Better Planning · Build (build-time execution companion)

Authorship erosion is the other quiet failure of agentic coding. sync defends the design of record as code lands; this skill defends the human's authorship as code is written. Handed to an unattended loop, execution grinds tasks and lands large green PRs — and a simple idea becomes a complex artifact the human never shaped, decision by invisible decision. It is worst on greenfield, where the system is complex before the human ever runs it. This skill is the counter-loop: it runs a slice of planned work as a small mob with the human as the Architect making the calls that matter, agents doing the typing, and complexity fought in real time — so the human stays the creator, not the rubber stamp.

The family's second build-time companion, beside sync. They pair: this skill executes a slice; sync reconciles it at the milestone boundary. (comprehend is the third leg — the on-demand catch-up for a human who's lost the thread.)