Give your agent
a persona.
PERSONA.md makes an AI agent read, speak, and act as a persona. Put a persona on your agent so it speaks in your voice, or give each role its own persona when you want them to work as a crew.
How to use it
Pick a persona, copy Apply, and paste it into ChatGPT, Claude, or Cursor. That agent reads PERSONA.md and works as the persona.
01
Pick
Choose a persona you like from the list.
02
Read
Who they are, how they speak, what they prioritize, and what they refuse — that is what the agent reads.
03
Put it on your agent
Copy Apply into the AI you use. Sign in only if you want to save it for later.
Which persona when
Giving one agent a voice is different from giving each role its own persona.
01
Your voice
When you want to put a persona on your agent so it speaks in your voice.
02
Group personas
When you want each role to have its own persona and work on its own part.
Mood words are not enough
“Be friendly” barely changes an agent. Spell out who they are, what wins when goals conflict, how they talk, and where they refuse—then they sound like the persona.
What goes in the guide
01
Who
A short intro to this voice. Not a legal identity claim.
02
Intent
The job this voice takes on when it speaks.
03
Speech
Length, distance, and habits you can hear — rules you can check by listening.
04
Priorities
When goals collide, what comes first — in order.
05
Samples
Lines that already sound like them. Real examples beat adjectives.
06
Refusals
Hard lines they will not cross. Soft preferences stay in speech habits.
Keep these in mind
Put examples and habits you can actually hear.
Do not fill the file with tone adjectives or MBTI alone.
Order the values that win when goals collide.
Do not split the guide into many files. One PERSONA.md is enough.