Add SessionStart hook for welcome message and restart guidance

- Add on-session-start.sh that detects Warp terminal and shows appropriate message
- Add SessionStart hook to hooks.json
- Update README with restart requirement note
- Bump version to 1.1.0

Co-Authored-By: Warp <agent@warp.dev>

Author: zachlloyd

.claude-plugin/marketplace.json

@@ -10,7 +10,7 @@
       "name": "warp",
       "description": "Native Warp notifications when Claude completes tasks or needs input",
       "source": "./plugins/warp",
-      "version": "1.0.0",
+      "version": "1.1.0",
       "category": "productivity",
       "tags": ["notifications", "terminal", "warp"]
     }

README.md

@@ -27,7 +27,9 @@ Notifications appear in Warp's notification center and as system notifications,
 /plugin install warp@claude-code-warp
 ```
 
-That's it! Notifications will appear automatically when Claude completes tasks.
+> ⚠️ **Important**: After installing, **restart Claude Code** for notifications to activate.
+
+Once restarted, you'll see a confirmation message and notifications will appear automatically when Claude completes tasks.
 
 ## Requirements
 
@@ -43,7 +45,8 @@ This plugin uses Warp's [pluggable notifications](https://docs.warp.dev/features
 2. Formats a concise notification message
 3. Sends an OSC 777 escape sequence to Warp, which displays a native notification
 
-The plugin registers two hooks:
+The plugin registers three hooks:
+- **SessionStart** — shows a welcome message confirming the plugin is active
 - **Stop** — fires when Claude finishes responding
 - **Notification** — fires when Claude needs user input
 

plugins/warp/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "warp",
   "description": "Warp terminal integration for Claude Code - native notifications, and more to come",
-  "version": "1.0.1",
+  "version": "1.1.0",
   "author": {
     "name": "Warp",
     "url": "https://warp.dev"

plugins/warp/hooks/hooks.json

@@ -1,6 +1,17 @@
 {
   "description": "Warp terminal notifications",
   "hooks": {
+    "SessionStart": [
+      {
+        "matcher": "startup",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "${CLAUDE_PLUGIN_ROOT}/scripts/on-session-start.sh"
+          }
+        ]
+      }
+    ],
     "Stop": [
       {
         "hooks": [

plugins/warp/scripts/on-session-start.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# Hook script for Claude Code SessionStart event
+# Shows welcome message and Warp detection status
+
+# Check if running in Warp terminal
+if [ "$TERM_PROGRAM" = "WarpTerminal" ]; then
+    # Running in Warp - notifications will work
+    cat << 'EOF'
+{
+  "systemMessage": "🔔 Warp plugin active. You'll receive native Warp notifications when tasks complete or input is needed."
+}
+EOF
+else
+    # Not running in Warp - suggest installing
+    cat << 'EOF'
+{
+  "systemMessage": "ℹ️ Warp plugin installed but you're not running in Warp terminal. Install Warp (https://warp.dev) to get native notifications when Claude completes tasks or needs input."
+}
+EOF
+fi