From 46f092250bd561d97484fbf74eeee5ceec792abe Mon Sep 17 00:00:00 2001
From: ajayjha1 <ajayjha1886@gmail.com>
Date: Fri, 22 May 2026 14:37:56 +0530
Subject: [PATCH] fix: support lazy apply for non-Sonnet models like
 qwen3-coder-plus

lazyApplyPromptForModel returned undefined for any model not containing
'sonnet', causing streamLazyApply to throw 'Lazy apply not supported'
whenever edit_existing_file fell back to the LLM-based apply path.
Use the general-purpose prompt as the default for all models.
---
 core/edit/lazy/prompts.ts         | 8 ++------
 core/edit/lazy/streamLazyApply.ts | 4 ----
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/core/edit/lazy/prompts.ts b/core/edit/lazy/prompts.ts
index 1f2b5c02614..3dcb3ad5c55 100644
--- a/core/edit/lazy/prompts.ts
+++ b/core/edit/lazy/prompts.ts
@@ -54,10 +54,6 @@ function claudeSonnetLazyApplyPrompt(
 export function lazyApplyPromptForModel(
   model: string,
   provider: string,
-): LazyApplyPrompt | undefined {
-  if (model.includes("sonnet")) {
-    return claudeSonnetLazyApplyPrompt;
-  }
-
-  return undefined;
+): LazyApplyPrompt {
+  return claudeSonnetLazyApplyPrompt;
 }
diff --git a/core/edit/lazy/streamLazyApply.ts b/core/edit/lazy/streamLazyApply.ts
index f806e956f4c..11f2a115056 100644
--- a/core/edit/lazy/streamLazyApply.ts
+++ b/core/edit/lazy/streamLazyApply.ts
@@ -19,10 +19,6 @@ export async function* streamLazyApply(
   abortController: AbortController,
 ): AsyncGenerator<DiffLine> {
   const promptFactory = lazyApplyPromptForModel(llm.model, llm.providerName);
-  if (!promptFactory) {
-    throw new Error(`Lazy apply not supported for model ${llm.model}`);
-  }
-
   const promptMessages = promptFactory(oldCode, filename, newCode);
   const lazyCompletion = llm.streamChat(promptMessages, abortController.signal);