Reported live: a fresh site's container failed to start with "address
already in use" on its assigned port. wordpress.sh scanned for a free
port by grepping `docker ps -a`'s port list — that only reflects ports
Docker itself currently has bound, so it's blind to ports held by
non-Docker processes or anything Docker isn't reporting cleanly at that
instant. Every other service in this repo scans with find_free_port
(checks actual OS-level listening sockets via ss) per CLAUDE.md's "Port
collision avoidance" section; wordpress.sh was the one holdout still using
its own weaker check. Switched to the shared helper, already available in
this file's own standalone stub and via lib/common.sh — no new dependency,
just using what was already sitting there unused.
Claude
abd1bcd35d