{"version":"2.1.281","anchor":"claude-code-auto-mode-server-split-into-a-tri-state-user-swi","canonical_anchor":"setting-claude-code-auto-mode-server-now-controls-the-server","heading":"CLAUDE_CODE_AUTO_MODE_SERVER now forces server review of auto mode on or off for first-party users too","tier":"use","area":"Auto Mode","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281\/e\/claude-code-auto-mode-server-split-into-a-tri-state-user-swi","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281","markdown":"### CLAUDE_CODE_AUTO_MODE_SERVER now forces server review of auto mode on or off for first-party users too\n\nSetting CLAUDE_CODE_AUTO_MODE_SERVER now turns server-side review of auto mode actions on or off on first-party connections, not only third-party ones\n\n**Unclear.** The finding does not say which other parts of Claude Code now use the difference between unset and an explicit value.\n\n**What**\n\n`CLAUDE_CODE_AUTO_MODE_SERVER` is an environment variable (a setting read from your shell when Claude Code starts) that decides whether auto mode asks the server to review its actions instead of making its own classifier requests. It used to be read only for third-party providers. It is now also read on the first-party path, meaning a direct connection to Anthropic.\n\n- Set to a false value, it forces server review off.\n\n- Set to a true value, it turns server review on (internally the \"arbiter\" mode) without needing the `tengu_smooth_chipmunk` flag. It still requires the `tengu_iridescent_crystal` flag to be off and that the server has not refused the third-party classifier.\n\n- Left unset, the `tengu_smooth_chipmunk` flag decides as before, and its built-in default is off. A build-time override hook sits in that fallback but does nothing in this build.\n\n- The variable is now read once into `userServerClassifierSwitch`, which is empty when the variable is unset and otherwise true or false, so the code can tell \"not set\" apart from an explicit choice.\n\n- For third-party providers the result is unchanged: `thirdPartyServerClassifierEnabled` follows the variable when it is set, and otherwise is on unless `CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS` is set without `CLAUDE_CODE_PROVIDER_MANAGED_BY_HOST`.\n\n**Why**\n\nFirst-party users can opt in to server-side review ahead of the rollout flag, or opt out of it, with a single environment variable, whatever the remote flag says.\n\n- Area: Auto Mode\n- Names: `CLAUDE_CODE_AUTO_MODE_SERVER`\n- Tier: Use it now\n- Useful: 4\/5\n- Signal: 3\/5"}