Delete shell_command feature (#7024)

codex-rs/core/src/features.rs

@@ -31,9 +31,6 @@ pub enum Feature {
     GhostCommit,
     /// Use the single unified PTY-backed exec tool.
     UnifiedExec,
-    /// Use the shell command tool that takes `command` as a single string of
-    /// shell instead of an array of args passed to `execvp(3)`.
-    ShellCommandTool,
     /// Enable experimental RMCP features such as OAuth login.
     RmcpClient,
     /// Include the freeform apply_patch tool.
@@ -275,12 +272,6 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::Experimental,
         default_enabled: false,
     },
-    FeatureSpec {
-        id: Feature::ShellCommandTool,
-        key: "shell_command_tool",
-        stage: Stage::Experimental,
-        default_enabled: false,
-    },
     FeatureSpec {
         id: Feature::RmcpClient,
         key: "rmcp_client",

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

@@ -57,8 +57,6 @@ impl ToolsConfig {
             ConfigShellToolType::Disabled
         } else if features.enabled(Feature::UnifiedExec) {
             ConfigShellToolType::UnifiedExec
-        } else if features.enabled(Feature::ShellCommandTool) {
-            ConfigShellToolType::ShellCommand
         } else {
             model_family.shell_type.clone()
         };
@@ -1468,22 +1466,6 @@ mod tests {
         assert_contains_tool_names(&tools, &subset);
     }
 
-    #[test]
-    fn test_build_specs_shell_command_present() {
-        assert_model_tools(
-            "codex-mini-latest",
-            Features::with_defaults().enable(Feature::ShellCommandTool),
-            &[
-                "shell_command",
-                "list_mcp_resources",
-                "list_mcp_resource_templates",
-                "read_mcp_resource",
-                "update_plan",
-                "view_image",
-            ],
-        );
-    }
-
     #[test]
     #[ignore]
     fn test_parallel_support_flags() {