AI note-taking: second brain
Your second brain, in the open: notes, wikis, and knowledge bases.
Direct answer: Six notes and knowledge apps (AFFiNE, Joplin, Logseq, Memos, Outline, TriliumNext) plus four skills for working with Obsidian and building Karpathy-style LLM wikis. It is the foundation the other packs rest on: if knowledge is not captured, nothing else scales.
Included in the Esencial — $15
Plans are cumulative: the Pro Plan includes all Essential Plan packs, and the Complete Plan includes all packs (Essential + Pro). This pack unlocks with the Esencial ($15).
Buy with the Esencial ($15) Or build your custom plan
For ChatGPT Codex: this pack is used from the Codex terminal, where MCP servers, subagents, prompts, and guides support coding and lookup tasks. This view brings together the same 10 resources from the full pack, with the usage focus on ChatGPT Codex.
Use cases
- Capture quick notes in Markdown and sync them across devices
- Keep a team wiki the assistant can consult
- Organize a second brain in Obsidian without breaking vault format
- Archive sources and link them in a local note graph
How to get started
- Start with the simplest resource in the pack and try it on a small real case.
- Connect the second resource only once the first one already works in your daily flow.
- Review the full list of 10 resources and keep the ones you use every week.
Suggested starter prompt
Act as my assistant using the tools from the pack «Productivity: Notes and Knowledge». Your second brain, in the open: notes, wikis, and knowledge bases. Start with the simplest resource, explain each step before running it, and ask for confirmation before changing data, settings, or permissions.
Included resources (10)
- AFFiNE (Software, toeverything/AFFiNE, ★ 73.8k) — Local workspace combining documents, whiteboards, and databases in one place. GitHub
- Joplin (Software, laurent22/joplin, ★ 56.9k) — Markdown notes and tasks app, cross-platform, with end-to-end encrypted sync. GitHub
- Logseq (Software, logseq/logseq, ★ 45.4k) — Local, private knowledge management platform with block notes, links, and tasks. GitHub
- Memos (Software, usememos/memos, ★ 63.4k) — Lightweight Markdown notes service for capturing quick ideas and sharing them, self-hostable. GitHub
- Outline (Software, outline/outline, ★ 41.0k) — Fast, collaborative knowledge base for teams, Markdown-compatible and self-hostable. GitHub
- TriliumNext (Software, TriliumNext/Trilium, ★ 38.5k) — Hierarchical knowledge base for tens of thousands of notes, with tree, maps, and scripts. GitHub
- obsidian-skills (Skill, kepano/obsidian-skills, ★ 50.0k) — Official Obsidian CEO skills so the agent creates and edits notes, Bases, and Canvas without breaking vault format. GitHub
- claude-obsidian (Skill, AgriciDaniel/claude-obsidian, ★ 15.5k) — Self-organizing second brain in Obsidian: the agent reads sources, archives them, and links them in a local Markdown graph. GitHub
- karpathy-llm-wiki (Skill, Astro-Han/karpathy-llm-wiki, ★ 2.6k) — Implementation of the Karpathy LLM Wiki pattern: ingest sources, compile a wiki, query it, and review it with a single skill. GitHub
- obsidian-second-brain (Skill, eugeniughelbur/obsidian-second-brain, ★ 4.7k) — Second brain that maintains itself: save, rewrite, and connect notes in Obsidian while you work with multiple agents. GitHub