refactor(core): remove shell description input (#32823)

packages/ui/src/components/basic-tool.tsx

@@ -1,4 +1,4 @@
-import { createEffect, For, Match, on, onCleanup, onMount, Show, Switch, type JSX } from "solid-js"
+import { createEffect, For, Match, on, onCleanup, onMount, Show, Switch, type Accessor, type JSX } from "solid-js"
 import { animate, type AnimationPlaybackControls } from "motion"
 import { useI18n } from "../context/i18n"
 import { createStore } from "solid-js/store"
@@ -24,7 +24,7 @@ const isTriggerTitle = (val: any): val is TriggerTitle => {
 
 export interface BasicToolProps {
   icon: IconProps["name"]
-  trigger: TriggerTitle | JSX.Element
+  trigger: TriggerTitle | JSX.Element | ((open: Accessor<boolean>) => JSX.Element)
   children?: JSX.Element
   status?: string
   hideDetails?: boolean
@@ -89,6 +89,7 @@ export function BasicTool(props: BasicToolProps) {
   const ready = () => state.ready
   const pending = () => props.status === "pending" || props.status === "running"
   const hasChildren = () => (props.defer ? "children" in props : props.children)
+  const dynamicTrigger = typeof props.trigger === "function" ? props.trigger(open) : undefined
 
   let cancelReady: (() => void) | undefined
 
@@ -187,6 +188,7 @@ export function BasicTool(props: BasicToolProps) {
       <div data-slot="basic-tool-tool-trigger-content">
         <div data-slot="basic-tool-tool-info">
           <Switch>
+            <Match when={dynamicTrigger !== undefined}>{dynamicTrigger}</Match>
             <Match when={isTriggerTitle(props.trigger) && props.trigger}>
               {(title) => (
                 <div data-slot="basic-tool-tool-info-structured">

packages/ui/src/components/message-part.tsx

@@ -422,7 +422,7 @@ export function getToolInfo(
       return {
         icon: "console",
         title: i18n.t("ui.tool.shell"),
-        subtitle: input.description,
+        subtitle: input.command,
       }
     case "edit":
       return {
@@ -1905,18 +1905,18 @@ ToolRegistry.register({
       <BasicTool
         {...props}
         icon="console"
-        trigger={
+        trigger={(open) => (
           <div data-slot="basic-tool-tool-info-structured">
             <div data-slot="basic-tool-tool-info-main">
               <span data-slot="basic-tool-tool-title">
                 <TextShimmer text={i18n.t("ui.tool.shell")} active={pending()} />
               </span>
-              <Show when={!pending() && props.input.description}>
-                <ShellSubmessage text={props.input.description} animate={sawPending} />
+              <Show when={!pending() && !open() && props.input.command}>
+                <ShellSubmessage text={props.input.command} animate={sawPending} />
               </Show>
             </div>
           </div>
-        }
+        )}
       >
         <div data-component="bash-output">
           <div data-slot="bash-copy">

packages/ui/src/components/timeline-playground.stories.tsx

@@ -316,10 +316,10 @@ const TOOL_SAMPLES = {
   },
   bash: {
     tool: "bash",
-    input: { command: "bun test --filter session", description: "Run session tests" },
+    input: { command: "bun test --filter session" },
     output:
       "bun test v1.3.14\n\n✓ session-turn.test.tsx (3 tests) 45ms\n✓ message-part.test.tsx (7 tests) 120ms\n\nTest Suites: 2 passed, 2 total\nTests:       10 passed, 10 total\nTime:        0.89s",
-    title: "Run session tests",
+    title: "bun test --filter session",
     metadata: { command: "bun test --filter session" },
   },
   edit: {