modelcontextprotocol / modelcontextprotocol/ext-apps

Sandbox origin-based state

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#213 6 comments 0 reactions 1 assignee View on GitHub

@idosal is already working on this.

Since Jan 27, 2026.

enhancement
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TypeScript
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Description

Current test environments often use a static sandbox origin which might create assumptions around localStorage and other origin-based forms of state.

Should the spec make some kind of statement on persistence and/or state leaks between different apps?

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