Allow runtime enablement for remote plugins (#24707)

experimentalFeature/enablement/set now accepts remote_plugin as a
supported runtime feature key

codex-rs/app-server/README.md

@@ -192,7 +192,7 @@ Example with notification opt-out:
 - `modelProvider/capabilities/read` — read provider-level capabilities for the currently configured model provider.
 - `experimentalFeature/list` — list feature flags with stage metadata (`beta`, `underDevelopment`, `stable`, etc.), enabled/default-enabled state, and cursor pagination. Pass `threadId` when showing feature state for an existing loaded thread so `enabled` is computed from that thread's refreshed config, including project-local config for the thread's cwd; if omitted, the server uses its default config resolution context. For non-beta flags, `displayName`/`description`/`announcement` are `null`.
 - `permissionProfile/list` — beta; list available permission profile ids with optional display `description` text, using cursor pagination. Pass `cwd` when the caller needs project-local `[permissions.<id>]` entries to be included in the current catalog view.
-- `experimentalFeature/enablement/set` — patch the in-memory process-wide runtime feature enablement for the currently supported feature keys (`apps`, `memories`, `plugins`, `tool_suggest`, `tool_call_mcp_elicitation`). For each feature, precedence is: cloud requirements > --enable <feature_name> > config.toml > experimentalFeature/enablement/set (new) > code default.
+- `experimentalFeature/enablement/set` — patch the in-memory process-wide runtime feature enablement for currently supported feature keys. For each feature, precedence is: cloud requirements > --enable <feature_name> > config.toml > experimentalFeature/enablement/set (new) > code default.
 - `environment/add` — experimental; add or replace a named remote environment by `environmentId` and `execServerUrl` for later selection by `thread/start` or `turn/start`; returns `{}` and does not change the default environment.
 - `collaborationMode/list` — list available collaboration mode presets (experimental, no pagination). Built-in presets do not select a model; the Plan preset selects medium reasoning effort. This response omits built-in developer instructions; clients should either pass `settings.developer_instructions: null` when setting a mode to use Codex's built-in instructions, or provide their own instructions explicitly.
 - `skills/list` — list skills for one or more `cwd` values (optional `forceReload`).

codex-rs/app-server/src/request_processors/config_processor.rs

@@ -54,6 +54,7 @@ const SUPPORTED_EXPERIMENTAL_FEATURE_ENABLEMENT: &[&str] = &[
     "mentions_v2",
     "plugins",
     "remote_control",
+    "remote_plugin",
     "tool_suggest",
     "tool_call_mcp_elicitation",
 ];

codex-rs/app-server/tests/suite/v2/experimental_feature_list.rs

@@ -340,6 +340,7 @@ async fn experimental_feature_enablement_set_only_updates_named_features() -> Re
         BTreeMap::from([
             ("memories".to_string(), true),
             ("plugins".to_string(), true),
+            ("remote_plugin".to_string(), true),
             ("tool_suggest".to_string(), true),
             ("tool_call_mcp_elicitation".to_string(), false),
         ]),
@@ -352,6 +353,7 @@ async fn experimental_feature_enablement_set_only_updates_named_features() -> Re
             enablement: BTreeMap::from([
                 ("memories".to_string(), true),
                 ("plugins".to_string(), true),
+                ("remote_plugin".to_string(), true),
                 ("tool_suggest".to_string(), true),
                 ("tool_call_mcp_elicitation".to_string(), false),
             ]),
@@ -381,6 +383,13 @@ async fn experimental_feature_enablement_set_only_updates_named_features() -> Re
             .and_then(|features| features.get("plugins")),
         Some(&json!(true))
     );
+    assert_eq!(
+        config
+            .additional
+            .get("features")
+            .and_then(|features| features.get("remote_plugin")),
+        Some(&json!(true))
+    );
     assert_eq!(
         config
             .additional
@@ -474,7 +483,7 @@ async fn experimental_feature_enablement_set_rejects_non_allowlisted_feature() -
     );
     assert!(
         error.message.contains(
-            "apps, memories, mentions_v2, plugins, remote_control, tool_suggest, tool_call_mcp_elicitation"
+            "apps, memories, mentions_v2, plugins, remote_control, remote_plugin, tool_suggest, tool_call_mcp_elicitation"
         ),
         "{}",
         error.message