feat: full plugin integration + cross-agent rules

hooks/ponytail-config.js

@@ -0,0 +1,57 @@
+#!/usr/bin/env node
+// ponytail — shared configuration resolver
+//
+// Resolution order for default mode:
+//   1. PONYTAIL_DEFAULT_MODE environment variable
+//   2. Config file defaultMode field:
+//      - $XDG_CONFIG_HOME/ponytail/config.json (any platform, if set)
+//      - ~/.config/ponytail/config.json (macOS / Linux fallback)
+//      - %APPDATA%\ponytail\config.json (Windows fallback)
+//   3. 'full'
+
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+const VALID_MODES = ['off', 'lite', 'full', 'ultra', 'review'];
+
+function getConfigDir() {
+  if (process.env.XDG_CONFIG_HOME) {
+    return path.join(process.env.XDG_CONFIG_HOME, 'ponytail');
+  }
+  if (process.platform === 'win32') {
+    return path.join(
+      process.env.APPDATA || path.join(os.homedir(), 'AppData', 'Roaming'),
+      'ponytail'
+    );
+  }
+  return path.join(os.homedir(), '.config', 'ponytail');
+}
+
+function getConfigPath() {
+  return path.join(getConfigDir(), 'config.json');
+}
+
+function getDefaultMode() {
+  // 1. Environment variable (highest priority)
+  const envMode = process.env.PONYTAIL_DEFAULT_MODE;
+  if (envMode && VALID_MODES.includes(envMode.toLowerCase())) {
+    return envMode.toLowerCase();
+  }
+
+  // 2. Config file
+  try {
+    const configPath = getConfigPath();
+    const config = JSON.parse(fs.readFileSync(configPath, 'utf8'));
+    if (config.defaultMode && VALID_MODES.includes(config.defaultMode.toLowerCase())) {
+      return config.defaultMode.toLowerCase();
+    }
+  } catch (e) {
+    // Config file doesn't exist or is invalid — fall through
+  }
+
+  // 3. Default
+  return 'full';
+}
+
+module.exports = { getDefaultMode, getConfigDir, getConfigPath, VALID_MODES };