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Sweep 27 Oct 2026 · 19:04Z Build v2.1.312 531 read Stable v2.1.308 Latest v2.1.312 Next v2.1.312 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.312 ·

Server classifier input rewrites are honoured and recorded, with new no-server-check tracking

Permission checks now honour and record server classifier input rewrites, can use a server arbiter when auto mode is off, and track missing server checks

Group of 2 Under the hood Internal Changes
JSON All of v2.1.312
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
Auto ModeArea: what it touches
Internal ChangesKind: in v2.1.312,
What probably matters to youSection of the release

Unclear It is not clear what condition lets the server check run with auto mode off, or what the announcement says.

What

In auto mode, a classifier, an automatic checker, decides whether Claude's actions may run without asking you. Part of that check can run on Anthropic's server. Several related pieces changed.

  • Input rewrite honoured: a server classifier input rewrite (serverClassifierInputRewrite, with keptVerdict) is now honoured.
  • Input rewrite recorded: when the input is rewritten, Claude Code also sets serverClassifierOwnInputRewritten. It sets serverClassifierInputRewrite to a record with cause turn_step, source mod, byLocalCode false and keptVerdict false. Before, only serverClassifierInputRewritten was set.
  • Remote dispatch: one remote call now passes localClassifierSite: "remoteDispatch".
  • Arbiter when off: when the mode is off, a call can still go through the server arbiter if an extra condition holds.
  • No-server-check state: each session now tracks when no server check happened, using noteNoServerCheck, noteNoServerCheckStoppedTurn, takeNoServerCheckStoppedTurn and takeNoServerCheckAnnouncement.
  • Stale records: dropAutoModeUnavailableResponsesOfOtherTurns clears records of auto mode being unavailable that were left from earlier turns.

Why

These change how permission checks behave when the server classifier rewrites the input or is missing. A server check can now apply even with auto mode off, and the session keeps track of when a server check could not happen.

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 what condition lets the server check run with auto mode off, or what the announcement says.

See this entry in the whole of v2.1.312 →

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