{"id":"operational-conventions-are-module-scoped","text":"Operational concerns — error signaling strategies (exceptions vs return codes vs None), eviction timing (eager vs lazy vs deferred), and failure reporting — are designed per-module with no cross-cutting conventions, meaning each module makes locally reasonable choices that collectively produce an unpredictable system-wide operational surface for callers.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["error-boundaries-are-module-local","eviction-timing-has-no-codebase-convention"],"outlist":[],"label":"Both nodes identify absent cross-cutting conventions in different operational dimensions; the emergent property is that operational unpredictability is systematic, not incidental"}],"dependents":["module-autonomy-spans-conventions-and-safety","module-isolation-is-pedagogical-and-architectural"],"metadata":{"last_reviewed":"2026-06-06T06:26:57","review_result":"pass"},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"operational-conventions-are-module-scoped","truth_value":"IN","reason":"SL justification valid","antecedents":["error-boundaries-are-module-local","eviction-timing-has-no-codebase-convention"],"label":"Both nodes identify absent cross-cutting conventions in different operational dimensions; the emergent property is that operational unpredictability is systematic, not incidental"},{"node":"error-boundaries-are-module-local","truth_value":"IN","reason":"SL justification valid","antecedents":["error-signaling-lacks-codebase-convention","none-return-collapses-distinct-failure-modes"],"label":"absence of codebase-wide error convention plus None-return collapse means every module defines its own failure vocabulary"},{"node":"error-signaling-lacks-codebase-convention","truth_value":"IN","reason":"SL justification valid","antecedents":["payment-error-strategy-split","kv-store-quorum-exception","click-aggregator-return-value-signaling","wallet-no-exceptions-caught"],"label":"Four distinct error signaling strategies across four modules with no shared pattern or base exception type"},{"node":"payment-error-strategy-split","truth_value":"IN","reason":"premise"},{"node":"kv-store-quorum-exception","truth_value":"IN","reason":"premise"},{"node":"click-aggregator-return-value-signaling","truth_value":"IN","reason":"premise"},{"node":"wallet-no-exceptions-caught","truth_value":"IN","reason":"premise"},{"node":"none-return-collapses-distinct-failure-modes","truth_value":"IN","reason":"SL justification valid","antecedents":["s3-get-returns-none-for-missing","maps-no-exceptions-none-returns"],"label":"S3 returns None matching HTTP 404 semantics; maps returns None for missing nodes, unreachable targets, and unknown geocodes — both APIs eliminate the need for exception handling but prevent callers from distinguishing \"not found\" from \"error computing result\""},{"node":"s3-get-returns-none-for-missing","truth_value":"IN","reason":"premise"},{"node":"maps-no-exceptions-none-returns","truth_value":"IN","reason":"premise"},{"node":"eviction-timing-has-no-codebase-convention","truth_value":"IN","reason":"SL justification valid","antecedents":["dmq-retention-trimmed-on-publish","fixed-window-single-key-gc","url-shortener-expiration-lazy","dedup-pruning-uses-2x-lateness"],"label":"Four different eviction triggers (write-time, access-time, read-time, watermark-time) with no shared pattern — a notable absence of convention in a codebase that otherwise favors them"},{"node":"dmq-retention-trimmed-on-publish","truth_value":"IN","reason":"premise"},{"node":"fixed-window-single-key-gc","truth_value":"IN","reason":"premise"},{"node":"url-shortener-expiration-lazy","truth_value":"IN","reason":"premise"},{"node":"dedup-pruning-uses-2x-lateness","truth_value":"IN","reason":"premise"}]}}