Name: Mem Watchdog Ops
Author: chf3198

Mem Watchdog Ops Skill

Use this skill when working in constrained Crostini environments where VS Code, Chrome/Playwright, and extension host memory spikes can trigger OOM.

Ground Rules

Never read or reason from SwapFree values on Crostini.
Prefer systemctl --user only — never sudo systemctl.
Treat the mem-watchdog daemon as independent runtime authority.
For tuning, use extension settings (memWatchdog.*) so the extension writes config and restarts service safely.

Status snapshot
- Use chat participant command: /memwatchdog status
- Or run helper: ~/.copilot/skills/mem-watchdog-ops/watchdog-snapshot.sh
Recent actions / diagnosis
- /memwatchdog logs

Use this skill when working in constrained Crostini environments where VS Code, Chrome/Playwright, and extension host memory spikes can trigger OOM.

Never read or reason from SwapFree values on Crostini.
Prefer systemctl --user only — never sudo systemctl.
Treat the mem-watchdog daemon as independent runtime authority.
For tuning, use extension settings (memWatchdog.*) so the extension writes config and restarts service safely.

Status snapshot
- Use chat participant command: /memwatchdog status
- Or run helper: ~/.copilot/skills/mem-watchdog-ops/watchdog-snapshot.sh
Recent actions / diagnosis
- /memwatchdog logs

Condition	Action
`MemAvailable ≤ 15%`	SIGKILL Chrome/Playwright
`MemAvailable ≤ 25%`	SIGTERM Chrome/Playwright (deferred if Playwright active)
PSI full avg10 > 25%	SIGTERM Chrome (deferred if Playwright active)
VS Code RSS ≥ 3.8 GB	SIGKILL Chrome (always — even during Playwright sessions); if none → kill_vscode_main()
VS Code RSS ≥ 3.4 GB	SIGTERM Chrome (deferred if Playwright active); if none → kill helper (Shared Process, File Watcher, Network Service); if none → cgroup throttle/reclaim
RSS velocity spike	Kill lowest-value helper — never a language server or Extension Host at normal severity
Chrome PIDs > 3	SIGKILL oldest excess (skipped when Playwright is active)