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Sweep 02 Oct 2026 · 18:55Z Build v2.1.288 509 read Stable v2.1.285 Latest v2.1.288 Next v2.1.288 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.288 ·

Brief tool rechecks attachments, and untrusted-folder agents are skipped

The Brief tool rechecks attachments when it runs, and agent definitions from untrusted folders are now skipped entirely

You'll notice Improvements
JSON All of v2.1.288
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Agent ToolsArea: what it touches
ImprovementsKind: in v2.1.288,
ImprovementsSection of the release
What

Several small checks are tighter:

  • The Brief tool now checks its attachments again at the moment it runs, not only beforehand, and refuses any that fail.
  • Settings that come from plugins are dropped, with a note in the log, when no enabled plugin supplies any.
  • Agent definitions (descriptions of helper agents Claude can hand work to) found in a folder you have not marked as trusted are now skipped as a whole. Before, only their hooks were skipped.
Why

These close small gaps where an attachment or an untrusted agent definition could slip through.

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 doubtWhether the skipping of untrusted-folder agent definitions is reachable in this build is not known.

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