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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 v2.0.71

Thinking Mode Toggle Hotkey

What

New keyboard shortcut to toggle extended thinking mode on/off directly from the prompt input.

Usage

Press alt+t (or option+t on macOS) while focused on the prompt input to open the thinking toggle picker.

Details
  • Opens a dedicated picker UI showing "Enabled" and "Disabled" options
  • Displays a warning when changing mid-conversation: "Changing mid-conversation may reduce quality. For best results, set this at the start of a session."
  • Logs telemetry event tengu_thinking_toggled_hotkey for tracking usage
  • Press Enter to confirm selection, Esc to cancel
Evidence

$r2() at line 464580 (ThinkingPicker component, contains "Toggle thinking mode" and "Enable or disable thinking for this session") and HsA at line 179809 (hotkey definition, displayText: "alt+t")

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 v2.0.71 →