Add provider field support for explicit provider selection

- Add Provider field to AgentDefaults struct
- Modify CreateProvider to use explicit provider field first, fallback to model name detection
- Allows using models without provider prefix (e.g., llama-3.1-8b-instant instead of groq/llama-3.1-8b-instant)
- Supports all providers: groq, openai, anthropic, openrouter, zhipu, gemini, vllm
- Backward compatible with existing configs

Fixes issue where models without provider prefix could not use configured API keys.

pkg/config/config.go

@@ -24,6 +24,7 @@ type AgentsConfig struct {
 
 type AgentDefaults struct {
 	Workspace         string  `json:"workspace" env:"PICOCLAW_AGENTS_DEFAULTS_WORKSPACE"`
+	Provider          string  `json:"provider" env:"PICOCLAW_AGENTS_DEFAULTS_PROVIDER"`
 	Model             string  `json:"model" env:"PICOCLAW_AGENTS_DEFAULTS_MODEL"`
 	MaxTokens         int     `json:"max_tokens" env:"PICOCLAW_AGENTS_DEFAULTS_MAX_TOKENS"`
 	Temperature       float64 `json:"temperature" env:"PICOCLAW_AGENTS_DEFAULTS_TEMPERATURE"`
@@ -82,10 +83,10 @@ type QQConfig struct {
 }
 
 type DingTalkConfig struct {
-	Enabled          bool     `json:"enabled" env:"PICOCLAW_CHANNELS_DINGTALK_ENABLED"`
+	Enabled      bool     `json:"enabled" env:"PICOCLAW_CHANNELS_DINGTALK_ENABLED"`
-	ClientID         string   `json:"client_id" env:"PICOCLAW_CHANNELS_DINGTALK_CLIENT_ID"`
+	ClientID     string   `json:"client_id" env:"PICOCLAW_CHANNELS_DINGTALK_CLIENT_ID"`
-	ClientSecret     string   `json:"client_secret" env:"PICOCLAW_CHANNELS_DINGTALK_CLIENT_SECRET"`
+	ClientSecret string   `json:"client_secret" env:"PICOCLAW_CHANNELS_DINGTALK_CLIENT_SECRET"`
-	AllowFrom        []string `json:"allow_from" env:"PICOCLAW_CHANNELS_DINGTALK_ALLOW_FROM"`
+	AllowFrom    []string `json:"allow_from" env:"PICOCLAW_CHANNELS_DINGTALK_ALLOW_FROM"`
 }
 
 type ProvidersConfig struct {
@@ -127,6 +128,7 @@ func DefaultConfig() *Config {
 		Agents: AgentsConfig{
 			Defaults: AgentDefaults{
 				Workspace:         "~/.picoclaw/workspace",
+				Provider:          "",
 				Model:             "glm-4.7",
 				MaxTokens:         8192,
 				Temperature:       0.7,

pkg/providers/http_provider.go

@@ -194,13 +194,81 @@ func createCodexAuthProvider() (LLMProvider, error) {
 
 func CreateProvider(cfg *config.Config) (LLMProvider, error) {
 	model := cfg.Agents.Defaults.Model
+	providerName := strings.ToLower(cfg.Agents.Defaults.Provider)
 
 	var apiKey, apiBase string
 
 	lowerModel := strings.ToLower(model)
 
-	switch {
+	// First, try to use explicitly configured provider
-	case strings.HasPrefix(model, "openrouter/") || strings.HasPrefix(model, "anthropic/") || strings.HasPrefix(model, "openai/") || strings.HasPrefix(model, "meta-llama/") || strings.HasPrefix(model, "deepseek/") || strings.HasPrefix(model, "google/"):
+	if providerName != "" {
+		switch providerName {
+		case "groq":
+			if cfg.Providers.Groq.APIKey != "" {
+				apiKey = cfg.Providers.Groq.APIKey
+				apiBase = cfg.Providers.Groq.APIBase
+				if apiBase == "" {
+					apiBase = "https://api.groq.com/openai/v1"
+				}
+			}
+		case "openai", "gpt":
+			if cfg.Providers.OpenAI.APIKey != "" || cfg.Providers.OpenAI.AuthMethod != "" {
+				if cfg.Providers.OpenAI.AuthMethod == "oauth" || cfg.Providers.OpenAI.AuthMethod == "token" {
+					return createCodexAuthProvider()
+				}
+				apiKey = cfg.Providers.OpenAI.APIKey
+				apiBase = cfg.Providers.OpenAI.APIBase
+				if apiBase == "" {
+					apiBase = "https://api.openai.com/v1"
+				}
+			}
+		case "anthropic", "claude":
+			if cfg.Providers.Anthropic.APIKey != "" || cfg.Providers.Anthropic.AuthMethod != "" {
+				if cfg.Providers.Anthropic.AuthMethod == "oauth" || cfg.Providers.Anthropic.AuthMethod == "token" {
+					return createClaudeAuthProvider()
+				}
+				apiKey = cfg.Providers.Anthropic.APIKey
+				apiBase = cfg.Providers.Anthropic.APIBase
+				if apiBase == "" {
+					apiBase = "https://api.anthropic.com/v1"
+				}
+			}
+		case "openrouter":
+			if cfg.Providers.OpenRouter.APIKey != "" {
+				apiKey = cfg.Providers.OpenRouter.APIKey
+				if cfg.Providers.OpenRouter.APIBase != "" {
+					apiBase = cfg.Providers.OpenRouter.APIBase
+				} else {
+					apiBase = "https://openrouter.ai/api/v1"
+				}
+			}
+		case "zhipu", "glm":
+			if cfg.Providers.Zhipu.APIKey != "" {
+				apiKey = cfg.Providers.Zhipu.APIKey
+				apiBase = cfg.Providers.Zhipu.APIBase
+				if apiBase == "" {
+					apiBase = "https://open.bigmodel.cn/api/paas/v4"
+				}
+			}
+		case "gemini", "google":
+			if cfg.Providers.Gemini.APIKey != "" {
+				apiKey = cfg.Providers.Gemini.APIKey
+				apiBase = cfg.Providers.Gemini.APIBase
+				if apiBase == "" {
+					apiBase = "https://generativelanguage.googleapis.com/v1beta"
+				}
+			}
+		case "vllm":
+			if cfg.Providers.VLLM.APIBase != "" {
+				apiKey = cfg.Providers.VLLM.APIKey
+				apiBase = cfg.Providers.VLLM.APIBase
+			}
+		}
+	}
+
+	// Fallback: detect provider from model name
+	if apiKey == "" && apiBase == "" {
+		switch {	case strings.HasPrefix(model, "openrouter/") || strings.HasPrefix(model, "anthropic/") || strings.HasPrefix(model, "openai/") || strings.HasPrefix(model, "meta-llama/") || strings.HasPrefix(model, "deepseek/") || strings.HasPrefix(model, "google/"):
 		apiKey = cfg.Providers.OpenRouter.APIKey
 		if cfg.Providers.OpenRouter.APIBase != "" {
 			apiBase = cfg.Providers.OpenRouter.APIBase
@@ -265,6 +333,7 @@ func CreateProvider(cfg *config.Config) (LLMProvider, error) {
 			return nil, fmt.Errorf("no API key configured for model: %s", model)
 		}
 	}
+	}
 
 	if apiKey == "" && !strings.HasPrefix(model, "bedrock/") {
 		return nil, fmt.Errorf("no API key configured for provider (model: %s)", model)
@@ -275,4 +344,4 @@ func CreateProvider(cfg *config.Config) (LLMProvider, error) {
 	}
 
 	return NewHTTPProvider(apiKey, apiBase), nil
-}
+}