Develop Small Feature

Implement the feature or fix described below, carrying it through the full branch → TDD → static checks → user verification → commit → PR lifecycle.

This skill is scoped to small, well-scoped changes (a handful of files, a settled approach). For large or uncertain work — spanning many files, needing real debugging/trial-and-error, or warranting a deep review — use heavy-implementer and/or the code-review/simplify skills directly instead of forcing this flow.

Spec: $ARGUMENTS

If no spec is given as an argument, use the specification already established in this conversation (the user's most recent instructions, requirements already discussed, or an agreed-on OpenSpec change). Do not ask the user to repeat themselves if the spec is already clear from context; ask only if it is genuinely ambiguous.