> ## Documentation Index
> Fetch the complete documentation index at: https://help.thedouble.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# App Skills

App Skills connect your AI Double to external tools and services. They let your Double take actions—sending emails, creating calendar events, searching documents—based on what users ask for.

## What to know

* **App Skills are integrations.** They plug popular tools like Gmail, Google Calendar, and Calendly into your Double.
* **Your Double picks the right action.** You set allowed actions, and the AI autonomously chooses which one fits the user's intent.
* **Trigger phrases aren't always needed.** If you enable a skill, exact intent matching works too. Add trigger phrases to be more specific.
* **Custom instructions shape behavior.** Tell the AI exactly how to handle the action—what fields to fill, how to format responses, when to ask for confirmation.

## Create an App Skill

1. Go to **Actions > Skills**.
2. Find the integration skill you want (Gmail, Google Calendar, Calendly, etc.).
3. Click **+ Add new** or select the skill card.
4. Pick which Double gets this skill.
5. Name the skill (e.g., "Email Assistant" or "Meeting Scheduler").
6. Add trigger phrases (optional). Use 3+ words per phrase. Examples: "send me an email" or "schedule a meeting."
7. Pick allowed actions. These are the specific operations your Double can do (e.g., "Send Email," "Create Event," "Check Availability").
8. Connect your account. Click the blue **Sign in** button to authenticate with Gmail, Google Calendar, or Calendly.
9. Set timezone (if applicable). Defaults to Asia/Kolkata—change if needed.
10. Add custom instructions (optional). Tell the AI how to handle requests. Example: "Always ask the user to confirm before sending an email."
11. Click **Create Skill**.

## Understanding the options

**Allowed Actions**

* These are the capabilities the AI can use. Not every action needs to be enabled.
* Gmail: Send Email (dynamic or static templates), Read threads, Search threads, Label threads.
* Google Calendar: Create Event, Check Availability, Get Event Details, Update Event, Cancel Event.
* Calendly: Schedule meetings, check available slots, get meeting details, cancel bookings.
* Each action type is labeled: WRITE, READ, or DELETE.

**Dynamic vs. Static (Gmail)**

* **Dynamic email:** The AI generates the subject, body, and recipients based on the conversation.
* **Static email:** You write a template. The AI fills in details you specify.
* Dynamic is more flexible; static is more controlled.

**Custom Instructions**

* Optional but powerful. Write exactly what you want the AI to do.
* Example for Gmail: "Follow up with professional tone. Always include a closing line."
* Example for Calendar: "Suggest 30-minute slots by default unless the user asks otherwise."
* Missing static fields will be generated by the AI based on your instructions.

**Account Connection**

* Your credentials are encrypted and can be removed anytime.
* One account per skill (you can't have multiple Gmail accounts for one skill).
* If you need different accounts, create separate skills.

**Timezone**

* Affects how the AI interprets times in conversation.
* Also used for availability windows (when your Double can schedule meetings).

## Availability Window (Calendar Skills)

Set your bookable hours and days when using Google Calendar or Calendly skills.

1. Toggle **Availability Window** on.
2. Set the time range (From/To).
3. Pick available days (Sunday through Saturday).
4. Set the meeting slot duration (default is 15 minutes).

The AI will only suggest times within these windows.

## Next steps

* [Workflow Builder](https://claude.ai/help/workflow-builder) — Chain multiple actions together