Plan Feature — From Issue (internal)

Convert a feature-request issue into the project's planning artifacts, keeping a clean issue → SPEC → PR(Closes #n) trace. Writes the SPEC's product half (same two-halves convention design-feature uses) and must satisfy capability closure before handing off — a thin issue does not get a shortcut around it.

This skill stops at the Product half. It designs, then the unit goes to review-spec for an independent Product review; engineering planning is a different authority's turn. Composing plan-feature-scaffold in the same breath as the design it just wrote is the bypass this separation exists to close — the author of a Product half cannot be the one who decides it is ready to build on.

When to use

• The plan-feature router calls this when the input is a GitHub issue (or --from-issue N) that describes new product capability.