`pyssg.plugins.asset_copy`

Asset-copy plugin.

Copies the active layout's assets/ directory into the build output under /assets/..., preserving the directory structure. A file is (re)written only when it is missing from the output or its bytes differ from the source, so rebuilds stay cheap and the output is byte-identical to a full rebuild.

The copy is keyed on evaluate_collections because that hook fires once per finalize and the layout's assets_dir is the only input -- the copy is a deterministic function of the source bytes (no clock, no globals). It never deletes files it did not place, so user/output files are left untouched.

`copy_assets(build: Build) -> None`

Mirror the layout assets/ tree into the output assets/ tree.

`class AssetCopyPlugin`

Built-in copier for the layout's static assets.

`AssetCopyPlugin.apply(self, builder: Builder) -> None`

`asset_copy() -> AssetCopyPlugin`

Factory used in pyssg.config.py.