diff --git a/internal/runtime/executor/aistudio_executor.go b/internal/runtime/executor/aistudio_executor.go
index 73491d82..37e85377 100644
--- a/internal/runtime/executor/aistudio_executor.go
+++ b/internal/runtime/executor/aistudio_executor.go
@@ -285,7 +285,10 @@ func (e *AIStudioExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth
 			if event.Err != nil {
 				helps.RecordAPIResponseError(ctx, e.cfg, event.Err)
 				reporter.PublishFailure(ctx)
-				out <- cliproxyexecutor.StreamChunk{Err: fmt.Errorf("wsrelay: %v", event.Err)}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Err: fmt.Errorf("wsrelay: %v", event.Err)}:
+				case <-ctx.Done():
+				}
 				return false
 			}
 			switch event.Type {
@@ -303,7 +306,11 @@ func (e *AIStudioExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth
 					}
 					lines := sdktranslator.TranslateStream(ctx, body.toFormat, opts.SourceFormat, req.Model, opts.OriginalRequest, translatedReq, filtered, &param)
 					for i := range lines {
-						out <- cliproxyexecutor.StreamChunk{Payload: ensureColonSpacedJSON(lines[i])}
+						select {
+						case out <- cliproxyexecutor.StreamChunk{Payload: ensureColonSpacedJSON(lines[i])}:
+						case <-ctx.Done():
+							return false
+						}
 					}
 					break
 				}
@@ -319,14 +326,21 @@ func (e *AIStudioExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth
 				}
 				lines := sdktranslator.TranslateStream(ctx, body.toFormat, opts.SourceFormat, req.Model, opts.OriginalRequest, translatedReq, event.Payload, &param)
 				for i := range lines {
-					out <- cliproxyexecutor.StreamChunk{Payload: ensureColonSpacedJSON(lines[i])}
+					select {
+					case out <- cliproxyexecutor.StreamChunk{Payload: ensureColonSpacedJSON(lines[i])}:
+					case <-ctx.Done():
+						return false
+					}
 				}
 				reporter.Publish(ctx, helps.ParseGeminiUsage(event.Payload))
 				return false
 			case wsrelay.MessageTypeError:
 				helps.RecordAPIResponseError(ctx, e.cfg, event.Err)
 				reporter.PublishFailure(ctx)
-				out <- cliproxyexecutor.StreamChunk{Err: fmt.Errorf("wsrelay: %v", event.Err)}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Err: fmt.Errorf("wsrelay: %v", event.Err)}:
+				case <-ctx.Done():
+				}
 				return false
 			}
 			return true
diff --git a/internal/runtime/executor/antigravity_executor.go b/internal/runtime/executor/antigravity_executor.go
index 280c799a..c07680e8 100644
--- a/internal/runtime/executor/antigravity_executor.go
+++ b/internal/runtime/executor/antigravity_executor.go
@@ -894,12 +894,19 @@ attemptLoop:
 						reporter.Publish(ctx, detail)
 					}
 
-					out <- cliproxyexecutor.StreamChunk{Payload: payload}
+					select {
+					case out <- cliproxyexecutor.StreamChunk{Payload: payload}:
+					case <-ctx.Done():
+						return
+					}
 				}
 				if errScan := scanner.Err(); errScan != nil {
 					helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 					reporter.PublishFailure(ctx)
-					out <- cliproxyexecutor.StreamChunk{Err: errScan}
+					select {
+					case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+					case <-ctx.Done():
+					}
 				} else {
 					reporter.EnsurePublished(ctx)
 				}
@@ -1357,17 +1364,28 @@ attemptLoop:
 
 					chunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, translated, bytes.Clone(payload), &param)
 					for i := range chunks {
-						out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}
+						select {
+						case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:
+						case <-ctx.Done():
+							return
+						}
 					}
 				}
 				tail := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, translated, []byte("[DONE]"), &param)
 				for i := range tail {
-					out <- cliproxyexecutor.StreamChunk{Payload: tail[i]}
+					select {
+					case out <- cliproxyexecutor.StreamChunk{Payload: tail[i]}:
+					case <-ctx.Done():
+						return
+					}
 				}
 				if errScan := scanner.Err(); errScan != nil {
 					helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 					reporter.PublishFailure(ctx)
-					out <- cliproxyexecutor.StreamChunk{Err: errScan}
+					select {
+					case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+					case <-ctx.Done():
+					}
 				} else {
 					reporter.EnsurePublished(ctx)
 				}
diff --git a/internal/runtime/executor/claude_executor.go b/internal/runtime/executor/claude_executor.go
index 66432ac4..ea94526e 100644
--- a/internal/runtime/executor/claude_executor.go
+++ b/internal/runtime/executor/claude_executor.go
@@ -484,12 +484,19 @@ func (e *ClaudeExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.A
 				cloned := make([]byte, len(line)+1)
 				copy(cloned, line)
 				cloned[len(line)] = '\n'
-				out <- cliproxyexecutor.StreamChunk{Payload: cloned}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: cloned}:
+				case <-ctx.Done():
+					return
+				}
 			}
 			if errScan := scanner.Err(); errScan != nil {
 				helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 				reporter.PublishFailure(ctx)
-				out <- cliproxyexecutor.StreamChunk{Err: errScan}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+				case <-ctx.Done():
+				}
 			}
 			return
 		}
@@ -521,13 +528,20 @@ func (e *ClaudeExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.A
 				&param,
 			)
 			for i := range chunks {
-				out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		if errScan := scanner.Err(); errScan != nil {
 			helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 			reporter.PublishFailure(ctx)
-			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+			case <-ctx.Done():
+			}
 		}
 	}()
 	return &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}, nil
diff --git a/internal/runtime/executor/codex_executor.go b/internal/runtime/executor/codex_executor.go
index aa8223f4..6efc25b0 100644
--- a/internal/runtime/executor/codex_executor.go
+++ b/internal/runtime/executor/codex_executor.go
@@ -515,13 +515,20 @@ func (e *CodexExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Au
 
 			chunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, originalPayload, body, translatedLine, &param)
 			for i := range chunks {
-				out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		if errScan := scanner.Err(); errScan != nil {
 			helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 			reporter.PublishFailure(ctx)
-			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+			case <-ctx.Done():
+			}
 		}
 	}()
 	return &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}, nil
diff --git a/internal/runtime/executor/gemini_cli_executor.go b/internal/runtime/executor/gemini_cli_executor.go
index 15e84572..b6210e6a 100644
--- a/internal/runtime/executor/gemini_cli_executor.go
+++ b/internal/runtime/executor/gemini_cli_executor.go
@@ -411,19 +411,30 @@ func (e *GeminiCLIExecutor) ExecuteStream(ctx context.Context, auth *cliproxyaut
 					if bytes.HasPrefix(line, dataTag) {
 						segments := sdktranslator.TranslateStream(respCtx, to, from, attemptModel, opts.OriginalRequest, reqBody, bytes.Clone(line), &param)
 						for i := range segments {
-							out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}
+							select {
+							case out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}:
+							case <-ctx.Done():
+								return
+							}
 						}
 					}
 				}
 
 				segments := sdktranslator.TranslateStream(respCtx, to, from, attemptModel, opts.OriginalRequest, reqBody, []byte("[DONE]"), &param)
 				for i := range segments {
-					out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}
+					select {
+					case out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}:
+					case <-ctx.Done():
+						return
+					}
 				}
 				if errScan := scanner.Err(); errScan != nil {
 					helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 					reporter.PublishFailure(ctx)
-					out <- cliproxyexecutor.StreamChunk{Err: errScan}
+					select {
+					case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+					case <-ctx.Done():
+					}
 					return
 				}
 				reporter.EnsurePublished(ctx)
@@ -434,7 +445,10 @@ func (e *GeminiCLIExecutor) ExecuteStream(ctx context.Context, auth *cliproxyaut
 			if errRead != nil {
 				helps.RecordAPIResponseError(ctx, e.cfg, errRead)
 				reporter.PublishFailure(ctx)
-				out <- cliproxyexecutor.StreamChunk{Err: errRead}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Err: errRead}:
+				case <-ctx.Done():
+				}
 				return
 			}
 			helps.AppendAPIResponseChunk(ctx, e.cfg, data)
@@ -442,12 +456,20 @@ func (e *GeminiCLIExecutor) ExecuteStream(ctx context.Context, auth *cliproxyaut
 			var param any
 			segments := sdktranslator.TranslateStream(respCtx, to, from, attemptModel, opts.OriginalRequest, reqBody, data, &param)
 			for i := range segments {
-				out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 
 			segments = sdktranslator.TranslateStream(respCtx, to, from, attemptModel, opts.OriginalRequest, reqBody, []byte("[DONE]"), &param)
 			for i := range segments {
-				out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: segments[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}(httpResp, append([]byte(nil), payload...), attemptModel)
 
diff --git a/internal/runtime/executor/gemini_executor.go b/internal/runtime/executor/gemini_executor.go
index 0e3c3ec6..2a6e9a6e 100644
--- a/internal/runtime/executor/gemini_executor.go
+++ b/internal/runtime/executor/gemini_executor.go
@@ -324,17 +324,28 @@ func (e *GeminiExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.A
 			}
 			lines := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, bytes.Clone(payload), &param)
 			for i := range lines {
-				out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		lines := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, []byte("[DONE]"), &param)
 		for i := range lines {
-			out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}:
+			case <-ctx.Done():
+				return
+			}
 		}
 		if errScan := scanner.Err(); errScan != nil {
 			helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 			reporter.PublishFailure(ctx)
-			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+			case <-ctx.Done():
+			}
 		}
 	}()
 	return &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}, nil
diff --git a/internal/runtime/executor/gemini_vertex_executor.go b/internal/runtime/executor/gemini_vertex_executor.go
index b147fde9..20f5aec1 100644
--- a/internal/runtime/executor/gemini_vertex_executor.go
+++ b/internal/runtime/executor/gemini_vertex_executor.go
@@ -656,17 +656,28 @@ func (e *GeminiVertexExecutor) executeStreamWithServiceAccount(ctx context.Conte
 			}
 			lines := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, bytes.Clone(line), &param)
 			for i := range lines {
-				out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		lines := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, []byte("[DONE]"), &param)
 		for i := range lines {
-			out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}:
+			case <-ctx.Done():
+				return
+			}
 		}
 		if errScan := scanner.Err(); errScan != nil {
 			helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 			reporter.PublishFailure(ctx)
-			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+			case <-ctx.Done():
+			}
 		}
 	}()
 	return &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}, nil
@@ -786,17 +797,28 @@ func (e *GeminiVertexExecutor) executeStreamWithAPIKey(ctx context.Context, auth
 			}
 			lines := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, bytes.Clone(line), &param)
 			for i := range lines {
-				out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		lines := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, []byte("[DONE]"), &param)
 		for i := range lines {
-			out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Payload: lines[i]}:
+			case <-ctx.Done():
+				return
+			}
 		}
 		if errScan := scanner.Err(); errScan != nil {
 			helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 			reporter.PublishFailure(ctx)
-			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+			case <-ctx.Done():
+			}
 		}
 	}()
 	return &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}, nil
diff --git a/internal/runtime/executor/kimi_executor.go b/internal/runtime/executor/kimi_executor.go
index 3588c962..2bb0c7fd 100644
--- a/internal/runtime/executor/kimi_executor.go
+++ b/internal/runtime/executor/kimi_executor.go
@@ -290,17 +290,28 @@ func (e *KimiExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Aut
 			}
 			chunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, bytes.Clone(line), &param)
 			for i := range chunks {
-				out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		doneChunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, body, []byte("[DONE]"), &param)
 		for i := range doneChunks {
-			out <- cliproxyexecutor.StreamChunk{Payload: doneChunks[i]}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Payload: doneChunks[i]}:
+			case <-ctx.Done():
+				return
+			}
 		}
 		if errScan := scanner.Err(); errScan != nil {
 			helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 			reporter.PublishFailure(ctx)
-			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+			case <-ctx.Done():
+			}
 		}
 	}()
 	return &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}, nil
diff --git a/internal/runtime/executor/openai_compat_executor.go b/internal/runtime/executor/openai_compat_executor.go
index 4e44a7ae..ebddfddb 100644
--- a/internal/runtime/executor/openai_compat_executor.go
+++ b/internal/runtime/executor/openai_compat_executor.go
@@ -293,20 +293,31 @@ func (e *OpenAICompatExecutor) ExecuteStream(ctx context.Context, auth *cliproxy
 			// Pass through translator; it yields one or more chunks for the target schema.
 			chunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, translated, bytes.Clone(line), &param)
 			for i := range chunks {
-				out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		if errScan := scanner.Err(); errScan != nil {
 			helps.RecordAPIResponseError(ctx, e.cfg, errScan)
 			reporter.PublishFailure(ctx)
-			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+			select {
+			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:
+			case <-ctx.Done():
+			}
 		} else {
 			// In case the upstream close the stream without a terminal [DONE] marker.
 			// Feed a synthetic done marker through the translator so pending
 			// response.completed events are still emitted exactly once.
 			chunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, opts.OriginalRequest, translated, []byte("data: [DONE]"), &param)
 			for i := range chunks {
-				out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}
+				select {
+				case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:
+				case <-ctx.Done():
+					return
+				}
 			}
 		}
 		// Ensure we record the request if no usage chunk was ever seen