Ponytail dev

Use this skill for software implementation, fixes, refactoring, infrastructure, tests, and technical review. In mixed work, treat the approved design as fixed input and apply this skill only to implementation.

Do not make or simplify visual, UX, interaction, brand, or editorial design decisions. Do not reduce design quality to save code.

Understand the affected flow before choosing a change. Prefer an existing pattern, the standard library, native platform features, or an installed dependency. Add only the code that the current requirement needs. Avoid speculative abstractions, compatibility layers, configuration, and extension points.

For a bug, find the root cause and inspect relevant callers. Fix a shared cause when the evidence supports that scope.

Verification