Cosmonic: Sandbox AI-Generated Code, MCP, and Functions
Verified publisherWhat a VS Code verified publisher badge means, compared with Open VSX →
Sandbox for Claude Code, Claude Desktop, Codex, OpenCode, Hermes, and Kiro. Sandbox AI-written code securely: build MCP servers, functions, triggers, HTTP, NATS, Kafka, and more. Works with local AI models, Qwen, Gemma, DeepSeek, Mistral, GPT-OSS, and more, all with zero ambient authority.
Tracked since 8 Sept 2026
Daily readings on both stores, taken by us. As of 24 Sept 2026.
Each bar is one day’s change in the store’s own counter.
Where Cosmonic: Sandbox AI-Generated Code, MCP, and Functions ranks in search
Positions observed daily on both stores. Neither store publishes this, and the two run separate search engines over separate catalogues.
| Search | Marketplace | Open VSX |
|---|---|---|
| codex | #922of 1,088↓35 7d | — |
| opencode | #208of 266 | — |
7 more searches, day-by-day history, and the extensions ranked above it. See plans | ||
VS Code Marketplace search ranking: measuring jitter and real movement →
- Installs
- 30.0% 7d
- Rating
- —unrated
- Rank in Language Model Tools
- #7of 7
- Latest
- v0.1.86 Sept 2026
1 releases · first published Sept 2026
What the publisher says
Cosmonic: Sandbox AI-Generated Code, MCP, and Functions’s own readme, changelog and license, as published to the VS Code Marketplace.