diff --git a/README.md b/README.md
index 9a06f9e4..2449d571 100644
--- a/README.md
+++ b/README.md
@@ -179,6 +179,7 @@ The `asdf` core provides a [security policy](https://github.com/asdf-vm/asdf/sec
 | CocoaPods                     | [ronnnnn/asdf-cocoapods](https://github.com/ronnnnn/asdf-cocoapods)                                               |
 | Codefresh                     | [gurukulkarni/asdf-codefresh](https://github.com/gurukulkarni/asdf-codefresh)                                     |
 | CodeQL                        | [bored-engineer/asdf-codeql](https://github.com/bored-engineer/asdf-codeql)                                       |
+| codex                         | [TimothyMerlin/asdf-codex](https://github.com/TimothyMerlin/asdf-codex)                                           |
 | Colima                        | [CrouchingMuppet/asdf-colima](https://github.com/CrouchingMuppet/asdf-colima)                                     |
 | coredns                       | [s3than/asdf-coredns](https://github.com/s3than/asdf-coredns)                                                     |
 | Conan                         | [amrox/asdf-pyapp](https://github.com/amrox/asdf-pyapp)                                                           |
diff --git a/plugins/codex b/plugins/codex
new file mode 100644
index 00000000..ada1fa2f
--- /dev/null
+++ b/plugins/codex
@@ -0,0 +1 @@
+repository = https://github.com/TimothyMerlin/asdf-codex.git