feat(ai): support DeepSeek reasoning effort and preserve empty reasoning replay

BitFun-Installer/src/data/modelProviders.ts

@@ -99,7 +99,7 @@ export const PROVIDER_TEMPLATES: Record<string, ProviderTemplate> = {
     descriptionKey: 'model.providers.deepseek.description',
     baseUrl: 'https://api.deepseek.com/v1',
     format: 'openai',
-    models: ['deepseek-chat', 'deepseek-reasoner'],
+    models: ['deepseek-v4-flash', 'deepseek-v4-pro'],
     helpUrl: 'https://platform.deepseek.com/api_keys',
   },
   zhipu: {

BitFun-Installer/src/i18n/locales/en.json

@@ -51,7 +51,7 @@
     "installDone": "Installation complete",
     "provider": "Provider",
     "config": "Connection",
-    "modelName": "Model name (e.g. deepseek-chat)",
+    "modelName": "Model name (e.g. deepseek-v4-flash)",
     "apiKey": "API key",
     "back": "Back",
     "skip": "Skip for now",

BitFun-Installer/src/i18n/locales/zh-TW.json

@@ -51,7 +51,7 @@
     "installDone": "安裝完成",
     "provider": "服務商",
     "config": "連接信息",
-    "modelName": "模型名稱（如 deepseek-chat）",
+    "modelName": "模型名稱（如 deepseek-v4-flash）",
     "apiKey": "API Key",
     "back": "返回",
     "skip": "稍後配置",

BitFun-Installer/src/i18n/locales/zh.json

@@ -51,7 +51,7 @@
     "installDone": "安装完成",
     "provider": "服务商",
     "config": "连接信息",
-    "modelName": "模型名称（如 deepseek-chat）",
+    "modelName": "模型名称（如 deepseek-v4-flash）",
     "apiKey": "API Key",
     "back": "返回",
     "skip": "稍后配置",

src/crates/ai-adapters/src/client.rs

@@ -422,9 +422,82 @@ mod tests {
 
         assert_eq!(request_body["thinking"]["type"], "enabled");
         assert!(request_body.get("enable_thinking").is_none());
+        assert!(request_body.get("reasoning_effort").is_none());
         assert!(request_body.get("reasoning_split").is_none());
     }
 
+    #[test]
+    fn build_openai_request_body_adds_deepseek_reasoning_effort() {
+        let client = AIClient::new(AIConfig {
+            name: "deepseek".to_string(),
+            base_url: "https://api.deepseek.com/v1".to_string(),
+            request_url: "https://api.deepseek.com/v1/chat/completions".to_string(),
+            api_key: "test-key".to_string(),
+            model: "deepseek-v4-pro".to_string(),
+            format: "openai".to_string(),
+            context_window: 128000,
+            max_tokens: Some(4096),
+            temperature: None,
+            top_p: None,
+            reasoning_mode: ReasoningMode::Enabled,
+            inline_think_in_text: false,
+            custom_headers: None,
+            custom_headers_mode: None,
+            skip_ssl_verify: false,
+            reasoning_effort: Some("xhigh".to_string()),
+            thinking_budget_tokens: None,
+            custom_request_body: None,
+            custom_request_body_mode: None,
+        });
+
+        let request_body = openai::chat::build_request_body(
+            &client,
+            &client.config.request_url,
+            vec![json!({ "role": "user", "content": "hello" })],
+            None,
+            None,
+        );
+
+        assert_eq!(request_body["thinking"]["type"], "enabled");
+        assert_eq!(request_body["reasoning_effort"], "max");
+    }
+
+    #[test]
+    fn build_openai_request_body_omits_deepseek_reasoning_effort_when_disabled() {
+        let client = AIClient::new(AIConfig {
+            name: "deepseek".to_string(),
+            base_url: "https://api.deepseek.com/v1".to_string(),
+            request_url: "https://api.deepseek.com/v1/chat/completions".to_string(),
+            api_key: "test-key".to_string(),
+            model: "deepseek-v4-flash".to_string(),
+            format: "openai".to_string(),
+            context_window: 128000,
+            max_tokens: Some(4096),
+            temperature: None,
+            top_p: None,
+            reasoning_mode: ReasoningMode::Disabled,
+            inline_think_in_text: false,
+            custom_headers: None,
+            custom_headers_mode: None,
+            skip_ssl_verify: false,
+            reasoning_effort: Some("max".to_string()),
+            thinking_budget_tokens: None,
+            custom_request_body: None,
+            custom_request_body_mode: None,
+        });
+
+        let request_body = openai::chat::build_request_body(
+            &client,
+            &client.config.request_url,
+            vec![json!({ "role": "user", "content": "hello" })],
+            None,
+            None,
+        );
+
+        assert_eq!(request_body["thinking"]["type"], "disabled");
+        assert!(request_body.get("reasoning_effort").is_none());
+    }
+
     #[test]
     fn build_openai_request_body_uses_enable_thinking_for_siliconflow() {
         let client = AIClient::new(AIConfig {
@@ -536,10 +609,52 @@ mod tests {
         assert_eq!(request_body["output_config"]["effort"], "high");
     }
 
+    #[test]
+    fn build_anthropic_request_body_adds_deepseek_reasoning_effort() {
+        let client = AIClient::new(AIConfig {
+            name: "deepseek".to_string(),
+            base_url: "https://api.deepseek.com/anthropic".to_string(),
+            request_url: "https://api.deepseek.com/anthropic/v1/messages".to_string(),
+            api_key: "test-key".to_string(),
+            model: "deepseek-v4-pro".to_string(),
+            format: "anthropic".to_string(),
+            context_window: 200000,
+            max_tokens: Some(8192),
+            temperature: None,
+            top_p: None,
+            reasoning_mode: ReasoningMode::Enabled,
+            inline_think_in_text: false,
+            custom_headers: None,
+            custom_headers_mode: None,
+            skip_ssl_verify: false,
+            reasoning_effort: Some("xhigh".to_string()),
+            thinking_budget_tokens: None,
+            custom_request_body: None,
+            custom_request_body_mode: None,
+        });
+
+        let request_body = anthropic::request::build_request_body(
+            &client,
+            &client.config.request_url,
+            None,
+            vec![json!({ "role": "user", "content": [{ "type": "text", "text": "hello" }] })],
+            None,
+            None,
+        );
+
+        assert_eq!(request_body["thinking"]["type"], "enabled");
+        assert_eq!(request_body["output_config"]["effort"], "max");
+    }
+
     #[test]
     fn build_openai_request_body_trim_mode_preserves_essential_fields() {
         let mut client = make_trim_test_client("openai");
+        client.config.base_url = "https://api.deepseek.com/v1".to_string();
+        client.config.request_url = "https://api.deepseek.com/v1/chat/completions".to_string();
+        client.config.model = "deepseek-v4-pro".to_string();
         client.config.max_tokens = Some(8192);
+        client.config.reasoning_mode = ReasoningMode::Enabled;
+        client.config.reasoning_effort = Some("high".to_string());
         let messages = vec![json!({ "role": "user", "content": "hello" })];
 
         let request_body = openai::chat::build_request_body(
@@ -557,13 +672,14 @@ mod tests {
             })),
         );
 
-        assert_eq!(request_body["model"], "test-model");
+        assert_eq!(request_body["model"], "deepseek-v4-pro");
         assert_eq!(request_body["messages"], json!(messages));
         assert_eq!(request_body["stream"], true);
         assert_eq!(request_body["max_tokens"], 8192);
         assert_eq!(request_body["temperature"], 0.7);
         assert_eq!(request_body["response_format"]["type"], "json_object");
         assert!(request_body.get("thinking").is_none());
+        assert!(request_body.get("reasoning_effort").is_none());
     }
 
     #[test]

src/crates/ai-adapters/src/client/quirks.rs

@@ -8,6 +8,29 @@ pub(crate) fn is_siliconflow_url(url: &str) -> bool {
     url.contains("api.siliconflow.cn")
 }
 
+pub(crate) fn is_deepseek_url(url: &str) -> bool {
+    url.contains("api.deepseek.com")
+}
+
+pub(crate) fn is_deepseek_reasoning_effort_model(model_name: &str) -> bool {
+    matches!(
+        model_name.trim().to_ascii_lowercase().as_str(),
+        "deepseek-v4-flash" | "deepseek-v4-pro"
+    )
+}
+
+pub(crate) fn normalize_deepseek_reasoning_effort(effort: &str) -> Option<&'static str> {
+    match effort.trim().to_ascii_lowercase().as_str() {
+        "" => None,
+        "high" => Some("high"),
+        "max" => Some("max"),
+        "low" | "medium" => Some("high"),
+        "xhigh" => Some("max"),
+        "none" | "minimal" => None,
+        _ => Some("high"),
+    }
+}
+
 pub(crate) fn parse_glm_major_minor(model_name: &str) -> Option<(u32, u32)> {
     let lower = model_name.to_ascii_lowercase();
     let tail = lower.strip_prefix("glm-")?;
@@ -40,7 +63,9 @@ pub(crate) fn should_append_tool_stream(url: &str, model_name: &str) -> bool {
 pub(crate) fn apply_openai_compatible_reasoning_fields(
     request_body: &mut serde_json::Value,
     mode: ReasoningMode,
+    reasoning_effort: Option<&str>,
     url: &str,
+    model_name: &str,
 ) {
     let normalized_mode = if mode == ReasoningMode::Adaptive {
         ReasoningMode::Enabled
@@ -66,4 +91,16 @@ pub(crate) fn apply_openai_compatible_reasoning_fields(
         }
         ReasoningMode::Adaptive => unreachable!("adaptive mode is normalized above"),
     }
+
+    if normalized_mode == ReasoningMode::Disabled {
+        return;
+    }
+
+    if !(is_deepseek_url(url) || is_deepseek_reasoning_effort_model(model_name)) {
+        return;
+    }
+
+    if let Some(effort) = reasoning_effort.and_then(normalize_deepseek_reasoning_effort) {
+        request_body["reasoning_effort"] = serde_json::json!(effort);
+    }
 }

src/crates/ai-adapters/src/providers/anthropic/message_converter.rs

@@ -129,18 +129,15 @@ impl AnthropicMessageConverter {
     fn convert_assistant_message(msg: Message) -> Option<Value> {
         let mut content = Vec::new();
 
-        if let Some(thinking) = msg.reasoning_content.as_ref() {
-            if !thinking.is_empty() {
-                let mut thinking_block = json!({
-                    "type": "thinking",
-                    "thinking": thinking
-                });
+        if msg.reasoning_content.is_some() || msg.thinking_signature.is_some() {
+            let mut thinking_block = json!({
+                "type": "thinking",
+                "thinking": msg.reasoning_content.as_deref().unwrap_or("")
+            });
 
-                thinking_block["signature"] =
-                    json!(msg.thinking_signature.as_deref().unwrap_or(""));
+            thinking_block["signature"] = json!(msg.thinking_signature.as_deref().unwrap_or(""));
 
-                content.push(thinking_block);
-            }
+            content.push(thinking_block);
         }
 
         if let Some(text) = msg.content {
@@ -230,3 +227,34 @@ impl AnthropicMessageConverter {
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::AnthropicMessageConverter;
+    use crate::types::Message;
+    use serde_json::json;
+
+    #[test]
+    fn preserves_empty_thinking_block_when_signature_exists() {
+        let msg = Message {
+            role: "assistant".to_string(),
+            content: Some("Answer".to_string()),
+            reasoning_content: Some(String::new()),
+            thinking_signature: Some("sig_1".to_string()),
+            tool_calls: None,
+            tool_call_id: None,
+            name: None,
+            is_error: None,
+            tool_image_attachments: None,
+        };
+
+        let (_, messages) = AnthropicMessageConverter::convert_messages(vec![msg]);
+        let content = messages[0]["content"]
+            .as_array()
+            .expect("assistant content");
+
+        assert_eq!(content[0]["type"], json!("thinking"));
+        assert_eq!(content[0]["thinking"], json!(""));
+        assert_eq!(content[0]["signature"], json!("sig_1"));
+    }
+}

src/crates/ai-adapters/src/providers/anthropic/request.rs

@@ -1,5 +1,8 @@
 use super::AnthropicMessageConverter;
-use crate::client::quirks::should_append_tool_stream;
+use crate::client::quirks::{
+    is_deepseek_reasoning_effort_model, is_deepseek_url, normalize_deepseek_reasoning_effort,
+    should_append_tool_stream,
+};
 use crate::client::sse::execute_sse_request;
 use crate::client::{AIClient, StreamResponse};
 use crate::providers::shared;
@@ -54,13 +57,26 @@ fn default_anthropic_budget_tokens(max_tokens: Option<u32>) -> Option<u32> {
 fn apply_reasoning_fields(
     request_body: &mut serde_json::Value,
     mode: ReasoningMode,
+    url: &str,
     model_name: &str,
     max_tokens: Option<u32>,
     reasoning_effort: Option<&str>,
     thinking_budget_tokens: Option<u32>,
 ) {
+    let is_deepseek_reasoning_target =
+        is_deepseek_url(url) || is_deepseek_reasoning_effort_model(model_name);
+
     match mode {
-        ReasoningMode::Default => {}
+        ReasoningMode::Default => {
+            if is_deepseek_reasoning_target {
+                if let Some(effort) = reasoning_effort.and_then(normalize_deepseek_reasoning_effort)
+                {
+                    request_body["output_config"] = serde_json::json!({
+                        "effort": effort
+                    });
+                }
+            }
+        }
         ReasoningMode::Disabled => {
             request_body["thinking"] = serde_json::json!({ "type": "disabled" });
         }
@@ -74,6 +90,14 @@ fn apply_reasoning_fields(
                 }
             }
             request_body["thinking"] = thinking;
+            if is_deepseek_reasoning_target {
+                if let Some(effort) = reasoning_effort.and_then(normalize_deepseek_reasoning_effort)
+                {
+                    request_body["output_config"] = serde_json::json!({
+                        "effort": effort
+                    });
+                }
+            }
         }
         ReasoningMode::Adaptive => {
             if anthropic_supports_adaptive_reasoning(model_name) {
@@ -92,6 +116,7 @@ fn apply_reasoning_fields(
                 apply_reasoning_fields(
                     request_body,
                     ReasoningMode::Enabled,
+                    url,
                     model_name,
                     max_tokens,
                     None,
@@ -138,6 +163,7 @@ pub(crate) fn build_request_body(
     apply_reasoning_fields(
         &mut request_body,
         client.config.reasoning_mode,
+        url,
         &model_name,
         Some(max_tokens),
         client.config.reasoning_effort.as_deref(),

src/crates/ai-adapters/src/providers/openai/common.rs

@@ -36,7 +36,13 @@ pub(crate) fn apply_reasoning_fields(
     client: &AIClient,
     url: &str,
 ) {
-    apply_openai_compatible_reasoning_fields(request_body, client.config.reasoning_mode, url);
+    apply_openai_compatible_reasoning_fields(
+        request_body,
+        client.config.reasoning_mode,
+        client.config.reasoning_effort.as_deref(),
+        url,
+        &client.config.model,
+    );
 }
 
 pub(crate) fn resolve_models_url(client: &AIClient) -> String {