A copywriting add-on for writing text used in user interfaces, marketing, and products, then shortening it while retaining important details.

Use it for interface text, landing pages, emails, calls to action, and other product or marketing copy. The input supports iterative Chain-of-Density summarization.

It helps when copy is too long or when a summary leaves out useful information. It focuses on adding missing details while keeping the text compact.

copywriter — Plugin by Agentic-Insights

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 Agentic-Insights/foundry

agentmods

npx agentmods add plugins/agentic-insights/foundry/copywriter

Clone the repo

git clone --depth 1 https://github.com/Agentic-Insights/foundry

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

copywriter 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.

plugins/copywriter/.claude-plugin/plugin.json · 25 lines

What it actually says

{
  "name": "copywriter",
  "version": "1.2.0",
  "description": "Expert copywriting for UX, marketing, and product with Chain-of-Density summarization. Write compelling copy and iteratively compress verbose content.",
  "author": {
    "name": "agentic-insights"
  },
  "repository": "https://github.com/agentic-insights/foundry",
  "license": "Apache-2.0",
  "keywords": [
    "copywriting",
    "ux-writing",
    "marketing",
    "microcopy",
    "landing-pages",
    "emails",
    "cta",
    "chain-of-density",
    "summarization",
    "compression",
    "skill-condenser",
    "agent-skills"
  ]
}

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.

yesterday First seen · 25 lines scan A d919adf5bffe

Subscribe to this mod's changes

copywriter is a plugin published in the GitHub repository Agentic-Insights/foundry (5 stars, last pushed 2mo ago), licensed Apache-2.0. 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 2026-08-31.

Frontend Writing and docs claude-code

copywriter

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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