Repeatability
High
Rails migration structure is highly formulaic — reversible migrations, ActiveRecord model methods, and RSpec/Minitest patterns are well-established conventions AI has seen thousands of times. The structural scaffolding is nearly identical every time.
Ambiguity Tolerance
Medium
The migration structure and validation tests have crisp success criteria, but the name-splitting logic for edge cases (suffixes like 'Jr.', single-word names, hyphenated names, cultural variations) involves judgment calls with no single correct answer. The task acknowledges this but doesn't specify how to resolve it.
Data & Tool Availability
Medium
The agent can write the code without needing live database access, but it cannot inspect the actual distribution of name formats in the 45,000 records — which would meaningfully inform how to handle edge cases and what test fixtures to prioritize.
Error Cost
Medium
A reversible migration limits catastrophic risk, and the task explicitly asks for one. However, a flawed name-splitting algorithm silently corrupting 45,000 customer records before anyone notices is a real operational risk — especially if the rollback path isn't tested.
Human Judgment Required
Medium
The name-parsing heuristic requires cultural and linguistic judgment that AI handles imperfectly — 'Van Morrison', 'Mary Jo Smith', 'Robert Downey Jr.' all break naive split-on-space logic. A human should validate the edge-case handling strategy before production use.