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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.300 ·

Fewer mods count as prompt hooks when Claude Code checks for them

The check for mods that hook prompt submission now applies an extra test, so some mods that counted before no longer do

Under the hood Internal Changes
JSON All of v2.1.300
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
PluginsArea: what it touches
Internal ChangesKind: in v2.1.300,
Internal ChangesSection of the release

Unclear It does not say what the extra test checks, so it is unclear which mods are no longer counted.

What

Claude Code checks whether any loaded mod hooks into prompt submission through prompt.submit or UserPromptSubmit. Prompt submission is the moment you send a prompt, before Claude works on it. That check now applies an extra test to each mod, so some mods that counted before are no longer counted.

Why

This may change when sending a prompt waits for hooks to run.

Read from
Names in the bundleprompt.submitUserPromptSubmit
What the documentation says
prompt.submit Claude Code changelog modified, high confidence * Added `$.prompt.media` so a `prompt.submit` hook of a mod installed by managed settings can read the bytes of an image or document attached to the prompt see the edit
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Confirmed since Anthropic's documentation has since written up prompt.submit, on Use the mods API. Apart from `$.prompt.submit` and `$.command.run`, this handling of calls and background work after an interruption requires Claude Code v2.1.304 or later. plugins/mods/api see the edit
Confirmed since Anthropic's documentation has since written up UserPromptSubmit, on Intercept and control agent behavior with hooks. * `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit… agent-sdk/hooks see the edit
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 does not say what the extra test checks, so it is unclear which mods are no longer counted.
Anthropic's documentation agreesprompt.submit on Claude Code changelog
Anthropic's release notes agreeFixed a prompt that a mod's prompt.submit hook rewrote or dropped still being recorded as typed in the OpenTelemetry user_prompt event and…

See this entry in the whole of v2.1.300 →

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