Three of this week's biggest AI announcements are about the same thing: memory. ChatGPT got Memory Sources. Gemini got Personal Intelligence plus custom instructions in Docs. Claude got Dreaming. The tools that remember you, your business, and your voice are about to look very different from the tools that don't.
Here is how to set up persistent memory across all three in 15 minutes so they stop forgetting who you are.
Step 1: Write Your "Working Bio" (3 minutes)
Before you touch any AI tool, write 5-7 lines that capture the context that every AI assistant should know about you. This becomes the foundation of every memory system.
Template to copy:
- I am [name], [role] at [company/brand].
- My audience is [specific ICP].
- My brand voice is [3 adjectives + 1 thing to avoid].
- I write content about [3 pillars].
- I do not use [list 5-10 banned words/phrases that don't sound like you].
- When I ask for content, default to [preferred format].
- When unsure, ask me one clarifying question before writing.
Keep this in a notes file. You will paste it into 3 places below.
Step 2: Configure ChatGPT Custom Instructions (2 minutes)
Open ChatGPT > Settings > Personalization > Custom Instructions.
Paste your Working Bio into the "What would you like ChatGPT to know about you?" field. In "How would you like ChatGPT to respond?" add: "Be direct. No filler. No gratuitous emojis. If a fact is uncertain, say so."
This applies to every new chat automatically, on web and mobile.
Step 3: Turn On Memory Sources in ChatGPT (1 minute)
In ChatGPT, click the Sources icon under any personalized response. You will see exactly which saved memories or past chats were used. Delete anything outdated. From now on, when ChatGPT references a past chat you no longer want it to use, click delete on the source and the model will stop referencing it.
If you connect Gmail (Plus and Pro), ChatGPT will start using your actual email context for replies. Worth turning on if you draft customer emails in ChatGPT often.
Step 4: Set Up a Claude Project for Each Brand or Client (3 minutes)
Open Claude > Projects > New Project.
Name it after your brand or client. In the "Project knowledge" field, paste your Working Bio plus your 5 best-performing past pieces (LinkedIn posts, ad copy, newsletters - whatever you want Claude to learn your voice from).
In the Project's system prompt, add:
"Match the voice of the example pieces in this Project. When generating new content, use the same opening style, sentence rhythm, and CTA pattern. If you cannot match the voice, say so before drafting."
Every chat inside that Project starts with this memory loaded. No more re-pasting brand guidelines.
Step 5: Set Persistent Instructions for Gemini in Google Docs (2 minutes)
This rolled out May 4. Open any Google Doc > click the Gemini side panel. Type one or two persistent instructions:
- "Always use a concise professional tone in this document."
- "When I ask for a summary, give me a 3-bullet recap at the top, then the full summary below."
- "Avoid these words in any draft: [paste your banned words list]."
Gemini will follow these rules across every Doc tied to your Google account. You can store up to 1,000 active instructions, but start with 3-5.
Step 6: Build a Weekly "Memory Refresh" Ritual (2 minutes)
Once a week, run a 2-minute audit:
1. Open ChatGPT > Settings > Personalization > Manage memories. Delete anything that no longer reflects how you work.
2. Open Claude > Projects > review the project knowledge. Add any new top-performing piece you wrote that week. Remove anything outdated.
3. Open Google Docs > Gemini > review your instructions list. Prune duplicates.
Memory degrades the same way browser bookmarks do. A 2-minute weekly cleanup keeps the signal high.
Step 7: Cross-Train Your Stack with One "Voice Sample" Document (2 minutes)
Create one Google Doc titled "My Voice - 5 Examples."
Paste 5 short pieces of your best writing. This Doc becomes a copy-paste source for any AI tool that does not have native memory yet (Perplexity, Grok, smaller tools). When you ask any of them for content, prefix your prompt with: "Match the voice in this sample: [paste 1-2 examples from the Doc]."
You now have one master voice file that travels with you across every AI tool.
💡 Key insight: AI memory is becoming the moat. The tools that remember your voice, your audience, and your past decisions will compound in usefulness every week. The tools that forget will feel slower and dumber by comparison. Spend 15 minutes this week setting up memory once, and every prompt you write for the next 12 months gets cheaper.