Explain, operate, and troubleshoot `pkf`, the pure-MoonBit CLI for the pkfire typed task runner, and author or maintain its `Taskfile.pkl` files. Use when a user asks what pkf is, wants to inspect or run a task graph, add cached tasks or services, model affected-file workflows, migrate from just/Make/Taskfile.yml, diagnose Pkl package or cache behavior, or change pkfire itself. This skill distinguishes the current MoonBit implementation from stale Go-era documentation and records the exact schema, action-key, service, and CLI contracts.
2026-07-14