SourceCanvas 1.6 - Added one-action setup for detected Qwen Code installations alongside the existing AI hosts. - Strengthened Visual Studio Code MCP setup with explicit install and trust confirmation, safe backups, configuration audit, and restore. - Added completely offline PlantUML preview, syntax highlighting, diagnostics, templates, and .puml/.plantuml/.iuml/.pu documents. - Added PlantUML to Agent Preview, all seven MCP tools, Resources, Prompts, inspection, and SVG/PDF/PNG export. - Added a single-file PlantUML security policy that blocks include/import directives and external images while retaining safe inline features. - Improved renderer cancellation, timeout recovery, rapid-revision handling, transparent backgrounds, and source-line errors. - Improved opening and drag and drop for every registered source format, including Graphviz .dot files when another app owns that extension. - Improved signed Agent Service startup and Connection Diagnostic reliability on macOS.

SourceCanvas 1.5 - Added local Graphviz DOT preview, diagnostics, .dot/.gv documents, templates, and SVG/PDF/PNG export. - Added the macOS MCP Agent with seven diagram tools, live AI Preview windows, Resources, Prompts, and explicit file authorization. - Added Configure Installed Agents for ChatGPT/Codex, Claude Desktop, Cursor, VS Code, and Gemini CLI while preserving existing MCP servers. - Refined adaptive source/preview layouts, draggable wide-screen panes, compact toolbars, preview scrolling, and localized feedback. - Added a privacy manifest for the local preferences and file metadata APIs used by the app.

SourceCanvas 1.3.1 update - Added secure remote resource controls. SVG previews block external resources by default to avoid unexpected network loads. - You can allow HTTPS and local HTTP images, fonts, stylesheets, and SVG references when a real SVG file needs them for a complete preview. - The preview now explains when remote resources are blocked, unsupported, or fail to load. - PNG/PDF export checks remote resource state first. If resources are blocked, fail, or time out, export stops with a clear message instead of producing an incomplete file. - Mermaid and core SVG rendering continue to run locally without a remote rendering service.

SourceCanvas 1.3 update - Unified the app name, icon, and default sample around SourceCanvas, with Mermaid included in the icon. - Refreshed iPhone with a three-row toolbar, icon-only Open and Save controls, and pinch zoom in the preview. - Removed the iPad left file/recent rail and improved the top command area and full bottom status. - Replaced Reset Zoom with Fit Screen. - Preview backgrounds now work for SVG and Mermaid, including paper, mist, and slate choices. - Export menu labels are now PNG 1x, PNG 2x, PNG 3x, and PDF. - Mermaid JavaScript exceptions now show friendly user feedback with debug code M01. - macOS no longer shows the visible Source Type label in the toolbar, and macOS/visionOS zoom buttons are cleaner.

Mermaid preview update - Added local Mermaid diagram preview. - Open .mmd and .mermaid files, or paste Mermaid source directly. - Added Auto, SVG, and Mermaid source modes. - Added Mermaid background color choices. - Improved zoom behavior so enlarged SVG and Mermaid previews can be inspected without clipping.

Version 1.1 adds a richer SVG code editing experience with improved syntax editing, a built-in app icon SVG sample on launch, better toolbar layout on iPhone portrait mode, and compatibility fixes for iOS and visionOS. This update also improves preview reliability and overall testing coverage.