cerebellum — fast cross-platform operation dispatcher

A single skill that wraps battle-tested canonical sequences for common app patterns. Single LLM round-trip in, one syscall sequence out. Designed to eliminate the LLM-tax on "obvious" multi-step operations. Per-OS backends:

• macOS — AppleScript / osascript / shell
• Linux — shell + POSIX tools (xdg-open, gtk-launch, gsettings, pactl, …)
• Windows — bash → powershell.exe (Move-Item, AppActivate, WMI, UIA, …)

When to use

For ANY of these patterns, prefer cerebellum over raw shell + multi-step:

• File ops (rename, move, copy, zip, mkdir, trash)
• Finder view/sort/sidebar settings
• Notes CRUD (create, append, delete, pin, format, export)
• Mail draft creation
• Tag operations

Architecture

LLM (cerebrum)         cerebellum               OS
──────────────         ──────────               ──
"rename old.txt
 to new.txt"     ───►  parse intent       ───►  mv old.txt new.txt
                       run canonical      ◄───  return ok
                       (handles retries,
                        iCloud sync waits,
                        kHasCustomIcon flag,
                        etc — all without
                        bothering the LLM)
                                          ◄───  ok
                 ◄───  "done"

Internal verify, retry, and platform quirks are baked in — the LLM doesn't need to know that macOS 14+ removed the AppleScript pinned property, or that Notes' table requires Cmd+Opt+T after AXFocus, or that Mail draft saving needs tell app Mail to launch + sleep. All of that lives in the cerebellum.