens to messages you send to a background session while it is starting up.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtHow `ENOREPLY` is shown to the user is unclear.

See this entry in the whole of v2.1.290 →

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