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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 v2.1.304 ·

Monitor tool can tell Claude about monitors that stop before they expire

Claude can now be told that a monitor stopping after its reply is reported only with your next message

Under the hood Internal Changes
JSON All of v2.1.304
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Monitor ToolArea: what it touches
Internal ChangesKind: in v2.1.304,
Internal ChangesSection of the release

Unclear The condition that selects the new wording is not stated.

What

The Monitor tool lets Claude watch something over time. Its description, the text Claude reads about the tool, now has a second wording about when a monitor expires. Under some condition, it says that if a monitor stops after Claude's reply and before it expires, Claude learns only that it stopped, and only with your next message. Before, there was only the wording about re-arming the monitor.

Why

This changes what Claude expects to hear about a monitor that ends between turns.

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 doubtThe condition that selects the new wording is not stated.

See this entry in the whole of v2.1.304 →

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