{"id":"metrics-indexing-separates-write-key-from-read-matching","text":"Metrics separates write-path identity (frozen tag sets as immutable hash-safe keys) from read-path flexibility (subset matching enables partial-tag queries without key enumeration).","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["metrics-series-keyed-by-frozen-tags","metrics-tag-matching-is-subset"],"outlist":[],"label":"Frozen keys guarantee stable identity for storage while subset matching decouples query expressiveness from key structure"}],"dependents":["metrics-instantiates-write-read-cost-pattern","metrics-write-read-separation-is-structurally-complete"],"metadata":{"last_reviewed":"2026-06-06T06:26:57","review_result":"pass"},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"metrics-indexing-separates-write-key-from-read-matching","truth_value":"IN","reason":"SL justification valid","antecedents":["metrics-series-keyed-by-frozen-tags","metrics-tag-matching-is-subset"],"label":"Frozen keys guarantee stable identity for storage while subset matching decouples query expressiveness from key structure"},{"node":"metrics-series-keyed-by-frozen-tags","truth_value":"IN","reason":"premise"},{"node":"metrics-tag-matching-is-subset","truth_value":"IN","reason":"premise"}]}}