A style guide that's set up right can make Claude's writing sound like you — and not a robot.
Section One
Global
Universal rules for every chat. Best for small habits like "never open with Certainly!"
Best for Voice
Your main home. Loads automatically every time you open that project.
Samples
Upload 10–20 of your best posts. Claude uses these as "what good looks like."
Quick Sketch
A short summary of your voice. Toggle it on per chat as needed.
Section Two
In This Order
2–3 sentences on your role and what you write about.
5–7 rules written as commands. "Be direct. Vary sentence length."
3–5 real pairs: bad (AI writing) vs. how you'd actually say it.
Banned phrases and structures. Keep it to 15–25 items max.
"Does any sentence sound like a press release? Rewrite it."
Section Three
Let Claude Write It For You
Use Claude's built-in Skill Creator to auto-generate the style guide from your existing writing. No manual writing required — paste your best posts and let it extract the patterns.
Upload to Project Knowledge
Save the output as a .md file and drop it into your Claude Project. It loads automatically into every conversation in that project.
Section Four
Banned-word list longer than 25 items — Claude ignores the bottom half.
Over-formatting the guide — Claude mirrors your formatting back at you.
Guide over 3,000 words → diminishing returns kick in fast.
Writing it once and never updating it.
The Feedback Loop
Every 5 posts you publish, paste them back in and ask Claude what it learned about your voice. The guide is a living document, not a one-time write.