feat(web/apps): spec-conformant Apps host + CLI/deep-link path for programmatic review#1510

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tobinsouth wants to merge 55 commits into

modelcontextprotocol:v2/mainfrom

tobinsouth:apps-host-parity

Commits on Jun 22, 2026

feat(web/apps): enforce per-app _meta.ui.csp in the sandbox proxy
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feat(web/apps): push live theme to running apps via host-context-changed
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feat(web/apps): seed and live-push hostContext.styles to running apps
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feat(web/apps): seed and live-push hostContext.containerDimensions
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fix(web/apps): harden sandbox CSP builder against injection
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feat(web/apps): honor view size-changed and resize the app container
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feat(web/apps): wire ui/request-display-mode through the protocol
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feat(web/apps): support ui/download-file in the apps host bridge
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feat(web/apps): support ui/message — log view-submitted user content
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feat(web/apps): surface app log notifications in a collapsible log panel
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fix(web/apps): harden ui/download-file against scheme abuse and prompt injection
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feat(web/apps): replay staged tool-input-partial fragments before tool-input
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fix(web/apps): use \p{Cc} for download-label control-char strip
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fix(web/apps): tighten sandbox CSP defaults and download-label sanitizer
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fix(web/apps): build the per-app CSP host-side and wrap untrusted HTML in a fixed shell
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feat(cli): add --app-info to probe a tool's MCP App UI metadata
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fix(web/apps): correctness fixes for resource load, downloads, host-context, and container measurement
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feat(web): deep-link auto-connect and openApp pre-selection
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docs: add mcp-app-review recipe and an mcp_app_demo test fixture
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fix(web,test-servers): document deep-link CSRF gate and harden demo widget origin checks
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refactor(web/apps): reuse existing helpers and SDK affordances
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refactor(web/apps): simplify state-reset, dedupe subcomponents, drop dead code
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docs(test-servers): point mcp_app_demo widget at ext-apps SDK for origin handling
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test(web/apps): assert wrapSandboxedHtml introduces no host-authored <iframe>
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fix(web,cli): deep-link auto-connect on empty catalog, appArgs pre-fill, CLI output newlines
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fix(test-servers): mcp_app_demo widget sends ui/initialize (View→Host) instead of listening for it
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fix(test-servers): mcp_app_demo merges host-context-changed partials
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fix(web,test-servers): deep-link upsert race + ui/notifications/initialized method name
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Commits on Jun 23, 2026

Commits on Jun 24, 2026