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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 v2.1.36 7 Feb 2026

Interactive Fast Mode Toggle UI

The /fast command provides an interactive toggle interface with:

Current ON/OFF status with visual highlighting
Tab to toggle, Enter to confirm, Esc to cancel
Rate limit status and reset countdown when in cooldown
Link to documentation: https://code.claude.com/docs/en/fast-mode
Displays pricing information and any active discounts

Evidence

Toggle UI component (search for "Tab to toggle · Enter to confirm")

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

See this entry in the whole of v2.1.36 →