A single plain-text file that carries your context into Claude, ChatGPT, Gemini — any AI you want. No sign-up, nothing to install, no strings. Your data stays on your device. Includes the free Agent Tuner — customize exactly how any AI works with you.
How it works
Use the builder on this site. It creates a plain-text file with your context and tone.
Paste your Carrierfile into any AI. Type unpack — it's loaded and calibrated to you.
Every session starts with the AI already knowing who you are and how you work.
Type pack up at the end. The AI writes back any updates. Save the file. Carry it next time.
A well-tuned AI helps with what it's good at, and then gets out of your way. The less you have to re-explain yourself, the sooner you can close the tab.
Why I Built Carrierfile
We don’t need more AI, we need better-tuned AI.
Most AI systems are trained to be helpful, engaging, and to hold your attention as long as possible. They’ll never tire, never push back, never tell you when they’re wrong — or when you are. Frictionless by design. A company decides how it talks to you, what it remembers about you, and when it stops (never). This is what I call an untuned AI.
Think of AI like a musical instrument or a radio station. We tune instruments to our ear and stations to our taste. The secret hidden in plain sight is that you can also tune an AI — for free, with nothing more than a plain text file.
Carrierfile is that file.
A well-tuned AI helps with what it’s good at, and then gets out of the way. The less you have to re-explain yourself, the sooner you can close the tab and get back to the work only you can do.
I’ve been writing about how I got here and where I think this is all going — a series called Agentic Acts of Care. Follow the story on Substack.
Read the essays →
Chat less. Carry your context.
The format is open, MIT licensed, and free forever. Build on it.
Built by
I built Carrierfile because I believe your context belongs to you — not to a platform. If you want to collaborate, hire, or just say hello, reach out.
It takes about five minutes. You'll have a file that works in any AI, forever.
Build your Carrierfile →Carry your context.