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Sweep 02 Oct 2026 · 18:55Z Build v2.1.288 509 read Stable v2.1.285 Latest v2.1.287 Next v2.1.288 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.287 ·

The event delivery tool description can carry custom guidance

The description of the event delivery tool can now use a custom warning about untrusted content and extra text, with the old sentence as default

Under the hood Internal Changes
JSON All of v2.1.287
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
ChannelsArea: what it touches
Internal ChangesKind: in v2.1.287,
Internal ChangesSection of the release
What

The description Claude reads for the tool that delivers events used to have a fixed sentence warning that event content may come from untrusted sources. That sentence can now be replaced with a custom one, and extra text can be added after it. Without either, the original sentence is used.

Why

By default the text is unchanged. Some places that use this tool may now show Claude different wording.

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 where, if anywhere, the custom wording is used.

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