react-doctor/require-reduced-motion

Project may ship non-essential motion without an observable reduced-motion policy; confirm library defaults and real animation use before changing code

Validation prompt

Confirm the detector match and collect the required evidence before deciding whether an edit is warranted.

This project-level heuristic fires once on package.json when dependencies include a known motion library (framer-motion/motion, react-spring, gsap, @react-spring/*, react-native-reanimated, and others) and a text scan of *.ts/*.tsx/*.js/*.jsx/*.css/*.scss finds none of prefers-reduced-motion, useReducedMotion, MotionConfig, or reducedMotion. Confirm the dependency actually ships non-essential spatial, parallax, autoplaying, looping, or interaction-triggered animation and that no app, design-system, component-library, generated, MDX, HTML, Less/Stylus, native, or user-setting layer already handles the preference. Suppress an unused/non-animating dependency. Also suppress supported React Native Reanimated versions whose animations retain the default ReduceMotion.System behavior (the default in Reanimated 3.5+ and 4); investigate only explicit ReduceMotion.Never, custom animation paths, or older versions. WCAG 2.3.3 Animation from Interactions is Level AAA, so absence is not a blanket WCAG failure; separately assess auto-started moving content under WCAG 2.2.2 and flashes under 2.3.1/2.3.2.

Evidence boundary

The diagnostic proves only that the detector’s modeled source pattern matched. It does not prove runtime impact, product intent, rendered failure, or that one remediation is correct.

Establish the environment, repository policy, exceptions, and required rendered or runtime evidence before deciding the occurrence.

Record one outcome:

• Confirmed failure: The required evidence establishes the violation.
• Rejected: A documented exception or false-positive predicate applies.
• Needs evidence: Named evidence can still be collected.
• Unavailable: Required evidence cannot be collected in this run.
• Waived with evidence: An authorized, scoped exception applies to an established failure.
• Observation: The review records an optional tradeoff without claiming a defect.

A waiver records its scope, authority, evidence, and review condition. It is not a pass or false positive.

Default severity is registry metadata. Use the occurrence’s JSON severity after repository configuration when ordering real findings.

Fix prompt

Apply this candidate correction only after the required evidence confirms the risk.

Implement a policy at the narrowest layer that owns each animation, preserving the same content, focus behavior, and final state. For Motion, <MotionConfig reducedMotion="user"> disables transform and layout animation while opacity and color can remain; use useReducedMotion() when a specific parallax, autoplay, or large spatial effect needs a static or brief local-fade alternative. For react-spring, use its useReducedMotion support. For GSAP, use gsap.matchMedia() with (prefers-reduced-motion: reduce), choose reduced distances/durations or a static end state, and call revert() during cleanup. Reanimated 3.5+/4 already defaults animations to ReduceMotion.System; remove explicit Never overrides or customize with its hook/config only when needed. For CSS, add targeted @media (prefers-reduced-motion: reduce) rules that remove spatial movement, smooth scrolling, parallax, and autoplay while optionally retaining a short local opacity/color transition. Do not apply a universal 0.01ms !important reset: it can break completion callbacks, sequencing, focus, and essential state. Keep essential information available in a calm or static form. See https://www.w3.org/WAI/WCAG22/Understanding/animation-from-interactions

Repository-wide copy prompt

Use this repository-wide prompt only after validating each occurrence. For one occurrence, use the guidance above.