William Callahan

@WilliamCallahan

Building @aVentureVC (Techstars NYC, a company research platform using AI agents - aventure.vc) & researchly.chat. CFA, Angel/VC investor.

San Francisco, CA

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William Callahan
@WilliamCallahan
Jan 3, 2025
New year, new personal website! With an added in-site terminal - williamcallahan.com
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William Callahan
@WilliamCallahan
Sep 1
This 👌
Vox
@Voxyz_ai
Aug 31
Yesterday I posted about Codex turning small tasks into big systems. Several people in the replies pointed to the same tool: 𝗣𝗼𝗻𝘆𝘁𝗮𝗶𝗹. Besides adding rules to AGENTS.md, you can install this ready-made Skill. It’s like giving Codex / Claude Code a senior developer who’s
William Callahan
@WilliamCallahan
Aug 29
From a talented team!
Ben Holmes
@BHolmesDev
Aug 28
Introducing /skill-doctor v1 Skill doctor is a skill that improves your skills: - Crawls your past CC, Codex, or Warp convos - Scores them for efficiency and code quality - Proposes diffs to your skills that you'd actually merge (STE-100 approved) warp.dev/skill-doctor 🔖
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William Callahan
@WilliamCallahan
Aug 24
Love this!
tobi lutke
@tobi
Aug 24
Git at Scale (by cursor) has been one of the most interesting blog posts i've read in a while. It came right when I was frustrated with Shopify's internal git system. As an exercise, I've implemented it over the weekend as open source. It's a single rust binary that you can
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William Callahan
@WilliamCallahan
Aug 20
Qwen 3.8 27b is a great open source model, certainly the best of its size yet. williamcallahan.com/blog/qwen-3-8-…