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Compose Multiplatform 1.12.0 adds experimental MCP server for AI agents, web font fallback, and desktop window API v2
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Compose Multiplatform 1.12.0 ships with an experimental MCP server for AI coding agents in Compose Hot Reload, automatic Noto font fallback for web targets, and a v2 window and dialog API for desktop.
The MCP server lets an AI agent verify its own UI edits by triggering reloads, taking screenshots, inspecting the semantic tree, and reading logs from the running app, which closes the loop on automated UI changes. The web font fallback removes the need to manually bundle fonts for scripts like Japanese, Arabic, and Devanagari. The v2 desktop window API makes requested-versus-actual window state explicit and adds content-intrinsic sizing, multi-screen placement, and min/max constraints.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
Compose Hot Reload now includes an experimental MCP server that lets AI agents trigger reloads, take screenshots, inspect the semantic tree, simulate input, and read application logs.
Compose Multiplatform for web automatically downloads Noto font subsets on demand for characters not covered by the app's bundled fonts.
An experimental v2 API for WindowState and DialogState in androidx.compose.ui.window.v2 adds screen selection, intrinsic-size-based sizing, min/max constraints, and dialog positioning relative to parent windows.
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