How it works
What goes in and what comes out
You say what the post is about and add the facts, links or call to action it must include. An AI model (Llama 3.1 8B, run on Cloudflare Workers AI) writes three different Substack Notes in the tone, length and language (English or Vietnamese) you choose. Each draft has its own copy button, and "Write new drafts" asks again with the same brief.
The prompt describes how people write on Substack: A Substack Note: a thoughtful, personal short post that invites discussion. Plain prose, no hashtags.
Length
Substack sets no hard length for a Note that we could confirm, so the counter shows a plain character count.
Short, Medium and Long aim for about 100–250, 250–600 and 600–1,200 characters, within any limit.




