How to Install Your AI Brain in ChatGPT

To install your AI brain in ChatGPT, download your brain folder from Google Drive, create a ChatGPT Project, upload the brain files into it and paste a short set of instructions into the project settings. From then on, every chat inside that project starts out knowing who you are, how you sound and what you are working toward. The whole setup takes about 20 minutes, and you don't need any technical background.

If someone sent you this page with a link to your brain folder, these directions are written for you. I build these brains for founders and professionals at Human First Media, and this is the setup I walk people through.

What's in your brain folder

Your brain is a set of plain text files, each ending in .md. You can open any of them and read them like a document. Here are the ones that matter most for ChatGPT:

Some brains have both CLAUDE.md and AGENTS.md. In that case AGENTS.md is usually a two-line note pointing to CLAUDE.md, and CLAUDE.md holds the full rules. Use whichever file has the full rules.

Step 1. Download your brain from Google Drive

1. Open the link to your brain folder. Sign in to Google if asked.
2. If the folder was shared with you, right-click it in Drive and choose Download. Google zips a folder before downloading it, which can take a minute.
3. Find the .zip file in your Downloads folder and double-click it to unzip it. On Windows, right-click it and choose Extract All.
4. Open the unzipped folder and check that you can see CLAUDE.md (or AGENTS.md), index.md and the wiki folder.

If the download stalls, Google's help page suggests allowing third-party cookies for drive.google.com or turning off browser extensions and trying again (Google Drive Help: Download a file).

A note on file types. OpenAI's upload page lists TXT, DOCX and PDF as supported document formats and doesn't list .md by name. A .md file is plain text. If ChatGPT ever refuses one, rename the ending from .md to .txt and upload it again.

Step 2. Check what your ChatGPT plan allows

Projects are included with every ChatGPT plan at no extra cost. The number of files you can put in one project depends on your plan (OpenAI Help Center: Projects in ChatGPT):

You can upload up to 10 files at a time. To see your plan, open your account menu in ChatGPT and go to Settings.

If your brain has more files than your plan allows, start with this order and stop when you reach your limit:

1. CLAUDE.md (or AGENTS.md if that's where the full rules are)
2. index.md
3. wiki/02-brand-voice.md
4. wiki/01-identity-and-positioning.md
5. wiki/company-details.md
6. wiki/03-ideal-client.md
7. wiki/04-programs-and-offers.md
8. log.md
9. The rest of the wiki folder, then stories, then sources

On the Free plan, the first five files on that list give ChatGPT enough to sound like you.

Step 3. Option A: Set up a ChatGPT Project (my recommendation)

A Project keeps your chats, files and instructions together, so ChatGPT uses the same context every time you open it.

1. Go to chatgpt.com on a computer and sign in.
2. In the left sidebar, select New project.
3. Name it something clear, such as "My Brain," and pick an icon and color.
4. If you see a memory setting, choose Project-only memory. That keeps your brain inside this project and keeps other chats out of it. You can change it later in Project settings.
5. Open the project and add your files. Drag them in or use the add-files button, up to 10 at a time, in the order from Step 2.
6. Select the ••• menu, then Project settings, and paste the instructions below into the instructions box. Save.

Instructions to paste (copy all of it):

Why paste a short version instead of the whole rules file? The rules file is uploaded as a file already, and a short instruction keeps the project focused on reading it. Project instructions apply only inside that project and take priority over your general ChatGPT custom instructions.

Step 4. Option B: Connect Google Drive instead of uploading

ChatGPT has a Google Drive app. Once it's connected, you can paste a link to a Drive file or folder into your project as a source, so ChatGPT works from the copy in Drive (OpenAI Help Center: Projects in ChatGPT).

1. In ChatGPT, open Plugins or Apps (the label depends on your version), find Google Drive and connect it.
2. Sign in with the Google account that can open your brain folder, review the permissions and approve.
3. Open your project, choose Add source and paste the link to your brain folder.

Some honest caveats before you rely on this:

• Availability depends on your plan, your location and, for work accounts, your administrator. If you don't see Google Drive, use Option A.
• OpenAI notes that the Google Drive app doesn't sync content in advance when it's added inside a project. ChatGPT searches Drive when you ask, which can make answers less complete than uploaded files.
• I haven't confirmed how well ChatGPT reads .md files through Drive. Test it with the prompts in Step 6.

My suggestion is to do both: upload the core files from Step 2 so the basics are always there, and connect Drive for everything else.

Step 5. Option C: A custom GPT (only if you're on a work plan)

Older guides tell you to build a custom GPT. That advice is out of date. As of October 2026, OpenAI's help pages say:

• New GPTs can't be created on personal accounts, including Free, Go, Plus and Pro. Business, Enterprise and Edu workspaces can create them if the workspace allows it.
• OpenAI plans to retire custom GPTs, with Dec 11, 2026 as the scheduled date, and recommends moving to Plugins.
• GPTs don't use your saved memory or custom instructions. Each conversation starts fresh.

Sources: GPTs in ChatGPT and Custom GPT retirement and migration FAQ.

If you already have a GPT on a work plan and want your brain in it, open Explore GPTs, select My GPTs, then Edit GPT. Paste the instructions from Step 3 into Instructions and upload your brain files under Knowledge, up to 20 files. For everyone else, a Project does the same job and will keep working after GPTs retire.

Step 6. Test your brain

Open a new chat inside your project and try these prompts. Good answers will name the files they drew from.

1. "Read index.md and my identity file, then describe me in five sentences. After each sentence, name the file it came from."
2. "Using my brand voice file, write a 150-word LinkedIn About section for me. Then list any voice rules you followed."
3. "What's marked [CONFIRM] in my brain? List each one with its file, so I know what to answer."
4. "Based on my ideal client file, draft a short note introducing myself to someone I'd like to work with. Keep it under 120 words."

If an answer sounds generic, ask ChatGPT which files it read. If it can't name them, check that the files finished uploading and that the project instructions saved.

Step 7. Keep your brain up to date

A brain gets more useful each time you add to it. When something changes, such as a new role, a new offer, a better bio or a story you want to keep:

1. Edit the right file in your Drive folder. Your index.md shows which file holds what.
2. Add a dated line to log.md saying what changed, such as "Oct 21, 2026. Updated 04-programs-and-offers with new consulting offer."
3. In your ChatGPT project, open the sources list, delete the old copy of the file and upload the new one. If you upload a file with the same name, ChatGPT asks whether to Upload anyway or Skip. Deleting the old copy first keeps you from ending up with two versions.
4. Upload the new log.md too.

You can also go the other way. When ChatGPT writes something you love in a project chat, open that message's menu and save it to the project. Then copy it into the right brain file so your Drive folder stays the master copy.

Privacy tips

Your brain describes you in detail, so treat it like a private notebook.

• Keep secrets out. Never put passwords, bank or card numbers, ID numbers, API keys or login links in any brain file. If you find one, delete it from the file before you upload.
• Choose project-only memory. It keeps the brain from mixing into your other chats.
• Decide about training. On personal plans, your chats may be used to train OpenAI's models unless you opt out. Go to Settings, then Data controls, and turn off Improve the model for everyone (OpenAI Help Center: Data controls). Business, Enterprise and Edu workspaces aren't used for training by default.
• Be careful with sharing. Projects can be shared, including with "Anyone with a link." Leave yours private unless you mean to share it, and keep your Drive folder set to Restricted.
• Know where files go. Files you upload are also saved in your ChatGPT Library. Deleting a chat doesn't delete the file, so remove old copies from Library if you want them gone.

Frequently asked questions

Can I use my AI brain on the free ChatGPT plan?
Yes, with limits. A free project holds 5 files, and free accounts can upload 3 files per day. Start with your rules file, index.md and your voice, identity and company details files.

Do I need a custom GPT to use my brain in ChatGPT?
No. New custom GPTs can't be created on personal plans, and OpenAI plans to retire custom GPTs. A ChatGPT Project with your files and instructions works on every plan.

Can ChatGPT read my brain straight from Google Drive?
Often, yes. You can connect the Google Drive app and add your folder link as a project source. Availability depends on your plan and location, and OpenAI says Drive content added in a project isn't synced in advance, so upload your core files as well.

What if ChatGPT won't accept my .md files?
Rename the file ending from .md to .txt and upload again. The contents stay the same, since a .md file is already plain text.

How do I update my brain after I change a file?
Edit the file in your Drive folder, add a dated line to log.md, then delete the old copy from your project's sources and upload the new one along with the updated log.md.

Is my brain private in ChatGPT?
Your project stays private unless you share it. On personal plans, turn off "Improve the model for everyone" in Data controls if you don't want your chats used for training, and never put passwords or account numbers in your brain files.

Want a brain built for you?

If you don't have a brain yet, or yours needs a refresh, we build them at Human First Media. See how it works at humanfirstmedia.com/brain, or get in touch and tell me what you'd like your brain to help with.