How to prevent hanging chrome-headless-shell processes eating a lot of CPU / battery?

[borekb]

I'm using agent-browser with Claude Code and it works great but sometimes I kill the session without realizing that the agent didn't have a chance to close it via agent-browser close (or the agent can make a mistake by not calling this command).

When this happens, chrome-headless-shell processes remain running indefinitely and sometimes consume a lot of CPU / battery without me realizing it.

For example:

$ ps aux | grep chrome-headless
USER    PID    %CPU  %MEM  ELAPSED   COMMAND
borekb  44028    0.0  0.2  19:54:59  chrome-headless-shell (main)
borekb  44054    0.0  0.1  19:54:59  chrome-headless-shell (network)
borekb  44055    6.8  0.5  19:54:59  chrome-headless-shell (renderer)
borekb  92158  519.2  0.8  01:43:06  chrome-headless-shell (gpu-process)

Is there a way to deal with this, like a global timeout for new sessions that are left hanging? Claude Code suggested I add a SessionEnd hook but I wanted to ask wheter there's a better way to handle this.

Thanks for an awesome tool BTW!

---

UPDATE: This is the SessionEnd hook that Claude suggested:

.claude/settings.json:

{
  "hooks": {
    "SessionEnd": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "agent-browser close 2>/dev/null || true"
          }
        ]
      }
    ]
  }
}

[rmemoria]

+1

The hook seems more like a workaround.