Turns the edits you make to a generated deck into reusable style rules. It diffs the untouched original against your hand-edited copy, resolving each run's styling through the template master first — so re-stating an inherited value produces nothing and only your real changes surface. Changes accumulate in a confidence-weighted ledger; a preference that recurs across three decks is promoted and routed to where it should actually be fixed — usually the template, not a per-deck patch. It is the second half of the loop that begins with deck-generator.
Use when
After hand-correcting a generated deck — 'learn from my edits', 'note the style changes I made', or updating the deck style rules.
Structure
SKILL.md spine + 1 reference (the ledger format), with a diff script and the shared master resolver.
Discipline
Refuses without both files; the edited deck is ground truth; recurring fixes route to the source, not the loop.