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Garry TanandClaude Fable 5
5f6266e012
The terminal agent is intentionally detached so it survives the short-lived CLI launcher, but its real owner is the persistent browse server. If that server crashed or was killed before running normal shutdown, the agent was adopted by PID 1 and lived forever (#2019). spawnTerminalAgent now requires an ownerPid and exports it to the agent as BROWSE_OWNER_PID; all three spawn sites pass the server PID (cli.ts cold-start, cli.ts supervisor respawn, server.ts watchdog). The agent polls the owner with signal 0 every 15s (GSTACK_TERMINAL_OWNER_WATCHDOG_MS to tune) on an unref'd timer and, when the owner disappears, exits through the SAME cleanup path as an intentional SIGTERM shutdown — now re-entrancy-guarded and also removing the terminal-internal-token file alongside the port file and agent record. Runtime test spawns a real agent tied to a throwaway owner process, kills the owner, and asserts the agent exits and its discovery files (terminal-agent-pid, terminal-port) are gone. Reconciled with the watchdog commit's spawnTerminalAgent contract test (process-liveness-windows.test.ts now passes ownerPid and pins the BROWSE_OWNER_PID env forwarding). Closes #2019. Contributed by @csarigoz (PR #2530). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>