v0.1.1 - Initial implementation of Markleon VSCode extension

Status: Completed
Date: 2026-07-07

Goal

Build a VSCode extension that provides live, server-less markdown preview with toggleable blog-provider rendering flavors (Zenn and Qiita). Both providers use markdown-it with custom plugins and inline CSS for a lightweight, fast bundle.

Summary of Changes

• VSCode extension scaffold: package.json manifest, tsconfig, esbuild bundler, launch config
• Provider interface and registry pattern for extensible markdown renderers
• Zenn provider: markdown-it with :::message, :::message alert, :::details Title, lang:filename code blocks
• Qiita provider: markdown-it with :::note info/warn/alert, lang:filename code blocks
• WebviewPanel manager with toolbar dropdown for provider switching
• Debounced live preview on text change with last-editor tracking for focus resilience
• Insert Note Block command that adapts to active provider
• Inline CSS with var(--vscode-*) for theme awareness
• 264KB bundle (no heavy dependencies like shiki/cheerio/sanitize-html)

Files Modified

• src/extension.ts - Extension entry point, registers 3 commands
• src/types.ts - Provider interface and message types
• src/providers/zenn.ts - Zenn markdown renderer with inline CSS
• src/providers/qiita.ts - Qiita markdown renderer with inline CSS
• src/providers/registry.ts - Provider registry
• src/webview/panel-manager.ts - WebviewPanel lifecycle and content updates
• src/webview/html-template.ts - Webview HTML with CSP, toolbar, message handling
• src/commands/insert-note.ts - Insert Note Block command
• src/util/debounce.ts - Debounce utility

Breaking Changes

None (initial implementation)

Deprecations

None