CLI Command

Use this skill for CLI command design and implementation.

Read the relevant reference:

• references/design.md for command surface, output, errors, interactivity, configuration, and exit codes.
• references/implementation.md for Effect command wiring and service patterns.
• references/client-cache-sync.md when touching toolkit client services.
• references/command-example.md for the repo-linked authoring recipe, behavioral checks, and an unseen-task evaluation protocol.
• references/data-and-lifecycle.md for TerminalUI, stdin/stdout contracts, streaming commands, terminal controls, and recovery pitfalls.