Banking & replay pipeline

Learning objectives

• Separate banking-stage parallelism from ledger replay verification responsibilities.
• Follow one transaction from queue through banking to commitment vocabulary used in issues.
• Know which directories usually appear in bench/test failures you might fix in the contribution module.

Reading scaffold

Anchor to core/, ledger/, runtime/ as appropriate—refresh paths after reflect-changes.js solana-core. Previous: Local validator & tracing. Next: OSS contribution — guided issue.