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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.2

Permission Explainer [Gradual Rollout]

What

A new feature that analyzes tool use requests and displays risk assessments (LOW/MEDIUM/HIGH) with explanations when Claude requests permissions.

Details
  • Evaluates commands before execution and categorizes risk levels
  • LOW risk: Standard dev workflows (git operations, tests, installs, builds)
  • MEDIUM risk: Bulk deletions, complex shell pipelines, config modifications
  • HIGH risk: Dangerous or irreversible operations, system-level changes
  • Only displays warnings for MEDIUM and HIGH risk actions
  • Controlled by tengu_permission_explainer feature flag
  • Can be enabled via PERMISSION_EXPLAINER_ENABLED=true environment variable
Evidence

Hu2() at line 417436 (permission explainer generator, contains "tengu_permission_explainer")

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.2 →