fix: update MCP Apps _meta.ui.resourceUri to use nested format (SEP-1865) #6372
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…865) Fixes #6364 The draft spec SEP-1865 expects `_meta.ui.resourceUri` (nested object) but goose was expecting `_meta['ui/resourceUri']` (flat key with slash), which prevented MCP Apps UI from rendering. Updated ToolCallWithResponse.tsx to use the correct nested format.
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Pull request overview
Updates the MCP Apps _meta.ui.resourceUri format to match the draft spec SEP-1865, changing from a flat key structure ('ui/resourceUri') to a nested object structure (ui.resourceUri).
Key Changes
- Introduced
UiMetatype with nested structure for better type safety - Updated
maybeRenderMCPAppfunction to access_meta?.ui?.resourceUriusing the nested format
Collaborator
|
how come this worked with the mcp servers we tested before? |
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Author
Because both the servers and goose were based on an earlier iteration of the draft spec. Refer to deprecation note here https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/draft/apps.mdx#resource-discovery |
Collaborator
|
should we support both for now? |
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Author
no, I don't think we need to. |
alexhancock
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Jan 7, 2026
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* main: fix: update MCP Apps _meta.ui.resourceUri to use nested format (SEP-1865) (#6372)
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* 'main' of github.com:block/goose: Fixed fonts (#6389) Update confidence levels prompt injection detection to reduce false positive rates (#6390) Add ML-based prompt injection detection (#5623) docs: update custom extensions tutorial (#6388) fix ResultsFormat error when loading old sessions (#6385) docs: add MCP Apps tutorial and documentation updates (#6384) changed z-index to make sure the search highlighter does not appear on modal overlay (#6386) Handling special claude model response in github copilot provider (#6369) fix: prevent duplicate rendering when tool returns both mcp-ui and mcp-apps resources (#6378) fix: update MCP Apps _meta.ui.resourceUri to use nested format (SEP-1865) (#6372) feat(providers): add streaming support for Google Gemini provider (#6191) Blog: edit links in mcp apps post (#6371) fix: prevent infinite loop of tool-input notifications in MCP Apps (#6374)
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* main: (31 commits) added validation and debug for invalid call tool result (#6368) Update MCP apps tutorial: fix _meta structure and version prereq (#6404) Fixed fonts (#6389) Update confidence levels prompt injection detection to reduce false positive rates (#6390) Add ML-based prompt injection detection (#5623) docs: update custom extensions tutorial (#6388) fix ResultsFormat error when loading old sessions (#6385) docs: add MCP Apps tutorial and documentation updates (#6384) changed z-index to make sure the search highlighter does not appear on modal overlay (#6386) Handling special claude model response in github copilot provider (#6369) fix: prevent duplicate rendering when tool returns both mcp-ui and mcp-apps resources (#6378) fix: update MCP Apps _meta.ui.resourceUri to use nested format (SEP-1865) (#6372) feat(providers): add streaming support for Google Gemini provider (#6191) Blog: edit links in mcp apps post (#6371) fix: prevent infinite loop of tool-input notifications in MCP Apps (#6374) fix: Show platform-specific keyboard shortcuts in UI (#6323) fix: we load extensions when agent starts so don't do it up front (#6350) docs: credit HumanLayer in RPI tutorial (#6365) Blog: Goose Lands MCP Apps (#6172) Claude 3.7 is out. we had some harcoded stuff (#6197) ...
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* main: (89 commits) fix(google): treat signed text as regular content in streaming (#6400) Add frameDomains and baseUriDomains CSP support for MCP Apps (#6399) fix(ci): add missing dependencies to openapi-schema-check job (#6367) feat: http proxy support Add support for changing working dir and extensions in same window/session (#6057) Sort keys in canonical models (#6403) added validation and debug for invalid call tool result (#6368) Update MCP apps tutorial: fix _meta structure and version prereq (#6404) Fixed fonts (#6389) Update confidence levels prompt injection detection to reduce false positive rates (#6390) Add ML-based prompt injection detection (#5623) docs: update custom extensions tutorial (#6388) fix ResultsFormat error when loading old sessions (#6385) docs: add MCP Apps tutorial and documentation updates (#6384) changed z-index to make sure the search highlighter does not appear on modal overlay (#6386) Handling special claude model response in github copilot provider (#6369) fix: prevent duplicate rendering when tool returns both mcp-ui and mcp-apps resources (#6378) fix: update MCP Apps _meta.ui.resourceUri to use nested format (SEP-1865) (#6372) feat(providers): add streaming support for Google Gemini provider (#6191) Blog: edit links in mcp apps post (#6371) ...
wpfleger96
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* main: (89 commits) fix(google): treat signed text as regular content in streaming (#6400) Add frameDomains and baseUriDomains CSP support for MCP Apps (#6399) fix(ci): add missing dependencies to openapi-schema-check job (#6367) feat: http proxy support Add support for changing working dir and extensions in same window/session (#6057) Sort keys in canonical models (#6403) added validation and debug for invalid call tool result (#6368) Update MCP apps tutorial: fix _meta structure and version prereq (#6404) Fixed fonts (#6389) Update confidence levels prompt injection detection to reduce false positive rates (#6390) Add ML-based prompt injection detection (#5623) docs: update custom extensions tutorial (#6388) fix ResultsFormat error when loading old sessions (#6385) docs: add MCP Apps tutorial and documentation updates (#6384) changed z-index to make sure the search highlighter does not appear on modal overlay (#6386) Handling special claude model response in github copilot provider (#6369) fix: prevent duplicate rendering when tool returns both mcp-ui and mcp-apps resources (#6378) fix: update MCP Apps _meta.ui.resourceUri to use nested format (SEP-1865) (#6372) feat(providers): add streaming support for Google Gemini provider (#6191) Blog: edit links in mcp apps post (#6371) ...
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Summary
Fixes #6364
The draft spec SEP-1865 expects
_meta.ui.resourceUri(nested object structure) but goose was expecting_meta['ui/resourceUri'](flat key with slash), which prevented MCP Apps UI from rendering.Changes
Updated
ui/desktop/src/components/ToolCallWithResponse.tsxto use the correct nested format:UiMetatype from flat key to nested structuremaybeRenderMCPAppfunction to access_meta?.ui?.resourceUriinstead of_meta?.['ui/resourceUri']Testing