# jellyflow-core
`jellyflow-core` contains the portable graph document model for Jellyflow:
- stable graph, node, port, edge, symbol, group, and sticky-note IDs;
- serializable node graph data structures;
- first-class binding records for graph-local objects and opaque host-owned source anchors;
- type descriptors and compatibility checks;
- interaction-policy value types;
- undoable graph operations, transactions, fragments, and history.
The crate is headless by contract. It must not depend on Fret, GPU, renderer, platform, or windowing
crates.
```rust
use jellyflow_core::{Graph, GraphId, NodeId};
let graph = Graph::new(GraphId::new());
let node_id = NodeId::new();
assert!(!graph.nodes.contains_key(&node_id));
```
Bindings are portable document data. Jellyflow validates graph-local binding targets such as nodes,
ports, edges, groups, and sticky notes, while source anchors keep host-owned payloads opaque so
adapters can store PDF coordinates, text ranges, image regions, or annotation identifiers without
pulling source parsers into `jellyflow-core`.