ChaoLab

Research findings, paper reproductions, and lessons from building and testing models.

Each article explains the question, the evidence, and what the result changed—including the work we stopped.

Research Notes Our own papers and findings: the idea, the experiment, and the limits of the conclusion.

Reproductions Experiments reproducing other authors’ papers: what matched, what differed, and what we learned.

Field Notes Models and tools we build: releases, failures, trade-offs, and engineering lessons.

Research Notes

Research notes will appear here as they are published.

Reproductions

Paper reproductions will appear here as they are published.

Field Notes

A Small Chinese PII Model—and the Address Fix We Rolled Back A local 35M-parameter detector, its Chinese-name recall gains, and the short-address regression that made an attempted fix unsuitable.

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title: "ChaoLab"
description: "Research findings, paper reproductions, and lessons from building and testing models."
toc: true
---

Each article explains the question, the evidence, and what the result changed—including the work we stopped.

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::: {.content-card}
**[Research Notes](#research-notes)**
Our own papers and findings: the idea, the experiment, and the limits of the conclusion.
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::: {.content-card}
**[Reproductions](#reproductions)**
Experiments reproducing other authors' papers: what matched, what differed, and what we learned.
:::

::: {.content-card}
**[Field Notes](#field-notes)**
Models and tools we build: releases, failures, trade-offs, and engineering lessons.
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## Research Notes {#research-notes}

Research notes will appear here as they are published.

## Reproductions {#reproductions}

Paper reproductions will appear here as they are published.

## Field Notes {#field-notes}

::: {.content-grid}

::: {.content-card}
**[A Small Chinese PII Model—and the Address Fix We Rolled Back](zh-pii-tagger-35m.qmd)**
A local 35M-parameter detector, its Chinese-name recall gains, and the short-address regression that made an attempted fix unsuitable.
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