● Thread
The headline.
Thread
Applied AI & ML
Production RAG, fine-tunes and evals: what I shipped, and how I know it works. S3 Vectors in production as an AWS launch partner, plus the eval harness that keeps the claims honest.
/01
Pieces
4 so far.
07 July AI Memory Is Cosmetic 02 June 107 Sub-Agents, All on Opus: Guarding Claude Code's Most Expensive Default also Systems & infrastructure 12 May We Were Going to Build More Vector Servers. AWS Sold Us Storage Instead. also Systems & infrastructure 06 May 7 Models, 2 Deployment Targets, and the Part That Actually Mattered Was Calibration
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Shipped here
What the write-ups run on.
FormRecap LoRA Classifier Llama 3.2 3B · Gemma 2B · QLoRA / DoRA · HuggingFace (PEFT, TRL, bitsandbytes) · Modal · Cloudflare Workers AI live
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Adjacent
Where threads overlap.
2 pieces here also live in Systems & infrastructure.
Systems & infrastructure → The engineering under it. 8