feat: auto-copy slash command files on plugin initialization

README.md

@@ -40,15 +40,8 @@ Add the plugin to your `opencode.json`:
 }
 ```
 
-> [!CAUTION]
-> **One-time setup required**: OpenCode does not execute npm postinstall scripts.
-> Run this command once after initial installation to enable slash commands:
->
-> ```bash
-> cd ~/.cache/opencode/node_modules/opencode-agent-modes && node dist/postinstall.js
-> ```
-
-The following command files are copied to `~/.config/opencode/command/`:
+The following command files are automatically copied to
+`~/.config/opencode/command/` when the plugin initializes:
 
 - `mode-performance.md`
 - `mode-economy.md`

package.json

@@ -1,6 +1,6 @@
 {
   "name": "opencode-agent-modes",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "OpenCode plugin to switch agent modes between performance and economy presets",
   "module": "src/index.ts",
   "main": "dist/index.js",
@@ -24,14 +24,13 @@
   },
   "scripts": {
     "typecheck": "tsc --noEmit",
-    "build": "bun build src/index.ts --outdir dist --format esm && bun build scripts/postinstall.ts --outdir dist --format esm --target node && tsc -p tsconfig.build.json",
+    "build": "bun build src/index.ts --outdir dist --format esm --target bun && tsc -p tsconfig.build.json",
     "lint": "bunx biome check src/",
     "format": "prettier --write 'src/**/*.ts'",
     "format:check": "prettier --check 'src/**/*.ts'",
     "test": "bun test",
     "test:watch": "bun test --watch",
     "test:coverage": "bun test --coverage",
-    "postinstall": "node dist/postinstall.js",
     "prepublishOnly": "bun run build"
   },
   "keywords": [

src/config/command-installer.ts

@@ -0,0 +1,55 @@
+import { copyFileSync, mkdirSync, readdirSync, existsSync } from "node:fs";
+import { homedir } from "node:os";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+/**
+ * Target directory for OpenCode command files
+ */
+const COMMANDS_DEST = join(homedir(), ".config", "opencode", "command");
+
+/**
+ * Copies slash command markdown files to OpenCode's command directory.
+ *
+ * This function is called during plugin initialization to ensure
+ * command files are available without manual postinstall execution.
+ *
+ * @returns Number of files copied, or -1 if source directory not found
+ */
+export function copyCommandFiles(): number {
+  // Resolve the commands directory relative to this file
+  // In dist: dist/config/command-installer.js -> dist/../commands = commands/
+  const __dirname = dirname(fileURLToPath(import.meta.url));
+  const commandsSrc = join(__dirname, "..", "..", "commands");
+
+  // Skip if commands directory doesn't exist (shouldn't happen in production)
+  if (!existsSync(commandsSrc)) {
+    console.warn(
+      "[agent-mode-switcher] Commands directory not found:",
+      commandsSrc
+    );
+    return -1;
+  }
+
+  try {
+    // Ensure destination directory exists
+    mkdirSync(COMMANDS_DEST, { recursive: true });
+
+    // Find all markdown files in the commands directory
+    const files = readdirSync(commandsSrc).filter((f) => f.endsWith(".md"));
+
+    // Copy each command file to the OpenCode config directory
+    for (const file of files) {
+      copyFileSync(join(commandsSrc, file), join(COMMANDS_DEST, file));
+    }
+
+    return files.length;
+  } catch (error) {
+    // Non-fatal: log warning but don't block plugin initialization
+    console.warn(
+      "[agent-mode-switcher] Warning: Could not copy command files:",
+      error instanceof Error ? error.message : String(error)
+    );
+    return -1;
+  }
+}

src/config/index.ts

@@ -1,3 +1,4 @@
 export * from './types.ts'
 export * from './loader.ts'
 export * from './initializer.ts'
+export * from './command-installer.ts'

src/index.ts

@@ -1,6 +1,7 @@
 import { tool } from "@opencode-ai/plugin";
 import type { Plugin } from "@opencode-ai/plugin";
 import { ModeManager } from "./modes/index.ts";
+import { copyCommandFiles } from "./config/index.ts";
 
 /**
  * OpenCode Agent Mode Switcher Plugin
@@ -14,6 +15,8 @@ const modeSwitcherPlugin: Plugin = async ({ client }) => {
   // Initialize on startup with error handling
   try {
     await modeManager.initialize();
+    // Copy slash command files to ~/.config/opencode/command/
+    copyCommandFiles();
   } catch (error) {
     // Log error but don't block opencode startup
     console.error(