agent-sdk-dev vs CLAUDE.md Tester
agent-sdk-dev is a plugin bundle for AI coding tools published by Anthropic. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-official). CLAUDE.md Tester is a plugin bundle for AI coding tools published by danielrosehill. Marketplaces we read that list it: 1 (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 |  CLAUDE.md Tester | |
|---|---|---|
| Claude Code: claude-plugins-official | Listed Version: not stated Forks (GitHub): 4 580 Stars (GitHub): 43 312 Not marked · First seen |
Not listed |
| Community marketplace danielrosehill/claude-code-plugins | Not listed | Listed Version: 0.2.0 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 | agent-sdk-dev | CLAUDE.md Tester |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 43 312 (better) | 0 (worse) |
| Forks (GitHub) (differs) | 4 580 (better) | 0 (worse) |
| Last release | Not published | 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) | 3 | 1 |
| Licence (differs) | Not stated | MIT |
| Repository (differs) | github.com/anthropics/claude-plugins-official | github.com/danielrosehill/claude-md-tester |
| Changes in the last 7 days | 2 | 2 |
| 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
agent-sdk-dev
Development kit for working with the Claude Agent SDK
CLAUDE.md Tester
Safely swap ~/.claude/CLAUDE.md for test/joke configs via symlink. Terminal-only restore that does not depend on the Claude harness, so a hostile test config can never trap you.
How to run each
agent-sdk-dev As a Claude Code plugin
/plugin install agent-sdk-dev@claude-plugins-officialCLAUDE.md Tester As a Claude Code plugin
/plugin marketplace add danielrosehill/claude-code-plugins
/plugin install context-file-tester@danielrosehillCommands 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: agent-sdk-dev · What it can do: CLAUDE.md Tester · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/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.