What is pencil-replicator?

A browser-to-design capture tool that recreates the web page currently shown in Chrome as a Pencil (.pen) file. It uses separate agents to analyze, build, and check the result.

Use it to capture a website or user interface from Chrome and turn the visible design into an editable Pencil file.

It removes the need to copy a web page into Pencil by hand and provides a review step for checking how closely the file matches the screen.

pencil-replicator — Plugin by sean-sunagaku

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 sean-sunagaku/claude-code-plugin

agentmods

npx agentmods add plugins/sean-sunagaku/claude-code-plugin/pencil-replicator

Clone the repo

git clone --depth 1 https://github.com/sean-sunagaku/claude-code-plugin

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

pencil-replicator 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 2d 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.

design/pencil-replicator/.claude-plugin/plugin.json · 14 lines

What it actually says

{
  "name": "pencil-replicator",
  "version": "1.0.0",
  "description": " Chrome で表示中の Web 画面を Pencil (.pen) ファイルに高精度で再現する Agent Team スキル。 3つの専門エージェント（screen-analyzer, design-builder, quality-reviewer）が 分析→構築→品質検証のサイクルを回し、忠実な画面再現を実現する。 Use when: Pencil で再現して、画面を Pencil に写して、Chrome を Pencil にコピー、 pencil-replicate、デザインをキャプチャ、UI を Pencil に",
  "author": {
    "name": "sunagaku"
  },
  "license": "MIT",
  "keywords": [
    "pencil",
    "replicator"
  ]
}

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.

2d ago First seen · 14 lines scan A 4cbfef1b8210

Subscribe to this mod's changes

pencil-replicator is a plugin published in the GitHub repository sean-sunagaku/claude-code-plugin (36 stars, last pushed 1mo 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.

Browser automation Code review Frontend

pencil-replicator

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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