second-brain SKILL.md skillA
second-brain from coreyhaines31/makerskills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add coreyhaines31/makerskills/second-brain@v0.2.1Pins v0.2.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- coreyhaines31/makerskills
- Path
skills/second-brain/SKILL.md- Versions recorded
- 5
- Latest version
- v0.2.1, committed Oct 22, 2026
- First version recorded
- Aug 18, 2026
- Size
- 11,962 bytes
- Repository stars
- 882
- License
- MIT
When you want to capture into, compile, query, lint, or connect your personal Second Brain. Wraps the Karpathy LLM Wiki schema (Obsidian or any markdown vault) — raw/ (unprocessed sources), wiki/ (AI-compiled interlinked topic pages), outputs/ (generated artifacts). Vault defaults to ${SECOND_BRAIN_VAULT:-$HOME/Documents/SecondBrain}/. Six modes — capture (drop something into raw/), compile (process unprocessed raw files into wiki pages, update INDEX.md), query…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# /second-brain — Karpathy LLM Wiki workflow
Wraps an existing Second Brain in Obsidian (or any markdown-based vault). The wiki vault's schema doc (`CLAUDE.md` or `AGENTS.md`) is the authoritative schema — the skill orchestrates the operations the user has been doing manually.
## Mental model
Three layers, each with a clear role:
```
raw/ → wiki/ → outputs/
sources compiled generated
artifacts
```
- **raw/** — unprocessed source material. Articles, highlights, ideas, braindumps, tweets. Type-prefixed (`article-`, `idea-`, `highlights-`, `braindump-`, `note-`, `resource-`, `tweet-`). Never deleted — source of truth.
- **wiki/** — AI-compiled topic pages. One page per concept, not per source. Interlinked via `[[wikilinks]]`. `INDEX.md` at root.
- **outputs/** — generated artifacts from queries: research summaries, analyses, slide decks. Named descriptively.
Folders to leave alone during wiki ops: `Projects/`, `Daily/`, `Templates/`, `Inbox/`, `Notes/`, `Tasks.md`, `Kanban.md`, `Home.md`.
## Step 1 — Load vault config + schema
…Read the whole file at its exact version.
How to install
mdr add coreyhaines31/makerskills/second-brain@sha256:4074192a6a879090The line at the top of this page pins the label v0.2.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_4qg5hv35hcgopafv)
0 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 18, 2026 and Oct 22, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.2.1 latest | 2026-10-22 | 2a44ef8 | 11,962 B | A | view · diff |
| v0.2.1 | 2026-10-08 | 016131f | 11,947 B | A | view · diff |
| v0.2.0 | 2026-10-08 | 4d58639 | 11,947 B | A | view · diff |
| v0.2.0 | 2026-10-08 | 6d8e1e1 | 11,930 B | A | view · diff |
| v0.2.0 | 2026-08-18 | 4e84cbe | 11,815 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11962 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
coreyhaines31/makerskills · 882 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4qg5hv35hcgopafv GET https://markdownregistry.com/api/v1/resolve?ref=coreyhaines31/makerskills/second-brain GET https://markdownregistry.com/api/v1/blob/4074192a6a879090520e28ac431faf3660245840d52e64f1bceba8e5e877783d
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from coreyhaines31/makerskills
Every file in coreyhaines31/makerskills