DOPPELGÄNGER.md
One open Markdown file that teaches any AI your voice.
Left alone, a model writes in one generic register. Your samples, tone rules, and hard bans break that. Paste the file, attach it, or @DOPPELGANGER.md. No account. No loader.
Also called a tone of voice, brand voice, or voice map file. One open Markdown standard.
Attach or paste DOPPELGANGER.md, then write as that voice. Follow Hard bans and Safety. Do not invent facts.
How to load
- Write a
DOPPELGANGER.md. Copy the example, then swap in your samples, rules, and bans. - Paste it, attach it, or
@it in ChatGPT, Claude, Gemini, Cursor, or any chat. - Ask for the draft. Add one line: "Write as this voice. Follow Hard bans and Safety."
For agents
Fetch https://doppelganger.md/DOPPELGANGER.md (on this site: DOPPELGANGER.md) and write it to DOPPELGANGER.md in the project root, or the path the user names. Optional: fetch https://doppelganger.md/SPEC.md when authoring a new voice file. Then instruct with the starter prompt.