Run an AI second brain on three folders and one file
A builder argues you do not need a database: notes/, people/ and projects/ folders of plain Markdown, one topic per file, plus one instructions file the AI reads.
Source
@0xKurro on X · 2026-10-21
Written in our own words. Credit to the original author. Link checked 2026-10-22.
What they did
A builder argues you do not need a database: notes/, people/ and projects/ folders of plain Markdown, one topic per file, plus one instructions file the AI reads.
Result (as claimed)
A minimal second brain any agent can read.
Tools they used
Cost: Pricing depends on the tools you pick; check each official pricing page.
Set it up
Define the job
Say exactly what you want done and what the agent may and may not do on your behalf.
Share only what is needed
Give Claude the minimum files or access required. Avoid sharing passwords in chat when a safer login flow exists.
Review the plan
Ask the agent to show its plan or draft before it acts, and approve each step that has real consequences.
Check the result
Confirm the outcome yourself (order placed, request sent, document understood) and keep a record.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Run an AI second brain on three folders and one file What the original author did: A builder argues you do not need a database: notes/, people/ and projects/ folders of plain Markdown, one topic per file, plus one instructions file the AI reads. Reported result (as claimed by the author): A minimal second brain any agent can read. Source: https://x.com/0xKurro/status/2112912340907671823 Tools they used: Claude Category: Personal & life Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Run an AI second brain on three folders and one file What the original author did: A builder argues you do not need a database: notes/, people/ and projects/ folders of plain Markdown, one topic per file, plus one instructions file the AI reads. Reported result (as claimed by the author): A minimal second brain any agent can read. Source: https://x.com/0xKurro/status/2112912340907671823 Tools they used: Claude Category: Personal & life Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Run an AI second brain on three folders and one file What the original author did: A builder argues you do not need a database: notes/, people/ and projects/ folders of plain Markdown, one topic per file, plus one instructions file the AI reads. Reported result (as claimed by the author): A minimal second brain any agent can read. Source: https://x.com/0xKurro/status/2112912340907671823 Tools they used: Claude Category: Personal & life Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to build an AI second brain and personal wiki · How to use AI agents with Obsidian and your notes · How to build AI agents for SEO and ads
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