{"version":"2.1.220","anchor":"auto-mode-classifier-requests-now-send-a-new-beta-header","canonical_anchor":"auto-mode-classifier-requests-now-send-a-new-beta-header","heading":"Auto-mode classifier requests now send a new beta header","tier":"internal","area":"Permissions","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.220\/e\/auto-mode-classifier-requests-now-send-a-new-beta-header","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.220","markdown":"### Auto-mode classifier requests now send a new beta header\n\nAuto mode's permission classifier now tags its requests with a beta marker on Anthropic-hosted sessions.\n\n**What**\n\nThe 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.\n\n**Details**\n\n- 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.\n- In 2.1.219 the classifier's request builder was a stub that unconditionally returned an empty `extraBetas` array; it now returns this beta.\n- 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.\n\n**Evidence**\n\n`auto-mode-classifier-2026-07-16`\n\n- Area: Permissions\n- Names: `CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS`\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 0\/5"}