Londeren marketplace

Londeren marketplace is a plugin for Claude Code from Londeren/claude-plugins. Its token cost is not measured, scanned A, original, MIT.

A collection of Claude Code and Claude.ai add-ons from Londeren. The catalogue entry lists several separate tools, including ones for writing prompts and turning books into reusable skills.

In plain words
What is it for?
Use it to access Londeren's listed add-ons for prompt writing, knowledge extraction, text editing, and related tasks.
Why use it?
It provides a single package for installing and discovering the author's add-ons instead of handling each add-on separately. The available jobs depend on which included add-on is used.

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 Londeren/claude-plugins
agentmods
npx agentmods add plugins/londeren/claude-plugins/marketplace
Clone the repo
git clone --depth 1 https://github.com/Londeren/claude-plugins

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 Londeren marketplace

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

Londeren marketplace 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 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.

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 · 47 lines

What it actually says

{
  "name": "Londeren",
  "owner": {
    "name": "Sergey Lebedev",
    "url": "https://github.com/Londeren"
  },
  "description": "Plugins by Londeren for Claude Code and claude.ai. One entry per plugin under plugins/.",
  "plugins": [
    {
      "name": "prompt-writer",
      "source": "./plugins/prompt-writer",
      "category": "productivity",
      "tags": [
        "prompt-engineering",
        "system-prompt",
        "writing"
      ]
    },
    {
      "name": "book-to-skill",
      "source": "./plugins/book-to-skill",
      "category": "productivity",
      "tags": [
        "skill-generation",
        "knowledge-extraction",
        "methodology",
        "distillation"
      ]
    },
    {
      "name": "glavred-skill",
      "source": {
        "source": "url",
        "url": "https://github.com/Londeren/glavred-skill.git"
      },
      "description": "Reviews and edits social media posts by the method of Maxim Ilyahov. Reports findings level by level (meaning, delivery, wording, format) and rewrites a post keeping the author's facts and voice. Works in Russian, lives in its own repository.",
      "category": "productivity",
      "tags": [
        "editing",
        "copywriting",
        "social-media",
        "russian"
      ]
    }
  ]
}
Contents

The plugins it lists here

This marketplace lists 2 plugins kept in the same repository. Each has its own page, its own measurements and its own install command.

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 · 47 lines scan A 188f535590d2

Subscribe to this mod's changes

Londeren marketplace is a plugin published in the GitHub repository Londeren/claude-plugins (4 stars, last pushed 9d 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 2026-08-31.