# kirin.ceo

> Notes from building in the age of AI. 第一人稱實作紀錄：AI 搜尋能見度、
> 爬蟲觀測、資料基礎建設，以及還沒有結果的實驗。

Last-Updated: 2026-09-08
Language: zh-Hant
Author: Kirin

## What this site is

A personal engineering journal, not a product publication. Every article opens
with a monospace metadata block stating date, dataset, method and
**limitations** — the limitations field is enforced by the site generator, which
refuses to emit an article without one.

The reason: on this site the author is both the experimenter and the thing being
measured. Samples are small, confounds are many, and there is a preference for a
particular outcome. Stating the boundary first is the only way the reader — and
the author three months later — can read the numbers correctly.

## Data boundary

All observation data comes from the author's **own** sites (shell.fans,
kol.fans). Client data is never used here, even where some figures are public
elsewhere — that publication consent does not extend to a personal journal.

## Articles

- [量測系統壞掉的那一週](https://kirin.ceo/experiments/when-the-instrument-broke):
  2026-08-24, one platform's probes failed 22/22 while the other ran clean, so
  the dashboard still showed numbers. On why measurement failure looks like
  "the number changed" rather than like failure.
- [換了尺之後，前後的數字還能比嗎？](https://kirin.ceo/notes/comparing-across-a-ruler-change):
  after swapping the measurement model, the author's own figures did not move —
  and why "the number didn't move" is not evidence the two instruments are
  equivalent.
- [看了三個月的 AI 爬蟲日誌](https://kirin.ceo/notes/crawler-log-surprises): 18,097
  requests over 82 days. The highest-volume crawler had the lowest content-hit
  rate; one crawler arrived 27 times and got nothing. Crawler logs describe your
  site's routing history more than they describe anyone's interest in you.
- [一行 nginx 設定讓整個網站變成下載檔](https://kirin.ceo/notes/one-line-of-nginx):
  nginx `types` replaces the inherited MIME table rather than adding to it.
  A three-minute production incident and the testing habit it changed.
- [品牌名藏在第 88% 的位置](https://kirin.ceo/experiments/where-the-brand-name-sits):
  an experiment with **no result yet** — hypothesis and change published before
  the measurement, deliberately, so the story cannot be retrofitted.

## Disclosure

Written by the operator of ShellFans AI Technology (https://shell.fans/).
This is a personal journal, not that company's publication, and **not
third-party validation of it**. No services are sold here; no sponsored content.
Full policy: https://kirin.ceo/editorial-policy

## Related site, different job

Operational how-to material lives at https://topcc.me/ — documentation voice,
reference tables. This site writes about what went wrong and what was
misunderstood. Where a subject appears on both, the question differs; neither is
a rewrite of the other.