The Harness Matters More Than the Model

I’ve spent the last few weeks building across a few different AI coding tools, and I stopped paying much attention to the model underneath. You spend enough time around AI and you start to believe the model is the part that matters, since it’s what everyone talks about and all the benchmarking is against. But build across enough tools in a short stretch and a different picture shows up. The model is closer to an interchangeable component, and the setup wrapped around it is what decides success. ...

September 1, 2026 · 5 min · Kashif Nazir

Multiple GitHub Accounts on One Mac: Folder-Routed Identity Without SSH Keys

TL;DR. Two GitHub accounts on one machine, routed entirely by which folder a repo lives in. Three problems, three fixes: Problem What it decides Solved by Commit authorship The name and email stamped into the commit includeIf, routed by folder (Layer 1) Push authentication Which account’s credentials talk to GitHub on push Username pinned in the HTTPS remote + gh token (Layer 2) gh CLI account Which account gh pr create and gh repo view act as A shell wrapper that reads the folder (Layer 3) All three route by folder, so nothing depends on remembering to switch accounts. It’s HTTPS with gh-managed tokens throughout and no SSH keys. The steps are below, and the reason for dropping SSH is at the end. ...

August 5, 2026 · 10 min · Kashif Nazir