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fix: add legacy flat _meta key for MCP App rendering in Claude (#585)

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Claude.ai reads the flat `_meta["ui/resourceUri"]` key to discover UI apps,
not the nested `_meta.ui.resourceUri`. Without the flat key, tools like
n8n_health_check and n8n_list_workflows showed as collapsed accordions
instead of rendering rich UI. Now sets both keys, matching the behavior
of the official registerAppTool helper from @modelcontextprotocol/ext-apps.

Conceived by Romuald Członkowski - www.aiadvisors.pl/en

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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Romuald Członkowski
2026-02-09 06:40:52 +01:00
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parent 8217229e2f
commit 34159f4ece
5 changed files with 22 additions and 8 deletions
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@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
## [2.35.1] - 2026-02-09
### Fixed
- **MCP Apps: Fix UI not rendering for some tools in Claude**: Added legacy flat `_meta["ui/resourceUri"]` key alongside the nested `_meta.ui.resourceUri` in tool definitions. Claude.ai reads the flat key format; without it, tools like `n8n_health_check` and `n8n_list_workflows` showed as collapsed accordions instead of rendering their rich UI apps. Both key formats are now set by `injectToolMeta()`, matching the behavior of the official `registerAppTool` helper from `@modelcontextprotocol/ext-apps/server`.
Conceived by Romuald Czlonkowski - https://www.aiadvisors.pl/en
## [2.35.0] - 2026-02-09
### Added