• Embeddings Are Cheap Enough for Personal Wikis Now

  My Obsidian vault is my main second brain: around 1,800 Markdown notes. Lately I’ve been less interested in what to put in it and more interested in a different question: what useful tools could I build on top of it? A few ideas came to …

• Build Your Own Skills Repo

  If you’ve been working with AI coding agents for a while, you’ve probably started collecting workflows. You might not call them that yet, but they’re there. Another name for workflows is Skills. Some are tiny: run these checks before …

• Building a Linter for Your Obsidian Vault

  In software we don’t trust ourselves to keep a codebase clean by hand. We run linters. They catch the dead code, the unused import, the function nobody calls anymore, the link that points at a file that got deleted three commits ago. We’ve …

• The Capture Trap: Why Your Note Vault Is a Graveyard

  Open your notes app and scroll to the bottom of the inbox. How many of those clippings have you reread? How many turned into anything? The answer is probably “almost none.” You have hundreds of saved articles, and half-finished thoughts, …

• Four Ways to Build Your Own Agentic Harness

  The model is the commodity. You rent it. Everything else, the loop, the tools, the state, the permissions, the memory, the orchestration, is the harness. And the harness is the part you get to own. So the real question, when people say they …

• Five Places RAG Shows Up in Agentic Systems

  Ask most people what RAG is and they’ll tell you it’s semantic document search. You chunk up a pile of text, embed it, stuff it in a vector database, and pull the relevant bits back at query time. That’s the textbook example, and it’s a …

• A Field Glossary for Agentic Knowledge Work

  Everywhere you look right now, somebody is saying agentic this and agent that. Harness, scaffold, skill, subagent, agentic OS. The vocabulary is piling up faster than anyone can keep track of, and a lot of it gets used loosely, sometimes by …

• Two Kinds of Memory for Your CLI Agent

  So you set up a memory layer for your local CLI agent. Now what? How do you actually get that memory in front of the agent so it does something useful? I’m going to walk through what I did with mem0, but the shape of this applies to pretty …

• Karpathy's LLM Wiki: Your Second Brain, Maintained by the Machine

  A few months ago Andrej Karpathy dropped a GitHub gist that coined a term I haven’t stopped thinking about: the LLM Wiki. The pitch is simple enough to fit on a napkin. Obsidian is the IDE, the LLM is the programmer, and the wiki is the …

• CODE: The Four Stages of a Note

  Yesterday I walked through the history of the second brain, the 500-year arc from glued paper slips to LLM-readable vaults. Today I want to zoom in on one piece of it: CODE, Tiago Forte’s four-stage life cycle of a note. If PARA is where …