docs: add Stack & Tools documentation

docs/squads/creating-your-squad.md

@@ -52,4 +52,17 @@ When creating a Squad, select the desired visibility:
 
 Public Squads must select a category during setup. Categories like Web, Mobile, AI, and Fun help users discover Squads that align with their interests.
 
+## Squad Stack & Tools
+
+Squads can showcase the technologies, frameworks, and tools that are central to the community. This helps potential members quickly understand what technologies the Squad focuses on.
+
+Squad admins can manage the Squad's stack from the Squad settings:
+
+1. Go to your **Squad page**
+2. Open **Squad settings**
+3. Find the **Stack & Tools** section
+4. Add technologies relevant to your Squad's focus
+
+For example, a React Squad might add React, TypeScript, and Next.js to their stack, while a DevOps Squad might showcase Kubernetes, Terraform, and AWS.
+
 For additional guidance, see our Squad moderation documentation.

docs/your-profile/stack-and-tools.md

@@ -0,0 +1,65 @@
+---
+sidebar_position: 2
+description: "Showcase your tech stack on daily.dev — the programming languages, frameworks, tools, and technologies you use. Build your developer identity and help others discover your expertise."
+---
+
+# Stack & Tools
+
+{/* TODO: Add screenshot of Stack & Tools section on profile */}
+
+Your Stack & Tools section lets you showcase the technologies, frameworks, languages, and tools you work with. It's a quick way for other developers — and potential employers — to understand your technical background and expertise.
+
+## Why Add Your Stack?
+
+- **Build your developer identity** — Show what technologies define your work
+- **Help others find you** — Developers with similar stacks can discover and connect with you
+- **Stand out to recruiters** — When recruiters view your profile through [Career Mode](../career-mode/overview.md), your stack helps them quickly understand your technical expertise
+- **Share your journey** — Track when you started using each technology
+
+## Adding Items to Your Stack
+
+1. Go to your **profile page**
+2. Find the **Stack & Tools** section
+3. Click the **Add** button
+4. Start typing the name of a technology, tool, or skill
+5. Select from suggestions or add a custom entry
+6. Choose a **section** to organize it
+7. Optionally set **Using since** to show how long you've been using it
+8. Click **Add to stack**
+
+:::tip
+As you type, you'll see suggestions from our database of known tools and technologies. Selecting a suggestion adds the official icon automatically.
+:::
+
+## Sections
+
+Organize your stack into sections that reflect how you use each technology:
+
+| Section | Use for |
+|---------|---------|
+| **Primary** | Your main, day-to-day technologies |
+| **Hobby** | Technologies you use for personal projects |
+| **Learning** | Technologies you're currently learning |
+| **Past** | Technologies you've used before but moved on from |
+| **Custom** | Create your own section name |
+
+## Editing and Removing Items
+
+Hover over any stack item to reveal edit and delete options:
+
+- **Edit** — Change the section or "Using since" date
+- **Delete** — Remove the item from your stack
+
+:::note
+The technology name cannot be edited after adding. To change it, delete the item and add it again with the correct name.
+:::
+
+## Limits
+
+You can add up to **100 items** to your stack. This gives you plenty of room to showcase your full technical breadth while keeping profiles focused and meaningful.
+
+## Visibility
+
+Your Stack & Tools section is visible on your public profile. Anyone visiting your profile can see the technologies you've added, organized by section.
+
+If you haven't added any items yet, the section won't appear to visitors — only you'll see the prompt to add your first item.