karpathy-llm-wiki Skill for Claude Code: What It Does and How to Install It

Makes Claude collect sources into a raw/ folder and compile them into a linked wiki/ you can query with citations.

Installs: 8.3K; on skills.sh
Stars: 2.7K; on GitHub
Updated: Jul 2026; last commit

The skill has three operations. Ingest saves a source to raw/ and then creates or updates wiki articles, or only logs it when it adds nothing new. Query answers from the wiki with links to the articles it used and writes no files unless you ask to archive an answer. Lint fixes index and link problems and reports contradictions and gaps.

Its main rule is that every number, date and direct quote in wiki/ must appear word for word in the linked raw file. It bundles one Python script, scripts/check_evidence.py, for that check. The project uses a raw/ and wiki/ layout under your project root and creates what is missing on the first ingest.

Good for

People building a personal knowledge base from articles, papers and notes
Researchers who want answers that cite wiki pages instead of fresh web searches
Anyone who wants a wiki checked for broken links, stale claims and unsupported numbers

Install karpathy-llm-wiki

Claude Code

Copy this prompt.

Install the karpathy-llm-wiki skill in Claude Code. Run this command:

npx add-skill Astro-Han/karpathy-llm-wiki

Then check that it loaded and tell me how to use it.

2
Paste it into Claude Code. It shows the change and asks before running it.

Requires Node.js.

The README gives the skills command for Claude Code, Cursor and OpenCode, and a manual copy for Codex CLI. The skill writes raw/ and wiki/ folders in your project and runs a Python script for the evidence check, so there is no Claude app tab. For other tools the README says to copy SKILL.md, references/ and scripts/ into the skill directory.

From the project README. Source.

What's in the skill

When it loads

Use when building or maintaining a personal LLM-powered knowledge base. Triggers: ingesting sources into a wiki, querying wiki knowledge, linting wiki quality, 'add to wiki', 'what do I know about', or any mention of 'LLM wiki' or 'Karpathy wiki'.

Sections in SKILL.md

Architecture
Initialization
The Grounding Invariant
Ingest
Fetch (raw/)
Triage
Compile (wiki/)
Cascade Updates
Post-Ingest
[YYYY-MM-DD] ingest | <primary article title>
[YYYY-MM-DD] ingest | no material: <project-root-relative raw file path>
Research (multi-source ingest)
Query
Steps
Archiving
Lint

Key facts

Author: Astro-Han (repo owner); the LICENSE names Yuhan Lei as copyright holder
License: MIT (LICENSE file)
Installs on skills.sh: 8,318 (Nov 2, 2026)
GitHub stars: 2,651 (Nov 2, 2026)
Last repo commit: Jul 23, 2026
What it includes: 16 files in the repo, including SKILL.md, 4 templates in references/, 5 example files and scripts/check_evidence.py with its test
Idea from: Andrej Karpathy's LLM Wiki gist, linked in the README

What it includes

Saves a source to raw/, triages it, then creates or updates wiki articles
Triage ends as New, Update, Disputed or No material. It also updates wiki/index.md and appends to wiki/log.md. Fetching uses whatever web or file tools your environment has.
Try: “Add this article to my wiki: https://example.com/post”
Write · Ingest
Creates raw/, wiki/, wiki/index.md and wiki/log.md on the first ingest if missing
It never overwrites existing files. Query and lint do not auto-create the structure.
Write · Initialization
Gathers several sources on a topic, only when you explicitly ask
Searches from several angles, including opposing views, then compiles one source at a time.
Write · Research
Searches the index and wiki, then answers with links to the articles used
Writes no files unless you ask to archive the answer.
Try: “What do I know about transformer architectures?”
Read · Query
Writes a query answer as a new wiki page, marked [Archived] in the index
Only when you ask. It always creates a new page and logs it.
Write · Archive an answer
Fixes index entries, internal links, Raw references and See Also links
Ambiguous cases are reported instead of fixed. Missing index targets are marked [MISSING], not deleted.
Write · Lint: safe fixes
Greps numbers, dates and quotes in wiki articles against their linked raw files
Run as python3 <skill-dir>/scripts/check_evidence.py <project-root>. It reports suspects and never fixes facts.
Runs code · scripts/check_evidence.py
Reports contradictions, outdated claims, orphan pages and missing cross-references
Reported only, never auto-fixed.
Read · Lint: judgment reports

From the official docs

Permissions

Medium risk

What it can do

Read your data
Create and change things
Delete things
Read-only modeHow to turn it on

Watch out for

It writes and edits many files
Ingest can touch several articles, the index and the log through cascade updates. Lint auto-fixes index entries and links. Use version control and review the diff. github.com
It fetches web content into your project
SKILL.md says to get sources using whatever web or file tools your environment provides, and to preserve the original text. Check what was saved to raw/. github.com
Lint can remove dead See Also links
When a See Also target has no match anywhere in wiki/, lint removes the link. Index entries to missing files are marked [MISSING] instead of deleted. github.com

Security advisories

No published security advisories as of Nov 2, 2026.

Technical details

Turning on read-only	Query is described as writing no files unless you ask to archive an answer.
Scopes	Creates raw/ and wiki/ folders and files under your project root Edits wiki articles, wiki/index.md and wiki/log.md Fetches sources with the web tools your assistant has Runs scripts/check_evidence.py with python3 during lint

Questions

What does karpathy-llm-wiki do?

It makes Claude keep a personal knowledge base in two folders: raw/ for untouched source material and wiki/ for compiled articles. It can ingest sources, answer questions from the wiki and lint it.

Does it change my raw sources?

SKILL.md says raw/ is immutable: Claude reads it and never modifies it, apart from saving new sources into it. The wiki/ folder is the part Claude owns and edits.

How do I install it?

Use the install box above. The README gives npx add-skill Astro-Han/karpathy-llm-wiki for Claude Code, Cursor and OpenCode, and says to copy the folder to .agents/skills/karpathy-llm-wiki/ for Codex CLI.

How does it stop made-up numbers?

SKILL.md requires every number, date and direct quote to be found in the raw file before it is written, exactly as written there. The lint step runs a script that greps those values in the linked raw files and reports suspects.

Does it need Python?

Only for the evidence check. SKILL.md runs scripts/check_evidence.py with python3. The script imports re, sys, dataclasses and pathlib from the standard library.

Does it work in the Claude app?

The README does not document a Claude app route. The skill writes raw/ and wiki/ folders in a project and uses a Python script, so the install box has no Claude app tab.

Does it delete anything?

Only dead cross-references. SKILL.md says lint removes a See Also link when its target has zero matches anywhere in wiki/. An index entry that points to a missing file is marked [MISSING] and kept, and SKILL.md says not to delete it. Our advice: keep the wiki in git so you can review every change.

Is it safe?

It creates, edits and appends files in your project, and fetches web sources with whatever tools your assistant has. Our advice: run it in a folder under version control and read the diff after each ingest.

Information

updated Nov 2, 2026

Repository: astro-han/karpathy-llm-wiki

astro-han/karpathy-llm-wiki skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 4

README.md · github.com
SKILL.md · github.com
check_evidence.py · github.com
LICENSE · github.com