diff --git a/Casks/agencyzero-experimental.rb b/Casks/agencyzero-experimental.rb
index ad19fb3..7ed3bb0 100644
--- a/Casks/agencyzero-experimental.rb
+++ b/Casks/agencyzero-experimental.rb
@@ -19,9 +19,9 @@
   # The bundle is ad-hoc signed until the application has a renewed Developer
   # ID and notarization path. Homebrew otherwise leaves quarantine in place and
   # macOS reports the application as damaged on first launch.
-  postflight do
-    system_command "/usr/bin/xattr",
-                   args: ["-dr", "com.apple.quarantine", "#{appdir}/AgencyZero Experimental.app"]
+  postflight_steps do
+    run "/usr/bin/xattr",
+        args: ["-dr", "com.apple.quarantine", "{{appdir}}/AgencyZero Experimental.app"]
   end
 
   zap trash: [
diff --git a/Casks/agencyzero.rb b/Casks/agencyzero.rb
index cc9afa1..179e466 100644
--- a/Casks/agencyzero.rb
+++ b/Casks/agencyzero.rb
@@ -29,9 +29,9 @@
   #
   # Delete this block once the bundle is notarized: leaving it in would strip a
   # Gatekeeper check that users should get.
-  postflight do
-    system_command "/usr/bin/xattr",
-                   args: ["-dr", "com.apple.quarantine", "#{appdir}/AgencyZero.app"]
+  postflight_steps do
+    run "/usr/bin/xattr",
+        args: ["-dr", "com.apple.quarantine", "{{appdir}}/AgencyZero.app"]
   end
 
   zap trash: [
diff --git a/Casks/agentcode.rb b/Casks/agentcode.rb
index 8f3a7c9..d1637e5 100644
--- a/Casks/agentcode.rb
+++ b/Casks/agentcode.rb
@@ -1,10 +1,8 @@
 cask "agentcode" do
-  # AgentCode is distributed from a fixed CDN path while releases remain
-  # private. Reinstalling the cask fetches the current signed archive.
-  version :latest
-  sha256 :no_check
+  version "0.1.1"
+  sha256 "5c92404ab3398adc4d91bf85dae4b6d23ca0dee9b4f59634ba46f59641843c2f"
 
-  url "https://24x.ai/agentcode/AgentCode-aarch64-apple-darwin.tar.gz"
+  url "https://24x.ai/agentcode/AgentCode-aarch64-apple-darwin.tar.gz?v=#{version}"
   name "AgentCode"
   desc "Persistent semantic workspace for coding agents"
   homepage "https://github.com/pathscale/agentcode"
@@ -18,25 +16,25 @@
   # The two Mach-O executables are ad-hoc signed rather than notarized.
   # Homebrew quarantines cask downloads, so clear that attribute before first
   # execution or Gatekeeper reports the binaries as damaged.
-  postflight do
-    system_command "/usr/bin/xattr",
-                   args: [
-                     "-dr",
-                     "com.apple.quarantine",
-                     "#{staged_path}/agentcode",
-                     "#{staged_path}/codeserver",
-                   ]
-    system_command "#{staged_path}/codeserver", args: ["install"]
-    system_command "#{staged_path}/codeserver", args: ["start"]
+  postflight_steps do
+    run "/usr/bin/xattr",
+        args: [
+          "-dr",
+          "com.apple.quarantine",
+          "{{staged_path}}/agentcode",
+          "{{staged_path}}/codeserver",
+        ]
+    run "{{staged_path}}/codeserver", args: ["install"]
+    run "{{staged_path}}/codeserver", args: ["start"]
   end
 
-  uninstall_preflight do
-    system_command "#{staged_path}/codeserver",
-                   args:         ["stop"],
-                   must_succeed: false
-    system_command "#{staged_path}/codeserver",
-                   args:         ["uninstall"],
-                   must_succeed: false
+  uninstall_preflight_steps do
+    run "{{staged_path}}/codeserver",
+        args:         ["stop"],
+        must_succeed: false
+    run "{{staged_path}}/codeserver",
+        args:         ["uninstall"],
+        must_succeed: false
   end
 
   zap trash: "~/Library/Application Support/com.pathscale.agentcode"
diff --git a/Casks/chuzz.rb b/Casks/chuzz.rb
index 3dbfa4b..2ae466b 100644
--- a/Casks/chuzz.rb
+++ b/Casks/chuzz.rb
@@ -31,9 +31,9 @@
   #
   # Delete this block once the bundle is notarized: leaving it in would strip a
   # Gatekeeper check that users should get.
-  postflight do
-    system_command "/usr/bin/xattr",
-                   args: ["-dr", "com.apple.quarantine", "#{appdir}/Chuzz.app"]
+  postflight_steps do
+    run "/usr/bin/xattr",
+        args: ["-dr", "com.apple.quarantine", "{{appdir}}/Chuzz.app"]
   end
 
   # Chuzz keeps no profile on disk yet: history and cookies live in memory for