diff --git a/.claude/settings.json b/.claude/settings.json
index a63b4a04a775..3cd2d1b82934 100644
--- a/.claude/settings.json
+++ b/.claude/settings.json
@@ -52,7 +52,9 @@
             "mcp__sentry__search_events",
             "mcp__sentry__search_issue_events",
             "mcp__sentry__search_issues",
-            "mcp__sentry__whoami"
+            "mcp__sentry__whoami",
+            "Bash(agent-device *)",
+            "Bash(echo \"$(npm root -g)/agent-device/skills/agent-device\")"
         ]
     },
     "enabledPlugins": {
diff --git a/.claude/skills/agent-device/SKILL.md b/.claude/skills/agent-device/SKILL.md
new file mode 100644
index 000000000000..b542aae75be5
--- /dev/null
+++ b/.claude/skills/agent-device/SKILL.md
@@ -0,0 +1,15 @@
+---
+name: agent-device
+description: Drive iOS and Android devices for the Expensify App - testing, debugging, performance profiling, bug reproduction, and feature verification. Use when the developer needs to interact with the mobile app on a device.
+allowed-tools: Bash(agent-device *) Bash(npm root *)
+---
+
+# agent-device
+
+## Pre-flight
+
+`agent-device` CLI version: !`agent-device --version 2>&1 || echo "NOT_INSTALLED"`
+
+Canonical skill reference path (read these files directly for device automation guidance - bootstrap, exploration, verification, debugging): !`echo "$(npm root -g)/agent-device/skills/agent-device"`
+
+> If the version line above shows `NOT_INSTALLED` or a command-not-found error, **STOP** and instruct the developer to install it: `npm install -g agent-device`. All device interaction depends on it.
diff --git a/.gitignore b/.gitignore
index 79175c075a16..6775d4e4fe81 100644
--- a/.gitignore
+++ b/.gitignore
@@ -162,5 +162,8 @@ modules/*/lib/
 .playwright-output/
 .playwright-mcp/
 
+# agent-device
+agent-device-output/
+
 # cspell cache
 .cspellcache
diff --git a/CLAUDE.md b/CLAUDE.md
index c6856a4da3a4..a4027066d5ee 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -278,6 +278,9 @@ npm run web
 ### Browser Testing
 Use the `/playwright-app-testing` skill to test and debug the App in a browser. Use this skill after making frontend changes to verify your work, or when the user requests testing.
 
+### Mobile Device Testing
+Use the `/agent-device` skill to drive the App on iOS and Android (simulators or real devices) for interactive testing, performance profiling, bug reproduction, and device-specific debugging. Requires `npm install -g agent-device` - the skill's pre-flight check will surface the install instruction if missing.
+
 ## Architecture Decisions
 
 ### React Native New Architecture
diff --git a/README.md b/README.md
index 3bc69752ef74..a46e1b31cc5a 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,8 @@ For detailed setup instructions for each platform, see the following guides:
 * **📱 iOS Development**: [iOS Setup Instructions](contributingGuides/SETUP_IOS.md)  
 * **🤖 Android Development**: [Android Setup Instructions](contributingGuides/SETUP_ANDROID.md)
 
+**Optional AI-assisted mobile testing:** If you use Claude Code, the [`/agent-device` skill](.claude/skills/agent-device/SKILL.md) drives iOS and Android simulators or devices for interactive testing, debugging, and performance profiling. Requires `npm install -g agent-device`.
+
 ## General Troubleshooting
 1. If you are having issues with **_Getting Started_**, please reference [React Native's Documentation](https://reactnative.dev/docs/environment-setup)
 2. If you are running into CORS errors like (in the browser dev console)