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Use when feature flag tests fail, flags need updating, understanding @gate pragmas, debugging channel-specific test failures, or adding new flags to React.
Passed 22 of 22 test cases with the skill, and 15 of 22 without it.
and 6 more in the full report
7 fixed15 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.
When running cross-channel diffing for React feature flags, what command option allows comparing two specific build channels side-by-side?
| Checked | Without skill | With skill |
|---|---|---|
| Specifies using the --diff option with the /flags command | Missed | Passed |
The instructions your model reads when the skill loads.
| File | Purpose |
|---|---|
packages/shared/ReactFeatureFlags.js | Default flags (canary), __EXPERIMENTAL__ overrides |
packages/shared/forks/ReactFeatureFlags.www.js | www channel, __VARIANT__ overrides |
packages/shared/forks/ReactFeatureFlags.native-fb.js | React Native, __VARIANT__ overrides |
packages/shared/forks/ReactFeatureFlags.test-renderer.js | Test renderer |
@gate pragma (test-level)Use when the feature is completely unavailable without the flag:
// @gate enableViewTransition
it('supports view transitions', () => {
// This test only runs when enableViewTransition is true
// and is SKIPPED (not failed) when false
});
gate() inline (assertion-level)Use when the feature exists but behavior differs based on flag:
it('renders component', async () => {
await act(() => root.render(<App />));
if (gate(flags => flags.enableNewBehavior)) {
expect(container.textContent).toBe('new output');
} else {
expect(container.textContent).toBe('legacy output');
}
});
test cases passed, vs 15 / 22 without
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