diff --git a/frontend/src/lib/components/sessions/SessionPicker.svelte b/frontend/src/lib/components/sessions/SessionPicker.svelte
index 7e8283e406..898a97739b 100644
--- a/frontend/src/lib/components/sessions/SessionPicker.svelte
+++ b/frontend/src/lib/components/sessions/SessionPicker.svelte
@@ -60,7 +60,7 @@
 	import MenuButton, { sidebarClasses } from '$lib/components/sidebar/MenuButton.svelte'
 	import DropdownV2 from '$lib/components/DropdownV2.svelte'
 	import { isGlobalAiEnabled } from '$lib/components/copilot/chat/global/gate'
-	import { userWorkspaces, workspaceStore } from '$lib/stores'
+	import { userStore, userWorkspaces, workspaceStore } from '$lib/stores'
 	import { workspaceIsFork } from '$lib/utils/workspaceHierarchy'
 	import { WorkspaceService } from '$lib/gen'
 	import { sendUserToast } from '$lib/toast'
@@ -220,7 +220,7 @@
 	// Workspace tree scoped to the current family (root + its forks), so the rail
 	// only shows the workspaces in the family we're in — not every workspace.
 	const workspaceTreeItems = $derived.by(() => {
-		const all = buildWorkspaceHierarchy($userWorkspaces)
+		const all = buildWorkspaceHierarchy($userWorkspaces, $userStore?.email)
 		const currentRoot = $currentWorkspaceRootId
 		if (!currentRoot) return all
 		return all.filter((i) => workspaceRootId(i.workspace.id, $userWorkspaces) === currentRoot)
diff --git a/frontend/src/lib/components/sessions/WorkspaceFamilyPicker.svelte b/frontend/src/lib/components/sessions/WorkspaceFamilyPicker.svelte
index f5b7e8d34f..09fed8bba6 100644
--- a/frontend/src/lib/components/sessions/WorkspaceFamilyPicker.svelte
+++ b/frontend/src/lib/components/sessions/WorkspaceFamilyPicker.svelte
@@ -10,11 +10,11 @@
 		type UserWorkspace
 	} from '$lib/stores'
 	import {
-		findWorkspaceDescendants,
 		findCanonicalDevWorkspace,
 		findDefaultForkBase,
 		findWorkspaceRoot,
-		buildWorkspaceHierarchy
+		buildWorkspaceHierarchy,
+		workspaceSubtreeRows
 	} from '$lib/utils/workspaceHierarchy'
 	import { useForkableWorkspaces } from '$lib/utils/useForkableWorkspaces.svelte'
 	import { canCreateFork } from '$lib/utils/editInFork'
@@ -102,7 +102,11 @@
 	})
 	const forkableWorkspaces = $derived(forkableWorkspacesProp ?? ownForkable.current)
 	const root = $derived(findWorkspaceRoot(effectiveId, forkableWorkspaces))
-	const forks = $derived(root ? findWorkspaceDescendants(root.id, forkableWorkspaces) : [])
+	// The same hierarchy the sidebar workspace menu builds: forks of forks follow their parent, and the
+	// user's own forks lead each group of siblings.
+	const hierarchy = $derived(buildWorkspaceHierarchy(forkableWorkspaces, $userStore?.email))
+	const forkRows = $derived(root ? workspaceSubtreeRows(root.id, hierarchy) : [])
+	const forks = $derived(forkRows.map((h) => h.workspace))
 
 	// The family's canonical dev workspace, if any — still used for gating (a forking-locked root can be
 	// forked via its dev) and as a selectable base with a "dev" badge.
@@ -126,13 +130,10 @@
 		}))
 	)
 
-	// Depth of each workspace within its family (root = 0, its forks = 1, forks of forks = 2, …), from
-	// the shared hierarchy builder — the same one the sidebar workspace menu uses — so the list indents
-	// forks of forks under their parent the same way. `forks` is a DFS of descendants (parent before
-	// child), so indenting each row by its depth nests it under its parent.
-	const familyDepths = $derived(
-		new Map(buildWorkspaceHierarchy(forkableWorkspaces).map((h) => [h.workspace.id, h.depth]))
-	)
+	// Depth of each workspace within its family (root = 0, its forks = 1, forks of forks = 2, …).
+	// `forks` is a DFS (parent before child), so indenting each row by its depth nests it under its
+	// parent, the same way the sidebar menu does.
+	const familyDepths = $derived(new Map(hierarchy.map((h) => [h.workspace.id, h.depth])))
 	// Extra left padding (on top of the row's base px-3) to nest a workspace one step per depth level,
 	// matching the sidebar menu's `depth * 16px`.
 	function indentStyle(id: string): string | undefined {
@@ -429,9 +430,16 @@
 						/>
 					</div>
 				{/if}
-				{#each forks as f, fi (f.id)}
+				{#each forkRows as { workspace: f, separatorBefore }, fi (f.id)}
 					{@const forkIdx = (root ? 1 : 0) + fi}
 					{@const accentStyle = forkAccentStyle(f.color)}
+					{#if separatorBefore}
+						<div
+							class="my-1 border-t border-border-light shrink-0"
+							style:margin-left={`${((familyDepths.get(f.id) ?? 1) - 1) * 16}px`}
+							role="separator"
+						></div>
+					{/if}
 					<div class="relative group shrink-0">
 						<button
 							type="button"
diff --git a/frontend/src/lib/components/sidebar/WorkspacePickerBody.svelte b/frontend/src/lib/components/sidebar/WorkspacePickerBody.svelte
index 3719e35d35..880aeb5416 100644
--- a/frontend/src/lib/components/sidebar/WorkspacePickerBody.svelte
+++ b/frontend/src/lib/components/sidebar/WorkspacePickerBody.svelte
@@ -136,7 +136,9 @@
 	// (standalone pages such as svix webhook creation), so
 	// there forks must stay directly selectable — list the full hierarchy
 	// unconditionally.
-	const hierarchy = $derived($userWorkspaces ? buildWorkspaceHierarchy($userWorkspaces) : [])
+	const hierarchy = $derived(
+		$userWorkspaces ? buildWorkspaceHierarchy($userWorkspaces, $userStore?.email) : []
+	)
 	const expandedFamilies = new SvelteSet<string>()
 	// Root ids with at least one fork — only they get the expand chevron.
 	// hierarchy is a DFS (parent before child), so a depth>0 row belongs to the
@@ -243,9 +245,16 @@
 	<!-- The list scrolls internally so the sections below (+ Workspace,
 	     Workspace fork, All workspaces) stay visible however long it gets. -->
 	<div class="py-1 overflow-y-auto max-h-[min(50vh,26rem)]">
-		{#each familyWorkspaces as { workspace, depth, isForked, parentName }}
+		{#each familyWorkspaces as { workspace, depth, isForked, parentName, separatorBefore } (workspace.id)}
 			{@const isActive = $workspaceStore === workspace.id}
 			{@const forkAccent = isForked ? forkAccentStyle(workspace.color) : undefined}
+			{#if separatorBefore}
+				<div
+					class="my-1 border-t border-border-light"
+					style:margin-left={`${(depth - 1) * 16}px`}
+					role="separator"
+				></div>
+			{/if}
 			<!-- Selection is a trailing tick (single-choice picker convention). A
 			     collapsed root carries the tick while one of its forks is active —
 			     the fork row is hidden and its family is the only trace of the
@@ -381,11 +390,7 @@
 	{/if}
 	{#if canManageWorkspace && !strictWorkspaceSelect}
 		<div class="py-1" role="none">
-			<MenuItem
-				href="/workspace_settings?workspace={$workspaceStore}"
-				class={itemClass}
-				{item}
-			>
+			<MenuItem href="/workspace_settings?workspace={$workspaceStore}" class={itemClass} {item}>
 				<Settings size={16} />
 				{(activeWorkspace && ambiguousNames.has(activeWorkspace.name)
 					? activeWorkspace.id
diff --git a/frontend/src/lib/utils/workspaceHierarchy.test.ts b/frontend/src/lib/utils/workspaceHierarchy.test.ts
index 14e063cba8..6855effedc 100644
--- a/frontend/src/lib/utils/workspaceHierarchy.test.ts
+++ b/frontend/src/lib/utils/workspaceHierarchy.test.ts
@@ -1,10 +1,12 @@
 import { describe, expect, it } from 'vitest'
 
 import {
+	buildWorkspaceHierarchy,
 	devWorkspacesInChainAbove,
 	findDefaultForkBase,
 	findWorkspaceAncestors,
-	findWorkspaceRoot
+	findWorkspaceRoot,
+	workspaceSubtreeRows
 } from './workspaceHierarchy'
 import type { UserWorkspace } from '../stores'
 
@@ -75,3 +77,39 @@ describe('devWorkspacesInChainAbove', () => {
 		expect(devWorkspacesInChainAbove('prod', nestedFamily)).toEqual([])
 	})
 })
+
+describe('buildWorkspaceHierarchy', () => {
+	const mine = { created_by: 'me@x.com' }
+	const theirs = { created_by: 'other@x.com' }
+	const forks = [
+		ws('wm-fork-a', 'prod', theirs),
+		ws('wm-fork-b', 'prod', theirs),
+		ws('wm-fork-c', 'prod', theirs),
+		ws('wm-fork-y', 'prod', mine),
+		ws('wm-fork-z', 'prod', mine)
+	]
+	const ids = (rows: ReturnType<typeof buildWorkspaceHierarchy>) =>
+		rows.map((h) => (h.separatorBefore ? '| ' : '') + h.workspace.id)
+
+	it("puts the user's own forks after the dev workspace, divided from the rest", () => {
+		const all = [root, ws('devws', 'prod', { is_dev_workspace: true, ...mine }), ...forks]
+		expect(ids(workspaceSubtreeRows('prod', buildWorkspaceHierarchy(all, 'me@x.com')))).toEqual([
+			'devws',
+			'wm-fork-y',
+			'wm-fork-z',
+			'| wm-fork-a',
+			'wm-fork-b',
+			'wm-fork-c'
+		])
+	})
+
+	it('draws no divider in a short list', () => {
+		const all = [root, ...forks.slice(2)]
+		expect(ids(buildWorkspaceHierarchy(all, 'me@x.com'))).toEqual([
+			'prod',
+			'wm-fork-y',
+			'wm-fork-z',
+			'wm-fork-c'
+		])
+	})
+})
diff --git a/frontend/src/lib/utils/workspaceHierarchy.ts b/frontend/src/lib/utils/workspaceHierarchy.ts
index 55d54e1b2c..c19eae3c74 100644
--- a/frontend/src/lib/utils/workspaceHierarchy.ts
+++ b/frontend/src/lib/utils/workspaceHierarchy.ts
@@ -6,14 +6,26 @@ export interface WorkspaceHierarchyItem {
 	isForked: boolean
 	parentName?: string
 	hasChildren: boolean
+	/** First fork after the caller's own forks among its siblings; pickers draw a divider above it. */
+	separatorBefore?: boolean
 }
 
+/** Sibling forks below this count stay undivided: a divider in a short list is noise. */
+const OWNED_FORKS_SEPARATOR_MIN_SIBLINGS = 5
+
 /**
  * Builds a hierarchical structure from a flat array of workspaces.
  * Supports unlimited nesting levels (fork of fork of fork...).
  * Returns a flattened array with hierarchy metadata for easy rendering.
+ *
+ * With `currentUserEmail`, the forks that user created lead each sibling group (after the dev
+ * workspace). When every admin and developer is added to new forks, a family lists everyone's forks,
+ * and without this the user's own are scattered alphabetically among them.
  */
-export function buildWorkspaceHierarchy(workspaces: UserWorkspace[]): WorkspaceHierarchyItem[] {
+export function buildWorkspaceHierarchy(
+	workspaces: UserWorkspace[],
+	currentUserEmail?: string | null
+): WorkspaceHierarchyItem[] {
 	if (!workspaces || workspaces.length === 0) {
 		return []
 	}
@@ -45,12 +57,15 @@ export function buildWorkspaceHierarchy(workspaces: UserWorkspace[]): WorkspaceH
 
 	const result: WorkspaceHierarchyItem[] = []
 
+	const isOwnedFork = (w: UserWorkspace) => !w.is_dev_workspace && isForkOwner(w, currentUserEmail)
+
 	// Recursively build the hierarchy
 	function addWorkspaceAndChildren(
 		workspace: UserWorkspace,
 		depth: number,
 		isForked: boolean,
-		parentName?: string
+		parentName?: string,
+		separatorBefore?: boolean
 	) {
 		// Add the current workspace
 		result.push({
@@ -58,19 +73,31 @@ export function buildWorkspaceHierarchy(workspaces: UserWorkspace[]): WorkspaceH
 			depth,
 			isForked,
 			parentName,
-			hasChildren: hasChildrenSet.has(workspace.id)
+			hasChildren: hasChildrenSet.has(workspace.id),
+			separatorBefore
 		})
 
-		// Add its children: the canonical dev workspace first, then throwaway forks by name.
-		const children = childrenMap.get(workspace.id) || []
-		children
-			.sort((a, b) => {
-				if (!!a.is_dev_workspace !== !!b.is_dev_workspace) return a.is_dev_workspace ? -1 : 1
-				return a.name.localeCompare(b.name)
-			})
-			.forEach((child) => {
-				addWorkspaceAndChildren(child, depth + 1, true, workspace.name)
-			})
+		// Add its children: the canonical dev workspace first, then the user's own forks, then the
+		// other forks, each by name.
+		const children = (childrenMap.get(workspace.id) || []).sort((a, b) => {
+			if (!!a.is_dev_workspace !== !!b.is_dev_workspace) return a.is_dev_workspace ? -1 : 1
+			if (isOwnedFork(a) !== isOwnedFork(b)) return isOwnedFork(a) ? -1 : 1
+			return a.name.localeCompare(b.name)
+		})
+		const forkCount = children.filter((c) => !c.is_dev_workspace).length
+		const firstOtherFork =
+			forkCount >= OWNED_FORKS_SEPARATOR_MIN_SIBLINGS && children.some(isOwnedFork)
+				? children.find((c) => !c.is_dev_workspace && !isOwnedFork(c))
+				: undefined
+		children.forEach((child) => {
+			addWorkspaceAndChildren(
+				child,
+				depth + 1,
+				true,
+				workspace.name,
+				child === firstOtherFork || undefined
+			)
+		})
 	}
 
 	// Process root workspaces (sorted by name for consistency)
@@ -89,6 +116,21 @@ export function buildWorkspaceHierarchy(workspaces: UserWorkspace[]): WorkspaceH
 	return result
 }
 
+/**
+ * The hierarchy rows below `rootId` (the root itself excluded), in the order and with the depths
+ * `buildWorkspaceHierarchy` gives them.
+ */
+export function workspaceSubtreeRows(
+	rootId: string,
+	hierarchy: WorkspaceHierarchyItem[]
+): WorkspaceHierarchyItem[] {
+	const at = hierarchy.findIndex((h) => h.workspace.id === rootId)
+	if (at < 0) return []
+	const rootDepth = hierarchy[at].depth
+	const end = hierarchy.findIndex((h, i) => i > at && h.depth <= rootDepth)
+	return hierarchy.slice(at + 1, end < 0 ? undefined : end)
+}
+
 /**
  * Helper function to get the indentation padding based on depth.
  * Each level adds 24px of left padding.