glm-5.1
131e3e929b
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.
50 lines
2.0 KiB
Markdown
50 lines
2.0 KiB
Markdown
---
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id: cost-benefit/risk-analysis
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name: Implement riskPath, riskDistribution, and shouldDecomposeTask functions
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status: pending
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depends_on:
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- cost-benefit/ev-calculation
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- analysis/critical-path
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- schema/numeric-methods-and-defaults
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scope: moderate
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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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Implement the three risk analysis functions: `riskPath`, `riskDistribution`, and `shouldDecomposeTask`. These are standalone composable functions that serve different analysis use cases.
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## Acceptance Criteria
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- [ ] `riskPath(graph: TaskGraph): RiskPathResult`:
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- Calls `weightedCriticalPath` with weight function `riskWeight * impactWeight`
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- Returns `{ path: string[], totalRisk: number }`
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- `totalRisk` is the sum of weight values along the path
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- [ ] `riskDistribution(graph: TaskGraph): RiskDistributionResult`:
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- Groups all tasks by their `risk` attribute
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- Returns `{ trivial: string[], low: string[], medium: string[], high: string[], critical: string[], unspecified: string[] }`
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- Tasks with `risk: undefined` (not assessed) go in `unspecified`
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- No duplicate task IDs in any bucket
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- [ ] `shouldDecomposeTask(attrs: TaskGraphNodeAttributes): DecomposeResult`:
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- Pure function — takes node attributes (not a graph)
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- Internally calls `resolveDefaults` for `risk` and `scope` (nullable fields)
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- Flags decomposition when: risk >= "high" OR scope >= "broad"
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- Returns `{ shouldDecompose: boolean, reasons: string[] }`
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- Unassessed tasks (null/undefined risk or scope) are never flagged — default values are below threshold
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- Provides specific reasons: e.g., `"risk: high — failure probability 0.35"`, `"scope: broad — cost estimate 4.0"`
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- [ ] Unit tests for all three functions with known inputs/outputs
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## References
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- docs/architecture/api-surface.md — risk analysis functions
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- docs/architecture/cost-benefit.md — riskPath, riskDistribution, shouldDecomposeTask, decomposition threshold
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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 |