Sort Controls
Let users choose the order, and keep that order stable.
What it adds
Sortable columns and sort menus whose order is deterministic, shareable in the URL, and safe against injected field names.
What your agent is told to do
5
What your agent is told to do
5-
1
Define an explicit allowlist of sortable fields and map incoming sort parameters through it. Anything not on the list falls back to the default.
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2
Always append a unique tie-breaker, such as the primary key, to every sort. Without it, records with equal values reshuffle between pages and users see duplicates and gaps.
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3
Put the active sort field and direction in the URL so the view can be shared, bookmarked, and restored on back-navigation.
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4
Decide where nulls and blanks go and apply that decision everywhere — missing values should not silently land at whichever end the database prefers.
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5
Do NOT interpolate a client-supplied field or direction into a query. That is a direct injection path, and an allowlist costs nothing.
Edge cases it handles
6
Edge cases it handles
6- Text sorting must be case-insensitive and locale-aware, or lowercase entries pile up after uppercase ones.
- Numbers stored as strings sort as strings. Cast, or store them as numbers.
- Changing the sort must reset to page one; keeping the offset lands the user mid-list in a different order.
- A sort over a computed or joined value needs an index, or it will quietly become a full table scan.
- The active sort and direction must be exposed to assistive tech via aria-sort, not by an arrow glyph alone.
- The default sort must be explicit. 'Whatever the database returns' is not an order and will change.
Definition of done
8
Definition of done
8- Only allowlisted fields can be sorted; unknown values fall back to the default.
- Every sort includes a unique tie-breaker and paginates without repeats or gaps.
- Sort state is in the URL and restores on reload and back-navigation.
- Null and blank placement is consistent and documented.
- Changing sort returns to the first page.
- Sortable headers expose their state through aria-sort.
- The feature matches the existing design system.
- No existing functionality is broken.
Related features
Global Search
Global Search
One search box that finds anything in your app.
What it does
Search across every meaningful entity in the application from a single input.
How it works
- 1 Identify every entity worth searching, and report them before building.
- 2 Use the database's own search capability first (for example Postgres full-text search). Do not add Elasticsearch or a search SaaS unless the project already has one.
- 3 Return results grouped by entity type, strongest match first.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/global-search
Voice Search
Voice Search
Let people speak a search query instead of typing it, and still edit what was heard.
What it does
A microphone control on the app's existing search field that turns speech into a query the user can correct before it runs.
How it works
- 1 Add the microphone to the search input the app already has. Do not build a separate voice search screen or a second results page; the spoken query must go through the same search, the same filters, and the same ranking as a typed one.
- 2 Show words as they are recognised, in the search field itself, so the user can see the microphone is working before the final result arrives.
- 3 Leave the recognised text in the field as ordinary editable text once recognition finishes. The single most common repair is the user fixing one wrong word and pressing enter.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/voice-search
Store Locator
Store Locator
Help visitors find the nearest branch, with hours, directions, and a way to get in touch.
What it does
A searchable list of physical locations with distance, opening hours, contact details, and a map view.
How it works
- 1 Build the list first and the map second. The list of nearest locations with address, distance, hours, and phone number is the feature; the map is a way to scan it.
- 2 Offer to use the visitor's device location and always offer a text field for a postcode, town, or address alongside it. Never make the location prompt the only route in.
- 3 Store opening hours per location with the location's own time zone, including regular weekly hours and dated exceptions for holidays and one-off closures, and compute open or closed from those.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/store-locator
How it works
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1
Copy the link
Grab the Markdown instruction URL for this feature.
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2
Give it to your AI
Paste it into Claude Code, Cursor, v0, Lovable — whatever you build with.
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3
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.