diff --git a/.agents/skills/cobalt/agents/openai.yaml b/.agents/skills/cobalt/agents/openai.yaml
new file mode 100644
index 00000000..439496b3
--- /dev/null
+++ b/.agents/skills/cobalt/agents/openai.yaml
@@ -0,0 +1,6 @@
+interface:
+  display_name: "Cobalt"
+  short_description: "Repo-specific patterns and workflows for cobalt"
+  default_prompt: "Use the cobalt repo skill to follow existing architecture, testing, and workflow conventions."
+policy:
+  allow_implicit_invocation: true
\ No newline at end of file