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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.265 ·

Hook registry gains command.describe as a core hook event

Claude Code adds a new internal hook event called command.describe

Under the hood Internal Changes
JSON All of v2.1.265
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
HooksArea: what it touches
Internal ChangesKind: in v2.1.265,
Internal ChangesSection of the release

Unclear What functionality actually uses the new command.describe hook is not established by this finding.

What

Claude Code's internal hook system (the machinery that lets different parts of the app react to events) now includes a new core event named command.describe, alongside existing ones like agent.offer, tool.describe, session.start, and the turn.start/turn.step/turn.complete events.

Why

This is internal plumbing rather than something a reader interacts with directly. It suggests Claude Code now has a defined point for describing commands, similar to how it already describes tools, but the finding doesn't say what consumes this event yet.

Read from
Names in the bundlecommand.describe
What the documentation says
Documented inclaude-code/plugins/mods/reference
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 doubtWhat functionality actually uses the new command.describe hook is not established by this finding.

See this entry in the whole of v2.1.265 →

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