sgs.mjs is built (src/build.mjs) from wmzy/sanguosha, https://github.com/wmzy/sanguosha, commit
8f4b693b654a6365d143a80003877219f6e08b22: its rules engine, headless client move lists, heuristic AI and replay
recorder, with this project's src/table.ts, play.ts, room.ts and bots.ts. generals.json is generated from it.
Also bundled, under the MIT licence: eventsource (Copyright (c) EventSource GitHub organisation) and
eventsource-parser (Copyright (c) 2026 Espen Hovlandsdal), which the upstream's headless client imports; they are never
used here (no network).

The upstream's licence:

MIT License

Copyright (c) 2025 三国杀项目作者

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.