
Banshi developed a framework-agnostic UI rendering core and a Svelte 5 renderer for the thesysdev/crayon repository, enabling structured UI generation from LLM outputs across both React and Svelte. By extracting core logic into a new TypeScript package, Banshi unified parsing, prompt generation, and validation for multiple adapters while maintaining a stable public API. The work included building a SvelteKit demo that showcased component-based UI with robust error handling and mock streaming. Banshi upgraded the testing and linting infrastructure, migrated tests to the new core, and delivered 30 passing tests, resulting in improved maintainability and cross-framework iteration speed.
March 2026 (2026-03): Delivered a framework-agnostic UI rendering core and a Svelte 5 renderer to enable structured UI rendering from LLM outputs across React and Svelte. This involved extracting core functionality into a new @openuidev/lang-core package and introducing the Svelte adapter @openuidev/svelte-lang, with React adapters updated to consume the shared core. A SvelteKit demo (svelte-chat) showcases mock streaming and component-based UI (Stack, Card, TextContent, Button) with robust error handling. The effort included upgrading testing and lint infrastructure, migrating tests to lang-core, and delivering 30 passing tests to validate the new architecture. Public API remains stable for existing clients, while enabling faster cross-framework iteration and a more maintainable UI rendering stack.
March 2026 (2026-03): Delivered a framework-agnostic UI rendering core and a Svelte 5 renderer to enable structured UI rendering from LLM outputs across React and Svelte. This involved extracting core functionality into a new @openuidev/lang-core package and introducing the Svelte adapter @openuidev/svelte-lang, with React adapters updated to consume the shared core. A SvelteKit demo (svelte-chat) showcases mock streaming and component-based UI (Stack, Card, TextContent, Button) with robust error handling. The effort included upgrading testing and lint infrastructure, migrating tests to lang-core, and delivering 30 passing tests to validate the new architecture. Public API remains stable for existing clients, while enabling faster cross-framework iteration and a more maintainable UI rendering stack.

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