Fabian G. Williams aka Fabs

Fabian G. Williams

Principal Product Manager, Microsoft Subscribe to my YouTube.

My Agents Left Me 116 Git Repos. So I Built a Source of Truth.

I let agents build software on my Mac for months, and one morning I could not tell one of them where my own project actually lived. This is the eight hours it took to fix that, and the legend that now keeps my agents honest.

Fabian Williams

8-Minute Read

Stat cards: 116 local repos, 165 on GitHub, 113 logical projects, 3 duplicate clusters, and zero sources of truth becoming one

A few weeks ago I asked an agent to pick up work on one of my own projects. It opened a fresh terminal, looked around, found nothing it recognized, and built a brand new copy of a project I already had. That was not the agent being careless. Nothing on the machine had ever told it where the real one lived. The only map of my own work was a memory in my head, and a memory does not survive contact with a machine where agents do the building.

Qwen 3.6 vs gpt-oss:120b on M3 Max: I Ran a Harder Test, the 8× Speed Gap Surprised Me

I published a Qwen 3.6 vs gpt-oss migration story, then ran an un-gameable eval against both on the same M3 Max. The receipts changed the speed narrative — gpt-oss:120b ran 8 to 11 times faster than qwen3.6:27b at parity reasoning quality. Here is the methodology and the data.

Fabian Williams

11-Minute Read

Horizontal bar chart showing gpt-oss:120b at 137 seconds and qwen3.6:27b at 1593 seconds on the same Round 2 reasoning tasks, with an 11.6× slower callout

I published a post last week about replacing gpt-oss:120b with Qwen 3.6 on my MacBook Pro M3 Max. The numbers in that post were real, but one set of tests was structurally gameable — 38 of 40 baseline images were the same class, so an “always-say-A” stub also scored 95 percent. I went back, designed three un-gameable reasoning tasks, and ran them against both local models on identical hardware. gpt-oss:120b finished the three tasks in 137 seconds. qwen3.6:27b-q8_0 took 1593 seconds —…

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