`pyssg.core.types`

Foundational data-plane types.

Stdlib only. These are the vocabulary shared by every other core module: stable logical identity (NodeId), per-aspect hashing keys (Aspect/Digest), the fixed phase ladder (Phase), and the node/edge kind enumerations.

`class Phase(IntEnum)`

Node lifecycle phases.

Order is the re-entry depth: a smaller value is deeper and therefore more expensive to recompute. A change marks a node dirty-from(P); results up to P - 1 stay valid and work restarts at P.

`class NodeKind(Enum)`

Kind of graph node.

`class ConnectionKind(Enum)`

Kind of resolved relation between nodes.

`class SourceSpan`

Half-inclusive source location for a parsed construct.