Guides · all free

Personality tuning, agent by agent.

Practical walkthroughs for installing a personality tuning wherever you talk to an AI — ChatGPT's custom instructions, Claude's styles and projects, and the instruction files your coding agents read. Start with the pillar guide if you're new; jump straight to your agent if you're not.

Start here
Pillar
How to give your AI a personality.
The method: test → tuning → install · read →
 Research
What personality type is ChatGPT?
Answered with 2,200 test runs · read →
By agent
ChatGPT
Custom instructions for all 16 MBTI types.
Paste-ready blocks, under the 1,500-char limit · read →
 ChatGPT
Make ChatGPT sound like you.
Personality-first vs corpus-first, honestly · read →
 Claude
Give Claude a personality.
Styles vs Projects vs paste vs CLAUDE.md · read →
 Claude Code
CLAUDE.md examples that actually work.
Four annotated files + the principles · read →
 Coding agents
The personality layer your AGENTS.md is missing.
CLAUDE.md, Cursor rules, Copilot instructions · read →
By system
Enneagram
Enneagram AI prompts for all 9 types.
Motivation-first tuning blocks · read →
 Comparison
MBTI vs Big Five, for AI purposes.
The only comparison backed by cross-model data · read →
Free tools
Tool
Custom instructions generator.
Your type + your agent → paste-ready block · open →
 Tool
CLAUDE.md generator.
Three questions → a working starter file · open →
MIT · bernardjhuang/agenttune Privacy · Terms