{"id":"metrics-tag-matching-is-subset","text":"`_matching_keys` performs subset matching: a query with `tags_filter={\"a\": 1}` matches any series whose tags include `a=1`, regardless of additional tags present","truth_value":"IN","source":"entries/2026/06/05/metrics-monitoring-and-alerting-metrics.md","source_url":"","source_hash":"","justifications":[],"dependents":["metrics-indexing-separates-write-key-from-read-matching"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"metrics-tag-matching-is-subset","truth_value":"IN","reason":"premise"}]}}