Diagnose tldr's runtime state — daemon health, Salsa cache counters, on-disk cache size, token-savings telemetry, and environment checks. Reach for this when tldr feels slow, when checking whether the daemon is running, or when inspecting cache health. If the daemon is missing, prefer `tldr init` for project bring-up or use `tldr daemon start -p "$(pwd)"` for a session. Triggers on "is the daemon running", "why is tldr slow", "check tldr cache", "tldr stats", "tldr doctor".
