Port 7899 is used by claude-intercom's broker on dev machines (it's the convention for that tool). claudemesh is a distinct product and should have its own default port. 7900 is unreserved and unconflicted. Prod deploys override via BROKER_PORT env var, so this only affects local dev ergonomics. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>