Legacy Banking Infrastructure Support Skill helps banks, fintech vendors, enterprise IT support teams, SRE teams, operations managers, and legacy-system consultants turn scattered operational knowledge into structured support runbooks. It creates incident classification workflows, dependency maps, log review checklists, escalation paths, rollback and rerun decision guidance, workaround assessments, data integrity checks, post-incident review templates, support readiness audits, knowledge-base articles, and recurring ticket pattern analyses for core banking, payments, cards, ATM, settlement, reconciliation, online banking, batch processing, middleware, file transfer, database, vendor, and regulatory reporting environments. The skill is designed to preserve institutional knowledge, reduce support workload, improve incident response consistency, and produce audit-ready support documentation without executing production actions.