Show HN: Arrowproof – check an LLM-drawn architecture diagram against your code
arrowproof Every arrow in your architecture diagram, checked against the code. Karpathy's advice is to ask your LLM for a diagram instead of a wall of text. The advice is good, with one catch: a diagram that a model draws looks right even when it is wrong. arrowproof is an agent skill that checks every box and every arrow of an Excalidraw diagram against the real import graph of your repository.
- ▪arrowproof Every arrow in your architecture diagram, checked against the code.
- ▪Karpathy's advice is to ask your LLM for a diagram instead of a wall of text.
- ▪The advice is good, with one catch: a diagram that a model draws looks right even when it is wrong. arrowproof is an agent skill that checks every box and every arrow of an Excalidraw diagram against the real import graph of your repository
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| Original publisher | GitHub |
| Canonical URL | https://github.com/ahmtsahin/arrowproof |
| Publication time | Fri, 02 Oct 2026 14:16:19 +0000 |
| Retrieval time | 2026-10-02T14:48:41.835Z |
| Last seen | 2026-10-02T14:48:41.835Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
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| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
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| Cluster | 278JD9H98eBT · 1 stories |
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| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
arrowproof Every arrow in your architecture diagram, checked against the code. Karpathy's advice is to ask your LLM for a diagram instead of a wall of text. The advice is good, with one catch: a diagram that a model draws looks right even when it is wrong. arrowproof is an agent skill that checks every box and every arrow of an Excalidraw diagram against the real import graph of your repository. It shows you the import line behind each arrow. Claude Haiku drew Flask from memory After arrowproof The result: 15 arrows verified. 1 arrow is indirect, because app.py reaches config.py only through sansio/app.py. 2 arrows have no import behind them, because views.py imports only globals.py and the type aliases in typing.py.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at GitHub.