Implement a write-ahead log (WAL) key-value store that persists data to disk and supports crash recovery…

Implement a write-ahead log (WAL) key-value store that persists data to disk and supports crash recovery…: a task in TermGrade Environments: 1,004 executable Linux tasks (Harbor dataset). The program reads lines from stdin until EOF. Each line is a JSON object with a "cmd" field, followed by…

The task

The program reads lines from stdin until EOF. Each line is a JSON object with a `"cmd"` field, followed by command-specific arguments. Valid commands:

Part of ai-and/termgrade-environments.