diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+
+## [0.23.0.1] - 2026-01-26
+
+### Changed
+
+* Fixed AI autodetection
+
 ## [0.23.0.0] - 2026-01-26
 
 ### Added
diff --git a/src/Test/Syd/OptParse.hs b/src/Test/Syd/OptParse.hs
--- a/src/Test/Syd/OptParse.hs
+++ b/src/Test/Syd/OptParse.hs
@@ -432,7 +432,7 @@
               [ help "Activate AI executor mode based on env vars",
                 reader exists,
                 -- Feel free to add env vars here.
-                env "CLAUDECODE",
+                unprefixedEnv "CLAUDECODE",
                 metavar "ANY"
               ]
           ]
diff --git a/sydtest.cabal b/sydtest.cabal
--- a/sydtest.cabal
+++ b/sydtest.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           sydtest
-version:        0.23.0.0
+version:        0.23.0.1
 synopsis:       A modern testing framework for Haskell with good defaults and advanced testing features.
 description:    A modern testing framework for Haskell with good defaults and advanced testing features. Sydtest aims to make the common easy and the hard possible. See https://github.com/NorfairKing/sydtest#readme for more information.
 category:       Testing
@@ -75,7 +75,7 @@
     , fast-myers-diff >=0.0.1
     , filepath
     , mtl
-    , opt-env-conf >=0.5
+    , opt-env-conf >=0.10
     , path
     , path-io
     , pretty-show