han

A marketplace listing for the Han plugin suite, a collection of add-ons for evidence-based planning, investigation, communication, documentation, and related software-project work.

In plain words
What is it for?
Use it to identify Han plugins, their owners, versions, descriptions, sources, and bundled or optional components.
Why use it?
It lets a catalogue describe the suite and its component plugins, including which bundled capabilities the main plugin depends on.

Plugin for Claude Code

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.

Claude Code
/plugin marketplace add testdouble/han
agentmods
npx agentmods add plugins/testdouble/han/marketplace
Clone the repo
git clone --depth 1 https://github.com/testdouble/han

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

han 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 yesterday.

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.

.claude-plugin/marketplace.json · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "han",
  "owner": {
    "name": "Test Double"
  },
  "metadata": {
    "description": "Han: evidence-based planning, investigation, and documentation skills for software projects."
  },
  "plugins": [
    {
      "name": "han",
      "source": "./han",
      "description": "Meta-plugin that installs the bundled Han suite. Has no components of its own; it depends on han-communication, han-core, han-documentation, han-research, han-planning, han-coding, han-github, and han-reporting so installing it pulls them all in. Does not bundle the opt-in han-feedback, han-atlassian, or han-plugin-builder plugins.",
      "version": "5.4.0"
    },
    {
      "name": "han-communication",
      "source": "./han-communication",
      "description": "Foundational communication plugin for the Han suite. Owns the canonical readability standard, writing-voice profile, and explanation standard, the readability-guidance skill that surfaces the first two into a calling skill's context for in-voice drafting, the explanation-guidance skill that surfaces the third at the point a run talks to a person, the readability-editor agent that runs the adversarial rewrite, and the edit-for-readability skill. Depends on nothing and sits beneath every other plugin; the plugins that produce prose output depend on it.",
      "version": "1.2.0"
    },
    {
      "name": "han-core",
      "source": "./han-core",
      "description": "The shared foundation of the Han suite: the specialist agent roster the other plugins dispatch, the project-discovery skill with its project-scanner agent, and the canonical evidence and YAGNI rule files. The documentation skills live in han-documentation, the pre-planning research skills in han-research, the planning skills in han-planning, and the coding skills in han-coding; each depends on han-core.",
      "version": "3.1.1"
    },
    {
      "name": "han-documentation",
      "source": "./han-documentation",
      "description": "Documentation skills for 

Read the full file on GitHub · 90 lines

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. yesterday First seen · 90 lines scan A f7ee0fe0dc28

Subscribe to this mod's changes

han is a plugin published in the GitHub repository testdouble/han (247 stars, last pushed 4d ago), 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.