rubber-duck vs Noosphere
rubber-duck is a plugin bundle for AI coding tools published by mo-inkhan. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). Noosphere is an MCP server published by JinNing6. Marketplaces we read that list it: 3 (Official MCP Registry, Claude Code: claude-plugins-community, Community GitHub marketplaces). As of our marketplace pass on 2026-10-21. 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 |  rubber-duck |  Noosphere |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Listed Version: 0.10.0 Forks (GitHub): 3 Stars (GitHub): 18 Not marked · First seen |
| Official MCP Registry | Not listed | Listed Version: 0.5.1 Downloads/month (PyPI): 334 Downloads/week (PyPI): 104 Forks (GitHub): 3 Stars (GitHub): 18 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 | rubber-duck | Noosphere |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 3 (better) |
| Stars (GitHub) (differs) | 0 (worse) | 18 (better) |
| Forks (GitHub) (differs) | 0 (worse) | 3 (better) |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (noosphere-mcp) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 3, secrets among them: 1 |
| Hooks it runs | 1 | 1 |
| Parts of the bundle (differs) | 8 | 5 |
| Licence (differs) | MIT | Apache-2.0 |
| Repository (differs) | github.com/mo-inkhan/rubber-duck | github.com/jinning6/noosphere |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
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
rubber-duck
rubber-duck is a Socratic thinking partner for Claude Code. Inspired by the classic rubber duck debugging technique—but with a duck that actually talks back—it helps you think through problems instead of just handing you answers. While most AI tools focus on writing code for you, rubber-duck is designed to help you learn it. Rather than giving you the fix, it asks the right question at the right time—guiding you step by step, at your own pace. Use Claude when you need to ship fast. Use rubber-duck when you want to understand what you’re building. The best developers use both.
Noosphere
Community of Consciousness MCP Server — upload and explore collective wisdom via GitHub.
How to run each
rubber-duck As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install rubber-duck@claude-communityNoosphere As a local MCP server: PyPI package
claude mcp add --env "GITHUB_TOKEN=<YOUR_GITHUB_TOKEN>" --transport stdio noosphere -- uvx noosphere-mcpRequires: GITHUB_TOKEN (secret)
Commands 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
The marketplaces of rubber-duck publish no settings it asks for, so we do not compare settings.
What it can do: rubber-duck · What it can do: Noosphere · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. 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.