feat(dev): picker uses homepage tree view with summaries

Replace the hand-rolled Button-list picker with a TreeView-style layout
that mirrors the Windmill homepage: folder/user tree grouping via
`groupItems`, item rows rendered through the shared `Row.svelte` (no
actions, no favourites, no link — just the visual), a `SearchItems`
fuzzy filter with the same search input styling and placeholder as the
homepage, and `group-open:` chevron toggling on native <details>.

The CLI's listWorkspacePaths now also reads summaries from each item's
metadata (flow.yaml for flows, <script>.script.yaml for scripts) in
parallel so the picker shows summaries as the primary row label, same
as the homepage. Raw apps have no standard manifest so they show the
path only.

Additional polish: title shows "<workspace> (local)" instead of
generic text, subtitle trimmed, item-wrapper owns the border-b so
Row's internal last:border-b-0 doesn't zero it out, summary border
gated on group-open: to avoid doubled lines when a folder is
collapsed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cli/src/commands/dev/dev.ts

@@ -108,6 +108,7 @@ function restorePathScripts(flowValue: any) {
 type WmPathItem = {
   path: string;
   kind: "flow" | "script" | "raw_app";
+  summary?: string;
 };
 
 const FLOW_SUFFIXES = [".flow", "__flow"] as const;
@@ -121,7 +122,9 @@ function stripFolderSuffix(rel: string, suffixes: readonly string[]): string {
 }
 
 async function listWorkspacePaths(): Promise<WmPathItem[]> {
-  const items: WmPathItem[] = [];
+  // Walk first, capturing each item's metadata file path. Then read summaries in
+  // parallel — one tree pass plus N file reads is faster than a serialized walk.
+  const items: (WmPathItem & { _metaPath?: string })[] = [];
   async function walk(dir: string, rel: string) {
     let entries;
     try {
@@ -132,30 +135,52 @@ async function listWorkspacePaths(): Promise<WmPathItem[]> {
     for (const entry of entries) {
       if (entry.name.startsWith(".") || entry.name === "node_modules") continue;
       const childRel = rel ? `${rel}/${entry.name}` : entry.name;
+      const childAbs = path.join(dir, entry.name);
       if (entry.isDirectory()) {
         if (FLOW_SUFFIXES.some((s) => entry.name.endsWith(s))) {
-          items.push({ path: stripFolderSuffix(childRel, FLOW_SUFFIXES), kind: "flow" });
+          items.push({
+            path: stripFolderSuffix(childRel, FLOW_SUFFIXES),
+            kind: "flow",
+            _metaPath: path.join(childAbs, "flow.yaml"),
+          });
           continue;
         }
         if (APP_SUFFIXES.some((s) => entry.name.endsWith(s))) {
           items.push({ path: stripFolderSuffix(childRel, APP_SUFFIXES), kind: "raw_app" });
           continue;
         }
-        await walk(path.join(dir, entry.name), childRel);
+        await walk(childAbs, childRel);
       } else if (entry.isFile()) {
         const matchedExt = exts.find((ext) => entry.name.endsWith(ext));
         if (matchedExt) {
+          const noExtAbs = childAbs.slice(0, -matchedExt.length);
           items.push({
             path: childRel.slice(0, -matchedExt.length),
             kind: "script",
+            _metaPath: noExtAbs + ".script.yaml",
           });
         }
       }
     }
   }
   await walk(process.cwd(), "");
+
+  await Promise.all(
+    items.map(async (item) => {
+      if (!item._metaPath) return;
+      try {
+        const meta: any = await yamlParseFile(item._metaPath);
+        if (typeof meta?.summary === "string" && meta.summary.length > 0) {
+          item.summary = meta.summary;
+        }
+      } catch {
+        // No metadata file or unparseable — leave summary undefined
+      }
+    })
+  );
+
   items.sort((a, b) => a.path.localeCompare(b.path));
-  return items;
+  return items.map(({ _metaPath, ...item }) => item);
 }
 
 export interface DevOpts {

frontend/src/lib/components/Dev.svelte

@@ -18,7 +18,13 @@
 	} from '$lib/gen'
 	import { inferArgs } from '$lib/infer'
 	import { userStore, workspaceStore } from '$lib/stores'
-	import { emptySchema, readFieldsRecursively, sendUserToast, type StateStore } from '$lib/utils'
+	import {
+		emptySchema,
+		pluralize,
+		readFieldsRecursively,
+		sendUserToast,
+		type StateStore
+	} from '$lib/utils'
 	import { Pane, Splitpanes } from 'svelte-splitpanes'
 	import { onDestroy, onMount, setContext, untrack } from 'svelte'
 	import DarkModeToggle from '$lib/components/sidebar/DarkModeToggle.svelte'
@@ -38,7 +44,31 @@
 	import { GroupEditor, setGroupEditorContext } from './graph/groupEditor.svelte'
 	import { dfs } from './flows/dfs'
 	import { loadSchemaFromModule } from './flows/flowInfers'
-	import { CornerDownLeft, Play, Workflow, Code, Layout } from 'lucide-svelte'
+	import {
+		CornerDownLeft,
+		Play,
+		Folder,
+		FolderTree,
+		User,
+		Search,
+		ChevronDown,
+		ChevronUp,
+		Code2,
+		LayoutDashboard
+	} from 'lucide-svelte'
+	import ToggleButtonGroup from '$lib/components/common/toggleButton-v2/ToggleButtonGroup.svelte'
+	import ToggleButton from '$lib/components/common/toggleButton-v2/ToggleButton.svelte'
+	import FlowIcon from '$lib/components/home/FlowIcon.svelte'
+	import {
+		groupItems,
+		type ItemType,
+		type FolderItem,
+		type UserItem
+	} from '$lib/components/home/treeViewUtils'
+	import SearchItems from '$lib/components/SearchItems.svelte'
+	import TextInput from '$lib/components/text_input/TextInput.svelte'
+	import Row from '$lib/components/common/table/Row.svelte'
+	import { HOME_SEARCH_PLACEHOLDER } from '$lib/consts'
 	import Toggle from './Toggle.svelte'
 	import { setLicense } from '$lib/enterpriseUtils'
 	import type { FlowCopilotContext } from './copilot/flow'
@@ -165,7 +195,11 @@
 	const searchParams = indexQ > -1 ? new URLSearchParams(href.substring(indexQ)) : undefined
 	let relativePaths: any[] = $state([])
 
-	type WmPathItem = { path: string; kind: 'flow' | 'script' | 'raw_app' }
+	type WmPathItem = {
+		path: string
+		kind: 'flow' | 'script' | 'raw_app'
+		summary?: string
+	}
 	function parseWatchPath(): string | undefined {
 		const i = window.location.href.indexOf('?')
 		if (i < 0) return undefined
@@ -175,6 +209,30 @@
 	let watchPath = $state(parseWatchPath()?.replace(PATH_SUFFIX_RE, ''))
 	let pickerItems: WmPathItem[] = $state([])
 	const pickerMode = $derived(!watchPath)
+	let pickerFilter = $state('')
+	let pickerKind: 'all' | 'flow' | 'script' | 'raw_app' = $state('all')
+	// Shape pickerItems into the homepage's ItemType so we can reuse `groupItems`
+	// for the folder/user tree structure. `kind` ('script'|'flow'|'raw_app') maps 1:1
+	// onto ItemType['type']; missing fields (canWrite, edited_at, etc.) default to safe values.
+	const pickerTreeItems = $derived(
+		pickerItems.map(
+			(item) =>
+				({
+					path: item.path,
+					summary: item.summary ?? '',
+					type: item.kind,
+					canWrite: true,
+					extra_perms: {},
+					starred: false,
+					edited_at: ''
+				}) as unknown as ItemType
+		)
+	)
+	const pickerKindFilteredItems = $derived(
+		pickerKind === 'all' ? pickerTreeItems : pickerTreeItems.filter((i) => i.type === pickerKind)
+	)
+	let pickerFilteredItems: (ItemType & { marked?: string })[] | undefined = $state(undefined)
+	const pickerGroups = $derived(groupItems(pickerFilteredItems ?? pickerKindFilteredItems))
 
 	if (searchParams?.has('local')) {
 		connectWs()
@@ -789,6 +847,92 @@
 <JobLoader noCode={true} bind:this={jobLoader} bind:isLoading={testIsLoading} bind:job={testJob} />
 
 <main class="h-screen w-full">
+	{#snippet itemRow(item: ItemType & { marked?: string }, depth: number)}
+		{@const wmItem = pickerItems.find((p) => p.path === item.path)}
+		<!-- svelte-ignore a11y_click_events_have_key_events -->
+		<!-- svelte-ignore a11y_no_static_element_interactions -->
+		<div onclick={() => wmItem && pickPath(wmItem)} class="cursor-pointer border-b last:border-b-0">
+			<Row
+				marked={item.marked}
+				path={item.path}
+				summary={item.summary}
+				kind={item.type}
+				{depth}
+				workspaceId={$workspaceStore ?? ''}
+				canFavorite={false}
+			/>
+		</div>
+	{/snippet}
+	{#snippet treeNode(node: ItemType | FolderItem | UserItem, depth: number)}
+		{#if 'folderName' in node}
+			<details open class="group border-b last:border-b-0">
+				<summary
+					class="px-4 py-2 w-full flex flex-row items-center justify-between cursor-pointer list-none group-open:border-b"
+				>
+					<div
+						class="flex flex-row items-center gap-4 text-sm font-semibold"
+						style={depth > 0 ? `padding-left: ${depth * 16}px;` : ''}
+					>
+						<div class="flex justify-center items-center">
+							{#if depth === 0}
+								<Folder size={16} class="text-secondary" />
+							{:else}
+								<FolderTree size={16} class="text-secondary" />
+							{/if}
+						</div>
+						<div>
+							<span class="whitespace-nowrap text-xs text-emphasis font-semibold"
+								>{#if depth === 0}f/{/if}{node.folderName}</span
+							>
+							<div class="text-2xs font-normal text-secondary whitespace-nowrap">
+								({pluralize(node.items.length, ' item')})
+							</div>
+						</div>
+					</div>
+					<div class="w-full flex flex-row-reverse">
+						<ChevronUp size={16} class="hidden group-open:block" />
+						<ChevronDown size={16} class="block group-open:hidden" />
+					</div>
+				</summary>
+				{#each node.items as child ('folderName' in child ? `f__${child.folderName}` : 'username' in child ? `u__${child.username}` : `i__${child.type}__${child.path}`)}
+					{@render treeNode(child, depth + 1)}
+				{/each}
+			</details>
+		{:else if 'username' in node}
+			<details open class="group border-b last:border-b-0">
+				<summary
+					class="px-4 py-2 w-full flex flex-row items-center justify-between cursor-pointer list-none group-open:border-b"
+				>
+					<div
+						class="flex flex-row items-center gap-4 text-sm font-semibold"
+						style={depth > 0 ? `padding-left: ${depth * 16}px;` : ''}
+					>
+						<div class="flex justify-center items-center">
+							<User size={16} class="text-secondary" />
+						</div>
+						<div>
+							<span class="whitespace-nowrap text-xs text-emphasis font-semibold"
+								>u/{node.username}</span
+							>
+							<div class="text-2xs font-normal text-secondary whitespace-nowrap">
+								({pluralize(node.items.length, ' item')})
+							</div>
+						</div>
+					</div>
+					<div class="w-full flex flex-row-reverse">
+						<ChevronUp size={16} class="hidden group-open:block" />
+						<ChevronDown size={16} class="block group-open:hidden" />
+					</div>
+				</summary>
+				{#each node.items as child ('folderName' in child ? `f__${child.folderName}` : 'username' in child ? `u__${child.username}` : `i__${child.type}__${child.path}`)}
+					{@render treeNode(child, depth + 1)}
+				{/each}
+			</details>
+		{:else}
+			{@render itemRow(node as ItemType & { marked?: string }, depth)}
+		{/if}
+	{/snippet}
+
 	{#if pickerMode}
 		<div class="h-full w-full overflow-auto p-6">
 			<div class="absolute top-2 left-2">
@@ -802,73 +946,72 @@
 				{/if}
 			</div>
 			<div class="max-w-3xl mx-auto pt-8">
-				<h1 class="text-2xl font-semibold text-primary mb-1">Pick a file to preview</h1>
-				<p class="text-sm text-secondary mb-6">
-					Click a flow or script to load it in the dev editor. The URL will update so you can
-					bookmark or share it.
-				</p>
+				<h1 class="text-2xl font-semibold text-primary mb-1">
+					{$workspaceStore}
+					<span class="font-normal text-secondary">(local)</span>
+				</h1>
+				<p class="text-sm text-secondary mb-4"> Click a flow or a script to preview it. </p>
+
+				<SearchItems
+					filter={pickerFilter}
+					items={pickerKindFilteredItems}
+					f={(item: ItemType) => `${item.path} ${item.summary ?? ''}`}
+					bind:filteredItems={pickerFilteredItems}
+				/>
+
+				<div class="flex flex-row gap-2 items-center mb-3 w-full">
+					<ToggleButtonGroup bind:selected={pickerKind} class="w-fit">
+						{#snippet children({ item })}
+							<ToggleButton value="all" label="All" size="md" {item} />
+							<ToggleButton value="script" icon={Code2} label="Scripts" size="md" {item} />
+							<ToggleButton
+								value="flow"
+								label="Flows"
+								icon={FlowIcon}
+								selectedColor="#14b8a6"
+								size="md"
+								{item}
+							/>
+							<ToggleButton
+								value="raw_app"
+								label="Apps"
+								icon={LayoutDashboard}
+								selectedColor="#fb923c"
+								size="md"
+								{item}
+							/>
+						{/snippet}
+					</ToggleButtonGroup>
+
+					<div class="relative text-primary flex-1 min-w-[100px]">
+						<!-- svelte-ignore a11y_autofocus -->
+						<TextInput
+							inputProps={{
+								autofocus: true,
+								placeholder: HOME_SEARCH_PLACEHOLDER
+							}}
+							size="md"
+							bind:value={pickerFilter}
+							class="!pr-10"
+						/>
+						<div class="absolute right-0 top-0 mt-2 mr-4 text-secondary" aria-hidden="true">
+							<Search size={16} />
+						</div>
+					</div>
+				</div>
+
 				{#if pickerItems.length === 0}
 					<div class="text-sm text-secondary"
 						>No flows, scripts, or apps detected in this workspace.</div
 					>
+				{:else if pickerGroups.length === 0}
+					<div class="text-sm text-secondary">No items match the search.</div>
 				{:else}
-					{@const flows = pickerItems.filter((i) => i.kind === 'flow')}
-					{@const scripts = pickerItems.filter((i) => i.kind === 'script')}
-					{@const apps = pickerItems.filter((i) => i.kind === 'raw_app')}
-					{#if flows.length > 0}
-						<h2 class="text-sm font-semibold text-primary mt-4 mb-2 flex items-center gap-2">
-							<Workflow size={14} /> Flows
-						</h2>
-						<div class="flex flex-col gap-1">
-							{#each flows as item (item.path)}
-								<Button
-									variant="default"
-									size="xs"
-									btnClasses="!justify-start"
-									on:click={() => pickPath(item)}
-								>
-									{item.path}
-								</Button>
-							{/each}
-						</div>
-					{/if}
-					{#if scripts.length > 0}
-						<h2 class="text-sm font-semibold text-primary mt-6 mb-2 flex items-center gap-2">
-							<Code size={14} /> Scripts
-						</h2>
-						<div class="flex flex-col gap-1">
-							{#each scripts as item (item.path)}
-								<Button
-									variant="default"
-									size="xs"
-									btnClasses="!justify-start"
-									on:click={() => pickPath(item)}
-								>
-									{item.path}
-								</Button>
-							{/each}
-						</div>
-					{/if}
-					{#if apps.length > 0}
-						<h2 class="text-sm font-semibold text-primary mt-6 mb-2 flex items-center gap-2">
-							<Layout size={14} /> Apps
-							<span class="text-xs font-normal text-secondary"
-								>(use <code>wmill app dev</code>)</span
-							>
-						</h2>
-						<div class="flex flex-col gap-1">
-							{#each apps as item (item.path)}
-								<Button
-									variant="subtle"
-									size="xs"
-									btnClasses="!justify-start"
-									on:click={() => pickPath(item)}
-								>
-									{item.path}
-								</Button>
-							{/each}
-						</div>
-					{/if}
+					<div class="border rounded-md bg-surface-tertiary overflow-hidden">
+						{#each pickerGroups as group ('folderName' in group ? `f__${group.folderName}` : 'username' in group ? `u__${group.username}` : `i__${group.type}__${group.path}`)}
+							{@render treeNode(group, 0)}
+						{/each}
+					</div>
 				{/if}
 			</div>
 		</div>