refactor(coding-agent): reorganized todo settings namespace and refactored tool availability checks

- Reorganized todo-related settings from `todoCompletion.*` namespace to `todo.*` namespace with separate `todo.enabled` and `todo.reminders.*` properties.
- Updated settings access pattern in agent session from grouped settings object to flat dot-notation keys for improved consistency.
- Refactored todo_write tool availability check to independently gate on both `todo.enabled` setting and absence of submit_result.

packages/coding-agent/src/config/settings-schema.ts

@@ -264,12 +264,12 @@ export const SETTINGS_SCHEMA = {
 	// ─────────────────────────────────────────────────────────────────────────
 	// Todo completion settings
 	// ─────────────────────────────────────────────────────────────────────────
-	"todoCompletion.enabled": {
+	"todo.reminders": {
 		type: "boolean",
 		default: false,
-		ui: { tab: "behavior", label: "Todo completion", description: "Remind agent to complete todos before stopping" },
+		ui: { tab: "behavior", label: "Todo reminders", description: "Remind agent to complete todos before stopping" },
 	},
-	"todoCompletion.maxReminders": {
+	"todo.reminders.max": {
 		type: "number",
 		default: 3,
 		ui: {
@@ -280,6 +280,15 @@ export const SETTINGS_SCHEMA = {
 		},
 	},
 
+	// ─────────────────────────────────────────────────────────────────────────
+	// Todos settings
+	// ─────────────────────────────────────────────────────────────────────────
+	"todo.enabled": {
+		type: "boolean",
+		default: true,
+		ui: { tab: "tools", label: "Todos", description: "Enable the todo_write tool for task tracking" },
+	},
+
 	// ─────────────────────────────────────────────────────────────────────────
 	// Startup settings
 	// ─────────────────────────────────────────────────────────────────────────
@@ -822,7 +831,6 @@ export interface BashInterceptorRule {
 export interface GroupTypeMap {
 	compaction: CompactionSettings;
 	retry: RetrySettings;
-	todoCompletion: TodoCompletionSettings;
 	branchSummary: BranchSummarySettings;
 	skills: SkillsSettings;
 	commit: CommitSettings;

packages/coding-agent/src/session/agent-session.ts

@@ -2461,13 +2461,15 @@ Be thorough - include exact file paths, function names, error messages, and tech
 	 * Check if agent stopped with incomplete todos and prompt to continue.
 	 */
 	private async _checkTodoCompletion(): Promise<void> {
-		const todoSettings = this.settings.getGroup("todoCompletion");
-		if (!todoSettings.enabled) {
+		const remindersEnabled = this.settings.get("todo.reminders");
+		const todosEnabled = this.settings.get("todo.enabled");
+		if (!remindersEnabled || !todosEnabled) {
 			this._todoReminderCount = 0;
 			return;
 		}
 
-		if (this._todoReminderCount >= todoSettings.maxReminders) {
+		const remindersMax = this.settings.get("todo.reminders.max");
+		if (this._todoReminderCount >= remindersMax) {
 			logger.debug("Todo completion: max reminders reached", { count: this._todoReminderCount });
 			return;
 		}
@@ -2503,7 +2505,7 @@ Be thorough - include exact file paths, function names, error messages, and tech
 			`<system_reminder>\n` +
 			`You stopped with ${incomplete.length} incomplete todo item(s):\n${todoList}\n\n` +
 			`Please continue working on these tasks or mark them complete if finished.\n` +
-			`(Reminder ${this._todoReminderCount}/${todoSettings.maxReminders})\n` +
+			`(Reminder ${this._todoReminderCount}/${remindersMax})\n` +
 			`</system_reminder>`;
 
 		logger.debug("Todo completion: sending reminder", {
@@ -2516,7 +2518,7 @@ Be thorough - include exact file paths, function names, error messages, and tech
 			type: "todo_reminder",
 			todos: incomplete,
 			attempt: this._todoReminderCount,
-			maxAttempts: todoSettings.maxReminders,
+			maxAttempts: remindersMax,
 		});
 
 		// Inject reminder and continue the conversation

packages/coding-agent/src/tools/index.ts

@@ -278,6 +278,7 @@ export async function createTools(session: ToolSession, toolNames?: string[]): P
 		if (name === "lsp") return enableLsp;
 		if (name === "bash") return allowBash;
 		if (name === "python") return allowPython;
+		if (name === "todo_write") return !includeSubmitResult && session.settings.get("todo.enabled");
 		return true;
 	};
 	if (includeSubmitResult && requestedTools && !requestedTools.includes("submit_result")) {