A0
A0 language skill, the a0 MCP server, an after-edit check hook and A0 commands.
Plugin bundle · by Joe Simo
About
A0 is a plugin bundle for AI coding tools published by Joe Simo. Marketplaces we read that list it: 1 (Community GitHub marketplaces). We first saw it on 2026-10-13 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Installs as a plugin bundle
- Hooks: 1
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a Claude Code plugin
Built from what Community GitHub marketplaces declares.
/plugin marketplace add joe-simo/a0
/plugin install a0@a0Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Community marketplace joe-simo/a0 (Open the source on GitHub) | Listed | 0.8.16 | No figure published | Not marked |
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.
Listed in one community marketplace
| Marketplace | Repository | Stars (GitHub) |
|---|---|---|
| a0 | joe-simo/a0 | 0 |
What the bundle contains
As published on Community GitHub marketplaces.
MCP servers: 1
a0
Skills: 1
a0
Commands: 3
a0-checka0-emita0-run
Hooks: 1
PostToolUse
What changed
- Became a product we track
- Community GitHub marketplaces: appeared
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Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
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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.