subsystem_coupling

tech.tresbien/drupal-code-query · Verify this server

Answer "what else tends to fail when a merge request touches this core subsystem" from CI history over ~9,000 core MRs; with issue_nid, "which subsystems does this issue touch and what co-fails with them". No arguments: the directory of subsystem names (shared by core_symbol.subsystem and list_symbol_users subsystem=). - subsystem resolves a name (Views, case-insensitive) or a bucket (module:views, core_lib:Entity); unknown → refused with the nearest names. - Edge: touched_bucket → failing_bucket (+ subsystem), lift, co_fail_count, touched_count, failed_count, total_mrs; lift = P(fail | touched) − P(fail | any MR). Self edges left out. - Floors min_lift (0.05) and min_co_fail (3) drop noise; count = edges above them, edges ≤ limit (≤ 50) by lift. When nothing clears the floors the strongest edges are listed with a note. - issue_nid: touched_subsystems first; a note explains an issue with no MR file data.