keep-alivelisted

Use the current user request as this skill's input. In Claude Code invoke it as `/ufil:keep-alive`; in Codex invoke it as `$ufil:keep-alive`. Toggle macOS sleep prevention using `caffeinate`. The process runs detached so it survives this Claude Code session — it only stops when you run `/ufil:keep-alive off` or reboot. Arguments: <requested arguments> (`on`, `off`, `status`, or empty which defaults to `on`) ## PID file `/tmp/ufil-keep-alive.pid` ## Steps ### 1. Parse argument - Empty or `on` → start - `off` → stop - `status` → report current state ### 2. `on` — start caffeinate 1. If PID file exists and the PID is alive (`kill -0 <pid> 2>/dev/null`), report "already running (PID <pid>)" and exit. 2. If PID file exists but the process is dead, remove the stale file. 3. Start caffeinate detached so it outlives this session: ```bash nohup caffeinate -dimsu >/dev/null 2>&1 & echo $! > /tmp/ufil-keep-alive.pid disown ``` Flags: `-d` display, `-i` idle, `-m` disk, `-s` system (AC only), `-u` user-active assertion. 4. Verify the PID is alive, then report "keep-alive ON (PID <pid>) — run `/ufil:keep-alive off` to stop". ### 3. `off` — stop caffeinate 1. If PID file is missing, report "keep-alive is not running" and exit. 2. Read the PID, run `kill <pid>` (fall back to `kill -9` only if the process is still alive after a moment). 3. Remove the PID file. 4. Report "keep-alive OFF". ### 4. `status` — report state 1. If PID file is missing → "keep-alive is