decompose architecture into 38 atomic tasks across 12 parallel generations

Decompose the reviewed architecture specs into taskgraph-managed tasks:
- 2 setup tasks (project init, test infrastructure)
- 4 schema tasks (enums, node attrs, edge attrs, graph schemas)
- 1 error hierarchy task
- 6 graph tasks (FlowGraph class, 3 construction paths, queries, validation)
- 5 analysis tasks (type-compat, build-type-edges, ordering, template-validation, defaults)
- 5 component tasks (Operation, Sequential, Parallel, Conditional, Map)
- 2 host config tasks (GraphologyHostConfig, ReactiveHostConfig)
- 4 reactive tasks (WorkflowRoot, node-status, max-concurrency, retry-semantics)
- 3 review tasks (foundation, reactive-and-hosts, complete-library)
- 5 meta cluster tasks (schema, graph, component, reactive, analysis layers)
- 1 API exports task

Validated with taskgraph: zero cycles, 38 tasks, 12 parallel generations.
Critical path: 12 tasks through reactive execution layer.

tasks/schema-edge-attrs.md

@@ -0,0 +1,43 @@
+---
+id: schema/edge-attrs
+name: Define edge attribute schemas (Operation, Triggered, Dependency, Template) and CallResult
+status: pending
+depends_on:
+  - schema/enums
+  - schema/node-attrs
+scope: narrow
+risk: low
+impact: component
+level: implementation
+---
+
+## Description
+
+Define all edge attribute schemas and the CallResult schema. Edge schemas are mode-specific (they do NOT include the universal `edgeType` field — that's stored separately in graphology alongside the mode-specific attributes). TemplateNodeAttrs is a type alias for OperationNodeAttrs.
+
+## Acceptance Criteria
+
+- [ ] `src/schema/edge.ts` exports all edge schemas and types
+- [ ] `OperationEdgeAttrs`: `compatible` (boolean), optional `detail` (string), optional `mismatches` (Array of {path, expected, actual})
+- [ ] `TriggeredEdgeAttrs`: empty object `Type.Object({})`
+- [ ] `DependencyEdgeAttrs`: empty object `Type.Object({})`
+- [ ] `CallEdgeAttrs`: union type `TriggeredEdgeAttrs | DependencyEdgeAttrs` (discriminated by `edgeType` at runtime)
+- [ ] `TemplateEdgeAttrs`: `edgeType` (union of "sequential" | "conditional"), optional `condition` (Unknown), optional `negated` (boolean), optional `dataFlow` (boolean with default false)
+- [ ] `TemplateNodeAttrs`: type alias for `OperationNodeAttrs` (template nodes carry the same attributes as operation nodes)
+- [ ] `CallResultSchema`: `status` (NodeStatusEnum), `output` (Unknown), optional `error` ({code, message, details?})
+- [ ] `CallResult`: type alias via `Static<typeof CallResultSchema>`
+- [ ] `src/schema/index.ts` re-exports all edge schemas, CallResult, and TemplateNodeAttrs
+- [ ] Unit tests for each schema: valid/invalid shapes, optional fields
+
+## References
+
+- docs/architecture/schema.md — full edge attribute definitions, CallResultSchema, TemplateNodeAttrs, edge key conventions
+- docs/architecture/workflow-templates.md — TemplateEdgeAttrs.condition semantics (string vs function)
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion