disable round-robin for sequential

README.md

@@ -113,10 +113,11 @@ prompts:
 > tasks, only the first two models are used. The third model is only touched when
 > a third concurrent task starts. Freed model slots are reused before new ones
 > are allocated.
->
 > **Automatic failover**: if a provider/API is unreachable (rate limit, 503, etc.),
 > the task automatically cycles to the next model in the list without counting it
 > as a task failure. Each model is tried once before the task is marked as failed.
+> **NOTE**: this is only used in parallel execution, in sequential mode the
+> parent pi session's model is used
 
 ## State Files
 

src/executor.ts

@@ -411,10 +411,9 @@ export async function executeBatch(
 		return;
 	}
 
-	// Execute sequentially
+	// Execute sequentially (no round-robin — inherit parent model)
 	for (const task of tasks) {
 		try {
-			const model = roundRobin?.assign(task.id);
 			await executeTask(
 				task,
 				project,
@@ -423,14 +422,11 @@ export async function executeBatch(
 				ctx,
 				sendChatMessage,
 				projectDir,
-				undefined,
-				model,
-				roundRobin,
 			);
 		} catch (error) {
 			// Task failed — stop the batch. Dependent tasks are blocked by
 			// the DAG layer (getBlockedTasks) so they won't appear in this batch.
-			roundRobin?.release(task.id);
+
 			const errorMsg = error instanceof Error ? error.message : String(error);
 			progress.markFailed(task.id, errorMsg);
 			sendChatMessage?.(`✗ ${task.id} · ${task.title} — ${errorMsg}`);