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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 ·

System prompt line about ending a conversation has changed

The line in Claude Code's system prompt that mentions the EndConversation tool has changed

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
System PromptArea: what it touches
Internal ChangesKind: in v2.1.304,
Internal ChangesSection of the release

Unclear It is not clear what the line now says or how it affects the model.

What

The system prompt, the standing instructions Claude Code gives the model, has a line about the EndConversation tool, one of the tools loaded only when needed. That line has changed.

Why

Nothing you need to do is different.

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 doubtIt is not clear what the line now says or how it affects the model.

See this entry in the whole of v2.1.304 →

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