refactor-simplify

# Refactor Simplify ## Trigger Use when requested refactor is readability/DRY/removal of repeated abstraction. ## Inputs - Task/task set and green baseline test evidence. ## Outputs - Refactored code with no behavior regression. - Updated/added characterization tests if necessary. ## Procedure 1. Confirm baseline is green. 2. Identify duplicate abstractions, verbose wrappers, and repeated boilerplate. 3. Refactor only local scope. 4. Keep public behavior unchanged. ## Guardrails - No behavior change unless explicitly requested. - Preserve API/shape. ## Success criteria - Equivalent behavior verified by rerun of baseline suite. ## Prefer Superpowers - Use `refactor` patterns only and ask `writing-plans` only when scope is large. ## Avoid scope creep - Do not introduce new architecture in simplification pass.