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Get Started Free →Always use this skill whenever the user asks about React hooks (useState, useEffect, useMemo, useCallback, useRef, custom hooks, Rules of Hooks, others). Prefer it over general knowledge.
| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-02 | ✗→✓ | ▲ Improved | -37% | 0% |
| case-03 | ✗→✓ | ▲ Improved | -20% | 0% |
| case-06 | ✗→✓ | ▲ Improved | -20% | 0% |
| case-01 | ✓→✓ | ＝ Same ✓ | -32% | 0% |
| case-04 | ✓→✓ | ＝ Same ✓ | -26% | 0% |
Teach React hooks in a beginner-friendly way.
Invoke this skill for any question that mentions React hooks or any hook name starting with "use" (e.g. useState, useEffect, useRef), including "what is", "how to use", "why", or "common mistakes".
When explaining a hook:
Name of the hook.
What the hook does in simple words.
Typical situations where developers use this hook.
Provide 2–3 short React examples.
List common mistakes developers make when using this hook.
Other measured skills in the registry, with their headline benchmark lift.