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海博賽特
HCYTLOG
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Tech / Research / Products

A personal working record

Writing code, keeping a working record.

Danny CYH

I build Termdock, Ingrelens, and cosGlint. These are my notes on making products, working with AI, and the questions that come up along the way.

About me

Featured

Worth reading first.

Two verdicts on the same prompt change: improvement at 0.94x tokens from one run, no change outside noise at 1.02x from five
Start here

The bug that made my evaluation meaningless, and the fingerprint that found it

I spent a week building a tool that measures agent prompt changes, then found out it had been measuring nothing. Subagents inherit no instructions at all, and a fingerprint token in the spec is what proved it.

AI / Dev Read the article
One bounded classification agent under a deterministic control plane: triage settles one-to-one codes by table, the agent gets only the judgment calls, and three program gates stand between its answer and a filing
Also selected

The agent that is not allowed to see the money

I built a tariff reclassification agent without access to duty rates. The frozen August evaluation reached 88.9% at eight digits on its DEAD_CODE stratum; this update separates that result from the six-digit baseline and the production triage path.

AI / Dev Read the article

Latest writing

Recently published.

All writing

  1. The bug that made my evaluation meaningless, and the fingerprint that found it

    AI / Dev

  2. The agent that is not allowed to see the money

    AI / Dev

  3. Two Days, 20 Commits — How I Started Contributing to GitLab Orbit

    Gitlab / Rust

  4. GitLab Duo CLI Advanced Patterns — Batch Automation, Multi-Model Comparison & Noise Reduction

    Gitlab / AI

  5. GitLab Duo CLI: the glab commands I use for code review

    Gitlab / AI

  6. Why We Still Keep Building Termdock

    Product / Engineering