Plugin mods gain a prompt-change event and richer permission…

Plugin mods gain a prompt-change event and richer permission decisions

Plugin mods get a prompt.change event, and permission decisions can now name a setting and a decider

Use it nowTier: how much it should matter to you

5Useful: my rating, 1 to 5

4Signal: worth watching, 1 to 5

PluginsArea: what it touches

New FeaturesKind: in v2.1.300, 14 Oct 26

What probably matters to youSection of the release

What

Plugin mods can run their own code when certain events happen in Claude Code. Three things changed:

prompt.change is a new event mods can respond to.
A permission decision from a mod can now include a setting and a decider, as well as a reason, a rule and a hook. Each one must be text.
The description of the prompt-screening ability now covers the prompt.submit, command.run, session.append and session.receive hooks, plus organization policy.

Why

Mods can react to more moments and can say more about why a permission was allowed or refused.

How sure we are

One source agreesOne thing we can check says the same as this entry.

Anthropic's release notes agreeAdded the prompt.change mod hook, raised when the prompt box's text changes without a typed edit: a recalled history entry, a clear, an…

See this entry in the whole of v2.1.300 →

The build it came inv2.1.300

14 Oct 2026 · 340 entries, this one is #11.

Use it now27
You'll notice165
Nothing to try yet4
Under the hood144

Either side of it

v2.1.299Older
v2.1.301Newer

Open the release →

Names in this entry

settingprompt.change
The prompt.change hook runs when a plugin or the landing screen changes the prompt box, and stops itself if plugins keep refilling it
settingprompt.submit
Hooks can now rewrite or drop your prompt before it is sent.
settingcommand.run
Plugins can now list, register, and run slash commands, and open or close a UI surface
settingappend
Transcript writing can be redirected to a different storage layer, but nothing turns that on here.
settingsession.receive
A new session.compact plugin hook can intercept and rewrite conversation compaction

Anthropic's notes

Upstream's own release notes for v2.1.300 name something this entry names, so the two are probably about the same change. Probably: the pairing is made on a shared name rather than on the words around it.

Added the prompt.change mod hook, raised when the prompt box's text changes without a typed edit: a recalled history entry, a clear, an undo, or a plugin's fill
Fixed a prompt that a mod's prompt.submit hook rewrote or dropped still being recorded as typed in the OpenTelemetry user_prompt event and interaction span, and in session title requests

Is this right?