B12 vs claude-dev-skill
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). claude-dev-skill is a plugin bundle for AI coding tools published by buidangminh23. Marketplaces we read that list it: 1 (Community GitHub marketplaces). As of our marketplace pass on 2026-10-17. 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 buidangminh23/claude-dev-skill | Not listed | Listed Version: 0.1.7 Forks (GitHub): 0 Stars (GitHub): 4 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 | claude-dev-skill |
|---|---|---|
| Marketplaces that list it (differs) | 3 (better) | 1 (worse) |
| Stars (GitHub) (differs) | 10 (better) | 4 (worse) |
| Forks (GitHub) | 0 | 0 |
| Last release (differs) | 2026-10-16 (better) | 2026-10-16 (worse) |
| 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/buidangminh23/claude-dev-skill |
| Changes in the last 7 days | 3 | 3 |
| First seen (differs) | 2026-10-11 | 2026-10-15 |
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).
claude-dev-skill
Unofficial skill that turns the claude.dev engineering blog into working guidance for Claude Code and the Claude API, refreshed from the site every hour
How to run each
B12 As a Claude Code plugin
/plugin marketplace add anthropics/knowledge-work-plugins
/plugin install b12-claude-plugin@knowledge-work-pluginsclaude-dev-skill As a Claude Code plugin
/plugin marketplace add buidangminh23/claude-dev-skill
/plugin install claude-dev-skill@claude-dev-skillCommands 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: claude-dev-skill · 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.