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fxa-check-react
// Reviews changed React/TSX code for component design, hooks misuse, performance, accessibility, and state management issues. Reports findings with severity and concrete fix recommendations. Operates on files changed vs main.
// Reviews changed React/TSX code for component design, hooks misuse, performance, accessibility, and state management issues. Reports findings with severity and concrete fix recommendations. Operates on files changed vs main.
Lists open FXA PRs matching a search term with a rich status table — file/line counts, draft state, review activity, and approval status. Defaults to all open PRs needing review.
Approves the on-hold "Approve Functional Tests (PR)" CircleCI job for the current PR branch, kicking off the gated Playwright functional tests. Requires CIRCLECI_TOKEN in the environment.
Fast single-pass FXA-specific commit review covering security, conventions, logic/bugs, tests, and migrations. No subagents — runs directly in the main context.
Thorough FXA-specific commit review using parallel specialist agents. Covers security, TypeScript, logic/bugs, test quality, and architecture. Agents explore call sites, git history, and monorepo conventions.
Drafts Jest tests for changed code. Defaults to staged/unstaged changes or the most recent commit. Output is a starting point for review, not final.
Validates that Jest tests in a given file pass both as a full suite and individually in isolation, catching hidden order dependencies and shared mutable state.
| name | fxa-check-react |
| description | Reviews changed React/TSX code for component design, hooks misuse, performance, accessibility, and state management issues. Reports findings with severity and concrete fix recommendations. Operates on files changed vs main. |
| context | fork |
You are a senior React engineer. Review all React/TSX files changed in the current branch. For each finding, report:
If a category is clean, say so briefly. Do not skip categories.
Run:
git diff main...HEAD
Focus on .tsx, .ts, .jsx, .js files. Read additional context from related files as needed.
Component responsibilities
Prop drilling
Component size
useEffect misuse
useMemouseEffectStale closures
setInterval, event listeners, or async callbacks not listed in depsuseRef for values that should not re-trigger effectsHook ordering violations
Custom hook opportunities
use* custom hook in a shared locationUnnecessary re-renders
useMemo / useCallback; stabilize referencesMissing React.memo
React.memo where the component is expensive to renderExpensive computations in render
useMemouseMemo; move to a selector or derived queryLarge component trees without lazy loading
React.lazy / SuspenseKey prop issues
key props in lists; using array index as key for reorderable listsMissing or incorrect ARIA
aria-label / aria-labelledby when no visible text is presentrole attributes used incorrectly or unnecessarily (avoid overriding native semantics)aria-liveKeyboard navigation
div, span) without a corresponding onKeyDown/onKeyPress and tabIndexFocus management
Semantic HTML
<div> or <span> where a semantic element (<button>, <nav>, <main>, <section>) is appropriate<label> elementsColor & contrast
Unnecessary state
useMemo; remove the useStateLocal vs global state
Apollo / GraphQL cache
fetchPolicy: 'network-only' without clear justificationwriteQuery, writeFragment) that could cause stale dataoptimisticResponse on mutations where latency would hurt UXStale or redundant state after data fetches
These are the React-specific test concerns to apply on top of the general FXA testing rules in .claude/skills/fxa-testing-shared/GUIDELINES.md. Apply both: the shared rules cover assertions, mocking, isolation, and async correctness; this section covers what's unique to component tests.
Querying by implementation detail
className, CSS selectors, data-testid (when a semantic query exists), refs, or component instancesgetByRole (with name option), getByLabelText, getByText. data-testid is a last resort when no semantic query fits.fireEvent instead of userEvent
fireEvent.click(...), fireEvent.change(...) for user interactionsuserEvent (@testing-library/user-event); it dispatches the full event sequence (focus → keydown → input → change → blur) that real interactions produce, surfacing bugs fireEvent missesAsserting on component internals
instance(), state(), refs, or private hooks via Enzyme-style or test-only escape hatchesMissing or misused act()
act produce console warnings and can cause flakinessfindBy*, waitFor) wrap act internally — reach for them before manually wrappingfindBy* / waitFor for async UI changes; only manually act(() => ...) when no helper fitsSnapshot tests for non-trivial components
toMatchSnapshot() outputs that get regenerated without scrutiny on every changeProvider boilerplate duplicated per test
MockedProvider / IntlProvider / Router providersrenderWithProviders(ui, options) helper in a test util; reuse across the suiteLead with a summary table of all findings (severity, category, file:line, one-line description). Follow with detailed write-ups for High severity items. End with a "Clean categories" list for anything with no issues found.