Sidebar Navigation
A persistent sidebar that scales as your app grows.
What it adds
A collapsible sidebar for primary navigation, with active state and a mobile drawer.
What your agent is told to do
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What your agent is told to do
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Group destinations into sections that reflect how users think, not how your routes are organized.
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Mark the active item clearly, including when the user is on a nested child route.
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Make it collapsible, and remember the collapsed state per user.
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On mobile it becomes a drawer, not a squeezed sidebar.
Edge cases it handles
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Edge cases it handles
5- Active state must match nested routes — /settings/billing should light up 'Settings'.
- Hide destinations the user lacks permission for; don't show a link that 403s.
- The mobile drawer must trap focus and close on Escape and on route change.
- A collapsed sidebar still needs labels — use tooltips, not mystery icons.
- Long lists of items must scroll inside the sidebar, not push the layout.
Definition of done
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Definition of done
7- Active state is correct on nested routes.
- The sidebar collapses and remembers that choice.
- Forbidden destinations are not rendered.
- The mobile drawer traps focus, closes on Escape, and closes on navigation.
- Collapsed icons still have accessible labels.
- The feature matches the existing design system.
- No existing functionality is broken.
Related features
Deep-Linkable Modals
Deep-Linkable Modals
Make dialogs and detail panels linkable without losing the page behind them.
What it does
Modals and detail panels that live at their own URL, so they can be shared, bookmarked, and closed with the back button.
How it works
- 1 Pick the overlays worth linking — record detail, edit forms, share dialogs — and give each one a real URL.
- 2 When that URL is opened directly, with no page underneath, render the content as a full page instead of an overlay floating on nothing.
- 3 Make the browser back button close the modal and leave the user on the page they were on, not two steps back.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/deep-linkable-modals
Tabs
Tabs
Split a crowded page into sections without another route.
What it does
Accessible tabbed sections, with the active tab reflected in the URL.
How it works
- 1 Use tabs for alternative views of the SAME thing. If the content is unrelated, it wants a separate page.
- 2 Put the active tab in the URL so a tab can be linked, bookmarked, and survives a refresh.
- 3 Implement the WAI-ARIA tabs pattern: arrow keys move between tabs, Tab moves into the panel.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/tabs
Previous and Next Record Navigation
Previous and Next Record Navigation
Move through a result set one record at a time without going back to the list.
What it does
Previous and next controls on a detail view that walk the same sequence the user's list produced.
How it works
- 1 Derive the sequence from the filter, sort, and search that were active on the originating list — not from the table's default ordering. A different order than the list the user came from is a bug, not a fallback.
- 2 Carry the sequence identity in the URL so the detail page is shareable and survives a refresh.
- 3 Disable the controls at genuine boundaries and make that state visible; do not fetch a page of results just to discover there is nothing after the last record.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/previous-and-next-record-navigation
How it works
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Copy the link
Grab the Markdown instruction URL for this feature.
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Give it to your AI
Paste it into Claude Code, Cursor, v0, Lovable — whatever you build with.
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It inspects, then implements
Your agent reads your existing app first, then adds the feature to fit it.
Works with your stack
These instructions are written to adapt. They tell the agent to detect your framework, match your existing design system, and reuse what you already have — rather than assuming a particular stack.
Need it tighter than that? Customize the feature and tell it exactly what you're running.