App error boundary recovery

Rule handbook metadata

Rule: DET.APP.ERROR_BOUNDARY_RECOVERY · lane deterministic
Page status: current
page_version: aeb27af67134ea35aa162ebb85e6bcb960b99f81a56052d774d4ea3d110d5392
generated_at: 2026-08-13T02:31:57.028Z
registry_fingerprint: aef1de6082cf0f50d463783c843dee0ffb9132fbd5ed4ea6e5bb3f031f359c72

How this rule is fixed

Pilot deterministic fixer: plan_only · harness mode live_scenario · verify live_scenario.

See fixer module for plan_only in lib/ux-deterministic-fixers/.

Detection module: docs/design/ux-audit/deterministic-design-rules.md#det-app-error-boundary-recovery. Scroll down for Before / After examples and Evidence and remediation steps.

Purpose

Failed routes show recovery UI instead of a blank shell.

Evidence and remediation

Run tools/website-ux-auditor/auditor-tests/invoke-det-ruleset-harness.sh --only-rule DET.APP.ERROR_BOUNDARY_RECOVERY. Implementation: tools/website-ux-auditor/design-rules/deterministic/generated/det-app-error-boundary-recovery.check.js.