Transform the flowchart system from "compute everything upfront" to
"walk IS the computation". This is the foundation for the new unified
computation model.
Phase 1 - Schema & Core Runtime:
- Add TransformExpression, StateSnapshot, DisplayTemplate, AnswerDefinition
- Add StructuredTestCase for primitive-based test validation
- Update FlowchartState with values, snapshots, hasError fields
- Mark variables as deprecated (optional) for transition period
- Add interpolateTemplate() for {{name}} and {{=expr}} syntax
- Add applyTransforms(), extractAnswer(), simulateWalk() to loader
- Add createContextFromValues() for transform execution
Phase 2 - Walker Integration:
- Apply transforms when entering each node during walk
- Initialize entry node transforms on state creation
- Snapshots now accumulate as nodes are visited
All existing flowcharts continue to work via backwards compatibility
with the legacy variables section.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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