diff --git a/assets/oh-my-opencode.schema.json b/assets/oh-my-opencode.schema.json
index 8636df6a5..2c22747ab 100644
--- a/assets/oh-my-opencode.schema.json
+++ b/assets/oh-my-opencode.schema.json
@@ -1741,6 +1741,9 @@
       "additionalProperties": {
         "type": "object",
         "properties": {
+          "description": {
+            "type": "string"
+          },
           "model": {
             "type": "string"
           },
diff --git a/src/config/schema.ts b/src/config/schema.ts
index 2fdde902c..e827a5ce0 100644
--- a/src/config/schema.ts
+++ b/src/config/schema.ts
@@ -148,6 +148,8 @@ export const SisyphusAgentConfigSchema = z.object({
 })
 
 export const CategoryConfigSchema = z.object({
+  /** Human-readable description of the category's purpose. Shown in delegate_task prompt. */
+  description: z.string().optional(),
   model: z.string().optional(),
   variant: z.string().optional(),
   temperature: z.number().min(0).max(2).optional(),