diff --git a/patches/patches/085_async2.patch b/patches/patches/085_async2.patch
deleted file mode 100644
index 7583d7c..0000000
--- a/patches/patches/085_async2.patch
+++ /dev/null
@@ -1,14 +0,0 @@
---- exercises/085_async2.zig	2026-04-01 19:22:50.017227542 +0200
-+++ answers/085_async2.zig	2026-04-01 19:21:57.569158481 +0200
-@@ -38,9 +38,9 @@
- 
-     // Now collect the result. What method on Future gives us
-     // the value, blocking if it isn't ready yet?
--    const answer = future.???(io);
-+    const answer = future.await(io);
- 
--    std.debug.print("The answer is: {}\n", .{answer});
-+    std.debug.print("the answer is: {}\n", .{answer});
- }
- 
- fn computeAnswer(a: u32, b: u32) u32 {
diff --git a/patches/patches/086_async3.patch b/patches/patches/086_async3.patch
deleted file mode 100644
index 3a3c2c4..0000000
--- a/patches/patches/086_async3.patch
+++ /dev/null
@@ -1,18 +0,0 @@
---- exercises/086_async3.zig	2026-04-01 22:51:05.540094851 +0200
-+++ answers/086_async3.zig	2026-04-01 22:50:44.579669189 +0200
-@@ -29,12 +29,12 @@
-     const io = init.io;
- 
-     // Launch both tasks asynchronously.
--    var future_a = io.async(slowAdd, .{ 10, 20 });
--    var future_b = ???(slowMul, .{ 6, 7 });
-+    var future_a = io.async(slowAdd, .{ 1, 2 });
-+    var future_b = io.async(slowMul, .{ 6, 7 });
- 
-     // Await both results.
-     const sum = future_a.await(io);
--    const product = future_b.???(io);
-+    const product = future_b.await(io);
- 
-     print("{} + {} = {}\n", .{ 1, 2, sum });
-     print("{} * {} = {}\n", .{ 6, 7, product });
diff --git a/patches/patches/087_async4.patch b/patches/patches/087_async4.patch
deleted file mode 100644
index 4883afd..0000000
--- a/patches/patches/087_async4.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- exercises/087_async4.zig	2026-04-01 23:17:31.066443941 +0200
-+++ answers/087_async4.zig	2026-04-01 23:17:39.251612131 +0200
-@@ -38,7 +38,7 @@
- 
-     // Wait for all tasks to finish.
-     // What Group method blocks until all tasks complete?
--    try group.???
-+    try group.await(io);
- 
-     print("All tasks finished!\n", .{});
- }
diff --git a/patches/patches/088_async5.patch b/patches/patches/088_async5.patch
deleted file mode 100644
index d88e820..0000000
--- a/patches/patches/088_async5.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- exercises/088_async5.zig	2026-04-01 23:40:40.505855238 +0200
-+++ answers/088_async5.zig	2026-04-01 23:40:10.176236971 +0200
-@@ -40,7 +40,7 @@
- 
-     // We don't want to wait 10 seconds!
-     // Which Future method requests cancellation AND returns the result?
--    const result = ???;
-+    const result = future.cancel(io);
- 
-     print("Task returned: {}\n", .{result});
- }
diff --git a/patches/patches/089_async6.patch b/patches/patches/089_async6.patch
deleted file mode 100644
index 4ba0b49..0000000
--- a/patches/patches/089_async6.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- exercises/089_async6.zig	2026-04-02 10:25:34.016616118 +0200
-+++ answers/089_async6.zig	2026-04-02 10:27:48.827144051 +0200
-@@ -47,7 +47,7 @@
- 
-     // Wait for the first finisher.
-     // What Select method returns the first completed result?
--    const winner = ???;
-+    const winner = try sel.await();
- 
-     switch (winner) {
-         .hare => |msg| print("Hare: {s}\n", .{msg}),
diff --git a/patches/patches/090_async7.patch b/patches/patches/090_async7.patch
deleted file mode 100644
index 2108d51..0000000
--- a/patches/patches/090_async7.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- exercises/090_async7.zig	2026-04-02 10:36:42.910708919 +0200
-+++ answers/090_async7.zig	2026-04-02 10:36:51.965884223 +0200
-@@ -49,8 +49,8 @@
-     for (0..times) |_| {
-         // Acquire the lock before modifying shared state.
-         // What Mutex method blocks until the lock is acquired?
--        state.mutex.??? catch return;
--        defer state.mutex.unlock(); // <-- what's missing here?
-+        state.mutex.lock(io) catch return;
-+        defer state.mutex.unlock(io);
- 
-         state.counter += 1;
-     }
diff --git a/patches/patches/091_async8.patch b/patches/patches/091_async8.patch
deleted file mode 100644
index 865292f..0000000
--- a/patches/patches/091_async8.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- exercises/091_async8.zig	2026-04-02 10:49:27.925721496 +0200
-+++ answers/091_async8.zig	2026-04-02 10:49:31.694795212 +0200
-@@ -43,7 +43,7 @@
-     // Send numbers 1 through 10 into the queue.
-     for (1..11) |i| {
-         // What Queue method sends a single element, blocking if full?
--        queue.???(io, @intCast(i)) catch return;
-+        queue.putOne(io, @intCast(i)) catch return;
-     }
-     // Signal that we're done sending.
-     queue.close(io);
diff --git a/patches/patches/092_async9.patch b/patches/patches/092_async9.patch
deleted file mode 100644
index b7c8de9..0000000
--- a/patches/patches/092_async9.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- exercises/092_async9.zig	2026-04-03 13:44:50.526780809 +0200
-+++ answers/092_async9.zig	2026-04-03 13:44:54.957870294 +0200
-@@ -36,7 +36,7 @@
-     // Launch with a guaranteed separate thread.
-     // Which Io method guarantees true concurrency?
-     // (Hint: unlike io.async, this one can fail!)
--    var future = try io.???(compute, .{io});
-+    var future = try io.concurrent(compute, .{io});
- 
-     print("Main thread continues...\n", .{});
- 
diff --git a/patches/patches/093_async10.patch b/patches/patches/093_async10.patch
deleted file mode 100644
index 69f7518..0000000
--- a/patches/patches/093_async10.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- exercises/093_async10.zig	2026-04-03 14:25:16.600025924 +0200
-+++ answers/093_async10.zig	2026-04-03 14:24:56.192615893 +0200
-@@ -50,8 +50,8 @@
- 
-     // Protect this section from cancellation.
-     // What method swaps the cancel protection state?
--    const old = io.???(. blocked);
--    defer _ = io.???(old);
-+    const old = io.swapCancelProtection(.blocked);
-+    defer _ = io.swapCancelProtection(old);
- 
-     // This sleep will NOT return error.Canceled even though
-     // we get canceled during it — protection is active!
diff --git a/patches/patches/095_interfaces.patch b/patches/patches/095_interfaces.patch
deleted file mode 100644
index cb5fd62..0000000
--- a/patches/patches/095_interfaces.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- exercises/095_interfaces.zig	2025-08-15 15:17:57.839348063 +0200
-+++ answers/095_interfaces.zig	2026-04-03 13:09:13.722917764 +0200
-@@ -106,7 +106,7 @@
-     for (my_insects) |insect| {
-         // Almost done! We want to print() each insect with a
-         // single method call here.
--        ???
-+        insect.print();
-     }
- }
-