diff --git a/src/index.ts b/src/index.ts
index da5e004..2f58473 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -59,7 +59,7 @@ export default Plugin.define({
             await quotaRegistration?.events.emit("updated", {});
         });
         quotaRegistration = await context.rpc.register(QuotaRpc, {
-            status: async ({ sessionID }) => (await quota.status(sessionID)) ?? null,
+            status: async () => quota.status() ?? null,
         });
         await quota.init();
         // Subscribe before the first read: configuration can publish its models while
diff --git a/src/quota-rpc.ts b/src/quota-rpc.ts
index 5e43e6f..c9b78bd 100644
--- a/src/quota-rpc.ts
+++ b/src/quota-rpc.ts
@@ -8,14 +8,13 @@ const window = z.object({
     used: z.number(),
     resetsAt: z.number(),
     remaining: z.number(),
-    sessionConsumed: z.number(),
 });
 
 export const QuotaRpc = Rpc.define({
     id: "stanp-opencode.quota",
     methods: {
         status: {
-            input: z.object({ sessionID: z.string() }),
+            input: z.object({}),
             output: z
                 .object({ plan: z.string(), fetchedAt: z.number(), windows: z.array(window) })
                 .nullable(),
diff --git a/src/quota.ts b/src/quota.ts
index 9eeea3b..3420249 100644
--- a/src/quota.ts
+++ b/src/quota.ts
@@ -54,7 +54,7 @@ export interface QuotaSnapshot {
 export interface QuotaStatus {
     plan: string;
     fetchedAt: number;
-    windows: Array<QuotaWindow & { remaining: number; sessionConsumed: number }>;
+    windows: Array<QuotaWindow & { remaining: number }>;
 }
 
 const storedState = z.object({
@@ -74,14 +74,8 @@ const storedState = z.object({
             ),
         })
         .optional(),
-    sessions: z.record(
-        z.string(),
-        z.record(
-            z.string(),
-            z.object({ resetsAt: z.number(), lastUsed: z.number(), consumed: z.number() }),
-        ),
-    ),
 });
+const legacyStoredState = storedState.extend({ sessions: z.unknown() });
 type StoredState = z.infer<typeof storedState>;
 
 function withoutExcludedState(state: StoredState): StoredState {
@@ -89,20 +83,10 @@ function withoutExcludedState(state: StoredState): StoredState {
     return {
         ...state,
         latest: state.latest && windows?.length ? { ...state.latest, windows } : undefined,
-        sessions: Object.fromEntries(
-            Object.entries(state.sessions).map(([session, tracked]) => [
-                session,
-                Object.fromEntries(
-                    Object.entries(tracked).filter(
-                        ([id]) => !isExcludedLimit(id.split(":", 1)[0], undefined),
-                    ),
-                ),
-            ]),
-        ),
     };
 }
 
-type QuotaContext = Pick<Plugin.Context, "integration" | "session" | "storage">;
+type QuotaContext = Pick<Plugin.Context, "integration" | "storage">;
 type QuotaFetch = (input: string | URL | Request, init?: RequestInit) => Promise<Response>;
 
 const quotaWindow = z.object({
@@ -239,7 +223,8 @@ export class QuotaTracker {
     private timer: ReturnType<typeof setInterval> | undefined;
     private request: Promise<QuotaSnapshot | undefined> | undefined;
     private readonly requests = new Set<Promise<QuotaSnapshot | undefined>>();
-    private readonly active = new Map<string, Set<string>>();
+    private readonly migrations = new Set<Promise<void>>();
+    private readonly active = new Set<string>();
     private controller: AbortController | undefined;
     private generation = 0;
     private disposed = false;
@@ -276,14 +261,22 @@ export class QuotaTracker {
             : (this.state?.account ?? (await fingerprint(`credential:${credential.refresh}`)));
         if (generation !== this.generation) return;
         if (this.state?.account !== account) {
-            const parsed = storedState.safeParse(await this.context.storage.get(STORAGE_KEY));
+            const value = await this.context.storage.get(STORAGE_KEY);
+            const parsed = storedState.safeParse(value);
             if (generation !== this.generation) return;
             const stored = parsed.success ? parsed.data : undefined;
             if (generation !== this.generation) return;
-            this.state =
-                stored?.account === account
-                    ? withoutExcludedState(stored)
-                    : { account, sessions: {} };
+            this.state = stored?.account === account ? withoutExcludedState(stored) : { account };
+            const legacy = legacyStoredState.safeParse(value);
+            if (stored?.account === account && legacy.success) {
+                const migration = this.persist();
+                this.migrations.add(migration);
+                try {
+                    await migration;
+                } finally {
+                    this.migrations.delete(migration);
+                }
+            }
         }
         if (generation !== this.generation) return;
         if (!this.timer) this.timer = setInterval(() => void this.refresh(), this.pollMs);
@@ -345,7 +338,7 @@ export class QuotaTracker {
             if (parsed.success && parsed.data.account_id) {
                 const account = await fingerprint(`account:${parsed.data.account_id}`);
                 if (generation !== this.generation || !this.state) return;
-                if (account !== this.state.account) this.state = { account, sessions: {} };
+                if (account !== this.state.account) this.state = { account };
             }
             const snapshot = normalizeQuota(payload);
             if (!snapshot) return;
@@ -360,102 +353,30 @@ export class QuotaTracker {
 
     private apply(snapshot: QuotaSnapshot) {
         if (!this.state) return;
-        for (const root of this.active.keys()) {
-            const tracked = (this.state.sessions[root] ??= {});
-            for (const window of snapshot.windows) {
-                const previous = tracked[window.id];
-                if (!previous) {
-                    tracked[window.id] = {
-                        resetsAt: window.resetsAt,
-                        lastUsed: window.used,
-                        consumed: 0,
-                    };
-                    continue;
-                }
-                if (previous.resetsAt !== window.resetsAt) {
-                    previous.resetsAt = window.resetsAt;
-                    previous.lastUsed = window.used;
-                    previous.consumed += window.used;
-                } else if (window.used >= previous.lastUsed) {
-                    previous.consumed += window.used - previous.lastUsed;
-                    previous.lastUsed = window.used;
-                }
-            }
-        }
         this.state.latest = snapshot;
     }
 
-    private async root(sessionID: string) {
-        let current = sessionID;
-        const seen = new Set<string>();
-        while (!seen.has(current)) {
-            seen.add(current);
-            const session = await this.context.session.get({ sessionID: current });
-            if (!session.parentID) return current;
-            current = session.parentID;
-        }
-        return sessionID;
-    }
-
     async start(sessionID: string) {
+        if (this.active.has(sessionID)) return;
         const generation = this.generation;
-        try {
-            const root = await this.root(sessionID);
-            if (generation !== this.generation) return;
-            const family = this.active.get(root);
-            if (family?.has(sessionID)) return;
-            const snapshot = await this.refresh();
-            if (!snapshot || !this.state || generation !== this.generation) return;
-            if (!family) {
-                const previous = this.state.sessions[root] ?? {};
-                this.state.sessions[root] = Object.fromEntries(
-                    snapshot.windows.map((window) => [
-                        window.id,
-                        {
-                            resetsAt: window.resetsAt,
-                            lastUsed: window.used,
-                            consumed: previous[window.id]?.consumed ?? 0,
-                        },
-                    ]),
-                );
-            }
-            await this.persist();
-            if (generation !== this.generation) return;
-            await this.changed();
-            if (generation !== this.generation) return;
-            const active = family ?? new Set<string>();
-            active.add(sessionID);
-            this.active.set(root, active);
-        } catch {
-            return;
-        }
+        const snapshot = await this.refresh();
+        if (!snapshot || generation !== this.generation) return;
+        this.active.add(sessionID);
     }
 
     async complete(sessionID: string) {
-        try {
-            const root = await this.root(sessionID);
-            const family = this.active.get(root);
-            if (!family?.has(sessionID)) return;
-            await this.refresh();
-            family.delete(sessionID);
-            if (family.size === 0) this.active.delete(root);
-            await this.persist();
-            await this.changed();
-        } catch {
-            return;
-        }
+        if (!this.active.delete(sessionID)) return;
+        await this.refresh();
     }
 
-    async status(sessionID: string): Promise<QuotaStatus | undefined> {
+    status(): QuotaStatus | undefined {
         if (!this.state?.latest) return;
-        const tracked = this.state.sessions[await this.root(sessionID)];
         return {
             plan: this.state.latest.plan,
             fetchedAt: this.state.latest.fetchedAt,
             windows: this.state.latest.windows.map((window) => ({
                 ...window,
                 remaining: Math.max(0, 100 - window.used),
-                sessionConsumed: tracked?.[window.id]?.consumed ?? 0,
             })),
         };
     }
@@ -465,10 +386,9 @@ export class QuotaTracker {
         const value: Schema.Json = this.state.latest
             ? {
                   account: this.state.account,
-                  sessions: this.state.sessions,
                   latest: this.state.latest,
               }
-            : { account: this.state.account, sessions: this.state.sessions };
+            : { account: this.state.account };
         await this.context.storage.set(STORAGE_KEY, value);
     }
 
@@ -478,6 +398,8 @@ export class QuotaTracker {
             this.controller?.abort();
             this.controller = undefined;
             this.request = undefined;
+            this.active.clear();
+            await Promise.all(this.migrations);
             if (this.state) await this.clear();
         }
         await this.refresh();
@@ -489,6 +411,6 @@ export class QuotaTracker {
         this.controller?.abort();
         if (this.timer) clearInterval(this.timer);
         this.timer = undefined;
-        await Promise.all(this.requests);
+        await Promise.all([...this.requests, ...this.migrations]);
     }
 }
diff --git a/src/tui.tsx b/src/tui.tsx
index 344c4f3..479788b 100644
--- a/src/tui.tsx
+++ b/src/tui.tsx
@@ -33,14 +33,11 @@ function resetTiming(resetsAt: number, now: number) {
     return `${minutes}m`;
 }
 
-export function formatQuotaWindow(
-    window: QuotaWindow & { remaining: number; sessionConsumed: number },
-    now = Date.now(),
-) {
+export function formatQuotaWindow(window: QuotaWindow & { remaining: number }, now = Date.now()) {
     const label = window.label
         ? `${window.label} ${duration(window.seconds)}`
         : duration(window.seconds);
-    return `${label}: ${percent(window.remaining)}% · ~${percent(window.sessionConsumed)}pp · ${resetTiming(window.resetsAt, now)}`;
+    return `${label}: ${percent(window.remaining)}% · ${resetTiming(window.resetsAt, now)}`;
 }
 
 export async function loadQuotaStatus(load: () => Promise<QuotaStatus | null>) {
@@ -66,7 +63,7 @@ export default Plugin.define({
         const Slot = (props: { sessionID: string }) => {
             const [status] = createResource(
                 () => `${props.sessionID}:${revision()}`,
-                () => loadQuotaStatus(() => quota.status({ sessionID: props.sessionID })),
+                () => loadQuotaStatus(() => quota.status({})),
             );
             return (
                 <Show when={status()}>
diff --git a/tests/quota.test.ts b/tests/quota.test.ts
index cd20e7d..ae536d8 100644
--- a/tests/quota.test.ts
+++ b/tests/quota.test.ts
@@ -173,10 +173,6 @@ function fixture(
     storageReads: Promise<Schema.Json | undefined>[] = [],
 ) {
     const stored = new Map<string, Schema.Json>();
-    const sessions = new Map([
-        ["root", {}],
-        ["child", { parentID: "root" }],
-    ]);
     let calls = 0;
     let storageCalls = 0;
     let changes = 0;
@@ -198,12 +194,6 @@ function fixture(
                     },
                 },
             } as never,
-            session: {
-                async get({ sessionID }: { sessionID: string }) {
-                    // SAFETY: QuotaTracker reads only parentID from this focused fixture.
-                    return sessions.get(sessionID) as never;
-                },
-            } as never,
             storage: {
                 async get(key: string) {
                     storageCalls++;
@@ -242,6 +232,7 @@ function fixture(
         storageCalls: () => storageCalls,
         changes: () => changes,
         headers,
+        stored,
         switch(credential: typeof current) {
             current = credential;
         },
@@ -256,7 +247,7 @@ async function accountFingerprint(id: string) {
     return Buffer.from(bytes).toString("hex");
 }
 
-test("removes cached Spark and representative reserve windows and consumption while offline", async () => {
+test("reads old cached snapshots without session estimates and removes excluded windows", async () => {
     const cached = {
         account: await accountFingerprint("account-one"),
         latest: {
@@ -331,22 +322,23 @@ test("removes cached Spark and representative reserve windows and consumption wh
     );
 
     await result.tracker.init();
-    const status = await result.tracker.status("root");
+    const status = result.tracker.status();
     expect(status?.windows.map((window) => window.id)).toEqual([
         "codex:primary",
         "codex_luna:primary",
     ]);
-    expect(status?.windows[0]?.sessionConsumed).toBe(2);
-    expect(status?.windows[1]?.sessionConsumed).toBe(3);
+    expect(status?.windows[0]).not.toHaveProperty("sessionConsumed");
+    expect(result.stored.get("chatgpt-quota")).not.toHaveProperty("sessions");
+    expect(result.calls()).toBe(0);
     await result.tracker.dispose();
 });
 
-test("activates only for OAuth and establishes an awaited root baseline shared by children", async () => {
+test("activates only for OAuth and refreshes quota at request start", async () => {
     const key = fixture({ type: "key", key: "secret" }, [plus]);
     await key.tracker.init();
     await key.tracker.start("root");
     expect(key.calls()).toBe(0);
-    expect(await key.tracker.status("root")).toBeUndefined();
+    expect(key.tracker.status()).toBeUndefined();
     await key.tracker.dispose();
 
     const oauth = fixture(
@@ -372,13 +364,14 @@ test("activates only for OAuth and establishes an awaited root baseline shared b
     expect(oauth.calls()).toBe(1);
     expect(oauth.headers[0]?.get("chatgpt-account-id")).toBe("account-one");
     await oauth.tracker.refresh();
-    const child = await oauth.tracker.status("child");
-    expect(child?.windows[0]?.sessionConsumed).toBe(5);
-    expect(child?.windows[0]?.remaining).toBe(82.5);
+    const status = oauth.tracker.status();
+    expect(status?.windows[0]?.remaining).toBe(82.5);
+    expect(status?.windows[0]).not.toHaveProperty("sessionConsumed");
+    expect(oauth.stored.get("chatgpt-quota")).not.toHaveProperty("sessions");
     await oauth.tracker.dispose();
 });
 
-test("polls, carries consumption across quota resets, tolerates errors, and clears on logout", async () => {
+test("polls, tolerates errors, and clears on logout", async () => {
     const reset = {
         ...plus,
         rate_limit: {
@@ -403,12 +396,12 @@ test("polls, carries consumption across quota resets, tolerates errors, and clea
     await result.tracker.init();
     await result.tracker.start("root");
     await Bun.sleep(35);
-    const status = await result.tracker.status("root");
+    const status = result.tracker.status();
     expect(result.calls()).toBeGreaterThanOrEqual(3);
-    expect(status?.windows[0]?.sessionConsumed).toBe(2);
+    expect(status?.windows[0]?.remaining).toBe(98);
     result.logout();
     await result.tracker.authChanged(true);
-    expect(await result.tracker.status("root")).toBeUndefined();
+    expect(result.tracker.status()).toBeUndefined();
     const calls = result.calls();
     await result.tracker.dispose();
     await Bun.sleep(20);
@@ -424,12 +417,11 @@ test("sidebar text places reset timing beside latest remaining quota", () => {
                 label: null,
                 used: 25,
                 remaining: 75,
-                sessionConsumed: 1.5,
                 resetsAt: 100_000 + 2 * 86_400_000 + 5 * 3_600_000,
             },
             100_000,
         ),
-    ).toBe("7d: 75% · ~1.5pp · 2d 5h");
+    ).toBe("7d: 75% · 2d 5h");
 });
 
 test("sidebar reset timing uses compact future units and handles boundaries", () => {
@@ -442,17 +434,16 @@ test("sidebar reset timing uses compact future units and handles boundaries", ()
                 label: null,
                 used: 25,
                 remaining: 75,
-                sessionConsumed: 1.5,
                 resetsAt: now + resetIn,
             },
             now,
         );
 
-    expect(format(2 * 3_600_000 + 15 * 60_000)).toBe("5h: 75% · ~1.5pp · 2h 15m");
-    expect(format(3_600_000)).toBe("5h: 75% · ~1.5pp · 1h");
-    expect(format(15 * 60_000)).toBe("5h: 75% · ~1.5pp · 15m");
-    expect(format(60_000)).toBe("5h: 75% · ~1.5pp · 1m");
-    expect(format(59_999)).toBe("5h: 75% · ~1.5pp · <1m");
+    expect(format(2 * 3_600_000 + 15 * 60_000)).toBe("5h: 75% · 2h 15m");
+    expect(format(3_600_000)).toBe("5h: 75% · 1h");
+    expect(format(15 * 60_000)).toBe("5h: 75% · 15m");
+    expect(format(60_000)).toBe("5h: 75% · 1m");
+    expect(format(59_999)).toBe("5h: 75% · <1m");
 });
 
 test("sidebar reset timing preserves labels and distinguishes stale and unavailable timestamps", () => {
@@ -462,17 +453,16 @@ test("sidebar reset timing preserves labels and distinguishes stale and unavaila
         label: "GPT-5.6 Luna",
         used: 99.95,
         remaining: 0.05,
-        sessionConsumed: 1.5,
     };
     expect(formatQuotaWindow({ ...window, resetsAt: 999 }, 1_000)).toBe(
-        "GPT-5.6 Luna 5h: <0.1% · ~1.5pp · due",
+        "GPT-5.6 Luna 5h: <0.1% · due",
     );
     expect(formatQuotaWindow({ ...window, resetsAt: Number.NaN }, 1_000)).toBe(
-        "GPT-5.6 Luna 5h: <0.1% · ~1.5pp · unavailable",
+        "GPT-5.6 Luna 5h: <0.1% · unavailable",
     );
 });
 
-test("inactive roots freeze, resume from a cached baseline on failure, and deactivate by family", async () => {
+test("request completion refreshes once across terminal and idle events", async () => {
     const used = (percent: number) => ({
         ...plus,
         rate_limit: {
@@ -492,16 +482,10 @@ test("inactive roots freeze, resume from a cached baseline on failure, and deact
     await result.tracker.init();
     await result.tracker.start("root");
     await result.tracker.complete("root");
-    expect((await result.tracker.status("root"))?.windows[0]?.sessionConsumed).toBe(1);
-    await result.tracker.refresh();
-    expect((await result.tracker.status("root"))?.windows[0]?.sessionConsumed).toBe(1);
-
-    await result.tracker.start("root");
-    await result.tracker.start("child");
+    expect(result.tracker.status()?.windows[0]?.remaining).toBe(89);
     await result.tracker.complete("root");
-    await result.tracker.refresh();
-    await result.tracker.complete("child");
-    expect((await result.tracker.status("root"))?.windows[0]?.sessionConsumed).toBe(6);
+    expect(result.calls()).toBe(2);
+    expect(result.tracker.status()?.windows[0]?.remaining).toBe(89);
     await result.tracker.dispose();
 });
 
@@ -542,10 +526,10 @@ test("an auth switch detaches an in-flight old-account response and immediately
     expect(result.calls()).toBe(2);
     pending.resolve(plus);
     await old;
-    expect((await result.tracker.status("root"))?.windows[0]?.used).toBe(70);
+    expect(result.tracker.status()?.windows[0]?.used).toBe(70);
     expect(result.headers[1]?.get("chatgpt-account-id")).toBe("account-two");
     await result.tracker.refresh();
-    expect((await result.tracker.status("root"))?.windows[0]?.sessionConsumed).toBe(0);
+    expect(result.tracker.status()?.windows[0]).not.toHaveProperty("sessionConsumed");
     await result.tracker.dispose();
 });
 
@@ -577,7 +561,7 @@ test("an auth switch during an old account storage read cannot restore stale sta
     expect(result.calls()).toBe(1);
     pending.resolve(undefined);
     await old;
-    expect((await result.tracker.status("root"))?.windows[0]?.used).toBe(64);
+    expect(result.tracker.status()?.windows[0]?.used).toBe(64);
     expect(result.headers[0]?.get("chatgpt-account-id")).toBe("account-two");
     await result.tracker.dispose();
 });
diff --git a/tests/tui.test.ts b/tests/tui.test.ts
index 10552b8..9d3a26f 100644
--- a/tests/tui.test.ts
+++ b/tests/tui.test.ts
@@ -18,7 +18,6 @@ const status = (plan: string, remaining: number): QuotaStatus => ({
             used: 100 - remaining,
             resetsAt: 2,
             remaining,
-            sessionConsumed: 1.5,
         },
     ],
 });
@@ -32,13 +31,13 @@ test("built quota slot stays reactive across pending, empty, failure, update, an
     const { default: plugin } = tui;
     const pending = Promise.withResolvers<QuotaStatus | null>();
     const responses: Array<() => Promise<QuotaStatus | null>> = [() => pending.promise];
-    const sessions: string[] = [];
+    let statusCalls = 0;
     let slotRender: SlotRender | undefined;
     let notifyUpdated: (() => void) | undefined;
 
     const quota = {
-        status(input: { sessionID: string }) {
-            sessions.push(input.sessionID);
+        status() {
+            statusCalls++;
             const response = responses.shift();
             if (!response) throw new Error("Missing test response");
             return response();
@@ -84,7 +83,8 @@ test("built quota slot stays reactive across pending, empty, failure, update, an
 
         pending.resolve(status("plus", 75));
         await setup.waitForFrame((frame) => frame.includes("ChatGPT quota (plus)"));
-        expect(setup.captureCharFrame()).toContain("5h: 75% · ~1.5pp · due");
+        expect(setup.captureCharFrame()).toContain("5h: 75% · due");
+        expect(setup.captureCharFrame()).not.toContain("~");
 
         responses.push(async () => null);
         notifyUpdated();
@@ -94,13 +94,13 @@ test("built quota slot stays reactive across pending, empty, failure, update, an
             throw new Error("disconnected");
         });
         notifyUpdated();
-        await setup.waitFor(() => sessions.length === 3);
+        await setup.waitFor(() => statusCalls === 3);
         expect(setup.captureCharFrame()).not.toContain("ChatGPT quota");
 
         responses.push(async () => status("pro", 42));
         setSessionID("session-two");
         await setup.waitForFrame((frame) => frame.includes("ChatGPT quota (pro)"));
-        expect(sessions).toEqual(["session-one", "session-one", "session-one", "session-two"]);
+        expect(statusCalls).toBe(4);
     } finally {
         setup.renderer.destroy();
         if (cleanup) await cleanup();