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Sweep 29 Sep 2026 · 18:10Z Build v2.1.285 506 read Stable v2.1.280 Latest v2.1.285 Next v2.1.285 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.285 ·

Session-start hook messages are added to the conversation one at a time

Messages from hooks that run when a session starts are now inserted into the conversation individually instead of by rebuilding the whole list

Under the hood Internal Changes
JSON All of v2.1.285
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
HooksArea: what it touches
Internal ChangesKind: in v2.1.285,
Internal ChangesSection of the release
What

A hook is a command you set up to run automatically at a set moment, such as when a session (one conversation with Claude Code) starts. Claude Code now places the messages from those start-up hooks into the conversation one at a time, and keeps track of which hook messages it is placing. Previously it rebuilt the whole conversation list with the hook messages put at the front.

Why

This is mostly internal, but it can change when hook messages appear in the conversation.

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 whether anything looks different to a user.

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