deck-generator assembles a deck from the template's named layouts and fills placeholders; fonts, sizes, and colours all inherit from the master, so output stays on-brand without anyone checking.

you keep the generated deck untouched as the original and correct a copy in PowerPoint — fonts, sizes, spacing, layout swaps, whatever you'd normally fix.

style-extractor diffs original vs edited, resolving inheritance so only real changes surface, and accumulates them into a confidence-weighted ledger that promotes a rule once it recurs across three decks.

a recurring correction is a defect in the template, not a per-deck fix — promoted rules route back into the master or the generator, so the loop converges and you correct less over time.