Fix Codex auth import and reset credit details

# Conflicts:
#	app/(tabs)/codex.tsx
#	app/(tabs)/index.tsx
#	app/(tabs)/settings.tsx
#	hooks/useCodexUsage.ts
#	lib/api/codexApi.ts
#	package-lock.json
#	package.json

app/(tabs)/codex.tsx

@@ -15,6 +15,44 @@ import { LastUpdated } from "@/components/LastUpdated";
 import { ScreenErrorBoundary } from "@/components/ScreenErrorBoundary";
 import { COLORS } from "@/lib/constants";
 import { windowLabel } from "@/lib/timeUtils";
+import type { CodexResetCredit } from "@/types/codex";
+
+function formatResetStatus(status?: string) {
+  if (!status) return "Unknown";
+  return status.replace(/_/g, " ").replace(/\b\w/g, (char) => char.toUpperCase());
+}
+
+function ResetCreditRow({ credit }: { credit: CodexResetCredit }) {
+  return (
+    <View className="mt-2 rounded-xl bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-700 p-3">
+      <View className="flex-row items-center justify-between mb-1.5">
+        <Text className="text-sm font-semibold text-neutral-900 dark:text-white">
+          Credit {credit.index}
+        </Text>
+        <View className="px-2 py-0.5 rounded-full bg-green-100 dark:bg-green-900/30">
+          <Text className="text-[11px] font-semibold text-green-700 dark:text-green-300">
+            {formatResetStatus(credit.status)}
+          </Text>
+        </View>
+      </View>
+      {credit.timeUntilExpiry && (
+        <Text className="text-sm text-neutral-700 dark:text-neutral-300">
+          Expires in {credit.timeUntilExpiry}
+        </Text>
+      )}
+      {credit.expiresAtLocal && (
+        <Text className="text-xs text-neutral-500 dark:text-neutral-400 mt-1">
+          Expires {credit.expiresAtLocal}
+        </Text>
+      )}
+      {credit.grantedAtLocal && (
+        <Text className="text-xs text-neutral-500 dark:text-neutral-400 mt-1">
+          Granted {credit.grantedAtLocal}
+        </Text>
+      )}
+    </View>
+  );
+}
 
 function CodexTabContent() {
   const {
@@ -28,6 +66,9 @@ function CodexTabContent() {
     clearAuth,
   } =
     useCodexUsage();
+  const resetCoupons = usage?.resetCoupons;
+  const availableResetCredits =
+    resetCoupons?.credits?.filter((credit) => credit.status === "available") ?? [];
 
   return (
     <SafeAreaView
@@ -134,21 +175,25 @@ function CodexTabContent() {
               <View className="flex-row items-center mb-5">
                 <View className="px-2.5 py-1 rounded-full bg-green-100 dark:bg-green-900/40">
                   <Text className="text-xs font-semibold text-green-700 dark:text-green-300 capitalize">
-                    {usage.plan_type}
+                    {usage.planType ?? "codex"}
                   </Text>
                 </View>
               </View>
 
+              {usage.primary && (
                 <UsageStat
-                label={`Primary (${windowLabel(usage.rate_limit.primary_window.limit_window_seconds)})`}
-                percent={usage.rate_limit.primary_window.used_percent}
-                resetAtSeconds={usage.rate_limit.primary_window.reset_at}
+                  label={`Primary (${windowLabel(usage.primary.windowSeconds)})`}
+                  percent={usage.primary.usedPercent}
+                  resetAtSeconds={usage.primary.resetsAt}
                 />
+              )}
+              {usage.secondary && (
                 <UsageStat
-                label={`Secondary (${windowLabel(usage.rate_limit.secondary_window.limit_window_seconds)})`}
-                percent={usage.rate_limit.secondary_window.used_percent}
-                resetAtSeconds={usage.rate_limit.secondary_window.reset_at}
+                  label={`Secondary (${windowLabel(usage.secondary.windowSeconds)})`}
+                  percent={usage.secondary.usedPercent}
+                  resetAtSeconds={usage.secondary.resetsAt}
                 />
+              )}
 
               {/* Credits */}
               <View className="mt-1 p-3.5 rounded-xl bg-neutral-50 dark:bg-neutral-800 border border-neutral-100 dark:border-neutral-700">
@@ -162,7 +207,7 @@ function CodexTabContent() {
                       Unlimited
                     </Text>
                   </View>
-                ) : usage.credits.has_credits ? (
+                ) : usage.credits.hasCredits ? (
                   <Text className="text-sm font-semibold text-neutral-900 dark:text-white">
                     ${Number(usage.credits.balance).toFixed(2)} remaining
                   </Text>
@@ -170,6 +215,47 @@ function CodexTabContent() {
                   <Text className="text-sm text-neutral-400">No credits</Text>
                 )}
               </View>
+
+              {resetCoupons && (
+                <View className="mt-3 p-3.5 rounded-xl bg-neutral-50 dark:bg-neutral-800 border border-neutral-100 dark:border-neutral-700">
+                  <Text className="text-xs font-semibold uppercase tracking-widest text-neutral-400 mb-2">
+                    Reset Credits
+                  </Text>
+                  <Text className="text-sm font-semibold text-neutral-900 dark:text-white">
+                    {resetCoupons.availableCount ?? 0} available
+                  </Text>
+                  {typeof resetCoupons.totalEarnedCount === "number" && (
+                    <Text className="text-xs text-neutral-500 dark:text-neutral-400 mt-1">
+                      {resetCoupons.totalEarnedCount} earned total
+                    </Text>
+                  )}
+                  {resetCoupons.nextExpiringCredit?.expiresAtLocal && (
+                    <Text className="text-xs text-neutral-500 dark:text-neutral-400 mt-1">
+                      Next expires {resetCoupons.nextExpiringCredit.expiresAtLocal}
+                    </Text>
+                  )}
+                  {resetCoupons.nextExpiringCredit?.timeUntilExpiry && (
+                    <Text className="text-xs text-neutral-400 dark:text-neutral-500 mt-0.5">
+                      In {resetCoupons.nextExpiringCredit.timeUntilExpiry}
+                    </Text>
+                  )}
+                  {availableResetCredits.length > 0 && (
+                    <View className="mt-3 pt-3 border-t border-neutral-200 dark:border-neutral-700">
+                      <Text className="text-xs font-semibold uppercase tracking-widest text-neutral-400 mb-1">
+                        Available Now
+                      </Text>
+                      {availableResetCredits.map((credit) => (
+                        <ResetCreditRow key={`${credit.index}-${credit.expiresAt ?? "none"}`} credit={credit} />
+                      ))}
+                    </View>
+                  )}
+                  {resetCoupons.source !== "live_api" && (
+                    <Text className="text-xs text-neutral-400 dark:text-neutral-500 mt-3">
+                      Source: {resetCoupons.sourceDescription}
+                    </Text>
+                  )}
+                </View>
+              )}
               <View className="mt-4 border-t border-neutral-100 pt-3 dark:border-neutral-800">
                 <LastUpdated timestamp={lastFetchedAt} />
               </View>

app/(tabs)/index.tsx

@@ -16,6 +16,7 @@ import { onUsageDataLoaded } from "@/lib/notifications";
 import { ProgressBar } from "@/components/ProgressBar";
 import { ResetCountdown } from "@/components/ResetCountdown";
 import { LastUpdated } from "@/components/LastUpdated";
+import { ErrorMessage } from "@/components/ErrorMessage";
 import { ScreenErrorBoundary } from "@/components/ScreenErrorBoundary";
 import { COLORS, getUsageColor } from "@/lib/constants";
 import { windowLabel } from "@/lib/timeUtils";
@@ -158,17 +159,17 @@ function DashboardTabContent() {
                 </Text>
               </View>
               <View className="flex-row items-center gap-x-2">
-                {codex.usage?.plan_type && (
+                {codex.usage?.planType && (
                   <View className="px-2.5 py-1 rounded-full bg-green-100 dark:bg-green-900/30">
                     <Text className="text-xs font-semibold text-green-700 dark:text-green-300 capitalize">
-                      {codex.usage.plan_type}
+                      {codex.usage.planType}
                     </Text>
                   </View>
                 )}
                 {codex.auth && codex.status === "error" && (
                   <View className="w-2 h-2 rounded-full bg-red-500" />
                 )}
-                {codex.status === "success" && !codex.usage?.plan_type && (
+                {codex.status === "success" && !codex.usage?.planType && (
                   <View className="w-2 h-2 rounded-full bg-green-500" />
                 )}
               </View>
@@ -184,31 +185,26 @@ function DashboardTabContent() {
               />
             )}
             {codex.auth && codex.status === "error" && (
-              <View className="flex-row items-center gap-x-2 py-1">
-                <MaterialIcons name="error-outline" size={16} color="#ef4444" />
-                <Text className="text-sm text-red-500 dark:text-red-400">
-                  Failed to fetch usage
-                </Text>
-              </View>
+              <ErrorMessage message={codex.error} />
             )}
             {codex.usage && (
               <View>
+                {codex.usage.primary && (
                   <UsageRow
-                  label={`${windowLabel(codex.usage.rate_limit.primary_window.limit_window_seconds)} window`}
-                  percent={codex.usage.rate_limit.primary_window.used_percent}
-                  resetAtSeconds={codex.usage.rate_limit.primary_window.reset_at}
+                    label={`${windowLabel(codex.usage.primary.windowSeconds)} window`}
+                    percent={codex.usage.primary.usedPercent}
+                    resetAtSeconds={codex.usage.primary.resetsAt}
                   />
+                )}
+                {codex.usage.secondary && (
                   <UsageRow
-                  label={`${windowLabel(codex.usage.rate_limit.secondary_window.limit_window_seconds)} window`}
-                  percent={
-                    codex.usage.rate_limit.secondary_window.used_percent
-                  }
-                  resetAtSeconds={
-                    codex.usage.rate_limit.secondary_window.reset_at
-                  }
+                    label={`${windowLabel(codex.usage.secondary.windowSeconds)} window`}
+                    percent={codex.usage.secondary.usedPercent}
+                    resetAtSeconds={codex.usage.secondary.resetsAt}
                   />
+                )}
                 {!codex.usage.credits.unlimited &&
-                  codex.usage.credits.has_credits && (
+                  codex.usage.credits.hasCredits && (
                     <View className="pt-3 border-t border-neutral-100 dark:border-neutral-800 flex-row items-center gap-x-2">
                       <MaterialIcons name="toll" size={14} color="#a3a3a3" />
                       <Text className="text-xs text-neutral-500 dark:text-neutral-400">
@@ -230,6 +226,22 @@ function DashboardTabContent() {
                   </View>
                 )}
                 <View className="mt-3 border-t border-neutral-100 pt-3 dark:border-neutral-800">
+                  {!!codex.usage.resetCoupons && (
+                    <View className="mb-3">
+                      <View className="flex-row items-center gap-x-2">
+                        <MaterialIcons name="restart-alt" size={14} color={COLORS.codex} />
+                        <Text className="text-xs text-neutral-500 dark:text-neutral-400">
+                          {codex.usage.resetCoupons.availableCount ?? 0} reset credits
+                          available
+                        </Text>
+                      </View>
+                      {!!codex.usage.resetCoupons.nextExpiringCredit?.timeUntilExpiry && (
+                        <Text className="text-xs text-neutral-400 dark:text-neutral-500 mt-1">
+                          Next expires in {codex.usage.resetCoupons.nextExpiringCredit.timeUntilExpiry}
+                        </Text>
+                      )}
+                    </View>
+                  )}
                   <LastUpdated timestamp={codex.lastFetchedAt} />
                 </View>
               </View>
@@ -271,12 +283,7 @@ function DashboardTabContent() {
               />
             )}
             {claude.auth && claude.status === "error" && (
-              <View className="flex-row items-center gap-x-2 py-1">
-                <MaterialIcons name="error-outline" size={16} color="#ef4444" />
-                <Text className="text-sm text-red-500 dark:text-red-400">
-                  Failed to fetch usage
-                </Text>
-              </View>
+              <ErrorMessage message={claude.error} />
             )}
             {claude.usage && (
               <View>

app/(tabs)/settings.tsx

@@ -35,6 +35,12 @@ import { ScreenErrorBoundary } from "@/components/ScreenErrorBoundary";
 import type { CodexAuth } from "@/types/codex";
 import Constants from "expo-constants";
 
+function humanizeImportError(code: string): string {
+  if (code === "DOCUMENT_NOT_READABLE") {
+    return "The selected file could not be read. Try copying auth.json into Files or Downloads and import it again.";
+  }
+  return code;
+}
 function SettingRow({
   icon,
   label,
@@ -160,7 +166,7 @@ function SettingsTabContent() {
     } catch (e: unknown) {
       const msg = e instanceof Error ? e.message : "UNKNOWN_ERROR";
       if (msg !== "PICKER_CANCELLED") {
-        Alert.alert("Import failed", msg);
+        Alert.alert("Import failed", humanizeImportError(msg));
       }
     }
   };

app/onboarding/codex.tsx

@@ -8,6 +8,13 @@ import { saveCodexAuth, loadCodexAuth } from "@/lib/storage";
 import type { CodexAuth } from "@/types/codex";
 import { COLORS } from "@/lib/constants";
 
+function humanizeImportError(code: string): string {
+  if (code === "DOCUMENT_NOT_READABLE") {
+    return "The selected file could not be read. Try copying auth.json into Files or Downloads and import it again.";
+  }
+  return code;
+}
+
 export default function OnboardingCodexScreen() {
   const [auth, setAuth] = useState<CodexAuth | null>(null);
   const [loading, setLoading] = useState(false);
@@ -28,7 +35,7 @@ export default function OnboardingCodexScreen() {
       setAuth(parsed);
     } catch (e: unknown) {
       const msg = e instanceof Error ? e.message : "UNKNOWN_ERROR";
-      if (msg !== "PICKER_CANCELLED") setError(msg);
+      if (msg !== "PICKER_CANCELLED") setError(humanizeImportError(msg));
     } finally {
       setLoading(false);
     }
@@ -86,7 +93,7 @@ export default function OnboardingCodexScreen() {
                 <MaterialIcons name="check-circle" size={22} color={COLORS.codex} />
               </View>
               <View className="flex-1">
-                <Text className="text-white font-semibold">Connected</Text>
+                <Text className="text-white font-semibold">Imported</Text>
                 {auth.accountId && (
                   <Text className="text-neutral-500 text-sm font-mono">
                     {auth.accountId.slice(0, 12)}…

app/onboarding/done.tsx

@@ -77,7 +77,7 @@ export default function OnboardingDoneScreen() {
                 Codex CLI
               </Text>
               <Text className="text-neutral-600 text-sm">
-                {codexConfigured ? "Connected" : "Not configured"}
+                {codexConfigured ? "Auth imported" : "Not configured"}
               </Text>
             </View>
           </View>
@@ -105,7 +105,7 @@ export default function OnboardingDoneScreen() {
                 Claude.ai
               </Text>
               <Text className="text-neutral-600 text-sm">
-                {claudeConfigured ? "Connected" : "Not configured"}
+                {claudeConfigured ? "Session saved" : "Not configured"}
               </Text>
             </View>
           </View>

components/ErrorMessage.tsx

@@ -4,6 +4,8 @@ const ERROR_MESSAGES: Record<string, string> = {
   TOKEN_EXPIRED: "Your session token has expired. Please reconfigure.",
   MISSING_ACCESS_TOKEN: "auth.json is missing the accessToken field.",
   INVALID_JSON: "The selected file is not valid JSON.",
+  DOCUMENT_NOT_READABLE:
+    "The selected file could not be read. Try copying auth.json into Files or Downloads and import it again.",
   NO_ORGS_FOUND: "No Claude organizations found for this session key.",
   INVALID_CODEX_RESPONSE:
     "Codex returned an unexpected response. The app was kept safe from invalid data.",
@@ -11,11 +13,23 @@ const ERROR_MESSAGES: Record<string, string> = {
     "Claude returned an unexpected usage response. The app was kept safe from invalid data.",
   INVALID_CLAUDE_ORGS_RESPONSE:
     "Claude returned an unexpected organizations response.",
+  UNKNOWN_ERROR: "An unknown error occurred. Try refreshing.",
 };
 
 function humanize(code: string): string {
   if (code.startsWith("HTTP_ERROR_")) {
-    return `Unexpected server error (HTTP ${code.replace("HTTP_ERROR_", "")}).`;
+    const status = code.replace("HTTP_ERROR_", "");
+    if (status === "429") return "Rate limited by the server. Try again shortly.";
+    if (status === "500" || status === "502" || status === "503")
+      return `Server error (${status}). The service may be down.`;
+    return `Unexpected server response (HTTP ${status}).`;
+  }
+  if (
+    code === "Network request failed" ||
+    code.includes("fetch") ||
+    code.includes("network")
+  ) {
+    return "Network error. Check your internet connection and try again.";
   }
   return ERROR_MESSAGES[code] ?? `Unexpected error: ${code}`;
 }

hooks/useCodexUsage.ts

@@ -19,10 +19,7 @@ type Status = "idle" | "loading" | "success" | "error";
 
 function shouldRetry(error: unknown): boolean {
   const message = error instanceof Error ? error.message : "";
-  return (
-    message !== "TOKEN_EXPIRED" &&
-    message !== "INVALID_CODEX_RESPONSE"
-  );
+  return message !== "TOKEN_EXPIRED" && message !== "INVALID_CODEX_RESPONSE";
 }
 
 function wait(ms: number): Promise<void> {
@@ -82,14 +79,6 @@ export function useCodexUsage() {
       } catch (caught: unknown) {
         if (version !== requestVersion.current) return;
         const message = caught instanceof Error ? caught.message : "UNKNOWN_ERROR";
-        if (message === "TOKEN_EXPIRED") {
-          await clearCodexAuth();
-          if (mounted.current) {
-            setAuth(null);
-            setUsage(null);
-            setLastFetchedAt(null);
-          }
-        }
         if (mounted.current) {
           setError(message);
           setStatus("error");

lib/api/codexApi.ts

@@ -1,66 +1,86 @@
 import type { CodexAuth, CodexUsageResponse } from "@/types/codex";
 
 const USAGE_URL = "https://chatgpt.com/backend-api/wham/usage";
+const RESET_CREDITS_URL =
+  "https://chatgpt.com/backend-api/wham/rate-limit-reset-credits";
+
+interface RawUsageWindow {
+  used_percent?: number;
+  limit_window_seconds?: number;
+  reset_at?: number;
+}
+
+interface RawUsageResponse {
+  plan_type?: string | null;
+  rate_limit?: {
+    primary_window?: RawUsageWindow | null;
+    secondary_window?: RawUsageWindow | null;
+  } | null;
+  credits?: {
+    has_credits?: boolean;
+    unlimited?: boolean;
+    balance?: string | number;
+  } | null;
+  rate_limit_reached_type?: string | null;
+  rate_limit_reset_credits?: {
+    available_count?: number | null;
+  } | null;
+}
+
+interface RawResetCredit {
+  status?: string;
+  granted_at?: string | null;
+  expires_at?: string | null;
+}
+
+interface RawResetCreditsResponse {
+  available_count?: number | null;
+  total_earned_count?: number | null;
+  credits?: RawResetCredit[] | null;
+}
 
 function isNumber(value: unknown): value is number {
   return typeof value === "number" && Number.isFinite(value);
 }
 
-export function parseCodexUsageResponse(data: unknown): CodexUsageResponse {
-  if (!data || typeof data !== "object") {
-    throw new Error("INVALID_CODEX_RESPONSE");
+function formatDurationUntil(isoString: string | null | undefined): string | null {
+  if (!isoString) return null;
+
+  const targetMs = new Date(isoString).getTime();
+  if (Number.isNaN(targetMs)) return null;
+
+  let remainingSeconds = Math.max(Math.round((targetMs - Date.now()) / 1000), 0);
+  const days = Math.floor(remainingSeconds / 86400);
+  remainingSeconds -= days * 86400;
+  const hours = Math.floor(remainingSeconds / 3600);
+  remainingSeconds -= hours * 3600;
+  const minutes = Math.floor(remainingSeconds / 60);
+  remainingSeconds -= minutes * 60;
+
+  const parts: string[] = [];
+  if (days > 0) parts.push(`${days}d`);
+  if (hours > 0) parts.push(`${hours}h`);
+  if (minutes > 0) parts.push(`${minutes}m`);
+  if (remainingSeconds > 0 || parts.length === 0) parts.push(`${remainingSeconds}s`);
+  return parts.join(" ");
 }
 
-  const value = data as Record<string, unknown>;
-  const rateLimit = value.rate_limit as Record<string, unknown> | undefined;
-  const primary = rateLimit?.primary_window as Record<string, unknown> | undefined;
-  const secondary = rateLimit?.secondary_window as Record<string, unknown> | undefined;
-  const credits = value.credits as Record<string, unknown> | undefined;
+function normalizeWindow(window: RawUsageWindow | null | undefined) {
+  if (!window) return null;
 
-  const validWindow = (window: Record<string, unknown> | undefined) =>
-    !!window &&
-    isNumber(window.used_percent) &&
-    isNumber(window.reset_at) &&
-    isNumber(window.limit_window_seconds);
-
-  if (
-    typeof value.plan_type !== "string" ||
-    !validWindow(primary) ||
-    !validWindow(secondary) ||
-    !credits ||
-    typeof credits.has_credits !== "boolean" ||
-    typeof credits.unlimited !== "boolean" ||
-    !isNumber(credits.balance)
-  ) {
-    throw new Error("INVALID_CODEX_RESPONSE");
-  }
-
-  const primaryWindow = primary as Record<string, unknown>;
-  const secondaryWindow = secondary as Record<string, unknown>;
+  const windowSeconds =
+    typeof window.limit_window_seconds === "number" ? window.limit_window_seconds : 0;
+  const resetsAt = typeof window.reset_at === "number" ? window.reset_at : 0;
 
   return {
-    plan_type: value.plan_type,
-    rate_limit: {
-      primary_window: {
-        used_percent: primaryWindow.used_percent as number,
-        reset_at: primaryWindow.reset_at as number,
-        limit_window_seconds: primaryWindow.limit_window_seconds as number,
-      },
-      secondary_window: {
-        used_percent: secondaryWindow.used_percent as number,
-        reset_at: secondaryWindow.reset_at as number,
-        limit_window_seconds: secondaryWindow.limit_window_seconds as number,
-      },
-    },
-    credits: {
-      has_credits: credits.has_credits,
-      unlimited: credits.unlimited,
-      balance: credits.balance,
-    },
+    usedPercent: typeof window.used_percent === "number" ? window.used_percent : 0,
+    resetsAt,
+    windowMinutes: Math.round(windowSeconds / 60),
+    windowSeconds,
   };
 }
 
-export async function fetchCodexUsage(auth: CodexAuth): Promise<CodexUsageResponse> {
+function buildBaseHeaders(auth: CodexAuth): Record<string, string> {
   const headers: Record<string, string> = {
     Authorization: `Bearer ${auth.accessToken}`,
     "Content-Type": "application/json",
@@ -70,6 +90,103 @@ export async function fetchCodexUsage(auth: CodexAuth): Promise<CodexUsageRespon
     headers["ChatGPT-Account-Id"] = auth.accountId;
   }
 
+  return headers;
+}
+
+async function fetchResetCoupons(auth: CodexAuth, usage: RawUsageResponse) {
+  const headers = {
+    ...buildBaseHeaders(auth),
+    "OpenAI-Beta": "codex-1",
+    originator: "Codex Desktop",
+  };
+
+  try {
+    const response = await fetch(RESET_CREDITS_URL, { headers });
+    if (!response.ok) {
+      throw new Error(`HTTP_ERROR_${response.status}`);
+    }
+
+    const payload = (await response.json()) as RawResetCreditsResponse;
+    const credits = Array.isArray(payload.credits) ? payload.credits : [];
+    const normalizedCredits = credits
+      .map((credit, index) => ({
+        index: index + 1,
+        status: credit.status,
+        grantedAt: credit.granted_at ?? null,
+        grantedAtLocal: credit.granted_at
+          ? new Date(credit.granted_at).toLocaleString()
+          : null,
+        expiresAt: credit.expires_at ?? null,
+        expiresAtLocal: credit.expires_at
+          ? new Date(credit.expires_at).toLocaleString()
+          : null,
+        timeUntilExpiry: formatDurationUntil(credit.expires_at),
+      }))
+      .sort((a, b) => {
+        const left = a.expiresAt ? new Date(a.expiresAt).getTime() : Number.MAX_SAFE_INTEGER;
+        const right = b.expiresAt ? new Date(b.expiresAt).getTime() : Number.MAX_SAFE_INTEGER;
+        return left - right;
+      });
+
+    const availableCredits = normalizedCredits.filter(
+      (credit) => credit.status === "available"
+    );
+
+    return {
+      source: "live_api" as const,
+      sourceDescription: "Live Codex reset-credit endpoint",
+      availableCount:
+        payload.available_count ?? usage.rate_limit_reset_credits?.available_count ?? null,
+      totalEarnedCount: payload.total_earned_count ?? null,
+      credits: normalizedCredits,
+      nextExpiringCredit: availableCredits[0] ?? normalizedCredits[0] ?? null,
+    };
+  } catch (error) {
+    const message = error instanceof Error ? error.message : "UNKNOWN_ERROR";
+    return {
+      source: "unavailable" as const,
+      sourceDescription: "Reset-credit endpoint unavailable",
+      availableCount: usage.rate_limit_reset_credits?.available_count ?? null,
+      fallbackReason: message,
+      error: message,
+    };
+  }
+}
+
+export function parseCodexUsageResponse(data: unknown): CodexUsageResponse {
+  if (!data || typeof data !== "object") {
+    throw new Error("INVALID_CODEX_RESPONSE");
+  }
+
+  const value = data as Record<string, unknown>;
+  const primary = value.primary as Record<string, unknown> | null | undefined;
+  const secondary = value.secondary as Record<string, unknown> | null | undefined;
+  const credits = value.credits as Record<string, unknown> | undefined;
+
+  const validWindow = (window: Record<string, unknown> | null | undefined) =>
+    window === null ||
+    window === undefined ||
+    (isNumber(window.usedPercent) &&
+      isNumber(window.resetsAt) &&
+      isNumber(window.windowMinutes) &&
+      isNumber(window.windowSeconds));
+
+  if (
+    !validWindow(primary) ||
+    !validWindow(secondary) ||
+    !credits ||
+    typeof credits.hasCredits !== "boolean" ||
+    typeof credits.unlimited !== "boolean" ||
+    !isNumber(credits.balance)
+  ) {
+    throw new Error("INVALID_CODEX_RESPONSE");
+  }
+
+  return value as unknown as CodexUsageResponse;
+}
+
+export async function fetchCodexUsage(auth: CodexAuth): Promise<CodexUsageResponse> {
+  const headers = buildBaseHeaders(auth);
   const response = await fetch(USAGE_URL, { headers });
 
   if (response.status === 401 || response.status === 403) {
@@ -80,6 +197,19 @@ export async function fetchCodexUsage(auth: CodexAuth): Promise<CodexUsageRespon
     throw new Error(`HTTP_ERROR_${response.status}`);
   }
 
-  const data: unknown = await response.json();
-  return parseCodexUsageResponse(data);
+  const payload = (await response.json()) as RawUsageResponse;
+  const resetCoupons = await fetchResetCoupons(auth, payload);
+
+  return {
+    planType: payload.plan_type ?? null,
+    rateLimitReachedType: payload.rate_limit_reached_type ?? null,
+    primary: normalizeWindow(payload.rate_limit?.primary_window),
+    secondary: normalizeWindow(payload.rate_limit?.secondary_window),
+    credits: {
+      hasCredits: Boolean(payload.credits?.has_credits),
+      unlimited: Boolean(payload.credits?.unlimited),
+      balance: Number(payload.credits?.balance ?? 0),
+    },
+    resetCoupons,
+  };
 }

lib/fileReader.ts

@@ -1,6 +1,41 @@
 import * as DocumentPicker from "expo-document-picker";
+import * as LegacyFileSystem from "expo-file-system/legacy";
 import type { CodexAuth } from "@/types/codex";
 
+function sanitizeFileName(name: string): string {
+  return name.replace(/[^a-zA-Z0-9._-]/g, "_");
+}
+
+async function readPickedTextFile(uri: string, fileName?: string): Promise<string> {
+  try {
+    const response = await fetch(uri);
+    if (!response.ok) {
+      throw new Error(`HTTP_ERROR_${response.status}`);
+    }
+    return await response.text();
+  } catch {
+    try {
+      return await LegacyFileSystem.readAsStringAsync(uri);
+    } catch {
+      const cacheDirectory = LegacyFileSystem.cacheDirectory;
+      if (!cacheDirectory) {
+        throw new Error("DOCUMENT_NOT_READABLE");
+      }
+
+      const destination = `${cacheDirectory}${Date.now()}-${sanitizeFileName(
+        fileName ?? "import.json"
+      )}`;
+
+      try {
+        await LegacyFileSystem.copyAsync({ from: uri, to: destination });
+        return await LegacyFileSystem.readAsStringAsync(destination);
+      } catch {
+        throw new Error("DOCUMENT_NOT_READABLE");
+      }
+    }
+  }
+}
+
 export async function pickAndReadCodexAuth(): Promise<CodexAuth> {
   const result = await DocumentPicker.getDocumentAsync({
     type: "application/json",
@@ -9,9 +44,8 @@ export async function pickAndReadCodexAuth(): Promise<CodexAuth> {
 
   if (result.canceled) throw new Error("PICKER_CANCELLED");
 
-  const { uri } = result.assets[0];
-  const response = await fetch(uri);
-  const text = await response.text();
+  const { uri, name } = result.assets[0];
+  const text = await readPickedTextFile(uri, name);
 
   let parsed: Record<string, unknown>;
   try {
@@ -22,7 +56,11 @@ export async function pickAndReadCodexAuth(): Promise<CodexAuth> {
 
   const tokens = parsed["tokens"] as Record<string, unknown> | undefined;
   const accessToken = (tokens?.["access_token"] ?? parsed["accessToken"]) as string | undefined;
-  const accountId = (tokens?.["account_id"] ?? parsed["accountId"]) as string | undefined;
+  const accountId = (
+    tokens?.["account_id"] ??
+    parsed["accountId"] ??
+    parsed["account_id"]
+  ) as string | undefined;
 
   if (!accessToken || typeof accessToken !== "string") {
     throw new Error("MISSING_ACCESS_TOKEN");

lib/notifications.ts

@@ -56,7 +56,7 @@ export async function scheduleDailyDigest(
   }
   if (codexUsage) {
     parts.push(
-      `Codex: ${Math.round(codexUsage.rate_limit.secondary_window.used_percent)}% used`
+      `Codex: ${Math.round(codexUsage.secondary?.usedPercent ?? 0)}% used`
     );
   }
 
@@ -106,7 +106,7 @@ function buildThresholdAlerts(
   }
 
   if (codexUsage) {
-    const remaining = 100 - codexUsage.rate_limit.secondary_window.used_percent;
+    const remaining = 100 - (codexUsage.secondary?.usedPercent ?? 0);
     if (remaining <= thresholdPct) {
       alerts.push({ service: "Codex", window: "weekly", remaining });
     }

package.json

@@ -6,14 +6,14 @@
     "@expo/metro-runtime": "~56.0.15",
     "@expo/vector-icons": "^15.1.1",
     "babel-preset-expo": "~56.0.0",
-    "expo": "~56.0.12",
-    "expo-constants": "~56.0.18",
+    "expo": "~56.0.14",
+    "expo-constants": "~56.0.20",
     "expo-document-picker": "~56.0.4",
     "expo-file-system": "~56.0.8",
     "expo-font": "~56.0.7",
-    "expo-linking": "~56.0.14",
-    "expo-notifications": "~56.0.18",
-    "expo-router": "~56.2.11",
+    "expo-linking": "~56.0.15",
+    "expo-notifications": "~56.0.19",
+    "expo-router": "~56.2.13",
     "expo-secure-store": "~56.0.4",
     "expo-splash-screen": "~56.0.10",
     "expo-status-bar": "~56.0.4",

types/codex.ts

@@ -3,21 +3,55 @@ export interface CodexAuth {
   accountId?: string;
 }
 
-export interface UsageWindow {
-  used_percent: number;
-  reset_at: number;
-  limit_window_seconds: number;
+export interface CodexUsageWindow {
+  usedPercent: number;
+  resetsAt: number;
+  windowMinutes: number;
+  windowSeconds: number;
 }
 
-export interface CodexUsageResponse {
-  plan_type: string;
-  rate_limit: {
-    primary_window: UsageWindow;
-    secondary_window: UsageWindow;
-  };
-  credits: {
-    has_credits: boolean;
+export interface CodexCreditsSummary {
+  hasCredits: boolean;
   unlimited: boolean;
   balance: number;
-  };
+}
+
+export interface CodexResetCredit {
+  index: number;
+  status?: string;
+  grantedAt?: string | null;
+  grantedAtLocal?: string | null;
+  expiresAt?: string | null;
+  expiresAtLocal?: string | null;
+  timeUntilExpiry?: string | null;
+}
+
+export interface CodexResetCoupons {
+  source: "live_api" | "local_state_fallback" | "unavailable";
+  sourceDescription: string;
+  availableCount?: number | null;
+  totalEarnedCount?: number | null;
+  credits?: CodexResetCredit[];
+  nextExpiringCredit?: CodexResetCredit | null;
+  dismissedAtLocal?: string | null;
+  latestPossibleExpiryLocal?: string | null;
+  latestPossibleExpiryNote?: string | null;
+  fallbackReason?: string;
+  error?: string;
+}
+
+export interface CodexDesktopSnapshot {
+  sessionFile?: string;
+  threadId?: string | null;
+  snapshotTimestamp?: string | null;
+  limitId?: string | null;
+  planType?: string | null;
+  rateLimitReachedType?: string | null;
+  primary: CodexUsageWindow | null;
+  secondary: CodexUsageWindow | null;
+}
+
+export interface CodexUsageResponse extends CodexDesktopSnapshot {
+  credits: CodexCreditsSummary;
+  resetCoupons?: CodexResetCoupons | null;
 }