diff --git a/apps/web/components/select-spaces-modal.tsx b/apps/web/components/select-spaces-modal.tsx
index d190052c..31ae6364 100644
--- a/apps/web/components/select-spaces-modal.tsx
+++ b/apps/web/components/select-spaces-modal.tsx
@@ -9,6 +9,10 @@ import { XIcon, Search, Check } from "lucide-react"
 import { Button } from "@ui/components/button"
 import { DEFAULT_PROJECT_ID } from "@lib/constants"
 import type { ContainerTagListType } from "@lib/types"
+import {
+	compareSpacesUserFirst,
+	spaceSelectorDisplayName,
+} from "@/lib/ingest-auto-space"
 
 interface SelectSpacesModalProps {
 	isOpen: boolean
@@ -75,24 +79,26 @@ export function SelectSpacesModal({
 			name: "My Space",
 			emoji: "📁",
 			containerTag: DEFAULT_PROJECT_ID,
+			isExperimental: false,
+			isNova: false,
+			createdAt: "",
+			updatedAt: "",
+		} as ContainerTagListType
+
+		const rest = projects
+			.filter((p) => p.containerTag !== DEFAULT_PROJECT_ID)
+			.sort(compareSpacesUserFirst)
+
+		const allSpaces = [defaultSpace, ...rest]
+		if (!searchQuery.trim()) {
+			return allSpaces
 		}
-
-		const allSpaces = [
-			defaultSpace,
-			...projects.filter((p) => p.containerTag !== DEFAULT_PROJECT_ID),
-		]
-
-		let result = allSpaces
-		if (searchQuery.trim()) {
-			const query = searchQuery.toLowerCase()
-			result = allSpaces.filter(
-				(p) =>
-					p.containerTag.toLowerCase().includes(query) ||
-					p.name?.toLowerCase().includes(query),
-			)
-		}
-
-		return result
+		const query = searchQuery.trim().toLowerCase()
+		return allSpaces.filter(
+			(p) =>
+				p.containerTag.toLowerCase().includes(query) ||
+				(p.name ?? "").toLowerCase().includes(query),
+		)
 	}, [projects, searchQuery])
 
 	return (
@@ -169,7 +175,7 @@ export function SelectSpacesModal({
 										type="button"
 										onClick={() => handleToggle(project.containerTag)}
 										className={cn(
-											"flex items-center gap-3 w-full px-3 py-2.5 rounded-[12px] cursor-pointer transition-colors text-left",
+											"flex min-w-0 max-w-full items-center gap-3 w-full px-3 py-2.5 rounded-[12px] cursor-pointer transition-colors text-left",
 											isSelected
 												? "bg-[#14161A] border border-[rgba(82,89,102,0.3)]"
 												: "bg-transparent border border-transparent hover:bg-[#14161A]/50",
@@ -198,9 +204,14 @@ export function SelectSpacesModal({
 												{isSelected && <Check className="size-3 text-white" />}
 											</div>
 										)}
-										<span className="text-lg">{project.emoji || "📁"}</span>
-										<span className="text-[#fafafa] text-sm font-medium truncate flex-1">
-											{project.name ?? project.containerTag}
+										<span className="shrink-0 text-lg">
+											{project.emoji || "📁"}
+										</span>
+										<span
+											className="min-w-0 flex-1 truncate text-[#fafafa] text-sm font-medium"
+											title={project.name ?? project.containerTag}
+										>
+											{spaceSelectorDisplayName(project, project.containerTag)}
 										</span>
 									</button>
 								)
diff --git a/apps/web/components/space-selector.tsx b/apps/web/components/space-selector.tsx
index e8e2e68c..248889b7 100644
--- a/apps/web/components/space-selector.tsx
+++ b/apps/web/components/space-selector.tsx
@@ -34,6 +34,10 @@ import {
 } from "@repo/ui/components/select"
 import { Button } from "@repo/ui/components/button"
 import { analytics } from "@/lib/analytics"
+import {
+	compareSpacesUserFirst,
+	spaceSelectorDisplayName,
+} from "@/lib/ingest-auto-space"
 
 export interface SpaceSelectorProps {
 	selectedProjects: string[]
@@ -89,9 +93,19 @@ export function SpaceSelector({
 
 	const { allProjects, isLoading } = useContainerTags()
 
+	const sortedOtherSpaces = useMemo(
+		() =>
+			allProjects
+				.filter(
+					(p: ContainerTagListType) => p.containerTag !== DEFAULT_PROJECT_ID,
+				)
+				.sort(compareSpacesUserFirst),
+		[allProjects],
+	)
+
 	const displayInfo = useMemo(() => {
 		if (selectedProjects.length === 1) {
-			const containerTag = selectedProjects[0]
+			const containerTag = selectedProjects[0] ?? ""
 			if (containerTag === DEFAULT_PROJECT_ID) {
 				return { name: "My Space", emoji: "📁", isMultiple: false }
 			}
@@ -99,7 +113,7 @@ export function SpaceSelector({
 				(p: ContainerTagListType) => p.containerTag === containerTag,
 			)
 			return {
-				name: found?.name || containerTag,
+				name: spaceSelectorDisplayName(found, containerTag),
 				emoji: found?.emoji || "📁",
 				isMultiple: false,
 			}
@@ -113,7 +127,6 @@ export function SpaceSelector({
 			}
 		}
 
-		// Nothing selected — default to "My Space"
 		return { name: "My Space", emoji: "📁", isMultiple: false }
 	}, [allProjects, selectedProjects])
 
@@ -261,6 +274,7 @@ export function SpaceSelector({
 									"min-w-0 truncate text-sm font-medium text-white",
 									"max-w-[10rem] md:max-w-[15rem]",
 								)}
+								title={isLoading ? undefined : displayInfo.name}
 							>
 								{isLoading ? "…" : displayInfo.name}
 							</span>
@@ -285,7 +299,7 @@ export function SpaceSelector({
 				<DropdownMenuContent
 					align="start"
 					className={cn(
-						"min-w-[200px] p-1.5 rounded-xl border border-[#2E3033] shadow-[0px_1.5px_20px_0px_rgba(0,0,0,0.65)]",
+						"min-w-[200px] max-w-[min(calc(100vw-1.5rem),20rem)] overflow-hidden p-1.5 rounded-xl border border-[#2E3033] shadow-[0px_1.5px_20px_0px_rgba(0,0,0,0.65)]",
 						dmSansClassName(),
 						contentClassName,
 					)}
@@ -293,18 +307,23 @@ export function SpaceSelector({
 						background: "linear-gradient(180deg, #0A0E14 0%, #05070A 100%)",
 					}}
 				>
-					<div className="flex flex-col gap-2">
-						<div className="flex flex-col">
-							<div className="px-3 py-1">
-								<span className="text-[10px] uppercase tracking-wider text-[#737373] font-medium">
-									My Spaces
-								</span>
-							</div>
+					<div className="flex min-w-0 max-w-full flex-col gap-2">
+						<div className="shrink-0 px-3 py-1">
+							<span className="text-[10px] uppercase tracking-wider text-[#737373] font-medium">
+								My Spaces
+							</span>
+						</div>
 
+						<div
+							className={cn(
+								"flex min-h-0 max-h-[min(40vh,18rem)] min-w-0 flex-col overflow-y-auto overflow-x-hidden overscroll-contain",
+								"scrollbar-thin pr-0.5",
+							)}
+						>
 							<DropdownMenuItem
 								onClick={() => handleSelectSingleSpace(DEFAULT_PROJECT_ID)}
 								className={cn(
-									"flex items-center gap-2 px-3 py-2.5 rounded-md cursor-pointer text-white text-sm font-medium",
+									"flex min-w-0 max-w-full items-center gap-2 px-3 py-2.5 rounded-md cursor-pointer text-white text-sm font-medium",
 									selectedProjects.length === 1 &&
 										selectedProjects[0] === DEFAULT_PROJECT_ID
 										? "bg-[#293952]/40"
@@ -312,59 +331,57 @@ export function SpaceSelector({
 								)}
 							>
 								<span className="font-bold tracking-[-0.98px]">📁</span>
-								<span className="flex-1">My Space</span>
+								<span className="min-w-0 flex-1 truncate">My Space</span>
 							</DropdownMenuItem>
 
-							{allProjects
-								.filter(
-									(p: ContainerTagListType) =>
-										p.containerTag !== DEFAULT_PROJECT_ID,
-								)
-								.map((project: ContainerTagListType) => (
-									<DropdownMenuItem
-										key={project.id}
-										onClick={() =>
-											handleSelectSingleSpace(project.containerTag)
-										}
-										className={cn(
-											"flex items-center gap-2 px-3 py-2.5 rounded-md cursor-pointer text-white text-sm font-medium group",
-											selectedProjects.length === 1 &&
-												selectedProjects[0] === project.containerTag
-												? "bg-[#293952]/40"
-												: "opacity-60 hover:opacity-100 hover:bg-[#293952]/40",
-										)}
+							{sortedOtherSpaces.map((project: ContainerTagListType) => (
+								<DropdownMenuItem
+									key={project.id}
+									onClick={() => handleSelectSingleSpace(project.containerTag)}
+									className={cn(
+										"flex min-w-0 max-w-full items-center gap-2 px-3 py-2.5 rounded-md cursor-pointer text-white text-sm font-medium group",
+										selectedProjects.length === 1 &&
+											selectedProjects[0] === project.containerTag
+											? "bg-[#293952]/40"
+											: "opacity-60 hover:opacity-100 hover:bg-[#293952]/40",
+									)}
+								>
+									<span className="shrink-0 font-bold tracking-[-0.98px]">
+										{project.emoji || "📁"}
+									</span>
+									<span
+										className="min-w-0 flex-1 truncate"
+										title={project.name ?? project.containerTag}
 									>
-										<span className="font-bold tracking-[-0.98px]">
-											{project.emoji || "📁"}
-										</span>
-										<span className="truncate flex-1">
-											{project.name ?? project.containerTag}
-										</span>
-										{enableDelete && (
-											<button
-												type="button"
-												onClick={(e) =>
-													handleDeleteClick(e, {
-														id: project.id,
-														name: project.name,
-														containerTag: project.containerTag,
-													})
-												}
-												className="opacity-0 group-hover:opacity-100 transition-opacity p-1 rounded-full hover:bg-red-500/20"
-											>
-												<Trash2 className="size-3.5 text-red-500" />
-											</button>
-										)}
-									</DropdownMenuItem>
-								))}
+										{spaceSelectorDisplayName(project, project.containerTag)}
+									</span>
+									{enableDelete && (
+										<button
+											type="button"
+											onClick={(e) =>
+												handleDeleteClick(e, {
+													id: project.id,
+													name: project.name,
+													containerTag: project.containerTag,
+												})
+											}
+											className="opacity-0 group-hover:opacity-100 transition-opacity p-1 rounded-full hover:bg-red-500/20"
+										>
+											<Trash2 className="size-3.5 text-red-500" />
+										</button>
+									)}
+								</DropdownMenuItem>
+							))}
 						</div>
 
-						<DropdownMenuSeparator className="bg-[#2E3033]" />
+						<DropdownMenuSeparator className="shrink-0 bg-[#2E3033]" />
 
 						<button
 							type="button"
 							onClick={handleOpenSelectSpaces}
-							className="flex items-center justify-center gap-2 px-3 py-2 rounded-md cursor-pointer text-white text-sm font-medium border border-[#161F2C] hover:bg-[#0D121A]/80 transition-colors"
+							className={cn(
+								"flex min-w-0 w-full max-w-full shrink-0 items-center justify-center gap-2 px-3 py-2 rounded-md cursor-pointer text-white text-sm font-medium border border-[#161F2C] hover:bg-[#0D121A]/80 transition-colors",
+							)}
 							style={{
 								background: "linear-gradient(180deg, #0D121A 0%, #000000 100%)",
 							}}
@@ -377,7 +394,9 @@ export function SpaceSelector({
 							<button
 								type="button"
 								onClick={handleNewSpace}
-								className="flex items-center justify-center gap-2 px-3 py-2 rounded-md cursor-pointer text-white text-sm font-medium border border-[#161F2C] hover:bg-[#0D121A]/80 transition-colors"
+								className={cn(
+									"flex min-w-0 w-full max-w-full shrink-0 items-center justify-center gap-2 px-3 py-2 rounded-md cursor-pointer text-white text-sm font-medium border border-[#161F2C] hover:bg-[#0D121A]/80 transition-colors",
+								)}
 								style={{
 									background:
 										"linear-gradient(180deg, #0D121A 0%, #000000 100%)",
@@ -546,12 +565,12 @@ export function SpaceSelector({
 														value={p.id}
 														className="text-[#fafafa] hover:bg-[#1B1F24] cursor-pointer rounded-md"
 													>
-														<span className="flex items-center gap-2">
+														<span className="flex items-center gap-2 min-w-0">
 															<span>{p.emoji || "📁"}</span>
-															<span>
+															<span className="truncate">
 																{p.containerTag === DEFAULT_PROJECT_ID
 																	? "My Space"
-																	: p.name}
+																	: spaceSelectorDisplayName(p, p.containerTag)}
 															</span>
 														</span>
 													</SelectItem>
diff --git a/apps/web/lib/chat-space-label.ts b/apps/web/lib/chat-space-label.ts
index 262fd0e1..6eafc923 100644
--- a/apps/web/lib/chat-space-label.ts
+++ b/apps/web/lib/chat-space-label.ts
@@ -1,5 +1,6 @@
 import { DEFAULT_PROJECT_ID } from "@lib/constants"
 import type { ContainerTagListType } from "@lib/types"
+import { spaceSelectorDisplayName } from "@/lib/ingest-auto-space"
 
 /** Label for the space sent as chat `metadata.projectId` (container tag). */
 export function getChatSpaceDisplayLabel(options: {
@@ -10,6 +11,6 @@ export function getChatSpaceDisplayLabel(options: {
 	if (selectedProject === DEFAULT_PROJECT_ID) {
 		return "My Space"
 	}
-	const name = allProjects.find((p) => p.containerTag === selectedProject)?.name
-	return name?.trim() || selectedProject
+	const found = allProjects.find((p) => p.containerTag === selectedProject)
+	return spaceSelectorDisplayName(found, selectedProject)
 }
diff --git a/apps/web/lib/ingest-auto-space.ts b/apps/web/lib/ingest-auto-space.ts
new file mode 100644
index 00000000..9768a27e
--- /dev/null
+++ b/apps/web/lib/ingest-auto-space.ts
@@ -0,0 +1,38 @@
+import { DEFAULT_PROJECT_ID } from "@lib/constants"
+import type { ContainerTagListType } from "@lib/types"
+
+/**
+ * Spaces auto-created on first ingest use `name === \`Space ${containerTag}\``
+ * (mono `apps/api/src/routes/memories/handler-effect.ts`). Those are noisy in the
+ * UI; we sort them after everything else — no per-tool heuristics.
+ */
+export function isIngestAutoProvisionedSpace(
+	p: Pick<ContainerTagListType, "name" | "containerTag">,
+): boolean {
+	if (p.containerTag === DEFAULT_PROJECT_ID) return false
+	return (p.name ?? "") === `Space ${p.containerTag}`
+}
+
+/** Normal / named spaces first; auto-ingest `Space {tag}` rows last. */
+export function compareSpacesUserFirst(
+	a: Pick<ContainerTagListType, "name" | "containerTag">,
+	b: Pick<ContainerTagListType, "name" | "containerTag">,
+): number {
+	return (
+		Number(isIngestAutoProvisionedSpace(a)) -
+		Number(isIngestAutoProvisionedSpace(b))
+	)
+}
+
+export function spaceSelectorDisplayName(
+	p: Pick<ContainerTagListType, "name" | "containerTag"> | undefined,
+	fallback: string,
+): string {
+	if (!p) return fallback
+	const name = p.name ?? p.containerTag
+	const long = name.length > 44
+	if (long) {
+		return `${name.slice(0, 42)}…`
+	}
+	return name
+}