feat: extend skills/list to support additional roots. (#10835)

Add an optional perCwdExtraUserRoots

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -14079,6 +14079,24 @@
         ],
         "type": "object"
       },
+      "SkillsListExtraRootsForCwd": {
+        "properties": {
+          "cwd": {
+            "type": "string"
+          },
+          "extraUserRoots": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          }
+        },
+        "required": [
+          "cwd",
+          "extraUserRoots"
+        ],
+        "type": "object"
+      },
       "SkillsListParams": {
         "$schema": "http://json-schema.org/draft-07/schema#",
         "properties": {
@@ -14092,6 +14110,17 @@
           "forceReload": {
             "description": "When true, bypass the skills cache and re-scan skills from disk.",
             "type": "boolean"
+          },
+          "perCwdExtraUserRoots": {
+            "default": null,
+            "description": "Optional per-cwd extra roots to scan as user-scoped skills.",
+            "items": {
+              "$ref": "#/definitions/v2/SkillsListExtraRootsForCwd"
+            },
+            "type": [
+              "array",
+              "null"
+            ]
           }
         },
         "title": "SkillsListParams",