增加不同上下文模式

internal/httpapi/openai/chat/test_helpers_test.go

@@ -23,6 +23,7 @@ type mockOpenAIConfig struct {
 	currentInputEnabled bool
 	currentInputMin     int
 	thinkingInjection   *bool
+	thinkingPrompt      string
 }
 
 func (m mockOpenAIConfig) ModelAliases() map[string]string { return m.aliases }
@@ -58,6 +59,7 @@ func (m mockOpenAIConfig) ThinkingInjectionEnabled() bool {
 	}
 	return *m.thinkingInjection
 }
+func (m mockOpenAIConfig) ThinkingInjectionPrompt() string { return m.thinkingPrompt }
 
 type streamStatusAuthStub struct{}
 

internal/httpapi/openai/deps_injection_test.go

@@ -19,6 +19,7 @@ type mockOpenAIConfig struct {
 	currentInputEnabled bool
 	currentInputMin     int
 	thinkingInjection   *bool
+	thinkingPrompt      string
 }
 
 func (m mockOpenAIConfig) ModelAliases() map[string]string { return m.aliases }
@@ -54,6 +55,7 @@ func (m mockOpenAIConfig) ThinkingInjectionEnabled() bool {
 	}
 	return *m.thinkingInjection
 }
+func (m mockOpenAIConfig) ThinkingInjectionPrompt() string { return m.thinkingPrompt }
 
 func TestNormalizeOpenAIChatRequestWithConfigInterface(t *testing.T) {
 	cfg := mockOpenAIConfig{

internal/httpapi/openai/history_split_test.go

@@ -183,6 +183,36 @@ func TestApplyThinkingInjectionAppendsLatestUserPrompt(t *testing.T) {
 	}
 }
 
+func TestApplyThinkingInjectionUsesCustomPrompt(t *testing.T) {
+	ds := &inlineUploadDSStub{}
+	h := &openAITestSurface{
+		Store: mockOpenAIConfig{
+			wideInput:         true,
+			thinkingInjection: boolPtr(true),
+			thinkingPrompt:    "custom thinking format",
+		},
+		DS: ds,
+	}
+	req := map[string]any{
+		"model": "deepseek-v4-flash",
+		"messages": []any{
+			map[string]any{"role": "user", "content": "hello"},
+		},
+	}
+	stdReq, err := promptcompat.NormalizeOpenAIChatRequest(h.Store, req, "")
+	if err != nil {
+		t.Fatalf("normalize failed: %v", err)
+	}
+
+	out, err := h.applyHistorySplit(context.Background(), &auth.RequestAuth{DeepSeekToken: "token"}, stdReq)
+	if err != nil {
+		t.Fatalf("apply thinking injection failed: %v", err)
+	}
+	if !strings.Contains(out.FinalPrompt, "hello\n\ncustom thinking format") {
+		t.Fatalf("expected custom thinking injection after latest user message, got %s", out.FinalPrompt)
+	}
+}
+
 func TestApplyHistorySplitDirectPassThroughWhenBothSplitsDisabled(t *testing.T) {
 	ds := &inlineUploadDSStub{}
 	h := &openAITestSurface{

internal/httpapi/openai/shared/deps.go

@@ -48,6 +48,7 @@ type ConfigReader interface {
 	CurrentInputFileEnabled() bool
 	CurrentInputFileMinChars() int
 	ThinkingInjectionEnabled() bool
+	ThinkingInjectionPrompt() string
 }
 
 type Deps struct {

internal/httpapi/openai/shared/thinking_injection.go

@@ -6,7 +6,7 @@ func ApplyThinkingInjection(store ConfigReader, stdReq promptcompat.StandardRequ
 	if store == nil || !store.ThinkingInjectionEnabled() || !stdReq.Thinking {
 		return stdReq
 	}
-	messages, changed := promptcompat.AppendThinkingInjectionToLatestUser(stdReq.Messages)
+	messages, changed := promptcompat.AppendThinkingInjectionPromptToLatestUser(stdReq.Messages, store.ThinkingInjectionPrompt())
 	if !changed {
 		return stdReq
 	}