B12 vs skins
B12 is a plugin bundle for AI coding tools published by b12io. Marketplaces we read that list it: 3 (Claude: knowledge-work-plugins, Claude Code: claude-plugins-community, Community GitHub marketplaces). skins is a plugin bundle for AI coding tools published by hellosverre. Marketplaces we read that list it: 1 (Community GitHub marketplaces). As of our marketplace pass on 2026-10-22. 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 |  B12 | |
|---|---|---|
| Claude: knowledge-work-plugins | Listed Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 10 Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 10 Not marked · First seen |
Not listed |
| Community marketplace hellosverre/claude-skins | Not listed | Listed Version: 0.5.14 Forks (GitHub): 35 Stars (GitHub): 188 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 | B12 | skins |
|---|---|---|
| Marketplaces that list it (differs) | 3 (better) | 1 (worse) |
| Stars (GitHub) (differs) | 10 (worse) | 188 (better) |
| Forks (GitHub) (differs) | 0 (worse) | 35 (better) |
| Last release (differs) | 2026-10-16 | Not published |
| Where it runs | Installs as a plugin bundle | Installs as a plugin bundle |
| 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 | 1 |
| Licence (differs) | Apache-2.0 | MIT |
| Repository (differs) | github.com/b12io/b12-claude-plugin | github.com/hellosverre/claude-skins |
| Changes in the last 7 days (differs) | 1 | 2 |
| First seen (differs) | 2026-10-11 | 2026-10-20 |
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
B12
B12 plugin with two skills: Website Generator (create a B12 website from a brief description) and B12 Website Editor (edit a live B12 website using Claude's browser access in Claude Cowork).
skins
Skins for Claude Code: tool rows with icons, diff, table and Mermaid chart cards, a usage band and fifteen themes. /skin swaps them live.
How to run each
B12 As a Claude Code plugin
/plugin marketplace add anthropics/knowledge-work-plugins
/plugin install b12-claude-plugin@knowledge-work-pluginsskins As a Claude Code plugin
/plugin marketplace add hellosverre/claude-skins
/plugin install skins@hellosverre-modsCommands 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: B12 · What it can do: skins · 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 the public marketplace file https://github.com/anthropics/claude-plugins-community/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.