diff --git a/src/cliproxy/quota-fetcher-codex.ts b/src/cliproxy/quota-fetcher-codex.ts
index 811be609..c0c4940b 100644
--- a/src/cliproxy/quota-fetcher-codex.ts
+++ b/src/cliproxy/quota-fetcher-codex.ts
@@ -39,8 +39,10 @@ interface CodexUsageResponse {
   planType?: string;
   rate_limit?: CodexRateLimitWindow;
   rateLimit?: CodexRateLimitWindow;
-  code_review_rate_limit?: CodexRateLimitWindow;
-  codeReviewRateLimit?: CodexRateLimitWindow;
+  code_review_rate_limit?: CodexRateLimitWindow | null;
+  codeReviewRateLimit?: CodexRateLimitWindow | null;
+  additional_rate_limits?: CodexAdditionalRateLimit[] | null;
+  additionalRateLimits?: CodexAdditionalRateLimit[] | null;
 }
 
 /** Rate limit window from API */
@@ -51,6 +53,19 @@ interface CodexRateLimitWindow {
   secondaryWindow?: CodexWindowData;
 }
 
+/**
+ * Additional rate limit entry from API (introduced for features like GPT-5.3 Codex Spark).
+ * Each entry surfaces its own primary/secondary windows under a feature-specific limit name.
+ */
+interface CodexAdditionalRateLimit {
+  limit_name?: string;
+  limitName?: string;
+  metered_feature?: string;
+  meteredFeature?: string;
+  rate_limit?: CodexRateLimitWindow;
+  rateLimit?: CodexRateLimitWindow;
+}
+
 /** Individual window data */
 interface CodexWindowData {
   used_percent?: number;
@@ -92,7 +107,11 @@ function getCodexWindowKind(label: string): CodexWindowKind {
 
 function getUnknownCodexWindowLabels(windows: CodexQuotaWindow[]): string[] {
   const unknownLabels = windows
-    .filter((window) => getCodexWindowKind(window.label) === 'unknown')
+    .filter((window) => {
+      // Windows with explicit category metadata are always classified.
+      if (window.category) return false;
+      return getCodexWindowKind(window.label) === 'unknown';
+    })
     .map((window) => window.label)
     .filter((label): label is string => typeof label === 'string' && label.trim().length > 0);
   return Array.from(new Set(unknownLabels));
@@ -106,7 +125,8 @@ function shouldLogCodexWindowWarnings(verbose: boolean): boolean {
 
 /**
  * Build explicit 5h + weekly usage summary from raw Codex windows.
- * Falls back to shortest/longest reset windows if API labels change.
+ * Prefers explicit `category`/`cadence` metadata when present.
+ * Falls back to label sniffing for legacy cached windows.
  */
 export function buildCodexCoreUsageSummary(windows: CodexQuotaWindow[]): CodexCoreUsageSummary {
   if (!windows || windows.length === 0) {
@@ -117,20 +137,36 @@ export function buildCodexCoreUsageSummary(windows: CodexQuotaWindow[]): CodexCo
   let weeklyWindow: CodexQuotaWindow | null = null;
   const nonCodeReviewWindows: CodexQuotaWindow[] = [];
 
-  for (const window of windows) {
-    const kind = getCodexWindowKind(window.label);
-    if (kind === 'usage-5h') {
-      if (!fiveHourWindow) fiveHourWindow = window;
-      nonCodeReviewWindows.push(window);
-      continue;
+  // Determine if any window carries category metadata. If so, prefer category-based
+  // selection so 'additional' windows (e.g. Spark) do not pollute the main usage summary.
+  const hasCategoryMetadata = windows.some((window) => Boolean(window.category));
+
+  if (hasCategoryMetadata) {
+    for (const window of windows) {
+      if (window.category === 'usage') {
+        if (window.cadence === '5h' && !fiveHourWindow) fiveHourWindow = window;
+        else if (window.cadence === 'weekly' && !weeklyWindow) weeklyWindow = window;
+        nonCodeReviewWindows.push(window);
+      }
+      // 'code-review' and 'additional' windows are intentionally excluded from the main
+      // usage summary — they represent feature-specific quotas, not core usage.
     }
-    if (kind === 'usage-weekly') {
-      if (!weeklyWindow) weeklyWindow = window;
-      nonCodeReviewWindows.push(window);
-      continue;
-    }
-    if (kind === 'unknown') {
-      nonCodeReviewWindows.push(window);
+  } else {
+    for (const window of windows) {
+      const kind = getCodexWindowKind(window.label);
+      if (kind === 'usage-5h') {
+        if (!fiveHourWindow) fiveHourWindow = window;
+        nonCodeReviewWindows.push(window);
+        continue;
+      }
+      if (kind === 'usage-weekly') {
+        if (!weeklyWindow) weeklyWindow = window;
+        nonCodeReviewWindows.push(window);
+        continue;
+      }
+      if (kind === 'unknown') {
+        nonCodeReviewWindows.push(window);
+      }
     }
   }
 
@@ -270,9 +306,18 @@ function buildCodexQuotaWindows(payload: CodexUsageResponse): CodexQuotaWindow[]
   // Get rate limit object (handles both cases)
   const rateLimit = payload.rate_limit || payload.rateLimit;
   const codeReviewRateLimit = payload.code_review_rate_limit || payload.codeReviewRateLimit;
+  const additionalRateLimits = payload.additional_rate_limits || payload.additionalRateLimits;
 
   // Helper to extract window data
-  const addWindow = (label: string, windowData: CodexWindowData | undefined): void => {
+  const addWindow = (
+    label: string,
+    windowData: CodexWindowData | undefined,
+    meta: {
+      category: NonNullable<CodexQuotaWindow['category']>;
+      cadence: NonNullable<CodexQuotaWindow['cadence']>;
+      featureLabel?: string;
+    }
+  ): void => {
     if (!windowData) return;
 
     // Clamp usedPercent to [0, 100] range
@@ -287,33 +332,68 @@ function buildCodexQuotaWindows(payload: CodexUsageResponse): CodexQuotaWindow[]
       resetAt = new Date(Date.now() + resetAfterSeconds * 1000).toISOString();
     }
 
-    windows.push({
+    const window: CodexQuotaWindow = {
       label,
       usedPercent,
       remainingPercent: Math.max(0, 100 - usedPercent),
       resetAfterSeconds,
       resetAt,
-    });
+      category: meta.category,
+      cadence: meta.cadence,
+    };
+    if (meta.featureLabel) {
+      window.featureLabel = meta.featureLabel;
+    }
+    windows.push(window);
   };
 
   // Add main rate limit windows
   if (rateLimit) {
-    addWindow('Primary', rateLimit.primary_window || rateLimit.primaryWindow);
-    addWindow('Secondary', rateLimit.secondary_window || rateLimit.secondaryWindow);
+    addWindow('Primary', rateLimit.primary_window || rateLimit.primaryWindow, {
+      category: 'usage',
+      cadence: '5h',
+    });
+    addWindow('Secondary', rateLimit.secondary_window || rateLimit.secondaryWindow, {
+      category: 'usage',
+      cadence: 'weekly',
+    });
   }
 
   // Add code review rate limit windows
   if (codeReviewRateLimit) {
     addWindow(
       'Code Review (Primary)',
-      codeReviewRateLimit.primary_window || codeReviewRateLimit.primaryWindow
+      codeReviewRateLimit.primary_window || codeReviewRateLimit.primaryWindow,
+      { category: 'code-review', cadence: '5h', featureLabel: 'Code Review' }
     );
     addWindow(
       'Code Review (Secondary)',
-      codeReviewRateLimit.secondary_window || codeReviewRateLimit.secondaryWindow
+      codeReviewRateLimit.secondary_window || codeReviewRateLimit.secondaryWindow,
+      { category: 'code-review', cadence: 'weekly', featureLabel: 'Code Review' }
     );
   }
 
+  // Add additional rate limit windows (e.g. GPT-5.3 Codex Spark)
+  if (Array.isArray(additionalRateLimits)) {
+    for (const entry of additionalRateLimits) {
+      if (!entry) continue;
+      const entryRateLimit = entry.rate_limit || entry.rateLimit;
+      if (!entryRateLimit) continue;
+
+      const featureLabel = entry.limit_name || entry.limitName || 'Additional';
+      addWindow(
+        `${featureLabel} (Primary)`,
+        entryRateLimit.primary_window || entryRateLimit.primaryWindow,
+        { category: 'additional', cadence: '5h', featureLabel }
+      );
+      addWindow(
+        `${featureLabel} (Secondary)`,
+        entryRateLimit.secondary_window || entryRateLimit.secondaryWindow,
+        { category: 'additional', cadence: 'weekly', featureLabel }
+      );
+    }
+  }
+
   return windows;
 }
 
diff --git a/src/cliproxy/quota-types.ts b/src/cliproxy/quota-types.ts
index e768ec9b..f8a9ba66 100644
--- a/src/cliproxy/quota-types.ts
+++ b/src/cliproxy/quota-types.ts
@@ -29,10 +29,10 @@ export interface QuotaErrorMetadata {
 }
 
 /**
- * Codex quota window (primary, secondary, code review)
+ * Codex quota window (primary, secondary, code review, additional)
  */
 export interface CodexQuotaWindow {
-  /** Window label: "Primary", "Secondary", "Code Review (Primary)", "Code Review (Secondary)" */
+  /** Window label: "Primary", "Secondary", "Code Review (Primary)", "Code Review (Secondary)", or "<feature> (Primary|Secondary)" */
   label: string;
   /** Percentage used (0-100) */
   usedPercent: number;
@@ -42,6 +42,18 @@ export interface CodexQuotaWindow {
   resetAfterSeconds: number | null;
   /** ISO timestamp when quota resets, null if unknown */
   resetAt: string | null;
+  /**
+   * Window category indicating the bucket this window belongs to.
+   * Optional for back-compat with cached data emitted before this field existed.
+   * - 'usage' -> standard rate_limit usage windows
+   * - 'code-review' -> code_review_rate_limit windows
+   * - 'additional' -> additional_rate_limits[] windows (e.g. GPT-5.3 Codex Spark)
+   */
+  category?: 'usage' | 'code-review' | 'additional';
+  /** Cadence of the window: '5h' = primary, 'weekly' = secondary. Optional for legacy data. */
+  cadence?: '5h' | 'weekly';
+  /** Raw upstream label (e.g. 'GPT-5.3-Codex-Spark', 'Code Review'); absent for plain usage windows. */
+  featureLabel?: string;
 }
 
 /** Core Codex usage window (5h/weekly) extracted from raw windows */
diff --git a/src/commands/cliproxy/quota-subcommand.ts b/src/commands/cliproxy/quota-subcommand.ts
index 5df3faaf..3466e1e7 100644
--- a/src/commands/cliproxy/quota-subcommand.ts
+++ b/src/commands/cliproxy/quota-subcommand.ts
@@ -238,7 +238,10 @@ function getCodexWindowKind(label: string): CodexWindowKind {
   return 'unknown';
 }
 
-type CodexWindowSummary = Pick<CodexQuotaResult['windows'][number], 'label' | 'resetAfterSeconds'>;
+type CodexWindowSummary = Pick<
+  CodexQuotaResult['windows'][number],
+  'label' | 'resetAfterSeconds' | 'category' | 'cadence' | 'featureLabel'
+>;
 
 function inferCodeReviewCadence(
   window: CodexWindowSummary,
@@ -272,12 +275,46 @@ function inferCodeReviewCadence(
   return diffToWeekly <= diffTo5h ? 'weekly' : '5h';
 }
 
+/**
+ * Strip a leading "GPT-X.Y-Codex-" prefix from a feature label and turn the
+ * remainder into a Codex-prefixed display name. Other labels pass through unchanged.
+ */
+function prettifyCodexFeatureLabel(featureLabel: string): string {
+  const trimmed = featureLabel.trim();
+  if (!trimmed) return 'Additional';
+  const stripped = trimmed.replace(/^GPT-[\d.]+-Codex-/i, '');
+  if (stripped !== trimmed && stripped.length > 0) {
+    return `Codex ${stripped}`;
+  }
+  return trimmed;
+}
+
 function getCodexWindowDisplayLabel(
   window: CodexWindowSummary,
   allWindows: CodexWindowSummary[] = []
 ): string {
   const context = allWindows.length > 0 ? allWindows : [window];
 
+  // Prefer explicit category metadata when present (post-2026-04 windows).
+  if (window.category === 'usage') {
+    if (window.cadence === '5h') return '5h usage limit';
+    if (window.cadence === 'weekly') return 'Weekly usage limit';
+  }
+
+  if (window.category === 'additional') {
+    const pretty = prettifyCodexFeatureLabel(window.featureLabel || 'Additional');
+    if (window.cadence === '5h') return `${pretty} (5h)`;
+    if (window.cadence === 'weekly') return `${pretty} (weekly)`;
+    return pretty;
+  }
+
+  if (window.category === 'code-review') {
+    if (window.cadence === '5h') return 'Code review (5h)';
+    if (window.cadence === 'weekly') return 'Code review (weekly)';
+    return 'Code review';
+  }
+
+  // Legacy fallback: classify via label sniffing for cached windows without metadata.
   switch (getCodexWindowKind(window.label)) {
     case 'usage-5h':
       return '5h usage limit';
@@ -304,20 +341,35 @@ function getCodexCoreUsageWindows(windows: CodexQuotaResult['windows']): {
   let weeklyWindow: CodexQuotaResult['windows'][number] | null = null;
   const nonCodeReviewWindows: CodexQuotaResult['windows'] = [];
 
-  for (const window of windows) {
-    const kind = getCodexWindowKind(window.label);
-    if (kind === 'usage-5h') {
-      if (!fiveHourWindow) fiveHourWindow = window;
-      nonCodeReviewWindows.push(window);
-      continue;
+  // Prefer explicit category metadata when present so 'additional' windows
+  // (e.g. GPT-5.3 Codex Spark) do not displace core usage windows in the summary.
+  const hasCategoryMetadata = windows.some((window) => Boolean(window.category));
+
+  if (hasCategoryMetadata) {
+    for (const window of windows) {
+      if (window.category === 'usage') {
+        if (window.cadence === '5h' && !fiveHourWindow) fiveHourWindow = window;
+        else if (window.cadence === 'weekly' && !weeklyWindow) weeklyWindow = window;
+        nonCodeReviewWindows.push(window);
+      }
+      // 'code-review' and 'additional' are excluded from the core usage summary.
     }
-    if (kind === 'usage-weekly') {
-      if (!weeklyWindow) weeklyWindow = window;
-      nonCodeReviewWindows.push(window);
-      continue;
-    }
-    if (kind === 'unknown') {
-      nonCodeReviewWindows.push(window);
+  } else {
+    for (const window of windows) {
+      const kind = getCodexWindowKind(window.label);
+      if (kind === 'usage-5h') {
+        if (!fiveHourWindow) fiveHourWindow = window;
+        nonCodeReviewWindows.push(window);
+        continue;
+      }
+      if (kind === 'usage-weekly') {
+        if (!weeklyWindow) weeklyWindow = window;
+        nonCodeReviewWindows.push(window);
+        continue;
+      }
+      if (kind === 'unknown') {
+        nonCodeReviewWindows.push(window);
+      }
     }
   }
 
diff --git a/tests/unit/cliproxy/quota-fetcher-codex.test.ts b/tests/unit/cliproxy/quota-fetcher-codex.test.ts
index af6bc479..4bf3e689 100644
--- a/tests/unit/cliproxy/quota-fetcher-codex.test.ts
+++ b/tests/unit/cliproxy/quota-fetcher-codex.test.ts
@@ -246,6 +246,122 @@ describe('Codex Quota Fetcher', () => {
       expect(windows[0].usedPercent).toBe(0);
       expect(windows[0].remainingPercent).toBe(100);
     });
+
+    it('should attach category and cadence metadata to standard usage windows', () => {
+      const response = {
+        rate_limit: {
+          primary_window: { used_percent: 5, reset_after_seconds: 18000 },
+          secondary_window: { used_percent: 25, reset_after_seconds: 604800 },
+        },
+      };
+
+      const windows = buildCodexQuotaWindows(response);
+
+      expect(windows).toHaveLength(2);
+      expect(windows[0].category).toBe('usage');
+      expect(windows[0].cadence).toBe('5h');
+      expect(windows[0].featureLabel).toBeUndefined();
+      expect(windows[1].category).toBe('usage');
+      expect(windows[1].cadence).toBe('weekly');
+    });
+
+    it('should mark code review windows with code-review category and Code Review feature label', () => {
+      const response = {
+        code_review_rate_limit: {
+          primary_window: { used_percent: 12, reset_after_seconds: 1800 },
+          secondary_window: { used_percent: 60, reset_after_seconds: 604800 },
+        },
+      };
+
+      const windows = buildCodexQuotaWindows(response);
+
+      expect(windows).toHaveLength(2);
+      expect(windows[0].category).toBe('code-review');
+      expect(windows[0].cadence).toBe('5h');
+      expect(windows[0].featureLabel).toBe('Code Review');
+      expect(windows[1].category).toBe('code-review');
+      expect(windows[1].cadence).toBe('weekly');
+      expect(windows[1].featureLabel).toBe('Code Review');
+    });
+
+    it('should parse additional_rate_limits entries (e.g. GPT-5.3 Codex Spark)', () => {
+      const response = {
+        rate_limit: {
+          primary_window: { used_percent: 0, reset_after_seconds: 18000 },
+          secondary_window: { used_percent: 1, reset_after_seconds: 254493 },
+        },
+        code_review_rate_limit: null,
+        additional_rate_limits: [
+          {
+            limit_name: 'GPT-5.3-Codex-Spark',
+            metered_feature: 'codex_bengalfox',
+            rate_limit: {
+              primary_window: { used_percent: 0, reset_after_seconds: 18000 },
+              secondary_window: { used_percent: 1, reset_after_seconds: 254493 },
+            },
+          },
+        ],
+      };
+
+      const windows = buildCodexQuotaWindows(response);
+
+      // 2 standard usage windows + 2 additional windows.
+      expect(windows).toHaveLength(4);
+
+      const additionalWindows = windows.filter((w) => w.category === 'additional');
+      expect(additionalWindows).toHaveLength(2);
+
+      const sparkPrimary = additionalWindows.find((w) => w.cadence === '5h');
+      const sparkSecondary = additionalWindows.find((w) => w.cadence === 'weekly');
+
+      expect(sparkPrimary).toBeDefined();
+      expect(sparkPrimary?.featureLabel).toBe('GPT-5.3-Codex-Spark');
+      expect(sparkPrimary?.label).toBe('GPT-5.3-Codex-Spark (Primary)');
+      expect(sparkPrimary?.usedPercent).toBe(0);
+      expect(sparkPrimary?.remainingPercent).toBe(100);
+
+      expect(sparkSecondary).toBeDefined();
+      expect(sparkSecondary?.featureLabel).toBe('GPT-5.3-Codex-Spark');
+      expect(sparkSecondary?.label).toBe('GPT-5.3-Codex-Spark (Secondary)');
+      expect(sparkSecondary?.usedPercent).toBe(1);
+      expect(sparkSecondary?.remainingPercent).toBe(99);
+    });
+
+    it('should handle additional_rate_limits set to null without breaking', () => {
+      const response = {
+        rate_limit: {
+          primary_window: { used_percent: 10, reset_after_seconds: 3600 },
+        },
+        additional_rate_limits: null,
+      };
+
+      const windows = buildCodexQuotaWindows(response);
+
+      expect(windows).toHaveLength(1);
+      expect(windows[0].category).toBe('usage');
+      expect(windows.find((w) => w.category === 'additional')).toBeUndefined();
+    });
+
+    it('should accept camelCase additionalRateLimits and rateLimit fields', () => {
+      const response = {
+        additionalRateLimits: [
+          {
+            limitName: 'Custom-Feature',
+            rateLimit: {
+              primaryWindow: { usedPercent: 50, resetAfterSeconds: 3600 },
+            },
+          },
+        ],
+      };
+
+      const windows = buildCodexQuotaWindows(response);
+
+      expect(windows).toHaveLength(1);
+      expect(windows[0].category).toBe('additional');
+      expect(windows[0].cadence).toBe('5h');
+      expect(windows[0].featureLabel).toBe('Custom-Feature');
+      expect(windows[0].usedPercent).toBe(50);
+    });
   });
 
   describe('buildCodexCoreUsageSummary', () => {
@@ -311,6 +427,36 @@ describe('Codex Quota Fetcher', () => {
       expect(summary.fiveHour).toBeNull();
       expect(summary.weekly).toBeNull();
     });
+
+    it('excludes additional and code-review windows from the core usage summary', () => {
+      const windows = buildCodexQuotaWindows({
+        rate_limit: {
+          primary_window: { used_percent: 35, reset_after_seconds: 18000 },
+          secondary_window: { used_percent: 60, reset_after_seconds: 604800 },
+        },
+        code_review_rate_limit: {
+          primary_window: { used_percent: 70, reset_after_seconds: 1800 },
+        },
+        additional_rate_limits: [
+          {
+            limit_name: 'GPT-5.3-Codex-Spark',
+            rate_limit: {
+              primary_window: { used_percent: 90, reset_after_seconds: 100 },
+              secondary_window: { used_percent: 95, reset_after_seconds: 7200 },
+            },
+          },
+        ],
+      });
+
+      const summary = buildCodexCoreUsageSummary(windows);
+
+      // Should pick the 'usage' windows, NOT the Spark windows even though they
+      // have shorter reset cadences.
+      expect(summary.fiveHour?.label).toBe('Primary');
+      expect(summary.fiveHour?.resetAfterSeconds).toBe(18000);
+      expect(summary.weekly?.label).toBe('Secondary');
+      expect(summary.weekly?.resetAfterSeconds).toBe(604800);
+    });
   });
 
   describe('getUnknownCodexWindowLabels', () => {