Explores the diff-based approach (TypeBox Value.Diff → graphology mutation
mapping) as an alternative to rebuild-on-change. Key findings:
- The diff must happen at the graph level, not the source level, because
TaskInput.dependsOn doesn't directly map to edge mutations
- graphology's import(merge=true) handles merges but not deletions
- The real win is reactivity (fine-grained event notifications), not performance
- For <200 node graphs, rebuild is always sub-millisecond
- A hybrid approach (diff for attribute-only changes, rebuild for structural
changes) is possible but adds significant complexity
Decision: defer to v2. ADR-002 (rebuild) stands. The exploration is preserved
for future reference.
