40 lines
1.6 KiB
Markdown
40 lines
1.6 KiB
Markdown
---
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id: graph/construction-json
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name: Implement fromJSON and export/toJSON serialization for FlowGraph
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status: completed
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depends_on:
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- graph/flowgraph-class
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- schema/graph-schemas
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scope: narrow
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risk: medium
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impact: component
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level: implementation
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---
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## Description
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Implement the serialization boundary: `FlowGraph.fromJSON()` for deserialization and `export()`/`toJSON()`/`toString()` for serialization. The round-trip `fromSpecs() → export() → fromJSON()` must be lossless.
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## Acceptance Criteria
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- [ ] `FlowGraph.fromJSON(data: FlowGraphSerialized): FlowGraph` — validates input against schema using `Value.Check()`, throws `InvalidInputError` (with `errors` array) on validation failure
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- [ ] `fromJSON()` validates DAG invariants after deserialization — runs cycle detection, throws `CycleError` if cycles found (per ADR-002, even externally-provided data cannot produce cyclic graphs)
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- [ ] `export(): FlowGraphSerialized` — returns graphology native JSON format
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- [ ] `toJSON(): FlowGraphSerialized` — alias for export()
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- [ ] `toString(): string` — `JSON.stringify(export())`
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- [ ] Round-trip guarantee: `fromSpecs() → export() → fromJSON()` is lossless
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- [ ] Round-trip guarantee: `fromCallEvents() → export() → fromJSON()` is lossless
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- [ ] Unit tests: valid round-trips, invalid input throws InvalidInputError, cyclic input throws CycleError, empty graph round-trip
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## References
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- docs/architecture/flowgraph-api.md — fromJSON, export, toJSON, toString signatures
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- docs/architecture/schema.md — SerializedGraph factory, FlowGraphSerialized variants
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## Notes
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> To be filled by implementation agent
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## Summary
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> To be filled on completion |