OpenBone v0.4.0

Website

• openbone.io: documentation with guides, editor screenshots and live examples you can play (with sound after a tap).

Editor

• Activity panel (bottom dock): every edit with who made it (you, an AI agent over MCP, the editor), MCP connects and disconnects, files received from the MCP project folder, and errors, with filters (All, MCP, You, Errors). Repeats in a row are counted instead of listed, and the tab shows a badge for new entries.
• Connect an AI agent: the { } button next to Connect MCP (and ☰ Menu → Connect an AI agent) shows the MCP config JSON for Claude Desktop, Cursor and other clients, the claude mcp add command and the HTTP command, each with a Copy button. On desktop it can open the current project when the server starts.
• Update checker: ☰ Menu → Check for updates (and a button in About) asks GitHub for the latest release. When there is a newer one, an ⬆ Update button appears in the toolbar: on desktop it downloads the installer for your system (Windows .exe, macOS .dmg, Linux AppImage), on the web it opens the release notes. The desktop app also checks once a day.
• Play mode: a Sound row mutes or unmutes everything or one bus, like a page's controls would.
• Bool inputs can mute a bus ("Mutes sound" in the input's dialog): while the input is true, that bus (or all sound) is muted, whoever sets it (your app, page buttons, listeners, scripts); mute actions on that bus set the input too. Every runtime applies it (C++ with Godot, Swift and Flutter, C#, Java, Haxe), and the Windswept example uses it for its music and sound-effect buttons, so setInput("musicOff", true) from outside the artboard mutes the music.

Web player

• No AudioContext is created before the first click, tap or key press, so browsers don't warn about blocked audio.
• Sound controls outside the artboard: player.setBusMuted("music", true | false | "toggle"), toggleBus(bus), isBusMuted(bus), buses and setMuted(muted) on Player and <openbone-player>; OpenBone.setMuted / OpenBone.setBusMuted and the setMuted / setBusMuted bridge commands for WebView hosts. They stay in step with mute buttons inside the artboard. Exported demo pages get a mute button for all sound and for each bus.

Native runtimes

• Mute a bus from outside the artboard: Instance::setBusMuted / isBusMuted (C++), ob_instance_set_bus_muted / ob_instance_bus_muted (C API), SetBusMuted / IsBusMuted (C#), setBusMuted / isBusMuted (Java, Haxe, Swift, Dart).

MCP

• Live editing with sounds and images: projects the server saved keep relative paths to their art and sound, which the editor couldn't load (silent sounds, missing pictures, load errors). The bridge now sends those files to the editor, and again when they change on disk.
• add_input / update_input take mutes (a bus, "master" or "").

Install: desktop installers below (Windows .exe/.msi, macOS .dmg, Linux AppImage/.deb/.rpm). Packages: npm @openbone/*, pub.dev openbone, NuGet OpenBone.*, Maven Central io.openbone, Unity (upm branch), Godot addon zip, Swift Package Manager tag v0.4.0.