Who Publishes Agent Plugins?

3 of the 6 organisations that authored or steer the Agent Plugins 1.0.0 standard publish no conformant plugin of their own. Verified on 2026-11-07 by fetching every plugin.json we can find on GitHub and checking it against the official schema: 5,701 distinct Agent Plugins exist across 1,950 repositories, and only 3 of these 6 ship any of their own. The ecosystem is being built by independent publishers, not by the consortium that wrote the specification.

The standard's authors and stewards

Publisher	Plugins	Collections	Clients operated
Microsoft	18	110 manifests	GitHub Copilot, VS Code
Amazon	8	n/a	Kiro
Google	3	n/a	n/a
Cursor	0	n/a	Cursor
OpenAI	0	n/a	ChatGPT, Codex
Vercel	0	n/a	n/a

Collections are bulk-published manifests collapsed to one entry by our dedupe rules, so a single repository cannot dominate the count; they are excluded from the plugin column. A publisher may also ship in a client-proprietary format, which is not a conformant Agent Plugin and is not counted.

Who actually ships

The ten largest publishers in the verified index by plugin count, on 2026-11-07. These are GitHub owners, ranked by what they have actually published.

Verified on 2026-11-07