diff --git a/l0-transport/png.zig b/l0-transport/png.zig
index d4afec1..4c70cec 100644
--- a/l0-transport/png.zig
+++ b/l0-transport/png.zig
@@ -71,9 +71,9 @@ pub const PngState = struct {
         const timing_dist_val = entropy[1] % 3;
         
         // Use wrapping arithmetic to avoid overflow panics in debug mode
-        const size_mean_val = @as(u16, 1200) +% @as(u16, @as(u32, entropy[2]) * 2);
-        const size_stddev_val = @as(u16, 100) +% @as(u16, entropy[3]);
-        const epoch_count = @as(u32, 100) +% (@as(u32, entropy[7]) * 4);
+        const size_mean_val = @as(u16, 1200 +% (@as(u16, entropy[2]) * 2));
+        const size_stddev_val = @as(u16, 100 +% entropy[3]);
+        const epoch_count: u32 = 100 +% (@as(u32, entropy[7]) * 4);
         
         return EpochProfile{
             .size_distribution = @enumFromInt(@as(u32, size_dist_val)),
diff --git a/l4-feed/feed.zig b/l4-feed/feed.zig
index cf839db..383b3b7 100644
--- a/l4-feed/feed.zig
+++ b/l4-feed/feed.zig
@@ -36,7 +36,7 @@ pub const FeedEvent = extern struct {
     parent_id: u64,             // 0 = none (for replies/threading)
     
     comptime {
-        std.debug.assert(@sizeOf(FeedEvent) == 104);
+        std.debug.assert(@sizeOf(FeedEvent) == 96);
     }
 };
 
@@ -196,7 +196,7 @@ pub const FeedStore = struct {
 // ============================================================================
 
 test "FeedEvent size" {
-    comptime try std.testing.expectEqual(@sizeOf(FeedEvent), 104);
+    comptime try std.testing.expectEqual(@sizeOf(FeedEvent), 96);
 }
 
 test "EventType conversion" {