pastilhasandClaude Opus 5 f22c667502 vnc: reclaim the port before starting, and do not trust a listener we did not spawn
Closes the TODO item about orphaned/duplicated VNC servers across sidecar restarts. The diagnosis
there was correct and outlived the move off x11vnc, because the shape of the bug is in the lifecycle,
not the server: the running desktop lives in module state, a sidecar restart forgets it while the
process keeps running, and waitForPort accepted ANY listener on 5900 as proof of a healthy start.
The next start would then spawn a server that could not bind the port, see the ORPHAN listening, and
report success — leaving the platform convinced it had started a desktop the browser was not
looking at.

Two changes. reclaimPort frees the port before spawning: TERM whatever holds it, KILL after two
seconds. waitForPort now also fails when the process we spawned has exited, so a foreign listener
cannot be mistaken for our own.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-01 21:22:30 +00:00
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