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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 v2.1.220 ·

Auto-mode classifier requests now send a new beta header

Auto mode's permission classifier now tags its requests with a beta marker on Anthropic-hosted sessions.

Under the hood New Features
JSON All of v2.1.220
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
PermissionsArea: what it touches
New FeaturesKind: in v2.1.220,
New FeaturesSection of the release
What

The permission classifier used by auto mode attaches a beta descriptor to its API requests, where the previous build sent none. Both classifier stages now carry it.

Details
  • Registers WA("auto_mode_classifier", "auto-mode-classifier-2026-07-16") and adds it to the frozen known-betas list, so it is also reachable through the header lookup map.
  • In 2.1.219 the classifier's request builder was a stub that unconditionally returned an empty extraBetas array; it now returns this beta.
  • Gated on provider being "firstParty" and the base URL being api.anthropic.com. Suppressed by CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS or hipaa mode, in which case the list stays empty.
Evidence

auto-mode-classifier-2026-07-16

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Read from
Names in the bundleCLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS

See this entry in the whole of v2.1.220 →

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