react-doctor/rendering-hydration-mismatch-time

Provide stable server/client time or identity data; reserve suppressHydrationWarning for an unavoidable one-level text or attribute mismatch

Validation prompt

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

Confirm a JSX expression contains new Date(), Date.now(), Math.random(), performance.now(), or crypto.randomUUID() and can render different server and first-client output. Distinguish display text from identity: suppressHydrationWarning can silence only an unavoidable one-level text/attribute mismatch and does not reconcile different DOM, IDs, relationships, or accessibility references.

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.

Prefer serializing a stable timestamp/value from the server or rendering a server-compatible initial snapshot. A mount Effect is a last resort because it adds a blank or flickering render. Use useId for DOM and accessibility IDs, and generate persistent record IDs in the data layer rather than during render. Use suppressHydrationWarning only on the exact element with an unavoidable text or attribute difference, never as an ID or structural fix. See https://react.dev/reference/react-dom/client/hydrateRoot#suppressing-unavoidable-hydration-mismatch-errors

Repository-wide copy prompt

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