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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 v2.1.299 ·

Tool-use summaries are cleaned before use, and sessions record who kept them

Tool-use summary text is now cleaned up before Claude Code checks whether it is empty, and session records note which process kept a session

Under the hood Internal Changes
JSON All of v2.1.299
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SessionsArea: what it touches
Internal ChangesKind: in v2.1.299,
Internal ChangesSection of the release
What

When Claude uses a tool (an action such as reading a file or running a command), Claude Code can show a short summary of it. That summary text is now cleaned up before Claude Code checks whether it is empty. Claude Code's internal list of sessions (a session is one conversation with Claude) also gains a field recording which process kept a session, by its process ID and start time.

Why

These are small internal adjustments. In practice, a summary containing nothing meaningful should now be treated as empty.

See this entry in the whole of v2.1.299 →

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