Support disabling tool suggest for specific tools. (#20072)

## Summary
- Add `disable_tool_suggest` to app and plugin config, schema, and
TypeScript output
- Exclude disabled connectors and plugins from tool suggestion discovery
- Persist "never show again" tool-suggestion choices back into
`config.toml`
- Update config docs and add coverage for connector and plugin
suppression

## Testing
- Added and updated unit tests for config persistence and tool-suggest
filtering
- Not run (not requested)

codex-rs/core/src/session/mod.rs

@@ -18,6 +18,7 @@ use crate::build_available_skills;
 use crate::commit_attribution::commit_message_trailer_instruction;
 use crate::compact;
 use crate::config::ManagedFeatures;
+use crate::config::resolve_tool_suggest_config_from_layer_stack;
 use crate::connectors;
 use crate::context::ApprovedCommandPrefixSaved;
 use crate::context::AppsInstructions;
@@ -1407,6 +1408,8 @@ impl Session {
         config.config_layer_stack = config
             .config_layer_stack
             .with_user_config(&config_toml_path, user_config);
+        config.tool_suggest =
+            resolve_tool_suggest_config_from_layer_stack(&config.config_layer_stack);
         state.session_configuration.original_config_do_not_use = Arc::new(config);
         self.services.skills_manager.clear_cache();
         self.services.plugins_manager.clear_cache();

codex-rs/core/src/session/tests.rs

@@ -19,6 +19,7 @@ use codex_config::NetworkDomainPermissionsToml;
 use codex_config::RequirementSource;
 use codex_config::Sourced;
 use codex_config::loader::project_trust_key;
+use codex_config::types::ToolSuggestDisabledTool;
 
 use codex_features::Feature;
 use codex_features::Features;
@@ -1155,6 +1156,35 @@ async fn reload_user_config_layer_updates_effective_apps_config() {
     assert_eq!(app.destructive_enabled, Some(false));
 }
 
+#[tokio::test]
+async fn reload_user_config_layer_updates_effective_tool_suggest_config() {
+    let (session, _turn_context) = make_session_and_context().await;
+    let codex_home = session.codex_home().await;
+    std::fs::create_dir_all(&codex_home).expect("create codex home");
+    let config_toml_path = codex_home.join(CONFIG_TOML_FILE);
+    std::fs::write(
+        &config_toml_path,
+        r#"[tool_suggest]
+disabled_tools = [
+  { type = "connector", id = " calendar " },
+  { type = "plugin", id = "slack@openai-curated" },
+]
+"#,
+    )
+    .expect("write user config");
+
+    session.reload_user_config_layer().await;
+
+    let config = session.get_config().await;
+    assert_eq!(
+        config.tool_suggest.disabled_tools,
+        vec![
+            ToolSuggestDisabledTool::connector("calendar"),
+            ToolSuggestDisabledTool::plugin("slack@openai-curated"),
+        ]
+    );
+}
+
 #[test]
 fn filter_connectors_for_input_skips_duplicate_slug_mentions() {
     let connectors = vec![