feat(app): better subagent experience (#20708)

1 files changed, 40 insertions, 0 deletions

diff --git a/packages/app/src/index.css b/packages/app/src/index.css
index 9e231e2d2..629ac80a8 100644
--- a/packages/app/src/index.css
+++ b/packages/app/src/index.css
@@ -1,6 +1,46 @@
 @import "@opencode-ai/ui/styles/tailwind";
 
 @layer components {
+  @keyframes session-progress-whip {
+    0% {
+      clip-path: inset(0 100% 0 0 round 999px);
+      animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
+    }
+
+    48% {
+      clip-path: inset(0 0 0 0 round 999px);
+      animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
+    }
+
+    100% {
+      clip-path: inset(0 0 0 100% round 999px);
+    }
+  }
+
+  [data-component="session-progress"] {
+    position: absolute;
+    inset: 0 0 auto;
+    height: 2px;
+    overflow: hidden;
+    pointer-events: none;
+    opacity: 1;
+    transition: opacity 220ms ease-out;
+  }
+
+  [data-component="session-progress"][data-state="hiding"] {
+    opacity: 0;
+  }
+
+  [data-component="session-progress-bar"] {
+    width: 100%;
+    height: 100%;
+    border-radius: 999px;
+    background: var(--session-progress-color);
+    clip-path: inset(0 100% 0 0 round 999px);
+    animation: session-progress-whip var(--session-progress-ms, 1800ms) infinite;
+    will-change: clip-path;
+  }
+
   [data-component="getting-started"] {
     container-type: inline-size;
     container-name: getting-started;