Break the @alkdev/taskgraph architecture specs into dependency-ordered implementation tasks across 8 component directories: setup, schema, error, graph, analysis, cost-benefit, frontmatter, api, and review. Each task has clear acceptance criteria referencing specific architecture docs. Three review tasks serve as quality gates at critical junction points (schemas-and-errors, graph-complete, complete-library). The dependency graph is validated acyclic with 9 topological levels enabling significant parallelism across independent work streams.
39 lines
1.6 KiB
Markdown
39 lines
1.6 KiB
Markdown
---
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id: schema/input-schemas
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name: Define TaskInput, DependencyEdge, and Nullable helper
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status: pending
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depends_on:
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- schema/enums
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scope: narrow
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risk: low
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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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Define the `TaskInput` and `DependencyEdge` input schemas in `src/schema/task.ts`, plus the `Nullable` generic helper. `TaskInput` uses `Type.Optional(Nullable(...))` for categorical fields to support both absent and explicitly-null values (YAML frontmatter distinction).
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## Acceptance Criteria
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- [ ] `src/schema/task.ts` exports `Nullable` helper: `const Nullable = <T extends TSchema>(T: T) => Type.Union([T, Type.Null()])`
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- [ ] `TaskInput` schema defined with all fields per [schemas.md](../../../docs/architecture/schemas.md):
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- `id: Type.String()`, `name: Type.String()`, `dependsOn: Type.Array(Type.String())`
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- Categorical fields: `Type.Optional(Nullable(TaskXxxEnum))` for status, scope, risk, impact, level, priority
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- Metadata fields: `tags`, `assignee`, `due`, `created`, `modified`
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- [ ] `DependencyEdge` schema: `from: Type.String()`, `to: Type.String()`, `qualityRetention: Type.Optional(Type.Number({ default: 0.9 }))`
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- [ ] Type aliases derived: `type TaskInput = Static<typeof TaskInput>`, `type DependencyEdge = Static<typeof DependencyEdge>`
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- [ ] Re-exported from `src/schema/index.ts`
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## References
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- docs/architecture/schemas.md — TaskInput, DependencyEdge, Nullable definitions
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- docs/research/typebox-patterns.md — section 6 (Nullable helper pattern)
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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 |