[plugins] Inject remote_plugin_id into install elicitations (#26409)

Summary
- Propagate cached remote plugin IDs through Codex plugin discovery.
- Inject `remote_plugin_id` and connector IDs into
`request_plugin_install` elicitation `_meta` from the resolved plugin.
- Keep the remote plugin ID out of the model-facing tool schema,
arguments, and result.

Validation
- `just test -p codex-tools`
- `just test -p codex-core-plugins`
- `just test -p codex-core
list_tool_suggest_discoverable_plugins_includes_cached_remote_global_plugins`
- `just fix -p codex-tools`
- `just fix -p codex-core-plugins`
- `just fix -p codex-core`
- `git diff --check`
- `just test -p codex-core` was also attempted: 2,581 passed, 55 failed,
and 1 timed out across unrelated sandbox/environment-sensitive
integration tests.

codex-rs/tools/src/request_plugin_install_tests.rs

@@ -57,6 +57,8 @@ fn build_request_plugin_install_elicitation_request_uses_expected_shape() {
                     install_url: Some(
                         "https://chatgpt.com/apps/google-calendar/connector_2128aebfecb84f64a069897515042a44"
                     ),
+                    remote_plugin_id: None,
+                    app_connector_ids: None,
                 })),
                 message: "Plan and reference events from your calendar".to_string(),
                 requested_schema: McpElicitationSchema {
@@ -71,15 +73,16 @@ fn build_request_plugin_install_elicitation_request_uses_expected_shape() {
 }
 
 #[test]
-fn build_request_plugin_install_elicitation_request_for_plugin_omits_install_url() {
+fn build_request_plugin_install_elicitation_request_injects_plugin_metadata() {
     let args = RequestPluginInstallArgs {
         tool_type: DiscoverableToolType::Plugin,
         action_type: DiscoverableToolAction::Install,
-        tool_id: "sample@openai-curated".to_string(),
+        tool_id: "sample@openai-curated-remote".to_string(),
         suggest_reason: "Use the sample plugin's skills and MCP server".to_string(),
     };
     let plugin = DiscoverableTool::Plugin(Box::new(DiscoverablePluginInfo {
-        id: "sample@openai-curated".to_string(),
+        id: "sample@openai-curated-remote".to_string(),
+        remote_plugin_id: Some("plugins~Plugin_sample".to_string()),
         name: "Sample Plugin".to_string(),
         description: Some("Includes skills, MCP servers, and apps.".to_string()),
         has_skills: true,
@@ -109,9 +112,11 @@ fn build_request_plugin_install_elicitation_request_for_plugin_omits_install_url
                     tool_type: DiscoverableToolType::Plugin,
                     suggest_type: DiscoverableToolAction::Install,
                     suggest_reason: "Use the sample plugin's skills and MCP server",
-                    tool_id: "sample@openai-curated",
+                    tool_id: "sample@openai-curated-remote",
                     tool_name: "Sample Plugin",
                     install_url: None,
+                    remote_plugin_id: Some("plugins~Plugin_sample"),
+                    app_connector_ids: Some(&["connector_calendar".to_string()]),
                 })),
                 message: "Use the sample plugin's skills and MCP server".to_string(),
                 requested_schema: McpElicitationSchema {
@@ -127,13 +132,28 @@ fn build_request_plugin_install_elicitation_request_for_plugin_omits_install_url
 
 #[test]
 fn build_request_plugin_install_meta_uses_expected_shape() {
+    let connector = DiscoverableTool::Connector(Box::new(AppInfo {
+        id: "connector_68df038e0ba48191908c8434991bbac2".to_string(),
+        name: "Gmail".to_string(),
+        description: None,
+        logo_url: None,
+        logo_url_dark: None,
+        distribution_channel: None,
+        branding: None,
+        app_metadata: None,
+        labels: None,
+        install_url: Some(
+            "https://chatgpt.com/apps/gmail/connector_68df038e0ba48191908c8434991bbac2".to_string(),
+        ),
+        is_accessible: false,
+        is_enabled: true,
+        plugin_display_names: Vec::new(),
+    }));
     let meta = build_request_plugin_install_meta(
         DiscoverableToolType::Connector,
         DiscoverableToolAction::Install,
         "Find and reference emails from your inbox",
-        "connector_68df038e0ba48191908c8434991bbac2",
-        "Gmail",
-        Some("https://chatgpt.com/apps/gmail/connector_68df038e0ba48191908c8434991bbac2"),
+        &connector,
     );
 
     assert_eq!(
@@ -149,6 +169,8 @@ fn build_request_plugin_install_meta_uses_expected_shape() {
             install_url: Some(
                 "https://chatgpt.com/apps/gmail/connector_68df038e0ba48191908c8434991bbac2"
             ),
+            remote_plugin_id: None,
+            app_connector_ids: None,
         },
     );
 }