`pyssg`

pyssg - incremental static site generator.

Architecture: three separated planes.

Data plane: a single dependency graph of Node + Connection.
Control plane: hooks scoped to Builder (long-lived) and Build (per build).
Plugins: composition roots that only declare facts; the engine owns the incremental/cache/scheduling algorithms.

Hard boundary: pyssg.core imports stdlib only; every third-party dependency lives in a peripheral adapter (built-in plugin or pyssg.watch). This boundary is enforced by an automated test.