diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 80600ae5..c1398b7d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,5 +29,9 @@ jobs:
       - name: Run TypeScript type checking
         run: bunx turbo run check-types --filter='@supermemory/ai-sdk' --filter='@supermemory/memory-graph'
 
+      - name: Run web unit tests
+        working-directory: apps/web
+        run: bun test
+
       - name: Run Biome CI (format & lint on changed files)
         run: bunx biome ci --changed --since=origin/main --no-errors-on-unmatched
diff --git a/apps/web/hooks/use-personalization.test.tsx b/apps/web/hooks/use-personalization.test.tsx
new file mode 100644
index 00000000..93b97ec6
--- /dev/null
+++ b/apps/web/hooks/use-personalization.test.tsx
@@ -0,0 +1,291 @@
+import { afterEach, beforeAll, describe, expect, it, mock } from "bun:test"
+import { Window } from "happy-dom"
+import { act, cleanup, renderHook, waitFor } from "@testing-library/react"
+
+type AuthState = {
+	isSessionPending: boolean
+	isRestoring: boolean
+	session: { userId: string; activeOrganizationId: string } | null
+	user: { id: string } | null
+	org: { id: string } | null
+}
+
+type SearchResponse = {
+	data: {
+		results: Array<{ title: string; summary: string; chunks: never[] }>
+	}
+}
+
+const search = mock(
+	(): Promise<SearchResponse> => Promise.resolve({ data: { results: [] } }),
+)
+let auth: AuthState
+
+mock.module("@lib/api", () => ({ $fetch: search }))
+mock.module("@lib/auth-context", () => ({ useAuth: () => auth }))
+
+let usePersonalization: typeof import("./use-personalization").usePersonalization
+let clearPersonalizationCache: typeof import("./use-personalization").clearPersonalizationCache
+
+function settledAuth(userId: string, orgId: string): AuthState {
+	return {
+		isSessionPending: false,
+		isRestoring: false,
+		session: { userId, activeOrganizationId: orgId },
+		user: { id: userId },
+		org: { id: orgId },
+	}
+}
+
+function cacheKey(userId: string, orgId: string) {
+	return `sm_profession_v2:u:${encodeURIComponent(userId)}:o:${encodeURIComponent(orgId)}`
+}
+
+function cacheProfession(userId: string, orgId: string, profession: string) {
+	localStorage.setItem(
+		cacheKey(userId, orgId),
+		JSON.stringify({ profession, ts: Date.now() }),
+	)
+}
+
+function searchResponse(keyword: string): SearchResponse {
+	return {
+		data: {
+			results: [{ title: keyword, summary: "", chunks: [] }],
+		},
+	}
+}
+
+function deferred<T>() {
+	let resolve!: (value: T) => void
+	const promise = new Promise<T>((done) => {
+		resolve = done
+	})
+	return { promise, resolve }
+}
+
+beforeAll(async () => {
+	const window = new Window({ url: "https://app.supermemory.ai" })
+	Object.defineProperties(globalThis, {
+		window: { configurable: true, value: window },
+		document: { configurable: true, value: window.document },
+		localStorage: { configurable: true, value: window.localStorage },
+		navigator: { configurable: true, value: window.navigator },
+		HTMLElement: { configurable: true, value: window.HTMLElement },
+		Node: { configurable: true, value: window.Node },
+	})
+	;(
+		globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }
+	).IS_REACT_ACT_ENVIRONMENT = true
+	;({ usePersonalization, clearPersonalizationCache } = await import(
+		"./use-personalization"
+	))
+})
+
+afterEach(() => {
+	cleanup()
+	localStorage.clear()
+	search.mockReset()
+})
+
+describe("usePersonalization auth scoping", () => {
+	it("does not reuse account A's cache for account B", async () => {
+		auth = settledAuth("user-a", "shared-org")
+		cacheProfession("user-a", "shared-org", "developer")
+		search.mockResolvedValue(searchResponse("finance portfolio"))
+		const { result, rerender } = renderHook(() => usePersonalization())
+
+		await waitFor(() => expect(result.current.profession).toBe("developer"))
+		expect(search).not.toHaveBeenCalled()
+
+		auth = {
+			...settledAuth("user-b", "shared-org"),
+			isSessionPending: true,
+		}
+		rerender()
+		expect(result.current.profession).toBe("default")
+		expect(search).not.toHaveBeenCalled()
+
+		auth = settledAuth("user-b", "shared-org")
+		rerender()
+		expect(result.current.profession).toBe("default")
+		await waitFor(() => expect(result.current.profession).toBe("finance"))
+		expect(search).toHaveBeenCalledTimes(1)
+	})
+
+	it("resets to defaults without searching after logout", async () => {
+		auth = settledAuth("logout-user", "logout-org")
+		cacheProfession("logout-user", "logout-org", "developer")
+		const { result, rerender } = renderHook(() => usePersonalization())
+		await waitFor(() => expect(result.current.profession).toBe("developer"))
+
+		auth = {
+			isSessionPending: false,
+			isRestoring: false,
+			session: null,
+			user: null,
+			org: null,
+		}
+		rerender()
+
+		expect(result.current.profession).toBe("default")
+		expect(search).not.toHaveBeenCalled()
+	})
+
+	it("ignores account A's late result after switching to account B", async () => {
+		const accountA = deferred<ReturnType<typeof searchResponse>>()
+		const accountB = deferred<ReturnType<typeof searchResponse>>()
+		search
+			.mockImplementationOnce(() => accountA.promise)
+			.mockImplementationOnce(() => accountB.promise)
+		auth = settledAuth("deferred-a", "shared-org")
+		const { result, rerender } = renderHook(() => usePersonalization())
+		await waitFor(() => expect(search).toHaveBeenCalledTimes(1))
+
+		auth = settledAuth("deferred-b", "shared-org")
+		rerender()
+		expect(result.current.profession).toBe("default")
+		await waitFor(() => expect(search).toHaveBeenCalledTimes(2))
+
+		await act(async () => accountB.resolve(searchResponse("medical clinical")))
+		await waitFor(() => expect(result.current.profession).toBe("medical"))
+		await act(async () =>
+			accountA.resolve(searchResponse("software developer")),
+		)
+		expect(result.current.profession).toBe("medical")
+		expect(
+			JSON.parse(
+				localStorage.getItem(cacheKey("deferred-b", "shared-org")) ?? "{}",
+			).profession,
+		).toBe("medical")
+		expect(
+			localStorage.getItem(cacheKey("deferred-a", "shared-org")),
+		).toBeNull()
+	})
+
+	it("keeps a manual choice when an older detection resolves", async () => {
+		const pendingDetection = deferred<ReturnType<typeof searchResponse>>()
+		search.mockImplementationOnce(() => pendingDetection.promise)
+		auth = settledAuth("manual-race-user", "manual-race-org")
+		const { result } = renderHook(() => usePersonalization())
+		await waitFor(() => expect(search).toHaveBeenCalledTimes(1))
+
+		act(() => result.current.setProfession("marketing"))
+		expect(result.current.profession).toBe("marketing")
+		expect(
+			JSON.parse(
+				localStorage.getItem(cacheKey("manual-race-user", "manual-race-org")) ??
+					"{}",
+			).profession,
+		).toBe("marketing")
+
+		await act(async () =>
+			pendingDetection.resolve(searchResponse("software developer")),
+		)
+
+		expect(result.current.profession).toBe("marketing")
+		expect(
+			JSON.parse(
+				localStorage.getItem(cacheKey("manual-race-user", "manual-race-org")) ??
+					"{}",
+			).profession,
+		).toBe("marketing")
+	})
+
+	it("uses a fresh cache for the same account and org without searching", async () => {
+		auth = settledAuth("cached-user", "cached-org")
+		cacheProfession("cached-user", "cached-org", "research")
+		const { result } = renderHook(() => usePersonalization())
+
+		await waitFor(() => expect(result.current.profession).toBe("research"))
+		expect(search).not.toHaveBeenCalled()
+	})
+
+	it("writes manual profession changes only to the active scope", async () => {
+		auth = settledAuth("manual-user", "org-one")
+		cacheProfession("manual-user", "org-one", "developer")
+		cacheProfession("manual-user", "org-two", "finance")
+		const { result, rerender } = renderHook(() => usePersonalization())
+		await waitFor(() => expect(result.current.profession).toBe("developer"))
+
+		act(() => result.current.setProfession("marketing"))
+		expect(
+			JSON.parse(
+				localStorage.getItem(cacheKey("manual-user", "org-one")) ?? "{}",
+			).profession,
+		).toBe("marketing")
+
+		auth = settledAuth("manual-user", "org-two")
+		rerender()
+		await waitFor(() => expect(result.current.profession).toBe("finance"))
+		act(() => result.current.setProfession("medical"))
+
+		expect(
+			JSON.parse(
+				localStorage.getItem(cacheKey("manual-user", "org-one")) ?? "{}",
+			).profession,
+		).toBe("marketing")
+		expect(
+			JSON.parse(
+				localStorage.getItem(cacheKey("manual-user", "org-two")) ?? "{}",
+			).profession,
+		).toBe("medical")
+		expect(search).not.toHaveBeenCalled()
+	})
+
+	it("waits for an org switch to settle before reading or searching", async () => {
+		auth = settledAuth("org-user", "org-one")
+		cacheProfession("org-user", "org-one", "legal")
+		search.mockResolvedValue(searchResponse("figma product design"))
+		const { result, rerender } = renderHook(() => usePersonalization())
+		await waitFor(() => expect(result.current.profession).toBe("legal"))
+
+		auth = { ...auth, org: { id: "org-two" } }
+		rerender()
+		expect(result.current.profession).toBe("default")
+		expect(search).not.toHaveBeenCalled()
+
+		auth = settledAuth("org-user", "org-two")
+		rerender()
+		await waitFor(() => expect(result.current.profession).toBe("design"))
+		expect(search).toHaveBeenCalledTimes(1)
+	})
+
+	it("does not read the unscoped v1 cache", async () => {
+		auth = settledAuth("legacy-user", "legacy-org")
+		localStorage.setItem(
+			"sm_profession_v1",
+			JSON.stringify({ profession: "developer", ts: Date.now() }),
+		)
+		search.mockResolvedValue(searchResponse("finance investment"))
+		const { result } = renderHook(() => usePersonalization())
+
+		await waitFor(() => expect(result.current.profession).toBe("finance"))
+		expect(search).toHaveBeenCalledTimes(1)
+		expect(localStorage.getItem("sm_profession_v1")).toBeNull()
+	})
+
+	it("ignores inherited-property profession values in a scoped cache", async () => {
+		auth = settledAuth("malformed-user", "malformed-org")
+		cacheProfession("malformed-user", "malformed-org", "toString")
+		search.mockResolvedValue(searchResponse("finance investment"))
+		const { result } = renderHook(() => usePersonalization())
+
+		await waitFor(() => expect(result.current.profession).toBe("finance"))
+		expect(search).toHaveBeenCalledTimes(1)
+	})
+
+	it("clears every personalization cache without touching unrelated storage", () => {
+		localStorage.setItem("sm_profession_v1", "legacy")
+		localStorage.setItem(cacheKey("clear-a", "org-a"), "a")
+		localStorage.setItem(cacheKey("clear-b", "org-b"), "b")
+		localStorage.setItem("unrelated", "keep")
+
+		clearPersonalizationCache()
+
+		expect(localStorage.getItem("sm_profession_v1")).toBeNull()
+		expect(localStorage.getItem(cacheKey("clear-a", "org-a"))).toBeNull()
+		expect(localStorage.getItem(cacheKey("clear-b", "org-b"))).toBeNull()
+		expect(localStorage.getItem("unrelated")).toBe("keep")
+	})
+})
diff --git a/apps/web/hooks/use-personalization.ts b/apps/web/hooks/use-personalization.ts
index 619b3ac2..be4d5b1e 100644
--- a/apps/web/hooks/use-personalization.ts
+++ b/apps/web/hooks/use-personalization.ts
@@ -2,9 +2,11 @@
 
 import { useState, useEffect, useCallback } from "react"
 import { $fetch } from "@lib/api"
+import { useAuth } from "@lib/auth-context"
 import type { SearchResult } from "@repo/validation/api"
 
-const CACHE_KEY = "sm_profession_v1"
+const CACHE_KEY_PREFIX = "sm_profession_v2"
+const LEGACY_CACHE_KEY = "sm_profession_v1"
 const CACHE_TTL_MS = 7 * 24 * 60 * 60 * 1000
 
 export type Profession =
@@ -244,6 +246,60 @@ function defaultCopy(p: Profession): PersonalizedCopy {
 	}
 }
 
+const DEFAULT_COPY = defaultCopy("default")
+
+type PersonalizationState = {
+	scopeKey: string | null
+	copy: PersonalizedCopy
+	profession: Profession
+}
+
+function defaultState(scopeKey: string | null): PersonalizationState {
+	return { scopeKey, copy: DEFAULT_COPY, profession: "default" }
+}
+
+function getScopeKey(userId: string, orgId: string): string {
+	return `u:${encodeURIComponent(userId)}:o:${encodeURIComponent(orgId)}`
+}
+
+function getCacheKey(scopeKey: string): string {
+	return `${CACHE_KEY_PREFIX}:${scopeKey}`
+}
+
+function readCachedProfession(scopeKey: string): Profession | null {
+	try {
+		const raw = localStorage.getItem(getCacheKey(scopeKey))
+		if (!raw) return null
+		const cached = JSON.parse(raw) as {
+			profession?: unknown
+			ts?: unknown
+		}
+		const age = Date.now() - Number(cached.ts)
+		if (
+			typeof cached.profession !== "string" ||
+			!Object.hasOwn(COPY_POOLS, cached.profession) ||
+			typeof cached.ts !== "number" ||
+			!Number.isFinite(cached.ts) ||
+			age < 0 ||
+			age >= CACHE_TTL_MS
+		) {
+			return null
+		}
+		return cached.profession as Profession
+	} catch {
+		return null
+	}
+}
+
+function writeCachedProfession(scopeKey: string, profession: Profession) {
+	try {
+		localStorage.setItem(
+			getCacheKey(scopeKey),
+			JSON.stringify({ profession, ts: Date.now() }),
+		)
+	} catch {}
+}
+
 const sessionCopyCache: Partial<Record<Profession, PersonalizedCopy>> = {}
 
 function getSessionCopy(p: Profession): PersonalizedCopy {
@@ -399,96 +455,132 @@ function classifyProfession(results: SearchResult[]): Profession {
 	return best && best[1] > 0 ? best[0] : "default"
 }
 
-let inflightPromise: Promise<void> | null = null
+const inflightPromises = new Map<string, Promise<Profession | null>>()
+const manualSelectionVersions = new Map<string, number>()
+
+function detectProfession(scopeKey: string): Promise<Profession | null> {
+	const inflight = inflightPromises.get(scopeKey)
+	if (inflight) return inflight
+
+	const request = $fetch("@post/search", {
+		body: {
+			q: "career profession field industry background work role",
+			limit: 8,
+		},
+	})
+		.then((res) => {
+			const results = res.data?.results
+			if (!results?.length) return null
+			return classifyProfession(results)
+		})
+		.catch(() => null)
+
+	inflightPromises.set(scopeKey, request)
+	void request.finally(() => {
+		if (inflightPromises.get(scopeKey) === request) {
+			inflightPromises.delete(scopeKey)
+		}
+	})
+	return request
+}
 
 export function usePersonalization(): {
 	copy: PersonalizedCopy
 	profession: Profession
 	setProfession: (p: Profession) => void
 } {
-	const [copy, setCopy] = useState<PersonalizedCopy>(() =>
-		defaultCopy("default"),
+	const { isSessionPending, isRestoring, session, user, org } = useAuth()
+	const scopeKey =
+		!isSessionPending &&
+		!isRestoring &&
+		session &&
+		user &&
+		org &&
+		session.userId === user.id &&
+		session.activeOrganizationId === org.id
+			? getScopeKey(user.id, org.id)
+			: null
+	const [state, setState] = useState<PersonalizationState>(() =>
+		defaultState(null),
 	)
-	const [profession, setProfessionState] = useState<Profession>("default")
+	const visibleState =
+		state.scopeKey === scopeKey ? state : defaultState(scopeKey)
 
-	const setProfession = useCallback((p: Profession) => {
-		try {
-			localStorage.setItem(
-				CACHE_KEY,
-				JSON.stringify({ profession: p, ts: Date.now() }),
+	const setProfession = useCallback(
+		(p: Profession) => {
+			if (!scopeKey) return
+			manualSelectionVersions.set(
+				scopeKey,
+				(manualSelectionVersions.get(scopeKey) ?? 0) + 1,
 			)
-		} catch {}
-		// Re-pick on explicit change so the user sees fresh copy for the new identity
-		const freshCopy = pickCopy(p)
-		sessionCopyCache[p] = freshCopy
-		setCopy(freshCopy)
-		setProfessionState(p)
-	}, [])
+			writeCachedProfession(scopeKey, p)
+			// Re-pick on explicit change so the user sees fresh copy for the new identity
+			const freshCopy = pickCopy(p)
+			sessionCopyCache[p] = freshCopy
+			setState({ scopeKey, copy: freshCopy, profession: p })
+		},
+		[scopeKey],
+	)
 
 	useEffect(() => {
 		try {
-			const raw = localStorage.getItem(CACHE_KEY)
-			if (raw) {
-				const { profession: cached, ts } = JSON.parse(raw) as {
-					profession: Profession
-					ts: number
-				}
-				if (Date.now() - ts < CACHE_TTL_MS && COPY_POOLS[cached]) {
-					setCopy(getSessionCopy(cached))
-					setProfessionState(cached)
-					return
-				}
-			}
+			localStorage.removeItem(LEGACY_CACHE_KEY)
 		} catch {}
+		setState(defaultState(scopeKey))
+		if (!scopeKey) return
 
-		if (inflightPromise) {
-			inflightPromise.then(() => {
-				try {
-					const raw = localStorage.getItem(CACHE_KEY)
-					if (raw) {
-						const { profession: cached } = JSON.parse(raw) as {
-							profession: Profession
-						}
-						if (COPY_POOLS[cached]) {
-							setCopy(getSessionCopy(cached))
-							setProfessionState(cached)
-						}
-					}
-				} catch {}
+		const cached = readCachedProfession(scopeKey)
+		if (cached) {
+			setState({
+				scopeKey,
+				copy: getSessionCopy(cached),
+				profession: cached,
 			})
 			return
 		}
 
-		inflightPromise = $fetch("@post/search", {
-			body: {
-				q: "career profession field industry background work role",
-				limit: 8,
-			},
+		let cancelled = false
+		const manualSelectionVersion = manualSelectionVersions.get(scopeKey) ?? 0
+		void detectProfession(scopeKey).then((detected) => {
+			if (
+				cancelled ||
+				!detected ||
+				(manualSelectionVersions.get(scopeKey) ?? 0) !== manualSelectionVersion
+			) {
+				return
+			}
+			const cachedAfterRequest = readCachedProfession(scopeKey)
+			const resolvedProfession = cachedAfterRequest ?? detected
+			if (!cachedAfterRequest) {
+				writeCachedProfession(scopeKey, detected)
+			}
+			setState({
+				scopeKey,
+				copy: getSessionCopy(resolvedProfession),
+				profession: resolvedProfession,
+			})
 		})
-			.then((res) => {
-				const results = res.data?.results
-				if (!results?.length) return
-				const detected = classifyProfession(results)
-				try {
-					localStorage.setItem(
-						CACHE_KEY,
-						JSON.stringify({ profession: detected, ts: Date.now() }),
-					)
-				} catch {}
-				setCopy(getSessionCopy(detected))
-				setProfessionState(detected)
-			})
-			.catch(() => {})
-			.finally(() => {
-				inflightPromise = null
-			})
-	}, [])
+		return () => {
+			cancelled = true
+		}
+	}, [scopeKey])
 
-	return { copy, profession, setProfession }
+	return {
+		copy: visibleState.copy,
+		profession: visibleState.profession,
+		setProfession,
+	}
 }
 
 export function clearPersonalizationCache() {
 	try {
-		localStorage.removeItem(CACHE_KEY)
+		manualSelectionVersions.clear()
+		localStorage.removeItem(LEGACY_CACHE_KEY)
+		for (let index = localStorage.length - 1; index >= 0; index--) {
+			const key = localStorage.key(index)
+			if (key?.startsWith(`${CACHE_KEY_PREFIX}:`)) {
+				localStorage.removeItem(key)
+			}
+		}
 	} catch {}
 }
diff --git a/apps/web/package.json b/apps/web/package.json
index 63c4acee..baf29f73 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -120,12 +120,14 @@
     "@biomejs/biome": "^2.2.2",
     "@sentry/cli": "^2.52.0",
     "@tailwindcss/postcss": "^4.1.11",
+    "@testing-library/react": "^16.3.2",
     "@total-typescript/tsconfig": "^1.0.4",
     "@types/canvas-confetti": "^1.9.0",
     "@types/is-hotkey": "^0.1.10",
     "@types/node": "^24.0.4",
     "@types/react": "^19.2.9",
     "@types/react-dom": "^19.2.3",
+    "happy-dom": "^20.9.0",
     "tailwindcss": "^4.1.11",
     "typescript": "^5.8.3",
     "wrangler": "^4.26.0"
diff --git a/bun.lock b/bun.lock
index d55c8237..17e5232e 100644
--- a/bun.lock
+++ b/bun.lock
@@ -245,12 +245,14 @@
         "@biomejs/biome": "^2.2.2",
         "@sentry/cli": "^2.52.0",
         "@tailwindcss/postcss": "^4.1.11",
+        "@testing-library/react": "^16.3.2",
         "@total-typescript/tsconfig": "^1.0.4",
         "@types/canvas-confetti": "^1.9.0",
         "@types/is-hotkey": "^0.1.10",
         "@types/node": "^24.0.4",
         "@types/react": "^19.2.9",
         "@types/react-dom": "^19.2.3",
+        "happy-dom": "^20.9.0",
         "tailwindcss": "^4.1.11",
         "typescript": "^5.8.3",
         "wrangler": "^4.26.0",