Merge pull request #163 from erdemozyol/feat/codex-status-usage

Add Codex usage to /status

src/components/Settings/CodexUsage.tsx

@@ -0,0 +1,211 @@
+import * as React from 'react'
+import { useEffect, useState } from 'react'
+
+import { useTerminalSize } from '../../hooks/useTerminalSize.js'
+import { Box, Text } from '../../ink.js'
+import { useKeybinding } from '../../keybindings/useKeybinding.js'
+import {
+  buildCodexUsageRows,
+  fetchCodexUsage,
+  formatCodexPlanType,
+  type CodexUsageData,
+  type CodexUsageRow,
+} from '../../services/api/codexUsage.js'
+import { formatResetText } from '../../utils/format.js'
+import { logError } from '../../utils/log.js'
+import { ConfigurableShortcutHint } from '../ConfigurableShortcutHint.js'
+import { Byline } from '../design-system/Byline.js'
+import { ProgressBar } from '../design-system/ProgressBar.js'
+
+type CodexUsageLimitBarProps = {
+  label: string
+  usedPercent: number
+  resetsAt?: string
+  maxWidth: number
+}
+
+function CodexUsageLimitBar({
+  label,
+  usedPercent,
+  resetsAt,
+  maxWidth,
+}: CodexUsageLimitBarProps): React.ReactNode {
+  const normalizedUsedPercent = Math.max(0, Math.min(100, usedPercent))
+  const usedText = `${Math.floor(normalizedUsedPercent)}% used`
+  const resetText = resetsAt
+    ? `Resets ${formatResetText(resetsAt, true, true)}`
+    : undefined
+
+  if (maxWidth >= 62) {
+    return (
+      <Box flexDirection="column">
+        <Text bold>{label}</Text>
+        <Box flexDirection="row" gap={1}>
+          <ProgressBar
+            ratio={normalizedUsedPercent / 100}
+            width={50}
+            fillColor="rate_limit_fill"
+            emptyColor="rate_limit_empty"
+          />
+          <Text>{usedText}</Text>
+        </Box>
+        {resetText ? <Text dimColor>{resetText}</Text> : null}
+      </Box>
+    )
+  }
+
+  return (
+    <Box flexDirection="column">
+      <Text>
+        <Text bold>{label}</Text>
+        {resetText ? (
+          <>
+            <Text> </Text>
+            <Text dimColor>· {resetText}</Text>
+          </>
+        ) : null}
+      </Text>
+      <ProgressBar
+        ratio={normalizedUsedPercent / 100}
+        width={maxWidth}
+        fillColor="rate_limit_fill"
+        emptyColor="rate_limit_empty"
+      />
+      <Text>{usedText}</Text>
+    </Box>
+  )
+}
+
+function CodexUsageTextRow({
+  label,
+  value,
+}: Extract<CodexUsageRow, { kind: 'text' }>): React.ReactNode {
+  if (!value) {
+    return <Text bold>{label}</Text>
+  }
+
+  return (
+    <Text>
+      <Text bold>{label}</Text>
+      <Text dimColor> · {value}</Text>
+    </Text>
+  )
+}
+
+export function CodexUsage(): React.ReactNode {
+  const [usage, setUsage] = useState<CodexUsageData | null>(null)
+  const [error, setError] = useState<string | null>(null)
+  const [isLoading, setIsLoading] = useState(true)
+  const { columns } = useTerminalSize()
+  const availableWidth = columns - 2
+  const maxWidth = Math.min(availableWidth, 80)
+
+  const loadUsage = React.useCallback(async () => {
+    setIsLoading(true)
+    setError(null)
+
+    try {
+      setUsage(await fetchCodexUsage())
+    } catch (err) {
+      logError(err as Error)
+      setError(err instanceof Error ? err.message : 'Failed to load Codex usage')
+    } finally {
+      setIsLoading(false)
+    }
+  }, [])
+
+  useEffect(() => {
+    void loadUsage()
+  }, [loadUsage])
+
+  useKeybinding(
+    'settings:retry',
+    () => {
+      void loadUsage()
+    },
+    {
+      context: 'Settings',
+      isActive: !!error && !isLoading,
+    },
+  )
+
+  if (error) {
+    return (
+      <Box flexDirection="column" gap={1}>
+        <Text color="error">Error: {error}</Text>
+        <Text dimColor>
+          <Byline>
+            <ConfigurableShortcutHint
+              action="settings:retry"
+              context="Settings"
+              fallback="r"
+              description="retry"
+            />
+            <ConfigurableShortcutHint
+              action="confirm:no"
+              context="Settings"
+              fallback="Esc"
+              description="cancel"
+            />
+          </Byline>
+        </Text>
+      </Box>
+    )
+  }
+
+  if (!usage) {
+    return (
+      <Box flexDirection="column" gap={1}>
+        <Text dimColor>Loading Codex usage data…</Text>
+        <Text dimColor>
+          <ConfigurableShortcutHint
+            action="confirm:no"
+            context="Settings"
+            fallback="Esc"
+            description="cancel"
+          />
+        </Text>
+      </Box>
+    )
+  }
+
+  const rows = buildCodexUsageRows(usage.snapshots)
+  const planType = formatCodexPlanType(usage.planType)
+
+  return (
+    <Box flexDirection="column" gap={1} width="100%">
+      {planType ? <Text dimColor>Plan: {planType}</Text> : null}
+
+      {rows.length === 0 ? (
+        <Text dimColor>Codex usage data is not available for this account.</Text>
+      ) : null}
+
+      {rows.map((row, index) =>
+        row.kind === 'window' ? (
+          <CodexUsageLimitBar
+            key={`${row.label}-${index}`}
+            label={row.label}
+            usedPercent={row.usedPercent}
+            resetsAt={row.resetsAt}
+            maxWidth={maxWidth}
+          />
+        ) : (
+          <CodexUsageTextRow
+            key={`${row.label}-${index}`}
+            label={row.label}
+            value={row.value}
+          />
+        ),
+      )}
+
+      <Text dimColor>
+        <ConfigurableShortcutHint
+          action="confirm:no"
+          context="Settings"
+          fallback="Esc"
+          description="cancel"
+        />
+      </Text>
+    </Box>
+  )
+}

src/components/Settings/Usage.tsx

@@ -10,11 +10,13 @@ import { useKeybinding } from '../../keybindings/useKeybinding.js';
 import { type ExtraUsage, fetchUtilization, type RateLimit, type Utilization } from '../../services/api/usage.js';
 import { formatResetText } from '../../utils/format.js';
 import { logError } from '../../utils/log.js';
+import { getAPIProvider } from '../../utils/model/providers.js';
 import { jsonStringify } from '../../utils/slowOperations.js';
 import { ConfigurableShortcutHint } from '../ConfigurableShortcutHint.js';
 import { Byline } from '../design-system/Byline.js';
 import { ProgressBar } from '../design-system/ProgressBar.js';
 import { isEligibleForOverageCreditGrant, OverageCreditUpsell } from '../LogoV2/OverageCreditUpsell.js';
+import { CodexUsage } from './CodexUsage.js';
 type LimitBarProps = {
   title: string;
   limit: RateLimit;
@@ -171,7 +173,7 @@ function LimitBar(t0) {
     return t8;
   }
 }
-export function Usage(): React.ReactNode {
+function AnthropicUsage(): React.ReactNode {
   const [utilization, setUtilization] = useState<Utilization | null>(null);
   const [error, setError] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(true);
@@ -263,6 +265,12 @@ export function Usage(): React.ReactNode {
       </Text>
     </Box>;
 }
+export function Usage(): React.ReactNode {
+  if (getAPIProvider() === 'codex') {
+    return <CodexUsage />;
+  }
+  return <AnthropicUsage />;
+}
 type ExtraUsageSectionProps = {
   extraUsage: ExtraUsage;
   maxWidth: number;

src/components/design-system/Tabs.tsx

@@ -199,7 +199,7 @@ export function Tabs(t0) {
   const t12 = 0;
   const t13 = true;
   const t14 = modalScrollRef ? 0 : undefined;
-  const t15 = !hidden && <Box flexDirection="row" gap={1} flexShrink={modalScrollRef ? 0 : undefined}>{title !== undefined && <Text bold={true} color={color}>{title}</Text>}{tabs.map((t16, i) => {
+  const t15 = !hidden && <Box key={`${selectedTabIndex}-${headerFocused ? "focused" : "blurred"}`} flexDirection="row" gap={1} flexShrink={modalScrollRef ? 0 : undefined}>{title !== undefined && <Text bold={true} color={color}>{title}</Text>}{tabs.map((t16, i) => {
       const [id, title_0] = t16;
       const isCurrent = selectedTabIndex === i;
       const hasColorCursor = color && isCurrent && headerFocused;

src/services/api/codexUsage.test.ts

@@ -0,0 +1,204 @@
+import { describe, expect, test } from 'bun:test'
+
+import {
+  buildCodexUsageRows,
+  formatCodexPlanType,
+  getCodexUsageUrl,
+  normalizeCodexUsagePayload,
+} from './codexUsage.js'
+
+describe('normalizeCodexUsagePayload', () => {
+  test('normalizes live Codex usage payloads from /backend-api/wham/usage', () => {
+    const usage = normalizeCodexUsagePayload({
+      plan_type: 'plus',
+      rate_limit: {
+        primary_window: {
+          used_percent: 38,
+          limit_window_seconds: 18_000,
+          reset_at: 1_775_154_358,
+        },
+        secondary_window: {
+          used_percent: 32,
+          limit_window_seconds: 604_800,
+          reset_at: 1_775_685_041,
+        },
+      },
+      code_review_rate_limit: {
+        primary_window: {
+          used_percent: 0,
+          limit_window_seconds: 604_800,
+          reset_at: 1_775_744_471,
+        },
+        secondary_window: null,
+      },
+      credits: {
+        has_credits: false,
+        unlimited: false,
+        balance: '0',
+      },
+    })
+
+    expect(usage.planType).toBe('plus')
+    expect(usage.snapshots).toHaveLength(2)
+    expect(usage.snapshots[0]).toMatchObject({
+      limitName: 'codex',
+      primary: {
+        usedPercent: 38,
+        windowMinutes: 300,
+      },
+      secondary: {
+        usedPercent: 32,
+        windowMinutes: 10_080,
+      },
+    })
+    expect(usage.snapshots[1]).toMatchObject({
+      limitName: 'code review',
+      primary: {
+        usedPercent: 0,
+        windowMinutes: 10_080,
+      },
+    })
+  })
+
+  test('supports direct protocol-style snapshot collections', () => {
+    const usage = normalizeCodexUsagePayload({
+      rateLimitsByLimitId: {
+        codex: {
+          limit_name: 'codex',
+          primary: {
+            used_percent: 12,
+            window_minutes: 300,
+            resets_at: 1_700_000_000,
+          },
+          credits: {
+            has_credits: true,
+            unlimited: false,
+            balance: '25',
+          },
+        },
+      },
+    })
+
+    expect(usage.snapshots).toEqual([
+      {
+        limitName: 'codex',
+        primary: {
+          usedPercent: 12,
+          windowMinutes: 300,
+          resetsAt: new Date(1_700_000_000 * 1000).toISOString(),
+        },
+        secondary: undefined,
+        credits: {
+          hasCredits: true,
+          unlimited: false,
+          balance: '25',
+        },
+      },
+    ])
+  })
+})
+
+describe('buildCodexUsageRows', () => {
+  test('builds Codex-like labels for primary and secondary windows', () => {
+    const rows = buildCodexUsageRows([
+      {
+        limitName: 'codex',
+        primary: {
+          usedPercent: 38,
+          windowMinutes: 300,
+          resetsAt: '2026-04-02T10:00:00.000Z',
+        },
+        secondary: {
+          usedPercent: 32,
+          windowMinutes: 10_080,
+          resetsAt: '2026-04-09T10:00:00.000Z',
+        },
+      },
+      {
+        limitName: 'code review',
+        primary: {
+          usedPercent: 0,
+          windowMinutes: 10_080,
+          resetsAt: '2026-04-09T10:00:00.000Z',
+        },
+      },
+    ])
+
+    expect(rows).toEqual([
+      {
+        kind: 'window',
+        label: '5h limit',
+        usedPercent: 38,
+        resetsAt: '2026-04-02T10:00:00.000Z',
+      },
+      {
+        kind: 'window',
+        label: 'Weekly limit',
+        usedPercent: 32,
+        resetsAt: '2026-04-09T10:00:00.000Z',
+      },
+      {
+        kind: 'window',
+        label: 'Code review Weekly limit',
+        usedPercent: 0,
+        resetsAt: '2026-04-09T10:00:00.000Z',
+      },
+    ])
+  })
+
+  test('renders credits rows only when credits are available', () => {
+    const rows = buildCodexUsageRows([
+      {
+        limitName: 'codex',
+        credits: {
+          hasCredits: true,
+          unlimited: false,
+          balance: '25.2',
+        },
+      },
+      {
+        limitName: 'code review',
+        credits: {
+          hasCredits: true,
+          unlimited: true,
+        },
+      },
+      {
+        limitName: 'other',
+        credits: {
+          hasCredits: true,
+          unlimited: false,
+          balance: '0',
+        },
+      },
+    ])
+
+    expect(rows).toEqual([
+      {
+        kind: 'text',
+        label: 'Credits',
+        value: '25 credits',
+      },
+      {
+        kind: 'text',
+        label: 'Code review limit',
+        value: '',
+      },
+      {
+        kind: 'text',
+        label: 'Credits',
+        value: 'Unlimited',
+      },
+    ])
+  })
+})
+
+describe('Codex usage helpers', () => {
+  test('formats plan labels and usage endpoint url', () => {
+    expect(formatCodexPlanType('team_max')).toBe('Team Max')
+    expect(getCodexUsageUrl()).toBe('https://chatgpt.com/backend-api/wham/usage')
+    expect(getCodexUsageUrl('https://chatgpt.com/backend-api/codex')).toBe(
+      'https://chatgpt.com/backend-api/wham/usage',
+    )
+  })
+})

src/services/api/codexUsage.ts

@@ -0,0 +1,434 @@
+import {
+  DEFAULT_CODEX_BASE_URL,
+  isCodexBaseUrl,
+  resolveCodexApiCredentials,
+  resolveProviderRequest,
+} from './providerConfig.js'
+
+export type CodexUsageWindow = {
+  usedPercent: number
+  windowMinutes?: number
+  resetsAt?: string
+}
+
+export type CodexUsageCredits = {
+  hasCredits: boolean
+  unlimited: boolean
+  balance?: string
+}
+
+export type CodexUsageSnapshot = {
+  limitName: string
+  primary?: CodexUsageWindow
+  secondary?: CodexUsageWindow
+  credits?: CodexUsageCredits
+}
+
+export type CodexUsageData = {
+  planType?: string
+  snapshots: CodexUsageSnapshot[]
+}
+
+export type CodexUsageRow =
+  | {
+      kind: 'window'
+      label: string
+      usedPercent: number
+      resetsAt?: string
+    }
+  | {
+      kind: 'text'
+      label: string
+      value: string
+    }
+
+type RecordLike = Record<string, unknown>
+
+function isRecord(value: unknown): value is RecordLike {
+  return typeof value === 'object' && value !== null
+}
+
+function asString(value: unknown): string | undefined {
+  return typeof value === 'string' && value.trim() ? value.trim() : undefined
+}
+
+function asNumber(value: unknown): number | undefined {
+  return typeof value === 'number' && Number.isFinite(value) ? value : undefined
+}
+
+function asBoolean(value: unknown): boolean | undefined {
+  return typeof value === 'boolean' ? value : undefined
+}
+
+function toIsoFromUnixSeconds(value: unknown): string | undefined {
+  const seconds = asNumber(value)
+  if (seconds === undefined) return undefined
+  return new Date(seconds * 1000).toISOString()
+}
+
+function normalizeWindow(value: unknown): CodexUsageWindow | undefined {
+  if (!isRecord(value)) return undefined
+
+  const usedPercent =
+    asNumber(value.used_percent) ?? asNumber(value.usedPercent)
+  if (usedPercent === undefined) return undefined
+
+  const windowMinutes =
+    asNumber(value.window_minutes) ??
+    asNumber(value.windowDurationMins) ??
+    (() => {
+      const seconds = asNumber(value.limit_window_seconds)
+      return seconds === undefined ? undefined : Math.round(seconds / 60)
+    })()
+
+  const resetsAt =
+    toIsoFromUnixSeconds(value.resets_at) ??
+    toIsoFromUnixSeconds(value.resetsAt) ??
+    toIsoFromUnixSeconds(value.reset_at)
+
+  return {
+    usedPercent,
+    windowMinutes,
+    resetsAt,
+  }
+}
+
+function normalizeCredits(value: unknown): CodexUsageCredits | undefined {
+  if (!isRecord(value)) return undefined
+
+  const hasCredits =
+    asBoolean(value.has_credits) ?? asBoolean(value.hasCredits) ?? false
+  const unlimited = asBoolean(value.unlimited) ?? false
+  const balance = asString(value.balance)
+
+  if (!hasCredits && !unlimited && !balance) {
+    return undefined
+  }
+
+  return {
+    hasCredits,
+    unlimited,
+    balance,
+  }
+}
+
+function normalizeSnapshot(
+  value: unknown,
+  fallbackLimitName: string,
+): CodexUsageSnapshot | undefined {
+  if (!isRecord(value)) return undefined
+
+  const limitName =
+    asString(value.limit_name) ??
+    asString(value.limitName) ??
+    asString(value.limit_id) ??
+    asString(value.limitId) ??
+    fallbackLimitName
+
+  const primary =
+    normalizeWindow(value.primary) ?? normalizeWindow(value.primary_window)
+  const secondary =
+    normalizeWindow(value.secondary) ?? normalizeWindow(value.secondary_window)
+  const credits = normalizeCredits(value.credits)
+
+  if (!primary && !secondary && !credits) {
+    return undefined
+  }
+
+  return {
+    limitName,
+    primary,
+    secondary,
+    credits,
+  }
+}
+
+function normalizeSnapshotsFromCollection(
+  value: unknown,
+  defaultLimitName = 'codex',
+): CodexUsageSnapshot[] {
+  if (Array.isArray(value)) {
+    return value
+      .map((item, index) =>
+        normalizeSnapshot(
+          item,
+          index === 0 ? defaultLimitName : `${defaultLimitName}-${index + 1}`,
+        ),
+      )
+      .filter((item): item is CodexUsageSnapshot => item !== undefined)
+  }
+
+  if (!isRecord(value)) return []
+
+  return Object.entries(value)
+    .map(([key, entry]) => normalizeSnapshot(entry, key))
+    .filter((item): item is CodexUsageSnapshot => item !== undefined)
+}
+
+function normalizeLiveUsagePayload(payload: RecordLike): CodexUsageData {
+  const planType = asString(payload.plan_type) ?? asString(payload.planType)
+  const snapshots: CodexUsageSnapshot[] = []
+  const codexCredits = normalizeCredits(payload.credits)
+
+  const codexSnapshot = normalizeSnapshot(payload.rate_limit, 'codex')
+  if (codexSnapshot) {
+    codexSnapshot.credits ??= codexCredits
+    snapshots.push(codexSnapshot)
+  } else if (codexCredits) {
+    snapshots.push({
+      limitName: 'codex',
+      credits: codexCredits,
+    })
+  }
+
+  const codeReviewSnapshot = normalizeSnapshot(
+    payload.code_review_rate_limit,
+    'code review',
+  )
+  if (codeReviewSnapshot) {
+    snapshots.push(codeReviewSnapshot)
+  }
+
+  snapshots.push(
+    ...normalizeSnapshotsFromCollection(
+      payload.additional_rate_limits ?? payload.additionalRateLimits,
+      'additional',
+    ),
+  )
+
+  return {
+    planType,
+    snapshots,
+  }
+}
+
+export function normalizeCodexUsagePayload(payload: unknown): CodexUsageData {
+  if (Array.isArray(payload)) {
+    return {
+      snapshots: normalizeSnapshotsFromCollection(payload),
+    }
+  }
+
+  if (!isRecord(payload)) {
+    return { snapshots: [] }
+  }
+
+  if (
+    'rate_limit' in payload ||
+    'code_review_rate_limit' in payload ||
+    'additional_rate_limits' in payload ||
+    'credits' in payload
+  ) {
+    return normalizeLiveUsagePayload(payload)
+  }
+
+  const collection =
+    payload.rate_limits ??
+    payload.rateLimits ??
+    payload.rate_limits_by_limit_id ??
+    payload.rateLimitsByLimitId
+
+  if (collection !== undefined) {
+    return {
+      planType: asString(payload.plan_type) ?? asString(payload.planType),
+      snapshots: normalizeSnapshotsFromCollection(collection),
+    }
+  }
+
+  const snapshot = normalizeSnapshot(payload, 'codex')
+  return {
+    planType: asString(payload.plan_type) ?? asString(payload.planType),
+    snapshots: snapshot ? [snapshot] : [],
+  }
+}
+
+function capitalizeFirst(value: string): string {
+  if (!value) return value
+  return value[0]!.toUpperCase() + value.slice(1)
+}
+
+function formatWindowDuration(
+  windowMinutes: number | undefined,
+  fallback: string,
+): string {
+  if (windowMinutes === undefined || windowMinutes <= 0) {
+    return fallback
+  }
+
+  if (windowMinutes === 60 * 24 * 7) {
+    return 'weekly'
+  }
+
+  if (windowMinutes % (60 * 24) === 0) {
+    return `${windowMinutes / (60 * 24)}d`
+  }
+
+  if (windowMinutes % 60 === 0) {
+    return `${windowMinutes / 60}h`
+  }
+
+  return `${windowMinutes}m`
+}
+
+function formatCreditBalance(rawBalance: string | undefined): string | undefined {
+  const balance = rawBalance?.trim()
+  if (!balance) return undefined
+
+  const intValue = Number.parseInt(balance, 10)
+  if (Number.isFinite(intValue) && `${intValue}` === balance && intValue > 0) {
+    return `${intValue}`
+  }
+
+  const floatValue = Number.parseFloat(balance)
+  if (Number.isFinite(floatValue) && floatValue > 0) {
+    return `${Math.round(floatValue)}`
+  }
+
+  return undefined
+}
+
+function buildCreditsRow(
+  credits: CodexUsageCredits | undefined,
+): CodexUsageRow | undefined {
+  if (!credits?.hasCredits) return undefined
+  if (credits.unlimited) {
+    return {
+      kind: 'text',
+      label: 'Credits',
+      value: 'Unlimited',
+    }
+  }
+
+  const displayBalance = formatCreditBalance(credits.balance)
+  if (!displayBalance) return undefined
+
+  return {
+    kind: 'text',
+    label: 'Credits',
+    value: `${displayBalance} credits`,
+  }
+}
+
+export function buildCodexUsageRows(
+  snapshots: CodexUsageSnapshot[],
+): CodexUsageRow[] {
+  const rows: CodexUsageRow[] = []
+
+  for (const snapshot of snapshots) {
+    const limitBucketLabel = snapshot.limitName.trim() || 'codex'
+    const creditsRow = buildCreditsRow(snapshot.credits)
+    const hasRenderableContent =
+      snapshot.primary !== undefined ||
+      snapshot.secondary !== undefined ||
+      creditsRow !== undefined
+    if (!hasRenderableContent) {
+      continue
+    }
+
+    const showLimitPrefix = limitBucketLabel.toLowerCase() !== 'codex'
+    const windowCount =
+      Number(snapshot.primary !== undefined) +
+      Number(snapshot.secondary !== undefined)
+    const combineNonCodexSingleLimit = showLimitPrefix && windowCount === 1
+
+    if (showLimitPrefix && !combineNonCodexSingleLimit) {
+      rows.push({
+        kind: 'text',
+        label: `${capitalizeFirst(limitBucketLabel)} limit`,
+        value: '',
+      })
+    }
+
+    if (snapshot.primary) {
+      const durationLabel = capitalizeFirst(
+        formatWindowDuration(snapshot.primary.windowMinutes, '5h'),
+      )
+      rows.push({
+        kind: 'window',
+        label: combineNonCodexSingleLimit
+          ? `${capitalizeFirst(limitBucketLabel)} ${durationLabel} limit`
+          : `${durationLabel} limit`,
+        usedPercent: snapshot.primary.usedPercent,
+        resetsAt: snapshot.primary.resetsAt,
+      })
+    }
+
+    if (snapshot.secondary) {
+      const durationLabel = capitalizeFirst(
+        formatWindowDuration(snapshot.secondary.windowMinutes, 'weekly'),
+      )
+      rows.push({
+        kind: 'window',
+        label: combineNonCodexSingleLimit
+          ? `${capitalizeFirst(limitBucketLabel)} ${durationLabel} limit`
+          : `${durationLabel} limit`,
+        usedPercent: snapshot.secondary.usedPercent,
+        resetsAt: snapshot.secondary.resetsAt,
+      })
+    }
+
+    if (creditsRow) {
+      rows.push(creditsRow)
+    }
+  }
+
+  return rows
+}
+
+export function formatCodexPlanType(
+  planType: string | undefined,
+): string | undefined {
+  if (!planType) return undefined
+  return planType
+    .split(/[_\s-]+/)
+    .filter(Boolean)
+    .map(part => capitalizeFirst(part.toLowerCase()))
+    .join(' ')
+}
+
+export function getCodexUsageUrl(baseUrl = DEFAULT_CODEX_BASE_URL): string {
+  return new URL('/backend-api/wham/usage', baseUrl).toString()
+}
+
+export async function fetchCodexUsage(): Promise<CodexUsageData> {
+  const request = resolveProviderRequest({
+    model: process.env.OPENAI_MODEL,
+    baseUrl: process.env.OPENAI_BASE_URL,
+  })
+  if (!isCodexBaseUrl(request.baseUrl)) {
+    throw new Error(
+      'Codex usage is only available with the official ChatGPT Codex backend.',
+    )
+  }
+
+  const credentials = resolveCodexApiCredentials()
+  if (!credentials.apiKey) {
+    const authHint = credentials.authPath
+      ? ` or place a Codex auth.json at ${credentials.authPath}`
+      : ''
+    throw new Error(`Codex auth is required. Set CODEX_API_KEY${authHint}.`)
+  }
+  if (!credentials.accountId) {
+    throw new Error(
+      'Codex auth is missing chatgpt_account_id. Re-login with the Codex CLI or set CHATGPT_ACCOUNT_ID/CODEX_ACCOUNT_ID.',
+    )
+  }
+
+  const response = await fetch(getCodexUsageUrl(request.baseUrl), {
+    method: 'GET',
+    headers: {
+      Accept: 'application/json',
+      Authorization: `Bearer ${credentials.apiKey}`,
+      'chatgpt-account-id': credentials.accountId,
+      originator: 'openclaude',
+    },
+    signal: AbortSignal.timeout(5000),
+  })
+
+  if (!response.ok) {
+    const errorBody = await response.text().catch(() => 'unknown error')
+    throw new Error(`Codex usage error ${response.status}: ${errorBody}`)
+  }
+
+  return normalizeCodexUsagePayload(await response.json())
+}