fix: parse queue caps strictly

src/auto-reply/reply/directive-handling.queue-validation.test.ts

@@ -44,4 +44,14 @@ describe("maybeHandleQueueDirective", () => {
       "Options: modes steer, followup, collect, interrupt; debounce:<ms|s|m>, cap:<n>, drop:old|new|summarize.",
     );
   });
+
+  it.each(["cap:1e3", "cap:0x10", "cap:4.9"])("rejects non-decimal-integer caps: %s", (cap) => {
+    const invalid = maybeHandleQueueDirective({
+      directives: parseInlineDirectives(`/queue collect ${cap}`),
+      cfg: {} as OpenClawConfig,
+      channel: "quietchat",
+    });
+
+    expect(invalid?.text).toContain("Invalid cap");
+  });
 });

src/auto-reply/reply/queue/directive.ts

@@ -1,4 +1,5 @@
 import { parseDurationMs } from "../../../cli/parse-duration.js";
+import { parseStrictPositiveInteger } from "../../../infra/parse-finite-number.js";
 import { normalizeOptionalLowercaseString } from "../../../shared/string-coerce.js";
 import { skipDirectiveArgPrefix, takeDirectiveToken } from "../directive-parsing.js";
 import { normalizeQueueDropPolicy, normalizeQueueMode } from "./normalize.js";
@@ -23,15 +24,7 @@ function parseQueueCap(raw?: string): number | undefined {
   if (!raw) {
     return undefined;
   }
-  const num = Number(raw);
-  if (!Number.isFinite(num)) {
-    return undefined;
-  }
-  const cap = Math.floor(num);
-  if (cap < 1) {
-    return undefined;
-  }
-  return cap;
+  return parseStrictPositiveInteger(raw);
 }
 
 function parseQueueDirectiveArgs(raw: string): {