feat/binary

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.26"
+
+      - name: Check formatting
+        run: |
+          diff=$(gofmt -l .)
+          if [ -n "$diff" ]; then
+            echo "Files not formatted:"
+            echo "$diff"
+            exit 1
+          fi
+
+      - name: Vet
+        run: go vet ./...
+
+      - name: Test
+        run: go test ./... -v

.github/workflows/release.yml

@@ -14,44 +14,40 @@ jobs:
       matrix:
         include:
           - runner: ubuntu-latest
-            target: x86_64-unknown-linux-gnu
+            goos: linux
+            goarch: amd64
             asset: live-markdown-linux-x64
           - runner: ubuntu-latest
-            target: aarch64-unknown-linux-gnu
+            goos: linux
+            goarch: arm64
             asset: live-markdown-linux-arm64
           - runner: macos-latest
-            target: x86_64-apple-darwin
+            goos: darwin
+            goarch: amd64
             asset: live-markdown-darwin-x64
           - runner: macos-latest
-            target: aarch64-apple-darwin
+            goos: darwin
+            goarch: arm64
             asset: live-markdown-darwin-arm64
           - runner: ubuntu-latest
-            target: x86_64-pc-windows-msvc
+            goos: windows
+            goarch: amd64
             asset: live-markdown-windows-x64.exe
 
     runs-on: ${{ matrix.runner }}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
 
-      - uses: denoland/setup-deno@v2
+      - uses: actions/setup-go@v5
         with:
-          deno-version: v2.x
-
-      - name: Download vendored assets
-        working-directory: server
-        run: deno task setup
+          go-version: "1.26"
 
-      - name: Compile binary
-        working-directory: server
-        run: >
-          deno compile
-          --allow-net=localhost
-          --allow-read
-          --include ../client/
-          --target ${{ matrix.target }}
-          --output ../bin/${{ matrix.asset }}
-          src/main.ts
+      - name: Build binary
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+        run: go build -ldflags="-s -w" -o bin/${{ matrix.asset }} ./cmd/live-markdown
 
       - name: Upload release asset
         uses: softprops/action-gh-release@v2
@@ -68,4 +64,3 @@ jobs:
         uses: softprops/action-gh-release@v2
         with:
           generate_release_notes: true
-

.gitignore

@@ -1,11 +1,15 @@
 # Build output
 bin/
 
-# Vendored assets (downloaded at build time)
-client/vendor/
-
-# Dependencies
-node_modules/
+# Go
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+vendor/
 
 # OS
 .DS_Store

.tool-versions

@@ -0,0 +1 @@
+golang 1.26.1

CLAUDE.md

@@ -40,12 +40,14 @@ Read before implementing:
 ## Tech Stack
 
 - **Neovim plugin**: Lua (no external dependencies)
-- **Preview server**: Deno (TypeScript)
-- **Markdown parser**: markdown-it (server-side rendering)
-- **CSS**: github-markdown-css (loaded from CDN)
-- **Diagrams**: mermaid.js (downloaded at build time from CDN, rendered client-side)
+- **Preview server**: Go (single binary, `go:embed` for all assets)
+- **Markdown parser**: goldmark + GFM extension (server-side rendering)
+- **Syntax highlighting**: chroma (server-side, CSS class-based)
+- **Math rendering**: KaTeX (client-side via auto-render)
+- **CSS**: github-markdown-css (bundled in `static/`)
+- **Diagrams**: mermaid.js (bundled in `static/`, rendered client-side)
 - **Communication**: Neovim <-> Server via stdin/stdout (JSON Lines), Server <-> Browser via WebSocket
-- **Distribution**: `deno compile` single binary -> GitHub Releases (users do not need Deno)
+- **Distribution**: Go cross-compile single binary -> GitHub Releases
 
 ## Implementation Rules
 
@@ -72,10 +74,26 @@ Read before implementing:
 
 - **Neovim <-> Server communication**: stdin/stdout JSON Lines (not WebSocket)
 - **mermaid rendering**: Client-side (`mermaid.run()` in the browser, not server-side)
-- **mermaid distribution**: Downloaded from CDN at build time to `client/vendor/mermaid.min.js`, served as `/vendor/mermaid.min.js`
-- **github-markdown-css**: Loaded from CDN (cdnjs), not bundled
-- **Scroll sync**: `data-source-line` attribute + `scrollIntoView()`
-- **Fence rule**: Special handling to inject `data-source-line` on `<pre>` tags while preserving class attributes
+- **KaTeX rendering**: Client-side (`renderMathInElement()` in the browser)
+- **Static assets**: All bundled in `static/` and committed to git (no CDN, no build-time downloads)
+- **Scroll sync**: `data-source-line` attribute via goldmark AST transformer + `scrollIntoView()`
+- **Image paths**: Server rewrites relative src to `/_local/<absolute-path>`, served from local filesystem
 - **Browser launch**: Presets + arbitrary command strings executed directly
 - **Initial connection**: Server caches last rendered HTML, sends immediately on WebSocket connect
 - **Server shutdown**: Sends `close` message to browser, attempts `window.close()`
+
+## Project Structure
+
+```
+cmd/live-markdown/main.go    # Go server entry point
+internal/                     # Go server internals
+  message/types.go            # JSON Lines message types
+  jsonlines/                  # stdin/stdout reader/writer
+  markdown/renderer.go        # goldmark pipeline + source-line + image rewrite
+  server/server.go            # HTTP + WebSocket server
+assets.go                     # go:embed directives
+static/                       # Bundled assets (CSS, fonts, JS)
+client/                       # Browser client (index.html, preview.js)
+lua/live-markdown/            # Neovim plugin (Lua)
+scripts/install.sh            # Binary installer from GitHub Releases
+```

README.md

@@ -14,7 +14,7 @@
 
 ## Features
 
-- Single binary — no runtime dependencies (Deno not required)
+- Single binary — no runtime dependencies
 - Real-time preview with scroll sync
 - Syntax highlighting (light/dark auto-switch)
 - Math rendering (KaTeX)
@@ -72,7 +72,7 @@ require("live-markdown").setup({
   server = {
     port = 0,            -- 0 = OS auto-assigns
     host = "localhost",
-    binary = nil,        -- path to compiled binary (nil = use deno run)
+    binary = nil,        -- path to compiled binary (nil = auto-detect bin/live-markdown)
   },
   browser = {
     strategy = "auto",   -- "auto" | "open" | "xdg-open" | custom command

assets.go

@@ -0,0 +1,9 @@
+package livemarkdown
+
+import "embed"
+
+//go:embed client/*
+var ClientFS embed.FS
+
+//go:embed static/css/* static/fonts/* static/js/katex.min.js static/js/mermaid.min.js static/js/contrib/auto-render.min.js
+var StaticFS embed.FS

client/index.html

@@ -6,14 +6,14 @@
   <title>live-markdown preview</title>
 
   <!-- github-markdown-css: auto light/dark theme -->
-  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.8.1/github-markdown.min.css">
+  <link rel="stylesheet" href="/css/github-markdown.min.css">
 
-  <!-- highlight.js: syntax highlighting (light/dark auto-switch) -->
-  <link rel="stylesheet" media="(prefers-color-scheme: light)" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/styles/github.min.css">
-  <link rel="stylesheet" media="(prefers-color-scheme: dark)" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/styles/github-dark.min.css">
+  <!-- syntax highlighting: light/dark auto-switch -->
+  <link rel="stylesheet" media="(prefers-color-scheme: light)" href="/css/chroma-github.css">
+  <link rel="stylesheet" media="(prefers-color-scheme: dark)" href="/css/chroma-github-dark.css">
 
   <!-- KaTeX: math rendering -->
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.43/dist/katex.min.css">
+  <link rel="stylesheet" href="/css/katex.min.css">
 
   <style>
     body {
@@ -39,8 +39,10 @@
 </head>
 <body class="markdown-body">
   <div id="content"><p class="connecting">Connecting...</p></div>
-  <script src="/vendor/mermaid.min.js"></script>
+  <script src="/js/mermaid.min.js"></script>
   <script>mermaid.initialize({ startOnLoad: false, theme: "default" });</script>
+  <script src="/js/katex.min.js"></script>
+  <script src="/js/contrib/auto-render.min.js"></script>
   <script src="/preview.js"></script>
 </body>
 </html>

client/preview.js

@@ -10,6 +10,20 @@
   let reconnectDelay = 1000;
   let closed = false; // explicitly closed by server
 
+  // --- KaTeX math rendering ---
+
+  function renderMath() {
+    if (typeof renderMathInElement === "function") {
+      renderMathInElement(contentEl, {
+        delimiters: [
+          { left: "$$", right: "$$", display: true },
+          { left: "$", right: "$", display: false },
+        ],
+        throwOnError: false,
+      });
+    }
+  }
+
   // --- Mermaid rendering ---
 
   let mermaidCounter = 0;
@@ -90,6 +104,7 @@
       switch (msg.type) {
         case "render":
           contentEl.innerHTML = msg.html;
+          renderMath();
           renderMermaidBlocks();
           break;
         case "scroll":

cmd/live-markdown/main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"context"
+	"os"
+
+	livemarkdown "github.com/bun913/live-markdown.nvim"
+	"github.com/bun913/live-markdown.nvim/internal/jsonlines"
+	"github.com/bun913/live-markdown.nvim/internal/message"
+	"github.com/bun913/live-markdown.nvim/internal/server"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	nvimOut := jsonlines.NewWriter(os.Stdout)
+
+	srv := server.New(livemarkdown.ClientFS, livemarkdown.StaticFS, nvimOut)
+
+	port, err := srv.ListenAndServe(ctx)
+	if err != nil {
+		os.Exit(1)
+	}
+
+	// Notify Neovim of the assigned port
+	nvimOut.Write(message.ServerMessage{Type: "ready", Port: port})
+
+	// Read stdin (JSON Lines) — exits on EOF (defense line 2)
+	msgCh := make(chan message.NvimMessage, 16)
+	go jsonlines.ReadStdin(os.Stdin, msgCh)
+
+	for msg := range msgCh {
+		if srv.HandleNvimMessage(msg) {
+			break
+		}
+	}
+
+	// stdin closed or close message received — shut down
+	srv.Shutdown()
+	os.Exit(0)
+}

docs/README.ja.md

@@ -12,7 +12,7 @@
 
 ## 特徴
 
-- シングルバイナリ — ランタイム依存なし（Deno のインストール不要）
+- シングルバイナリ — ランタイム依存なし
 - リアルタイムプレビュー + スクロール同期
 - シンタックスハイライト（ライト/ダーク自動切替）
 - 数式レンダリング（KaTeX）
@@ -70,7 +70,7 @@ require("live-markdown").setup({
   server = {
     port = 0,            -- 0 = OS が自動割り当て
     host = "localhost",
-    binary = nil,        -- コンパイル済みバイナリのパス（nil = deno run を使用）
+    binary = nil,        -- コンパイル済みバイナリのパス（nil = bin/live-markdown を自動検出）
   },
   browser = {
     strategy = "auto",   -- "auto" | "open" | "xdg-open" | 任意のコマンド