vinkius-labs/mcp-fusion

v3.3.2 Breaking

This release includes breaking changes for platform teams planning a safe upgrade.

Published 2mo MCP Developer Tools

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

mcp mcp-framework mcp-server model-context-protocol

Summary

AI summary

Added optional meta layout hints to UI block helpers, presenter composition via extendPresenter(), async callback support with makeAsync(), and declarative async fields in PresenterConfig.

Full changelog

Added

UiBlockMeta — layout hints for UI blocks — Optional meta parameter on all 8 ui.* helpers with title, width, and priority fields. Rendered as XML attributes on <ui_passthrough> wrappers. Fully backward-compatible.
extendPresenter() — Presenter composition — Merge base config with overrides. Rules merged additively (static concatenated, dynamic chained). Schema/UI/name: override wins. Embeds and redactPII paths merged.
makeAsync() — asynchronous callback support — Returns Promise<ResponseBuilder> enriching sync make() with async callbacks. Four fluent methods: .asyncUiBlocks(), .asyncCollectionUiBlocks(), .asyncRules(), .asyncSuggestActions(). Introspection via hasAsyncCallbacks(). Sync make() unchanged (zero breaking changes).
PresenterConfig async fields — Declarative asyncUi, asyncCollectionUi, asyncRules, asyncSuggestActions wired in definePresenter() and extendPresenter().
43 new tests — Comprehensive coverage for UiBlockMeta (13), extendPresenter() (11), and makeAsync() (19).

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About vinkius-labs/mcp-fusion

A TypeScript framework for building production-ready MCP servers with automatic tool discovery, multi-transport support (stdio/SSE/HTTP), built-in validation, and zero-config setup.

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Related context

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Earlier breaking changes

v4.0.0 All packages now published under the `@mcpfusion` npm scope.
v4.0.0 GitHub repository renamed to vinkius-labs/mcpfusion; npm packages under @mcpfusion scope.
v4.0.0 All source code, documentation, CLI output, workflows, and npm packages now use the @mcpfusion scope.