feat: add auto-approval for codex exec (#5043)

codex-rs/core/src/features.rs

@@ -41,6 +41,8 @@ pub enum Feature {
     ViewImageTool,
     /// Allow the model to request web searches.
     WebSearchRequest,
+    /// Automatically approve all approval requests from the harness.
+    ApproveAll,
 }
 
 impl Feature {
@@ -247,4 +249,10 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::Stable,
         default_enabled: false,
     },
+    FeatureSpec {
+        id: Feature::ApproveAll,
+        key: "approve_all",
+        stage: Stage::Experimental,
+        default_enabled: false,
+    },
 ];