han-coding

han-coding is a plugin for Claude Code from testdouble/han. Its manifest loads nothing; the 11 skills it bundles cost 1,984 tokens per session together, scanned A, original, MIT.

A collection of coding tools for writing, testing, reviewing, investigating, and documenting software. It includes workflows for TDD, refactoring, API design, code overviews, and test planning.

In plain words
What is it for?
Use it when building features, changing existing code, reviewing a branch, investigating bugs, designing an API, or planning automated and manual tests.
Why use it?
It brings related development tasks into one add-on so an agent can follow consistent workflows across a project. The individual tools address both implementation and analysis work.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it when building features, changing existing code, reviewing a branch, investigating bugs, designing an API, or planning automated and manual tests.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add testdouble/han
/plugin install han-coding
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/testdouble/han

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for han-coding

README.md
[![agentmods](https://agentmods.dev/badge/plugins/testdouble/han/han-coding/github.svg)](https://agentmods.dev/plugins/testdouble/han/han-coding)
Your own site
<a href="https://agentmods.dev/plugins/testdouble/han/han-coding"><img src="https://agentmods.dev/badge/plugins/testdouble/han/han-coding/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for han-coding

Your own site · 80×15
<a href="https://agentmods.dev/plugins/testdouble/han/han-coding"><img src="https://agentmods.dev/badge/plugins/testdouble/han/han-coding.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 11 skills cost 1,984 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

han-coding scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

han-coding/.claude-plugin/plugin.json · 7 lines

What it actually says

{
  "name": "han-coding",
  "description": "Coding-facing skills for the Han suite: writing, reviewing, testing, investigating, and standardizing code. Home of the tdd skill, which drives a feature or behavior through a BDD-framed red-green-refactor loop with an enforced observed-failure gate, and the refactor skill, which restructures existing code without changing its behavior through a test-gated refactoring loop, plus design-an-api (designing an interface contract for one stated goal through an options round, a question round, and an adversarial validation round), code-review (comprehensive review of local changes), code-overview (a progressive-disclosure, understand-now overview of unfamiliar code or a PR's changes), code-walkthrough (a paced, one-step-at-a-time walk through a branch's changes in conversation), architectural-analysis (module-level coupling, data flow, concurrency, risk, and SOLID assessment), automated-test-planning (coverage-gap and edge-case test plans), manual-test-planning (plain-language manual test plans a person runs by hand), investigate (evidence-based root-cause debugging), and coding-standard (creating and updating coding standards). Depends on han-core and han-communication; bundled by the han meta-plugin.",
  "version": "3.4.0",
  "dependencies": ["han-communication", "han-core"]
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed e0377d0f0e10
  2. 1mo ago First seen · 7 lines scan A e2cee385195c

Subscribe to this mod's changes

han-coding is a plugin published in the GitHub repository testdouble/han (304 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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