#library

How to split reusable code out of a game into an s&box Library package, and how to consume one from a game, without silently losing content, binding the wrong types, or shipping divergent assets.

Code under Code/ hotloads fine, but an Assets/ folder created AFTER the editor started never mounts: asset search finds nothing in it and asset_info reports no asset. It is not a dead watcher; the only fix is restarting the editor.

The editor discovers a library under Libraries/ only if the folder contains exactly one .sbproj file. A hand-vendored library without one is silently ignored, producing a wall of CS0246 errors on every type it defines.

A library extraction seam covers only the headline behavior: every other side effect of the replaced code path silently disappears unless explicitly reproduced on the consumer side.

A library host project fails to compile a library-mounted .scene asset: the resource compiler probes a mangled path, and the scene silently becomes an empty impostor.

A consumer game plus a vendored library can be compile-gated fully offline using two scratch csprojs against the editor install's prebuilt base library DLL.