From 32fd7202daeccce8f8228cb89def26d9ab0bfdb1 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Fri, 12 Jun 2026 22:21:29 +0000
Subject: [PATCH 1/2] =?UTF-8?q?=F0=9F=8E=A8=20Palette:=20Improve=20drilldo?=
 =?UTF-8?q?wn=20navigation=20accessibility?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Replaced inner `div` wrapping breadcrumbs with semantic `<nav aria-label="Breadcrumb">`
- Added `aria-current="step"` dynamic attribute to the active breadcrumb item
- Added `aria-live="polite"` to the dynamic "Level X of Y" progress indicator so updates are announced to screen readers
- Hid decorative chevron icons from assistive technologies using `aria-hidden="true"`
- Applied `focus-visible` styling (`focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-neutral-400`) to all interactive buttons for clear keyboard navigation states
- Added a UX learning entry to `.Jules/palette.md`

Co-authored-by: aarjava <218419324+aarjava@users.noreply.github.com>
---
 .Jules/palette.md                             |  3 +++
 .../drilldown/drilldown-navigation.tsx        | 22 +++++++++++--------
 2 files changed, 16 insertions(+), 9 deletions(-)
 create mode 100644 .Jules/palette.md

diff --git a/.Jules/palette.md b/.Jules/palette.md
new file mode 100644
index 00000000..5034b645
--- /dev/null
+++ b/.Jules/palette.md
@@ -0,0 +1,3 @@
+## 2024-06-12 - [Accessible Drilldown Navigation]
+**Learning:** When building progressive disclosure or drilldown navigation components, visual indicators of progress are insufficient for screen reader users. The dynamic updates (like changing levels) need to be explicitly announced, and the current position within the drilldown flow must be semantically communicated.
+**Action:** Always wrap drilldown breadcrumbs in a `<nav aria-label="Breadcrumb">` region, mark the active step with `aria-current="step"`, and use an `aria-live="polite"` region for dynamic counters (e.g., "Level 2 of 4") to create an inclusive and accessible disclosure experience. Additionally, ensure all interactive controls have high-contrast `focus-visible` rings for keyboard navigation.
\ No newline at end of file
diff --git a/src/components/drilldown/drilldown-navigation.tsx b/src/components/drilldown/drilldown-navigation.tsx
index 9489f7f8..09bda3e2 100644
--- a/src/components/drilldown/drilldown-navigation.tsx
+++ b/src/components/drilldown/drilldown-navigation.tsx
@@ -56,7 +56,10 @@ export function DrilldownNavigation({
   return (
     <div className={clsx('flex flex-col', className)}>
       {/* Navigation Breadcrumb */}
-      <div className="flex items-center gap-2 mb-4 text-sm text-neutral-400">
+      <nav
+        aria-label="Breadcrumb"
+        className="flex items-center gap-2 mb-4 text-sm text-neutral-400"
+      >
         {levels.map((level, idx) => (
           <div key={level.id} className="flex items-center gap-2">
             <button
@@ -64,17 +67,18 @@ export function DrilldownNavigation({
                 setCurrentLevel(idx)
                 onLevelChange?.(level.id)
               }}
+              aria-current={idx === currentLevel ? 'step' : undefined}
               className={clsx(
-                'hover:text-neutral-200 transition-colors',
+                'hover:text-neutral-200 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-neutral-400 rounded',
                 idx === currentLevel && 'text-neutral-200 font-medium'
               )}
             >
               {level.title}
             </button>
-            {idx < levels.length - 1 && <ChevronRight className="size-4" />}
+            {idx < levels.length - 1 && <ChevronRight className="size-4" aria-hidden="true" />}
           </div>
         ))}
-      </div>
+      </nav>
 
       {/* Current Level Content */}
       <div className="flex-1">{current.content}</div>
@@ -85,18 +89,18 @@ export function DrilldownNavigation({
           onClick={handleBack}
           disabled={currentLevel === 0}
           className={clsx(
-            'flex items-center gap-2 px-4 py-2 rounded-md text-sm font-medium transition-opacity',
+            'flex items-center gap-2 px-4 py-2 rounded-md text-sm font-medium transition-opacity focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-neutral-400',
             'hover:opacity-80',
             currentLevel === 0
               ? 'opacity-50 cursor-not-allowed text-neutral-500'
               : 'text-neutral-300'
           )}
         >
-          <ChevronLeft className="size-4" />
+          <ChevronLeft className="size-4" aria-hidden="true" />
           Back
         </button>
 
-        <div className="text-xs text-neutral-500">
+        <div aria-live="polite" className="text-xs text-neutral-500">
           Level {currentLevel + 1} of {levels.length}
         </div>
 
@@ -104,7 +108,7 @@ export function DrilldownNavigation({
           onClick={handleNext}
           disabled={currentLevel === levels.length - 1}
           className={clsx(
-            'flex items-center gap-2 px-4 py-2 rounded-md text-sm font-medium transition-opacity',
+            'flex items-center gap-2 px-4 py-2 rounded-md text-sm font-medium transition-opacity focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-neutral-400',
             'hover:opacity-80',
             currentLevel === levels.length - 1
               ? 'opacity-50 cursor-not-allowed text-neutral-500'
@@ -112,7 +116,7 @@ export function DrilldownNavigation({
           )}
         >
           Next
-          <ChevronRight className="size-4" />
+          <ChevronRight className="size-4" aria-hidden="true" />
         </button>
       </div>
     </div>

From 66f3f932ad8408bdbd4688bb70363b1fa2029658 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Fri, 12 Jun 2026 22:24:35 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=8E=A8=20Palette:=20Improve=20drilldo?=
 =?UTF-8?q?wn=20navigation=20accessibility?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Replaced inner `div` wrapping breadcrumbs with semantic `<nav aria-label="Breadcrumb">`
- Added `aria-current="step"` dynamic attribute to the active breadcrumb item
- Added `aria-live="polite"` to the dynamic "Level X of Y" progress indicator so updates are announced to screen readers
- Hid decorative chevron icons from assistive technologies using `aria-hidden="true"`
- Applied `focus-visible` styling (`focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-neutral-400`) to all interactive buttons for clear keyboard navigation states
- Added a UX learning entry to `.Jules/palette.md`

Co-authored-by: aarjava <218419324+aarjava@users.noreply.github.com>