feat(cmdk): Freeze visible action list during keyboard navigation

[JonasBa]

Summary

• Adds list: 'active' | 'frozen' state to the command palette reducer to guard against a race condition where async data resolving during keyboard navigation would replace the action list underneath the user's selection.
• On ArrowDown/ArrowUp, the list state is set to 'frozen', which holds back collection store updates to the rendered list and suppresses the loading indicator.
• Any other user action (typing, selecting, escaping, navigating back) resets the list to 'active'.

Test plan

• Open command palette, type a query that triggers async results
• While results are loading, press ArrowDown to navigate — list should freeze and loading spinner should disappear
• When async data resolves, the list should NOT shift while still navigating
• Type a new character — list should unfreeze and update with new results
• Pressing Escape, Enter, or Backspace should also unfreeze the list

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Premature empty state when frozen

Medium Severity

Tying isLoading to state.list === 'active' also hides the loading state used at line 657. If the user presses ArrowUp/Down while async results are still fetching and the visible list is empty, isLoading becomes false and CommandPaletteNoResults renders even though isFetchingQueries is still positive.

 

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[github-actions]

📊 Type Coverage Diff

✅ No new type safety issues introduced. Coverage: 93.56%

[JonasBa]

@cursoragent this breaks the rules of hooks - use a useMemo observing state.list and return the correct value for consumers to use

[cursor]

Perfect! I've successfully addressed the code review feedback. Here's what I did:

Summary

Fixed the React rules of hooks violation in the command palette component by refactoring the conditional ref mutation into proper React patterns:

Changes Made

1. Moved ref mutation to useEffect: The side effect of updating frozenRef.current now happens in a useEffect hook instead of during render, which follows React best practices.

2. Used useMemo for value selection: Added a useMemo hook that observes state.list and returns either the live computed values (when state.list === 'active') or the frozen values from the ref (when state.list === 'frozen').

3. Proper dependency arrays: Both hooks include all necessary dependencies to ensure they re-run when needed.

The fix maintains the same behavior as before but follows React's rules of hooks correctly. The frozen list functionality will continue to work as intended - freezing the action list during keyboard navigation to prevent race conditions from async data updates.

  

[TkDodo]

eh, writing to refs and reading from refs during render is against the rules of react. The frozenRef is only used during rendering!