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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 v2.1.72

Effort Level "max" and Persistence

The effort level system now supports a "max" level (restricted to Opus 4.6 models) and persists the effort setting across sessions.

Details
  • New effortLevel setting in user config: accepts "low", "medium", or "high" (persisted)
  • "max" is session-scoped and not persisted to disk
  • If "max" is requested on a non-Opus 4.6 model, it silently falls back to "high"
  • The status line now shows effort level with visual indicators: ○ low, ◐ medium, ● high, ◉ max
  • Effort level display text appears in the status bar with a 20-second timeout
Evidence

New effort schema and display functions (search for "Persisted effort level", "opus-4-6")

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 v2.1.72 →