diff --git a/packages/shared/src/usageLimits.test.ts b/packages/shared/src/usageLimits.test.ts
index 9d2bf395a9d72..6d2604e9c6dd1 100644
--- a/packages/shared/src/usageLimits.test.ts
+++ b/packages/shared/src/usageLimits.test.ts
@@ -180,6 +180,16 @@ describe("new thread model fallback", () => {
       ["opencode", "console-custom"],
     ],
     ["opencode", ["budget_all"], "opencode/model", false, undefined, []],
+    ["claudeAgent", ["seven_day_fable"], "claude-opus-5-5", false, undefined, undefined],
+    ["claudeAgent", ["seven_day_fable"], "claude-fable-5-1", true, undefined, undefined],
+    [
+      "claudeAgent",
+      ["seven_day", "seven_day_fable"],
+      "claude-opus-5-5",
+      true,
+      undefined,
+      undefined,
+    ],
   ] as const)(
     "matches %s pools %s to %s",
     (driver, ids, model, usesFallback, modelIds, providerIds) => {
diff --git a/packages/shared/src/usageLimits.ts b/packages/shared/src/usageLimits.ts
index b7902f11d6733..ad28aa1e3c7f2 100644
--- a/packages/shared/src/usageLimits.ts
+++ b/packages/shared/src/usageLimits.ts
@@ -70,6 +70,14 @@ export function exhaustedUsageWindow(
       return exhausted.find(
         (window) => !window.id.startsWith("go_") || model.startsWith("opencode-go/"),
       );
+    case "claudeAgent": {
+      // Model-scoped weekly buckets (`seven_day_<model>`, e.g. Fable) only cap that model.
+      const slug = model.toLowerCase().replace(/[^a-z0-9]+/g, "_");
+      return exhausted.find((window) => {
+        const scope = window.id.match(/^seven_day_(.+)$/)?.[1];
+        return scope === undefined || slug.includes(scope);
+      });
+    }
     default:
       return exhausted[0];
   }