[braboj]

Raises backend/errors from 91.7 to 98.3 with one instruction per rule.

Section	Change
Lead-in	Five broken lines naming two file paths → one sentence naming the templates
Classification	Lead-in and both mapping rules shortened; table unchanged
Propagation	Repository / service / handler layer labels → data-access code, domain errors, one central mapper
Recovery	Timeout, circuit breaker, degradation, consistency each one instruction; MUST kept
External failures	504 vs 502 stated directly; retry rule shortened
Unexpected errors	MUST kept on the outermost catch

• Why the layer labels go: Move the backend architecture preset to Imbra and retire backend-quality #2085 retired the handler → service → repository preset as one architecture; this file was the last to prescribe it
• MUST count unchanged (2); no SHOULD or MAY before or after
• Part of Raise every template's quality score to at least 95 #2106

Checks

• Smoke 35/35; conformance 12 passed, 0 failed, 1 not applicable; readings read
• Fork sync, redundancy audit, score ratchet, markdownlint, pre-commit hooks

No CHANGELOG entry: the rules are unchanged in meaning.

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