(ask fern) Add page on Ask Fern Slack app

fern/products/ask-fern/ask-fern.yml

@@ -25,6 +25,8 @@ navigation:
         path: ./pages/features/insights.mdx
       - page: Evaluation
         path: ./pages/features/evals.mdx
+      - page: Slack app
+        path: ./pages/features/slack-app.mdx
   - api: API reference
     api-name: fai
     paginated: true

fern/products/ask-fern/pages/features/slack-app.mdx

@@ -0,0 +1,91 @@
+---
+title: Ask Fern Slack app
+description: Enable your customers to get instant answers to product questions directly in Slack using Ask Fern's AI-powered documentation bot.
+---
+
+The Ask Fern Slack app allows customers to ask questions about your products directly in Slack channels and receive AI-generated answers from your documentation database.
+
+Fern stores all questions and answers from Slack interactions for [analytics purposes](/ask-fern/features/analytics).
+
+## Setup
+
+Install the Ask Fern app and add the bot to customer channels. 
+
+<AccordionGroup>
+<Accordion title="Install for your organization">
+
+To install Ask Fern in your organization's Slack workspace, you must be a Slack admin. Follow these steps:
+
+1. In your Fern dashboard, click the **Install to Slack** button. You'll be redirected to Slack to authorize the app 
+1. Select the workspace where you want to add Ask Fern and click **Allow**
+
+</Accordion>
+<Accordion title="Enable for customer workspaces">
+
+To give customers access to the Ask Fern bot in their own Slack workspaces:
+
+1. Generate a customer installation link by making a request to:
+   ```
+   https://fai.buildwithfern.com/slack/get-install?domain={your-domain}
+   ``` 
+   This returns a unique URL that your customers can use to install Ask Fern to their own Slack workspace.
+1. Forward this link to your customer so they can install the Ask Fern app to their workspace.
+1. Once the customer has installed the Ask Fern app, you must add the bot to your customer Slack channel to give it access.
+
+Once added, customers will see that `@Ask Fern was added to the channel`. They can start asking questions immediately.
+</Accordion>
+</AccordionGroup>
+
+## Configuration
+
+Customize the bot's behavior to match your workflow needs.
+
+<AccordionGroup>
+<Accordion title="Bot settings per channel">
+
+Use the `/configure` command in any channel to adjust the following settings:
+
+- **respond_to**: Controls whether the Ask Fern bot responds to all messages (`all`) or only when directly mentioned with `@Ask Fern` (`mentions_only`)
+- **roles**: Specifies which RBAC roles should be used to filter Ask Fern responses (if you have [role-based access control](/docs/authentication/rbac) configured)
+</Accordion>
+<Accordion title="Customize the bot name">
+
+You can rename the bot to match your brand (example: "YourCompanyName Support"):
+
+1. In Slack, go to **Apps** in the sidebar and click **Add Apps**
+2. Search for **Ask Fern** and select it
+3. Click the **About** tab, then **Configuration**
+4. Scroll to **Bot User** section and click **Edit**
+5. Enter your preferred bot name and save changes
+
+Now customers will see `@YourCompanyName Support was added to the channel` instead of the default `@Ask Fern` name.
+</Accordion>
+</AccordionGroup>
+
+## Architecture
+
+When a user asks Ask Fern a question in Slack, a webhook triggers Fern's servers to search your documentation database and retrieve relevant context. Using that context, Ask Fern generates a response.
+
+<Accordion title="Diagram">
+
+```mermaid
+sequenceDiagram
+  autonumber
+    participant U as User (Slack)
+    participant S as Slack Webhook
+    participant F as Fern Servers
+    participant V as Documentation Database
+    participant A as Ask Fern
+
+    U->>S: Ask question to @Ask Fern
+    S->>F: Webhook fires to Fern servers
+    F->>F: Convert query to vector
+    F->>F: Check user roles (if RBAC enabled)
+    F->>V: Search for relevant chunks
+    V->>F: Return matching documents user can access
+    F->>A: Send query + context
+    A->>A: Generate response
+    A->>U: Return answer in Slack thread
+    F->>F: Store question and answer for analytics
+```
+</Accordion>