security(polymarket-browse): improve response size limit with dynamic calculation

- Replace fixed 10MB limit with dynamic calculation
- get_max_response_size() computes limit based on PAGE_SIZE * multiplier
- Uses 10x multiplier (e.g., PAGE_SIZE=50 -> ~500KB * 10 = ~5MB)
- Clamped between 10MB minimum and 100MB maximum
- Formula: max(PAGE_SIZE * multiplier, 10MB) capped at 100MB

skills/polymarket-browse/scripts/browse.py

@@ -97,9 +97,23 @@ class FetchResult(TypedDict):
 PAGE_SIZE = 50
 MAX_RETRIES = 5
 INITIAL_RETRY_DELAY = 2  # exponential backoff starts at 2s
-MAX_RESPONSE_SIZE = 10 * 1024 * 1024  # 10MB limit per API response
+MAX_RESPONSE_SIZE_MULTIPLIER = 10  # Response size limit = PAGE_SIZE * multiplier
+MAX_RESPONSE_SIZE_MIN = 10 * 1024 * 1024  # 10MB minimum
+MAX_RESPONSE_SIZE_MAX = 100 * 1024 * 1024  # 100MB maximum for safety
 WIB = timezone(timedelta(hours=7))  # UTC+7 for Indonesian users
 
+
+def get_max_response_size(page_size: int = PAGE_SIZE) -> int:
+    """
+    Calculate max response size based on expected payload.
+    Uses 10x multiplier: if PAGE_SIZE=50 events, expected ~500KB-5MB,
+    so 10x gives 5MB-50MB. Clamped between 10MB and 100MB.
+    """
+    multiplier = MAX_RESPONSE_SIZE_MULTIPLIER * page_size * 1024  # rough estimate
+    size = max(multiplier, MAX_RESPONSE_SIZE_MIN)
+    return min(size, MAX_RESPONSE_SIZE_MAX)
+
+
 GAME_CATEGORIES = {
     "All Esports": "Esports",
     "Counter Strike": "Counter Strike",
@@ -180,9 +194,10 @@ def fetch_page(
             req = Request(url, headers={"User-Agent": "Mozilla/5.0"})
             with urlopen(req, timeout=10) as r:
                 data = r.read()
-                if len(data) > MAX_RESPONSE_SIZE:
+                max_size = get_max_response_size(PAGE_SIZE)
+                if len(data) > max_size:
                     raise ValueError(
-                        f"API response too large: {len(data)} bytes (max {MAX_RESPONSE_SIZE})"
+                        f"API response too large: {len(data)} bytes (max {max_size})"
                     )
                 return json.loads(data)
         except Exception: