chore: enable sub agents (#11173)

codex-rs/core/src/agent/role.rs

@@ -95,7 +95,6 @@ Rules:
                 reasoning_effort: Some(ReasoningEffort::Medium),
                 description: r#"Use `explorer` for all codebase questions.
 Explorers are fast and authoritative.
-Always prefer them over manual search or file reading.
 Rules:
 - Ask explorers first and precisely.
 - Do not re-read or re-search code they cover.

codex-rs/core/src/features.rs

@@ -432,6 +432,12 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::Deprecated,
         default_enabled: false,
     },
+    FeatureSpec {
+        id: Feature::Collab,
+        key: "collab",
+        stage: Stage::Stable,
+        default_enabled: true,
+    },
     // Experimental program. Rendered in the `/experimental` menu for users.
     FeatureSpec {
         id: Feature::RuntimeMetrics,
@@ -511,16 +517,6 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::Stable,
         default_enabled: true,
     },
-    FeatureSpec {
-        id: Feature::Collab,
-        key: "collab",
-        stage: Stage::Experimental {
-            name: "Sub-agents",
-            menu_description: "Ask Codex to spawn multiple agents to parallelize the work and win in efficiency.",
-            announcement: "NEW: Sub-agents can now be spawned by Codex. Enable in /experimental and restart Codex!",
-        },
-        default_enabled: false,
-    },
     FeatureSpec {
         id: Feature::Apps,
         key: "apps",

codex-rs/core/src/tools/spec.rs

@@ -1666,6 +1666,11 @@ mod tests {
                 external_web_access: Some(true),
             },
             create_view_image_tool(),
+            create_spawn_agent_tool(),
+            create_send_input_tool(),
+            create_resume_agent_tool(),
+            create_wait_tool(),
+            create_close_agent_tool(),
         ] {
             expected.insert(tool_name(&spec).to_string(), spec);
         }
@@ -1860,6 +1865,11 @@ mod tests {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -1882,6 +1892,11 @@ mod tests {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -1906,6 +1921,11 @@ mod tests {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -1930,6 +1950,11 @@ mod tests {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -1951,6 +1976,11 @@ mod tests {
                 "request_user_input",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -1973,6 +2003,11 @@ mod tests {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -1994,6 +2029,11 @@ mod tests {
                 "request_user_input",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -2016,6 +2056,11 @@ mod tests {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -2062,6 +2107,11 @@ mod tests {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }
@@ -2085,6 +2135,11 @@ mod tests {
                 "request_user_input",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         );
     }

codex-rs/core/tests/suite/model_tools.rs

@@ -81,6 +81,11 @@ async fn model_selects_expected_tools() {
                 "request_user_input",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         ),
         "codex-mini-latest should expose the local shell tool",
@@ -100,6 +105,11 @@ async fn model_selects_expected_tools() {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         ),
         "gpt-5-codex should expose the apply_patch tool",
@@ -119,6 +129,11 @@ async fn model_selects_expected_tools() {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         ),
         "gpt-5.1-codex should expose the apply_patch tool",
@@ -137,6 +152,11 @@ async fn model_selects_expected_tools() {
                 "request_user_input",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         ),
         "gpt-5 should expose the apply_patch tool",
@@ -156,6 +176,11 @@ async fn model_selects_expected_tools() {
                 "apply_patch",
                 "web_search",
                 "view_image",
+                "spawn_agent",
+                "send_input",
+                "resume_agent",
+                "wait",
+                "close_agent",
             ],
         ),
         "gpt-5.1 should expose the apply_patch tool",
@@ -173,7 +198,12 @@ async fn model_selects_expected_tools() {
             "request_user_input".to_string(),
             "apply_patch".to_string(),
             "web_search".to_string(),
-            "view_image".to_string()
+            "view_image".to_string(),
+            "spawn_agent".to_string(),
+            "send_input".to_string(),
+            "resume_agent".to_string(),
+            "wait".to_string(),
+            "close_agent".to_string()
         ],
         "exp-5.1 should expose the apply_patch tool",
     );

codex-rs/core/tests/suite/prompt_caching.rs

@@ -153,6 +153,11 @@ async fn prompt_tools_are_consistent_across_requests() -> anyhow::Result<()> {
         "apply_patch",
         "web_search",
         "view_image",
+        "spawn_agent",
+        "send_input",
+        "resume_agent",
+        "wait",
+        "close_agent",
     ]);
     let body0 = req1.single_request().body_json();