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EnglishWhat Prototype Projects Has Eugene Yan Built?
Updated
Eugene Yan has built a set of experimental AI applications and tools that he describes as prototyping "for fun." The projects named on eugeneyan.com are AI Reading Club, AlignEval, Obsidian Copilot, and AI Coach, with the site's "more" wording indicating this is a partial list rather than an exhaustive catalog. These are side projects and experiments rather than commercial products, and at least one—Obsidian Copilot—is documented in a dedicated write-up on the site.
The named prototypes
| Project | What it appears to be | Evidence on the site |
|---|---|---|
| AI Reading Club | An AI-assisted reading application | Listed among prototype apps |
| AlignEval | An evaluation tool for alignment/LLM outputs | Listed among prototype apps |
| Obsidian Copilot | An assistant for writing and reflecting inside Obsidian | Listed as a prototype; also covered in a 11 Jun 2023 article, "Obsidian-Copilot: An Assistant for Writing & Reflecting" |
| AI Coach | A coaching-style AI application | Listed among prototype apps |
The site presents these under a "Prototyping" navigation item alongside "Start Here," "Writing," "Speaking," and "About," which signals that prototyping is a standing part of how Eugene Yan works, not a one-off.
What ties the projects together
The prototypes cluster around the same themes as his writing: AI-powered products, recommendation systems, and engineering. AlignEval and Obsidian Copilot in particular sit at the intersection of LLM applications and evaluation or workflow tooling—areas he also covers in articles such as "Patterns for Building LLM-based Systems & Products" and "Evaluating the Effectiveness of LLM-Evaluators."
A practical way to read the list: these are demonstrations of applying ML/LLMs to concrete tasks, which matches his stated goal of teaching how to apply these techniques effectively through ApplyingML.com and Applied-LLMs.org.
How to explore them
- Start at eugeneyan.com and use the Prototyping section to reach the project list; the homepage names the four projects above and notes there are more.
- For depth on a single project, read the Obsidian-Copilot article (11 Jun 2023), which explains the assistant's purpose for writing and reflection.
- Cross-reference the Writing section for related methodology pieces if you want the reasoning behind tools like AlignEval.
Caveats
The available site material gives project names and one-line descriptions but not feature lists, source code links, or usage instructions for each prototype. Treat the table above as a map of what exists, not a specification. If you need details on a specific project—such as whether it is open source or how to run it—check the individual project page or the linked article rather than assuming capabilities from the name.