Plugin Management vs extension-mcp
Plugin Management is a plugin bundle for AI coding tools published by Anthropic. Marketplaces we read that list it: 1 (Claude: knowledge-work-plugins). extension-mcp is a plugin bundle for AI coding tools published by Cezar Augusto. Marketplaces we read that list it: 1 (Community GitHub marketplaces). As of our marketplace pass on 2026-10-13. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace | ||
|---|---|---|
| Claude: knowledge-work-plugins | Listed Version: 0.2.2 Forks (GitHub): 3 345 Stars (GitHub): 29 497 Not marked · First seen |
Not listed |
| Community marketplace extensiondev/mcp | Not listed | Listed Version: 10.11.6 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Plugin Management | extension-mcp |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 29 497 (better) | 0 (worse) |
| Forks (GitHub) (differs) | 3 345 (better) | 0 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (@extension.dev/mcp) |
| Transport | Not stated | Not stated |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 2 | 5 |
| Licence (differs) | Not stated | Apache-2.0 |
| Repository (differs) | github.com/anthropics/knowledge-work-plugins | github.com/extensiondev/mcp |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen (differs) | 2026-10-11 | 2026-10-13 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Plugin Management
Create, customize, and manage plugins tailored to your organization's tools and workflows. Configure MCP servers, adjust plugin behavior, and adapt templates to match how your team works.
extension-mcp
MCP tools for browser extension development: scaffold from 50+ templates, run the dev server with HMR, inspect the live DOM and logs, and build store-ready bundles for Chrome, Edge, and Firefox.
How to run each
Plugin Management As a Claude Code plugin
/plugin marketplace add anthropics/knowledge-work-plugins
/plugin install cowork-plugin-management@knowledge-work-pluginsextension-mcp As a Claude Code plugin
/plugin marketplace add extensiondev/mcp
/plugin install extension-mcp@extensiondev-mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Plugin Management · What it can do: extension-mcp · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/knowledge-work-plugins/blob/HEAD/.claude-plugin/marketplace.json. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.