**As** a Begin of the insertiondeveloper using `Primer::Alpha::SelectPanel`End of the insertion Begin of the deletion \[enter role of user\]End of the deletion
**I want to** Begin of the insertionshow a live count of selected items in the show button without writing a custom Stimulus controllerEnd of the insertion Begin of the deletion \[enter objective\]End of the deletion
**so that** Begin of the insertionmulti-select panels (e.g. backlog filters) display selection counts with zero boilerplate.End of the insertion Begin of the deletion \[enter desired result\]End of the deletion

**Acceptance criteria**

* Begin of the insertion`with_show_button(counter: true)` renders a trailing `Counter` that updates on selection.

End of the insertion Begin of the deletion <br>


**Technical notes**

End of the deletion * Begin of the insertionThe counter reflects the true tracked selection count (survives filtering / remote re-fetch), not just visible rows.

* Counter hides at zero; shows/updates live on select/deselectEnd of the insertion Begin of the deletion <br>


**PermissionsEnd of the deletion and Begin of the insertionon initial connect.

End of the insertion Begin of the deletion visibility considerations**

End of the deletion * Begin of the insertion`counter_arguments:` customizes the Counter (scheme, limit, etc.); the `data-target`End of the insertion Begin of the deletion _To whomEnd of the deletion is Begin of the insertionforced and cannot be unwired.End of the insertion Begin of the deletion this feature visible?_End of the deletion

* Begin of the insertion`counter: true` combined with `icon:` raises `ArgumentError` outside production.

* Existing `dynamic_label` text behaviourEnd of the insertion Begin of the deletion _WhenEnd of the deletion is Begin of the insertionunchanged and may run simultaneously with the counter.End of the insertion Begin of the deletion it not visible?_End of the deletion


Begin of the insertion**Technical notes**End of the insertion Begin of the deletion **Translation considerations**End of the deletion

* Begin of the insertionCatalyst target `select-panel.dynamicLabelCount`; client writes `selectedItems.length` to `textContent`End of the insertion Begin of the deletion _Key termsEnd of the deletion and Begin of the insertiontoggles `hidden`.

* Ruby sugar onEnd of the insertion Begin of the deletion phrases inEnd of the deletion the Begin of the insertion`show_button` slot auto-wires `Button#with_trailing_visual_counter` via the `merge_data` helper.

* Branch: `feature/DREAM-738-select-panel-dynamic-counter`End of the insertion Begin of the deletion key languages_&nbsp;End of the deletion


**Out of scope**

* Begin of the insertionClient-rendered listEnd of the insertion Begin of the deletion <br>


_Set the_ **To be informed/consulted teams** _field to include all teams necessary to be informedEnd of the deletion of Begin of the insertionselected labels, configurable separator, `<template>`/slot rendering, client-side number formatting.End of the insertion Begin of the deletion the changes._End of the deletion