{"id":"combiner-does-not-affect-map-output-stats","text":"`map_output_records` is incremented before the combiner runs (line 108), so stats reflect pre-combiner volume; the test at line 68 asserts this explicitly","truth_value":"IN","source":"entries/2026/05/29/topic-combiner-correctness.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"combiner-does-not-affect-map-output-stats","truth_value":"IN","reason":"premise"}]}}