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A technical newsletter for builders who want clear, sourced analysis of software, AI, infrastructure, markets, and engineering systems.
Systems, constraints, and repair
Replace a VPS Reverse Tunnel with Cloudflare Tunnel
A practical guide to routing public hostnames directly through Cloudflare Tunnel to Nginx and multiple services on a home server.
Train a Kenyan ID OCR-to-JSON Model with MLX and Candle
Generate synthetic OCR records, fine-tune a 50M-parameter model with MLX, measure field accuracy, and prepare the fused weights …
The OCR Engine Is Not the Document System
A local PP-OCRv6 service can keep Kenyan ID extraction private, but the useful product is the mode, schema, test fixture, and …
Set Up Codex Routines
A practical guide to running recurring Codex jobs through the Mattermost bridge with schedules, state files, run receipts, and …
Put Codex Behind Mattermost, Then Stop Overbuilding It
A practical way to run Mattermost on a small server, expose it safely, and use the mobile app as a chat interface to a local Codex …
The Laptop Wasn't Slow. The Screen Was Lying.
A powerful Dell laptop made a fresh Ubuntu install feel broken. The usual checks said everything was fine. They were wrong. The …