chore: debug flag to hide some parameters (#17002)

codex-rs/features/src/lib.rs

@@ -138,6 +138,8 @@ pub enum Feature {
     Collab,
     /// Enable task-path-based multi-agent routing.
     MultiAgentV2,
+    /// Hide spawn_agent agent/model override fields from the model-visible tool schema.
+    DebugHideSpawnAgentMetadata,
     /// Enable CSV-backed agent job tools.
     SpawnCsv,
     /// Enable apps.
@@ -706,6 +708,12 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::UnderDevelopment,
         default_enabled: false,
     },
+    FeatureSpec {
+        id: Feature::DebugHideSpawnAgentMetadata,
+        key: "debug_hide_spawn_agent_metadata",
+        stage: Stage::UnderDevelopment,
+        default_enabled: false,
+    },
     FeatureSpec {
         id: Feature::SpawnCsv,
         key: "enable_fanout",