Separate slides with a line containing only ---. Blank lines split paragraphs. Lines starting with # become the serif headline on editorial templates (rendered bold on native templates). Inline **bold** and *italic* work mid-sentence. Everything below a line starting with === is ignored — keep the post caption there. On the last slide, a line of only +++ marks a Meta-only CTA block: it shows on the Instagram/Meta slides but is stripped from the TikTok and YouTube sets, so the slide ends on the line above it there. With auto-split on, paragraphs that don't fit flow onto new slides automatically.
The caption never appears on a slide. It rides along in the downloaded zip as <hook>-caption.txt, so when you post in a few days everything's in one place. Pasting a full script that includes a === block auto-fills this if it's still empty. The zip also carries <hook>-linkedin.txt and <hook>-substack.txt: the slide copy flowed into one post, with the CTA line (comment / follow) left off — that's just for the carousel. The LinkedIn file puts an invisible character on each blank line so the paragraph spacing survives LinkedIn's editor; the Substack file uses plain paragraph breaks, since Substack keeps them on its own. The zip also carries <hook>-script.txt — the raw editable script; to re-edit this carousel later, paste that file straight back into the Slides box above.
Readability is Flesch reading-ease — higher is easier; aim 70+ for Instagram (roughly 7th-grade reading level). Click a slide chip to jump to it. The risk list is a judgment-call heuristic — Meta doesn't publish its filters — so treat flags as prompts, not verdicts. Proofread flags egregious spelling/grammar (doubled words, spacing, lowercase "i", common typos) across all slides and the caption — also prompts, not a full spellcheck.