project-documentation

project-documentation is a skill for Claude Code from testdouble/han. It costs 155 tokens per session (3,073 once invoked), scanned B, original, MIT.

A documentation tool for explaining how a project's features, systems, and components work.

In plain words
What is it for?
Use it to create, update, or organise project documentation for a feature, system, or component.
Why use it?
It helps teams keep technical knowledge in one place so developers can understand and maintain existing code.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md; names the AskUserQuestion tool; mentions AGENTS.md.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the han-documentation plugin — 3 skills shipped together

Good fit Use it to create, update, or organise project documentation for a feature, system, or component.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add testdouble/han
Claude Code
/plugin install han-documentation

Made for: Claude Code.

Or install han-documentation, the plugin that ships this one along with the rest of its 3 skills.

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 project-documentation

README.md
[![agentmods](https://agentmods.dev/badge/skills/testdouble/han/project-documentation.svg)](https://agentmods.dev/skills/testdouble/han/project-documentation)
Your own site
<a href="https://agentmods.dev/skills/testdouble/han/project-documentation"><img src="https://agentmods.dev/badge/skills/testdouble/han/project-documentation.svg" alt="Measured on agentmods" height="20"></a>
Per session 155 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,073 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00155 $0.03073
Opus 5 $0.00077 $0.01537
Sonnet 5 $0.00031 $0.00615
Haiku 4.5 $0.00015 $0.00307

Measured 3d ago against content hash dbf7b931507c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

project-documentation scanned grade B with 1 finding 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 3d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

1. Read the agent configuration file (`CLAUDE.md`, `AGENTS.md`, or equivalent) to understand its existing structure and
han-documentation/skills/project-documentation/SKILL.md · 204 lines

How it starts

The opening of the file, as written. The whole thing — 204 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Project Context

  • CLAUDE.md exists: !find . -maxdepth 1 -name "CLAUDE.md" -type f
  • project-discovery.md: !find . -maxdepth 3 -name "project-discovery.md" -type f
  • personal config directory: !bash "${CLAUDE_PLUGIN_ROOT}/scripts/han-config-dir.sh" 2>/dev/null || echo "$HOME/.claude"
  • project .han/config.md: !cat .han/config.md 2>/dev/null || echo ""

As your first action, use the Read tool on .han/config.md inside the personal config directory path above. A read that returns no file is no personal configuration: continue silently. When that file or the project .han/config.md probe supplies content, apply it per config-rule.md, which governs precedence between the two files, relative-path resolution, and what to do with a file that reads but cannot be used.

Project Documentation

Readability. As you write the documentation, source the standard by invoking han-communication:readability-guidance and apply it. The output is a committed file, so the standard applies at generation time. Hold a named audience above the default: a technically-literate reader who needs to understand the feature's behavior before reading or modifying its code. Scope that frame per section so the technical specifics the reader needs are not simplified away.

Step 1: Evaluate and Gather Context

Guard check: If the request is about an architectural decision, suggest architectural-decision-record instead. If it's about a coding convention, suggest coding-standard instead. Proceed only after confirming this is project documentation.

Docs directory: Resolve project config: read CLAUDE.md's ## Project Discovery section for docs directory and language; fall back to project-discovery.md; fall back to Glob default (docs/). Use the found docs directory with Glob to enumerate existing .md files. If no docs directory was found, create docs/. The found language informs code fence language identifiers in Step 3.

Read the full file on GitHub · 204 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 204 lines · 155 tokens per session scan B dbf7b931507c

Subscribe to this mod's changes

project-documentation is a skill published in the GitHub repository testdouble/han (258 stars, last pushed 6d ago), licensed MIT. It adds 155 tokens to every session and 3,073 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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