# AI Coding Tip 020 - Create a Second Brain

DevFeed: [AI Coding Tip 020 - Create a Second Brain](<https://devfeed.tech/articles/ai-coding-tip-020-create-a-second-brain-18210.md>)

Original publisher: [Read original article](<https://maximilianocontieri.com/ai-coding-tip-020-create-a-second-brain>)

Author: Maxi Contieri

Published: 2026-05-17T14:10:52Z

Content type: tutorial

Language: en

Sources: [Maximiliano Contieri - Software Design](<https://devfeed.tech/sources/maximiliano-contieri-software-design.md>)

Topics: [Obsidian](<https://devfeed.tech/topics/obsidian-md.md>), [Markdown](<https://devfeed.tech/topics/markdown.md>), [Large Language Model](<https://devfeed.tech/topics/llm.md>), [YAML](<https://devfeed.tech/topics/yaml.md>), [coding](<https://devfeed.tech/topics/coding.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [ai-coding](<https://devfeed.tech/tags/ai-coding.md>), [context](<https://devfeed.tech/tags/context.md>), [markdown](<https://devfeed.tech/tags/markdown.md>), [memory](<https://devfeed.tech/tags/memory.md>), [notes](<https://devfeed.tech/tags/notes.md>), [yaml](<https://devfeed.tech/tags/yaml.md>)

## AI overview

This tutorial explains how to use Obsidian or similar local Markdown tools, YAML metadata, structured notes, and dynamic queries to build a persistent project knowledge base. It describes giving AI tools access to relevant notes and code so they can use prior decisions, debugging information, and project context across sessions.

## Source excerpt

TL;DR: Use Obsidian with Markdown notes, YAML metadata, and direct AI file access to build a Second Brain with LLMs that gives your tools persistent project context. Common Mistake ❌ You paste a snip