nethercore-development

Core development workflow for Nethercore games. Triggers on "nether build", "nether.toml", "asset handles", "determinism", "rollback rules", "WASM game". **Load references when:** - Full nether.toml examples -> `references/nether-toml.md` - CLI command details -> `references/cli-commands.md` - Determinism patterns -> `references/determinism-rules.md`