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/analysis-template-validation.md

@@ -0,0 +1,39 @@
+---
+id: analysis/template-validation
+name: Implement validateTemplate and validatePreconditions
+status: pending
+depends_on:
+  - analysis/type-compat
+  - graph/queries
+  - schema/edge-attrs
+scope: moderate
+risk: medium
+impact: component
+level: implementation
+---
+
+## Description
+
+Implement the template validation functions that check workflow templates against operation graphs, and the precondition validation that verifies all required inputs are provided by predecessors.
+
+## Acceptance Criteria
+
+- [ ] `validatePreconditions(graph: FlowGraph<OperationNodeAttrs, OperationEdgeAttrs>): ValidationError[]` — for each node, checks input required fields are provided by predecessor outputs; returns `ValidationError[]`
+- [ ] `validateTemplate(template: UNode, operationGraph: FlowGraph<OperationNodeAttrs, OperationEdgeAttrs>): AnyValidationError[]` — validates template against operation graph
+- [ ] Template validation checks: (1) all Operation names exist in registry/graph, (2) no cycles in rendered DAG, (3) type compatibility between sequential operations, (4) reachability from start, (5) no orphan nodes
+- [ ] Template validation is advisory — returns warnings AND errors, never throws
+- [ ] Both functions follow the "collect all errors" pattern
+- [ ] Unit tests: valid template returns empty, missing operation, cycle in template, type incompatibility, unreachable nodes, orphan nodes
+
+## References
+
+- docs/architecture/analysis.md — validatePreconditions, validateTemplate specifications
+- docs/architecture/workflow-templates.md — validation checks
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion