fix: use bun-runner to find Bun on fresh install (#818)

On fresh installations, smart-install.js installs Bun to ~/.bun/bin/bun
but Bun isn't in PATH until terminal restart. Subsequent hooks fail
because they try to run `bun ...` directly.

This fix introduces bun-runner.js - a Node.js script that finds Bun
in common install locations (not just PATH) and runs commands with it.
All hooks now use `node bun-runner.js ...` instead of `bun ...`.

The bun-runner checks:
- PATH (via which/where)
- ~/.bun/bin/bun (default install location)
- /usr/local/bin/bun
- /opt/homebrew/bin/bun (macOS Homebrew)
- /home/linuxbrew/.linuxbrew/bin/bun (Linuxbrew)
- Windows: %LOCALAPPDATA%\bun or fallback paths

Fixes #818

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugin/hooks/hooks.json

@@ -19,12 +19,22 @@
         "hooks": [
           {
             "type": "command",
-            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/smart-install.js\" && bun \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" stop && bun \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code context",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/smart-install.js\"",
             "timeout": 300
           },
           {
             "type": "command",
-            "command": "bun \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code user-message",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" start",
+            "timeout": 60
+          },
+          {
+            "type": "command",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code context",
+            "timeout": 60
+          },
+          {
+            "type": "command",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code user-message",
             "timeout": 60
           }
         ]
@@ -35,7 +45,12 @@
         "hooks": [
           {
             "type": "command",
-            "command": "bun \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code session-init",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" start",
+            "timeout": 60
+          },
+          {
+            "type": "command",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code session-init",
             "timeout": 60
           }
         ]
@@ -47,8 +62,13 @@
         "hooks": [
           {
             "type": "command",
-            "command": "bun \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code observation",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" start",
-            "timeout": 30
+            "timeout": 60
+          },
+          {
+            "type": "command",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code observation",
+            "timeout": 120
           }
         ]
       }
@@ -58,7 +78,12 @@
         "hooks": [
           {
             "type": "command",
-            "command": "bun \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code summarize",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" start",
+            "timeout": 60
+          },
+          {
+            "type": "command",
+            "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" hook claude-code summarize",
             "timeout": 120
           }
         ]

plugin/scripts/bun-runner.js

@@ -0,0 +1,88 @@
+#!/usr/bin/env node
+/**
+ * Bun Runner - Finds and executes Bun even when not in PATH
+ *
+ * This script solves the fresh install problem where:
+ * 1. smart-install.js installs Bun to ~/.bun/bin/bun
+ * 2. But Bun isn't in PATH until terminal restart
+ * 3. Subsequent hooks fail because they can't find `bun`
+ *
+ * Usage: node bun-runner.js <script> [args...]
+ *
+ * Fixes #818: Worker fails to start on fresh install
+ */
+import { spawnSync, spawn } from 'child_process';
+import { existsSync } from 'fs';
+import { join } from 'path';
+import { homedir } from 'os';
+
+const IS_WINDOWS = process.platform === 'win32';
+
+/**
+ * Find Bun executable - checks PATH first, then common install locations
+ */
+function findBun() {
+  // Try PATH first
+  const pathCheck = spawnSync(IS_WINDOWS ? 'where' : 'which', ['bun'], {
+    encoding: 'utf-8',
+    stdio: ['pipe', 'pipe', 'pipe'],
+    shell: IS_WINDOWS
+  });
+
+  if (pathCheck.status === 0 && pathCheck.stdout.trim()) {
+    return 'bun'; // Found in PATH
+  }
+
+  // Check common installation paths (handles fresh installs before PATH reload)
+  // Windows: Bun installs to ~/.bun/bin/bun.exe (same as smart-install.js)
+  // Unix: Check default location plus common package manager paths
+  const bunPaths = IS_WINDOWS
+    ? [join(homedir(), '.bun', 'bin', 'bun.exe')]
+    : [
+        join(homedir(), '.bun', 'bin', 'bun'),
+        '/usr/local/bin/bun',
+        '/opt/homebrew/bin/bun',
+        '/home/linuxbrew/.linuxbrew/bin/bun'
+      ];
+
+  for (const bunPath of bunPaths) {
+    if (existsSync(bunPath)) {
+      return bunPath;
+    }
+  }
+
+  return null;
+}
+
+// Get args: node bun-runner.js <script> [args...]
+const args = process.argv.slice(2);
+
+if (args.length === 0) {
+  console.error('Usage: node bun-runner.js <script> [args...]');
+  process.exit(1);
+}
+
+const bunPath = findBun();
+
+if (!bunPath) {
+  console.error('Error: Bun not found. Please install Bun: https://bun.sh');
+  console.error('After installation, restart your terminal.');
+  process.exit(1);
+}
+
+// Spawn Bun with the provided script and args
+// Use spawn (not spawnSync) to properly handle stdio
+const child = spawn(bunPath, args, {
+  stdio: 'inherit',
+  shell: IS_WINDOWS,
+  env: process.env
+});
+
+child.on('error', (err) => {
+  console.error(`Failed to start Bun: ${err.message}`);
+  process.exit(1);
+});
+
+child.on('close', (code) => {
+  process.exit(code || 0);
+});