Auto mode cannot be enabled via UI despite meeting all requirements (Team plan, Sonnet 4.6, admin enabled)

Summary

Auto mode cannot be enabled through the UI. Clicking \"自動モード\" (Auto mode) in the permission mode selector shows a confirmation modal, but clicking \"有効にする\" (Enable) reverts back to \"許可を確認\" (Ask for approval) without enabling auto mode.

Environment

• Plan: Team
• Model: Claude Sonnet 4.6
• OS: macOS
• Claude Code version: Latest (v2.1.92 or later based on lastOnboardingVersion)

Requirements check

All documented requirements are met:

• [x] Team plan
• [x] Claude Sonnet 4.6 model selected
• [x] Organization admin has enabled Auto mode at claude.ai/admin-settings/claude-code
• [x] Allow auto mode toggle in Desktop Settings → Claude Code is ON
• [x] No permissions.disableAutoMode in settings

Root cause observed

Inspecting ~/.claude.json, the cached GrowthBook feature flag shows:

"ccr_auto_permission_mode": false

This flag is delivered from Anthropic's server and overrides local settings. After manually editing it to true and restarting, the server resets it back to false.

Also:

"tengu_auto_mode_config": {
  "enabled": "opt-in",
  "twoStageClassifier": true,
  "model": "claude-sonnet-4-6[1m]"
}

The tengu_auto_mode_config shows enabled: "opt-in" which suggests auto mode should be available, but ccr_auto_permission_mode: false appears to block it.

Additional context

• Auto mode was working previously for this account. It stopped working at some point, suggesting a server-side rollout or configuration change affected this account.
• Workaround: "permissions": { "defaultMode": "auto" } in ~/.claude/settings.json appears to activate auto mode at the session level (system shows "Auto Mode Active"), but the UI toggle remains non-functional.

Steps to reproduce

1. Open Claude Code Desktop (Team plan, Sonnet 4.6)
2. Click the permission mode selector
3. Select \"自動モード\" (Auto mode)
4. Click \"有効にする\" (Enable) in the confirmation modal
5. Mode reverts to \"許可を確認\" instead of switching to Auto mode

Expected behavior

Auto mode should be enabled after confirming the modal.