feat(gemini-web): Replace code-mode with flexible gem-mode

README.md

@@ -328,7 +328,7 @@ The server uses a YAML configuration file (`config.yaml`) located in the project
 | `openai-compatibility.*.models.*.alias`            | string   | ""                 | The alias used in the API.                                                                                                                                                                |
 | `gemini-web`                            | object   | {}                 | Configuration specific to the Gemini Web client.                                                                                                                                          |
 | `gemini-web.context`                    | boolean  | true               | Enables conversation context reuse for continuous dialogue.                                                                                                                               |
-| `gemini-web.code-mode`                  | boolean  | false              | Enables code mode for optimized responses in coding-related tasks.                                                                                                                        |
+| `gemini-web.gem-mode`                   | string   | ""                | Selects a predefined Gem to attach for Gemini Web requests; allowed values: `coding-partner`, `writing-editor`. When empty, no Gem is attached.                                           |
 | `gemini-web.max-chars-per-request`      | integer  | 1,000,000          | The maximum number of characters to send to Gemini Web in a single request.                                                                                                               |
 | `gemini-web.disable-continuation-hint`  | boolean  | false              | Disables the continuation hint for split prompts.                                                                                                                                         |
 
@@ -378,7 +378,7 @@ quota-exceeded:
 # Gemini Web client configuration
 gemini-web:
   context: true # Enable conversation context reuse
-  code-mode: false # Enable code mode
+  gem-mode: "" # Select Gem: "coding-partner" or "writing-editor"; empty means no Gem
   max-chars-per-request: 1000000 # Max characters per request
 
 # API keys for official Generative Language API

README_CN.md

@@ -340,7 +340,7 @@ console.log(await claudeResponse.json());
 | `openai-compatibility.*.models.*.alias`               | string   | ""                 | 在API中使用的别名。                                                         |
 | `gemini-web`                            | object   | {}                 | Gemini Web 客户端的特定配置。                                                 |
 | `gemini-web.context`                    | boolean  | true               | 是否启用会话上下文重用，以实现连续对话。                                        |
-| `gemini-web.code-mode`                  | boolean  | false              | 是否启用代码模式，优化代码相关任务的响应。                                      |
+| `gemini-web.gem-mode`                   | string   | ""                | 选择要附加的预设 Gem（`coding-partner` 或 `writing-editor`）；为空表示不附加。 |
 | `gemini-web.max-chars-per-request`      | integer  | 1,000,000          | 单次请求发送给 Gemini Web 的最大字符数。                                        |
 | `gemini-web.disable-continuation-hint`  | boolean  | false              | 当提示被拆分时，是否禁用连续提示的暗示。                                        |
 
@@ -390,7 +390,7 @@ quota-exceeded:
 # Gemini Web 客户端配置
 gemini-web:
   context: true # 启用会话上下文重用
-  code-mode: false # 启用代码模式
+  gem-mode: "" # 选择 Gem："coding-partner" 或 "writing-editor"；为空表示不附加
   max-chars-per-request: 1000000 # 单次请求最大字符数
 
 # AIStduio Gemini API 的 API 密钥

config.example.yaml

@@ -90,10 +90,8 @@ quota-exceeded:
 #    # Disable the short continuation hint appended to intermediate chunks
 #    # when splitting long prompts. Default is false (hint enabled by default).
 #    disable-continuation-hint: false
-#    # Code mode:
+#    # Gem selection (Gem Mode):
-#    #   - true: enable XML wrapping hint and attach the coding-partner Gem.
+#    #   - "coding-partner": attach the predefined Coding partner Gem
-#    #           Thought merging (<think> into visible content) applies to STREAMING only;
+#    #   - "writing-editor": attach the predefined Writing editor Gem
-#    #           non-stream responses keep reasoning/thought parts separate for clients
+#    #   - empty: do not attach any Gem
-#    #           that expect explicit reasoning fields.
+#    gem-mode: ""
-#    #   - false: disable XML hint and keep <think> separate
-#    code-mode: false

internal/config/config.go

@@ -62,10 +62,19 @@ type GeminiWebConfig struct {
 	// Defaults to true if not set in YAML (see LoadConfig).
 	Context bool `yaml:"context" json:"context"`
 
-	// CodeMode, when true, enables coding mode behaviors for Gemini Web:
+	// GemMode selects a predefined Gem to attach for Gemini Web requests.
-	// - Attach the predefined "Coding partner" Gem
+	// Allowed values:
-	// - Enable XML wrapping hint for tool markup
+	// - "coding-partner"
-	// - Merge <think> content into visible content for tool-friendly output
+	// - "writing-editor"
+	// When empty, no Gem is attached by configuration.
+	// This is independent from CodeMode below, which is kept for backwards compatibility.
+	GemMode string `yaml:"gem-mode" json:"gem-mode"`
+
+	// CodeMode enables legacy coding-mode behaviors for Gemini Web.
+	// Backwards compatibility: when true, the service behaves as before by
+	// attaching the predefined "Coding partner" Gem and enabling extra
+	// conveniences (e.g., XML wrapping hints). Prefer GemMode for selecting
+	// a Gem going forward.
 	CodeMode bool `yaml:"code-mode" json:"code-mode"`
 
 	// MaxCharsPerRequest caps the number of characters (runes) sent to

internal/provider/gemini-web/state.go

@@ -696,7 +696,22 @@ func (s *GeminiWebState) findReusableSession(modelName string, msgs []RoleText)
 }
 
 func (s *GeminiWebState) getConfiguredGem() *Gem {
-	if s.cfg != nil && s.cfg.GeminiWeb.CodeMode {
+	if s.cfg == nil {
+		return nil
+	}
+	// New behavior: attach Gem based on explicit GemMode selection.
+	// Only attaches the Gem; does not toggle any other behavior.
+	if gm := strings.ToLower(strings.TrimSpace(s.cfg.GeminiWeb.GemMode)); gm != "" {
+		switch gm {
+		case "coding-partner":
+			return &Gem{ID: "coding-partner", Name: "Coding partner", Predefined: true}
+		case "writing-editor":
+			return &Gem{ID: "writing-editor", Name: "Writing editor", Predefined: true}
+		}
+	}
+	// Backwards compatibility: legacy CodeMode still attaches Coding partner
+	// and may enable extra behaviors elsewhere.
+	if s.cfg.GeminiWeb.CodeMode {
 		return &Gem{ID: "coding-partner", Name: "Coding partner", Predefined: true}
 	}
 	return nil

internal/watcher/watcher.go

@@ -521,6 +521,9 @@ func (w *Watcher) reloadConfig() bool {
 		if oldConfig.GeminiWeb.DisableContinuationHint != newConfig.GeminiWeb.DisableContinuationHint {
 			log.Debugf("  gemini-web.disable-continuation-hint: %t -> %t", oldConfig.GeminiWeb.DisableContinuationHint, newConfig.GeminiWeb.DisableContinuationHint)
 		}
+		if oldConfig.GeminiWeb.GemMode != newConfig.GeminiWeb.GemMode {
+			log.Debugf("  gemini-web.gem-mode: %s -> %s", oldConfig.GeminiWeb.GemMode, newConfig.GeminiWeb.GemMode)
+		}
 		if oldConfig.GeminiWeb.CodeMode != newConfig.GeminiWeb.CodeMode {
 			log.Debugf("  gemini-web.code-mode: %t -> %t", oldConfig.GeminiWeb.CodeMode, newConfig.GeminiWeb.CodeMode)
 		}