diff --git a/src/utils/websearch-manager.ts b/src/utils/websearch-manager.ts
index ad1f0777..88a916b5 100644
--- a/src/utils/websearch-manager.ts
+++ b/src/utils/websearch-manager.ts
@@ -60,6 +60,9 @@ export {
   displayWebSearchStatus,
 } from './websearch/status';
 
+// Re-export profile hook injection
+export { ensureProfileHooks, removeMigrationMarker } from './websearch/profile-hook-injector';
+
 // Import for local use
 import { clearGeminiCliCache, clearGrokCliCache, clearOpenCodeCliCache } from './websearch';
 
diff --git a/src/utils/websearch/index.ts b/src/utils/websearch/index.ts
index b9a9dfa4..4bcfd134 100644
--- a/src/utils/websearch/index.ts
+++ b/src/utils/websearch/index.ts
@@ -55,3 +55,6 @@ export {
   getWebSearchReadiness,
   displayWebSearchStatus,
 } from './status';
+
+// Profile Hook Injection
+export { ensureProfileHooks, removeMigrationMarker } from './profile-hook-injector';
diff --git a/src/utils/websearch/profile-hook-injector.ts b/src/utils/websearch/profile-hook-injector.ts
new file mode 100644
index 00000000..7742b9f3
--- /dev/null
+++ b/src/utils/websearch/profile-hook-injector.ts
@@ -0,0 +1,202 @@
+/**
+ * Profile Hook Injector
+ *
+ * Injects WebSearch hooks into per-profile settings files.
+ * This replaces the global ~/.claude/settings.json approach.
+ *
+ * @module utils/websearch/profile-hook-injector
+ */
+
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+import { info, warn } from '../ui';
+import { getWebSearchHookConfig, getHookPath } from './hook-config';
+import { getWebSearchConfig } from '../../config/unified-config-loader';
+import { removeHookConfig } from './hook-config';
+
+// CCS directory
+const CCS_DIR = path.join(os.homedir(), '.ccs');
+
+// Migration marker file
+const MIGRATION_MARKER = path.join(CCS_DIR, '.hook-migrated');
+
+/**
+ * Check if CCS WebSearch hook exists in settings
+ */
+function hasCcsHook(settings: Record<string, unknown>): boolean {
+  const hooks = settings.hooks as Record<string, unknown[]> | undefined;
+  if (!hooks?.PreToolUse) return false;
+
+  return hooks.PreToolUse.some((h: unknown) => {
+    const hook = h as Record<string, unknown>;
+    if (hook.matcher !== 'WebSearch') return false;
+
+    const hookArray = hook.hooks as Array<Record<string, unknown>> | undefined;
+    if (!hookArray?.[0]?.command) return false;
+
+    const command = hookArray[0].command as string;
+    return command.includes('.ccs/hooks/websearch-transformer');
+  });
+}
+
+/**
+ * Migrate CCS hook from global settings to profile settings (one-time)
+ */
+function migrateGlobalHook(): void {
+  if (fs.existsSync(MIGRATION_MARKER)) {
+    return; // Already migrated
+  }
+
+  try {
+    const removed = removeHookConfig();
+    if (removed && process.env.CCS_DEBUG) {
+      console.error(info('Migrated WebSearch hook from global settings'));
+    }
+    // Create marker file
+    fs.writeFileSync(MIGRATION_MARKER, new Date().toISOString(), 'utf8');
+  } catch (error) {
+    if (process.env.CCS_DEBUG) {
+      console.error(warn(`Migration failed: ${(error as Error).message}`));
+    }
+  }
+}
+
+/**
+ * Ensure WebSearch hook is configured in profile's settings file
+ *
+ * @param profileName - Name of the profile (e.g., 'agy', 'gemini', 'glm')
+ * @returns true if hook is configured (existing or newly added)
+ */
+export function ensureProfileHooks(profileName: string): boolean {
+  try {
+    const wsConfig = getWebSearchConfig();
+
+    // Skip if WebSearch is disabled
+    if (!wsConfig.enabled) {
+      return false;
+    }
+
+    // One-time migration from global settings
+    migrateGlobalHook();
+
+    const settingsPath = path.join(CCS_DIR, `${profileName}.settings.json`);
+
+    // Read existing settings or create empty
+    let settings: Record<string, unknown> = {};
+    if (fs.existsSync(settingsPath)) {
+      try {
+        const content = fs.readFileSync(settingsPath, 'utf8');
+        settings = JSON.parse(content);
+      } catch {
+        if (process.env.CCS_DEBUG) {
+          console.error(warn(`Malformed ${profileName}.settings.json - creating fresh hooks`));
+        }
+        // Continue with empty settings, will add hooks
+      }
+    }
+
+    // Check if CCS hook already present
+    if (hasCcsHook(settings)) {
+      // Update timeout if needed
+      return updateHookTimeoutIfNeeded(settings, settingsPath);
+    }
+
+    // Get hook config
+    const hookConfig = getWebSearchHookConfig();
+
+    // Ensure hooks structure exists
+    if (!settings.hooks) {
+      settings.hooks = {};
+    }
+
+    const settingsHooks = settings.hooks as Record<string, unknown[]>;
+    if (!settingsHooks.PreToolUse) {
+      settingsHooks.PreToolUse = [];
+    }
+
+    // Add CCS hook
+    const preToolUseHooks = hookConfig.PreToolUse as unknown[];
+    settingsHooks.PreToolUse.push(...preToolUseHooks);
+
+    // Write updated settings
+    fs.writeFileSync(settingsPath, JSON.stringify(settings, null, 2), 'utf8');
+
+    if (process.env.CCS_DEBUG) {
+      console.error(info(`Added WebSearch hook to ${profileName}.settings.json`));
+    }
+
+    return true;
+  } catch (error) {
+    if (process.env.CCS_DEBUG) {
+      console.error(warn(`Failed to inject hook: ${(error as Error).message}`));
+    }
+    return false;
+  }
+}
+
+/**
+ * Update hook timeout if it differs from current config
+ */
+function updateHookTimeoutIfNeeded(
+  settings: Record<string, unknown>,
+  settingsPath: string
+): boolean {
+  try {
+    const hooks = settings.hooks as Record<string, unknown[]>;
+    const hookConfig = getWebSearchHookConfig();
+    const expectedHookPath = getHookPath();
+    const expectedCommand = `node "${expectedHookPath}"`;
+    const expectedHooks = (hookConfig.PreToolUse as Array<Record<string, unknown>>)[0]
+      .hooks as Array<Record<string, unknown>>;
+    const expectedTimeout = expectedHooks[0].timeout as number;
+
+    let needsUpdate = false;
+
+    for (const h of hooks.PreToolUse) {
+      const hook = h as Record<string, unknown>;
+      if (hook.matcher !== 'WebSearch') continue;
+
+      const hookArray = hook.hooks as Array<Record<string, unknown>>;
+      if (!hookArray?.[0]?.command) continue;
+
+      const command = hookArray[0].command as string;
+      if (!command.includes('.ccs/hooks/websearch-transformer')) continue;
+
+      // Found CCS hook - check if needs update
+      if (hookArray[0].command !== expectedCommand) {
+        hookArray[0].command = expectedCommand;
+        needsUpdate = true;
+      }
+
+      if (hookArray[0].timeout !== expectedTimeout) {
+        hookArray[0].timeout = expectedTimeout;
+        needsUpdate = true;
+      }
+    }
+
+    if (needsUpdate) {
+      fs.writeFileSync(settingsPath, JSON.stringify(settings, null, 2), 'utf8');
+      if (process.env.CCS_DEBUG) {
+        console.error(info('Updated WebSearch hook timeout in profile settings'));
+      }
+    }
+
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Remove migration marker (called during uninstall)
+ */
+export function removeMigrationMarker(): void {
+  try {
+    if (fs.existsSync(MIGRATION_MARKER)) {
+      fs.unlinkSync(MIGRATION_MARKER);
+    }
+  } catch {
+    // Ignore errors
+  }
+}