Splash screens, animated.Your app, ready for agents.

01 / Try it

One file and one hook.

{
  "WEBVIEW_CONFIG": {
    "splashScreen": {
      "backgroundColor": "#ffffff",
      "minDuration": 1200
    }
  }
}

import { useTool } from "catalyst-core/webmcp"

useTool({
  name: "add_to_cart",
  description: "Add this product to the cart.",
  inputSchema: { type: "object" },
  execute: async () => addToCart(productId),
})

Full setup: HTML splash and WebMCP.

02 / What's new

New since 1.0.1.

Splash screens, animated

Ship public/splashscreen.html and the native splash image hands over to your page, which stays up until the app's first page has loaded. minDuration holds it a little longer, and it is dismissed after 10 seconds regardless.

@mayansharma#533

Your app, ready for agentsExperimental

useTool() registers a tool from a component, a route's tool field derives one from the route, and WebMcpProvider adds navigate, get_current_route and get_page_info. This docs site registers its own, like search_docs.

@mayankmahavar1mg#475

A calmer terminal

Every command prints a short header, one line per step with its timing, and one diagnostic block on failure with the error code, location, hint and docs link. The full bundler output lives behind --verbose.

@mayansharma#535

03 / Goodbye, hello

Goodbye react-helmet-async, hello React 19 <head>.

MetaTag no longer depends on react-helmet-async. Route metadata from setMetaData renders through React 19's own <head> support, and head tags no longer outlive their page after client navigation. If your app imported react-helmet-async itself, add it to your own dependencies.

@astha1905#502

04 / Also fixed

Smaller things, sorted.

• WebMcpProvider no longer throws on every page under catalyst serve. This is the one change since 1.0.2.@mayankmahavar1mg#549
• Fast Refresh works for components written as JSX in .js files, instead of reloading the page.@akshat-OwO#526
• catalyst serve refuses a build whose inlined config no longer matches config/config.json.@akshat-OwO#527
• Otel.init() logs to console instead of throwing when the app never called configureLogger().@mayansharma#530
• catalyst-core no longer imports prop-types at runtime without declaring it.@tyagidevansh#528
• Signing passwords are redacted from the output of a failed signed build.@mayansharma#536

Everything else on this page first shipped in 1.0.2, earlier the same day.