diff --git a/codex-rs/core/config.schema.json b/codex-rs/core/config.schema.json
index 773218af7..580f3084e 100644
--- a/codex-rs/core/config.schema.json
+++ b/codex-rs/core/config.schema.json
@@ -99,7 +99,7 @@
         "experimental_windows_sandbox": {
           "type": "boolean"
         },
-        "hierarchical_agents": {
+        "child_agents_md": {
           "type": "boolean"
         },
         "include_apply_patch_tool": {
@@ -559,7 +559,7 @@
             "experimental_windows_sandbox": {
               "type": "boolean"
             },
-            "hierarchical_agents": {
+            "child_agents_md": {
               "type": "boolean"
             },
             "include_apply_patch_tool": {
diff --git a/codex-rs/core/src/features.rs b/codex-rs/core/src/features.rs
index 5a9054eb9..620e777f4 100644
--- a/codex-rs/core/src/features.rs
+++ b/codex-rs/core/src/features.rs
@@ -89,7 +89,7 @@ pub enum Feature {
     /// Experimental shell snapshotting.
     ShellSnapshot,
     /// Append additional AGENTS.md guidance to user instructions.
-    HierarchicalAgents,
+    ChildAgentsMd,
     /// Experimental TUI v2 (viewport) implementation.
     Tui2,
     /// Enforce UTF8 output in Powershell.
@@ -359,8 +359,8 @@ pub const FEATURES: &[FeatureSpec] = &[
         default_enabled: false,
     },
     FeatureSpec {
-        id: Feature::HierarchicalAgents,
-        key: "hierarchical_agents",
+        id: Feature::ChildAgentsMd,
+        key: "child_agents_md",
         stage: Stage::Experimental,
         default_enabled: false,
     },
diff --git a/codex-rs/core/src/project_doc.rs b/codex-rs/core/src/project_doc.rs
index 365475e62..c763755af 100644
--- a/codex-rs/core/src/project_doc.rs
+++ b/codex-rs/core/src/project_doc.rs
@@ -69,7 +69,7 @@ pub(crate) async fn get_user_instructions(
         output.push_str(&skills_section);
     }
 
-    if config.features.enabled(Feature::HierarchicalAgents) {
+    if config.features.enabled(Feature::ChildAgentsMd) {
         if !output.is_empty() {
             output.push_str("\n\n");
         }
diff --git a/codex-rs/core/tests/suite/hierarchical_agents.rs b/codex-rs/core/tests/suite/hierarchical_agents.rs
index cc7b78a94..5dfa63648 100644
--- a/codex-rs/core/tests/suite/hierarchical_agents.rs
+++ b/codex-rs/core/tests/suite/hierarchical_agents.rs
@@ -17,7 +17,7 @@ async fn hierarchical_agents_appends_to_project_doc_in_user_instructions() {
     let resp_mock = mount_sse_once(&server, sse_completed("resp1")).await;
 
     let mut builder = test_codex().with_config(|config| {
-        config.features.enable(Feature::HierarchicalAgents);
+        config.features.enable(Feature::ChildAgentsMd);
         std::fs::write(config.cwd.join("AGENTS.md"), "be nice").expect("write AGENTS.md");
     });
     let test = builder.build(&server).await.expect("build test codex");
@@ -52,7 +52,7 @@ async fn hierarchical_agents_emits_when_no_project_doc() {
     let resp_mock = mount_sse_once(&server, sse_completed("resp1")).await;
 
     let mut builder = test_codex().with_config(|config| {
-        config.features.enable(Feature::HierarchicalAgents);
+        config.features.enable(Feature::ChildAgentsMd);
     });
     let test = builder.build(&server).await.expect("build test codex");
 
diff --git a/docs/agents_md.md b/docs/agents_md.md
index 40222d113..3df0facdf 100644
--- a/docs/agents_md.md
+++ b/docs/agents_md.md
@@ -4,4 +4,4 @@ For information about AGENTS.md, see [this documentation](https://developers.ope
 
 ## Hierarchical agents message
 
-When the `hierarchical_agents` feature flag is enabled (via `[features]` in `config.toml`), Codex appends additional guidance about AGENTS.md scope and precedence to the user instructions message and emits that message even when no AGENTS.md is present.
+When the `child_agents_md` feature flag is enabled (via `[features]` in `config.toml`), Codex appends additional guidance about AGENTS.md scope and precedence to the user instructions message and emits that message even when no AGENTS.md is present.