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Practical notes on product development, engineering, and running a one-person company in collaboration with AI.

Notes from real projects

Field notes

18articles

Vibe Coding at 438,000 Lines: How I Keep the Project From Drifting

A StratThread case study on running five applications, eleven shared packages, and 174 database migrations through specifications, explicit state authority, verification, and release gates.

2026-09-16 02 engineering practice

Frontend Jank: Give Service Workers, Web Workers, and React the Right Jobs

A practical guide to reducing repeat I/O with a Service Worker, moving measured CPU work into Web Workers, and isolating React renders before they reach expensive charts.

2026-09-16 03 engineering practice

Frontend Performance: Lessons From a 325-Byte Bundle Failure

A practical client optimization review covering boot-graph budgets, lazy boundaries, stable vendor chunks, batched initialization reads, and event-driven refresh.

2026-09-16 04 engineering practice

Frontend or Backend Agent Tool? Keep Display and Storage Consistent

Operations that affect frontend state and must keep the displayed and persisted result consistent should call existing frontend business actions. Stores connect those actions to the UI.

2026-09-14 05 engineering practice

Tool-call optimization: stop using context as a data transfer layer

General tool-call design patterns for input references, backend working storage, compact results, on-demand reads, and asynchronous continuation, illustrated by a market-analysis implementation.

2026-09-08 06 engineering practice

Low tool-call success? Fix these six layers before switching models

A practical Agent optimization review covering tool scope, schemas, repair results, retries, state, and observability before model comparison.

2026-09-03 07 engineering practice

A Shorter Prompt Won’t Fix Your Agent: 10 Problems I Hit

A weak Agent is not always a weak model. Real numbers show how context, tools, state, streaming, and useful system records shape the result together.

2026-08-31 08 engineering practice

Prompt Cache Reuse Dropped From 99% to Zero—Here’s Why

Two production traces show a simple rule: when the order at the start changes, prompt-cache reuse can fall from 99% to zero even if the content looks almost the same.

2026-08-30 09 Getting started

Inside a One-Person AI Company: What I’m Building Right Now

A current record of the products, AI infrastructure, and GeekCode writing I am working on—including what is not finished yet.

2026-08-27 10 engineering practice

Should You Test Vibe-Coded Software? Use 4 Risk Layers, Not Coverage

Vibe Coding needs tests, but more is not always better. Start with what a change could break, then choose the smallest useful check for that risk.

2026-08-26 11 engineering practice

Why Vibe Coding Gets Unstable—and the Engineering System I Use

AI can write code quickly, but quick is not the same as safe. Define the promise first, write the code second, then check and record what really happened.

2026-08-26 12 engineering practice