Official plugins for connecting Codex and Claude Code to Sosein production and staging environments.
The sosein plugin connects agents to the production Sosein MCP server. It
supports OAuth sign-in and lets an agent search, read, create, and edit Sosein's
artifacts using the signed-in user's existing Sosein permissions.
codex plugin marketplace add soseinai/sosein-plugins
codex plugin add sosein@soseinInstall the staging plugin when you explicitly want to work with non-production Sosein data:
codex plugin add sosein-staging@soseinStart a new Codex task after installation. Sosein will ask you to sign in when the MCP connection is first used.
To fetch an updated marketplace snapshot and reinstall the latest plugin:
codex plugin marketplace upgrade sosein
codex plugin add sosein@soseinclaude plugin marketplace add soseinai/sosein-plugins
claude plugin install sosein@soseinInstall the staging plugin when you explicitly want to work with non-production Sosein data:
claude plugin install sosein-staging@soseinRun /reload-plugins or restart Claude Code after installation. Sosein will ask
you to sign in when the MCP connection is first used.
To update later:
claude plugin marketplace update sosein
claude plugin update sosein@soseinThe plugin can:
- inspect the delegated profile, account context, and workspace destinations;
- search documents, notes, records, and events;
- read artifacts, selected blocks, and structured objects;
- create documents, notes, or records privately or in a workspace, from native agent Markdown or source Markdown;
- edit text, block structure, and object fields with current-content checks; and
- read and create reviews, comments, and suggestions.
Each MCP identity is delegated from the signed-in human user in its respective environment. Installing either plugin does not grant access to artifacts the user cannot already access in that Sosein environment.
See plugins/sosein/README.md for the complete agent
surface and editing contract.
The plugin guidance is aligned with the 26-tool catalog in Sosein Cloud commit
82fb2e66c (2026-09-02), including the format-v5 block surface. This is a
source-contract baseline, not a claim that both hosted environments have
deployed that revision. The connected server's tool schemas and delegated
scopes determine what is available.
When the server changes, compare its src/mcp/mod.rs tool definitions and
src/mcp/tools/reviews/mod.rs definitions in the Cloud server crate with both
plugins' skills and README tables. Keep the two workflows identical except for
environment routing. Update both Codex and Claude package versions together.
This public repository contains the production and staging Sosein plugins. The staging plugin is intended only for explicit testing and non-production work. Internal engineering plugins are not distributed here.
Sosein is proprietary software. The plugin package is published here for use with Codex and Claude Code; no additional license is granted beyond that use.