`gbrgames first-boot -game <id>` (or -image for a game with no template) starts the server once like the node-agent does (same volumes, user, SteamCMD install and startup prefix) but with none of the template's settings and no restart policy, in the isolated gbr-boottest network. It watches the console until the server exits, goes quiet or hits -max, stops it gracefully (many servers write their settings on shutdown) and records: - the console with timings, plus ready and error lines; the last strong ready line before the stop becomes a readyPattern / readyExample pair - every file created; config files are copied out and parsed into settings with their defaults (INI, properties, JSON, YAML, Unreal OptionSettings=(...) lists); log files are scanned for ready lines too - files written outside the volumes, which a recreated container loses Minecraft: ready line `Done \([0-9.]+s\)! For help, type "help"` and 76 settings (69 from server.properties) found with no template input. ARK: showed its image retries nothing when SteamCMD fails with "Missing configuration" and starts a server that was never installed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>