Repeatability
Medium
The mechanical steps — converting to ES6 modules, adding JSDoc, writing Jest tests — are structurally consistent. However, each codebase has unique logic quirks (discount stacking rules, tax edge cases) that require reading and interpreting the existing code rather than following a fixed template.
Ambiguity Tolerance
Medium
Success criteria are mostly crisp: ES6 imports, JSDoc on all functions, 15+ passing Jest tests covering named edge cases. The ambiguity lies in module boundary design and what counts as 'testable' — judgment calls the agent will make without explicit guidance.
Data & Tool Availability
High
The agent needs only the 8 source files and a Node/Jest environment — both are straightforwardly providable. No external APIs, live data, or special credentials are required, making this a clean execution environment.
Error Cost
Medium
Incorrect refactoring could introduce subtle bugs in cart calculations — a real business risk for an e-commerce system. However, the deliverable is code under human review before deployment, and the Jest test suite itself acts as a safety net, making errors detectable and reversible before they reach production.
Human Judgment Required
Medium
Architectural decisions about module granularity and naming conventions benefit from knowing the team's conventions and future roadmap. A human should review the output, but the agent can produce a solid first draft without that context.