feat(registry): refresh model catalog from network

internal/registry/model_definitions.go

@@ -1,5 +1,5 @@
 // Package registry provides model definitions and lookup helpers for various AI providers.
-// Static model metadata is stored in model_definitions_static_data.go.
+// Static model metadata is loaded from the embedded models.json file and can be refreshed from network.
 package registry
 
 import (
@@ -7,6 +7,131 @@ import (
 	"strings"
 )
 
+// AntigravityModelConfig captures static antigravity model overrides, including
+// Thinking budget limits and provider max completion tokens.
+type AntigravityModelConfig struct {
+	Thinking            *ThinkingSupport `json:"thinking,omitempty"`
+	MaxCompletionTokens int              `json:"max_completion_tokens,omitempty"`
+}
+
+// staticModelsJSON mirrors the top-level structure of models.json.
+type staticModelsJSON struct {
+	Claude      []*ModelInfo                       `json:"claude"`
+	Gemini      []*ModelInfo                       `json:"gemini"`
+	Vertex      []*ModelInfo                       `json:"vertex"`
+	GeminiCLI   []*ModelInfo                       `json:"gemini-cli"`
+	AIStudio    []*ModelInfo                       `json:"aistudio"`
+	CodexFree   []*ModelInfo                       `json:"codex-free"`
+	CodexTeam   []*ModelInfo                       `json:"codex-team"`
+	CodexPlus   []*ModelInfo                       `json:"codex-plus"`
+	CodexPro    []*ModelInfo                       `json:"codex-pro"`
+	Qwen        []*ModelInfo                       `json:"qwen"`
+	IFlow       []*ModelInfo                       `json:"iflow"`
+	Kimi        []*ModelInfo                       `json:"kimi"`
+	Antigravity map[string]*AntigravityModelConfig `json:"antigravity"`
+}
+
+// GetClaudeModels returns the standard Claude model definitions.
+func GetClaudeModels() []*ModelInfo {
+	return cloneModelInfos(getModels().Claude)
+}
+
+// GetGeminiModels returns the standard Gemini model definitions.
+func GetGeminiModels() []*ModelInfo {
+	return cloneModelInfos(getModels().Gemini)
+}
+
+// GetGeminiVertexModels returns Gemini model definitions for Vertex AI.
+func GetGeminiVertexModels() []*ModelInfo {
+	return cloneModelInfos(getModels().Vertex)
+}
+
+// GetGeminiCLIModels returns Gemini model definitions for the Gemini CLI.
+func GetGeminiCLIModels() []*ModelInfo {
+	return cloneModelInfos(getModels().GeminiCLI)
+}
+
+// GetAIStudioModels returns model definitions for AI Studio.
+func GetAIStudioModels() []*ModelInfo {
+	return cloneModelInfos(getModels().AIStudio)
+}
+
+// GetCodexFreeModels returns model definitions for the Codex free plan tier.
+func GetCodexFreeModels() []*ModelInfo {
+	return cloneModelInfos(getModels().CodexFree)
+}
+
+// GetCodexTeamModels returns model definitions for the Codex team plan tier.
+func GetCodexTeamModels() []*ModelInfo {
+	return cloneModelInfos(getModels().CodexTeam)
+}
+
+// GetCodexPlusModels returns model definitions for the Codex plus plan tier.
+func GetCodexPlusModels() []*ModelInfo {
+	return cloneModelInfos(getModels().CodexPlus)
+}
+
+// GetCodexProModels returns model definitions for the Codex pro plan tier.
+func GetCodexProModels() []*ModelInfo {
+	return cloneModelInfos(getModels().CodexPro)
+}
+
+// GetQwenModels returns the standard Qwen model definitions.
+func GetQwenModels() []*ModelInfo {
+	return cloneModelInfos(getModels().Qwen)
+}
+
+// GetIFlowModels returns the standard iFlow model definitions.
+func GetIFlowModels() []*ModelInfo {
+	return cloneModelInfos(getModels().IFlow)
+}
+
+// GetKimiModels returns the standard Kimi (Moonshot AI) model definitions.
+func GetKimiModels() []*ModelInfo {
+	return cloneModelInfos(getModels().Kimi)
+}
+
+// GetAntigravityModelConfig returns static configuration for antigravity models.
+// Keys use upstream model names returned by the Antigravity models endpoint.
+func GetAntigravityModelConfig() map[string]*AntigravityModelConfig {
+	data := getModels()
+	if len(data.Antigravity) == 0 {
+		return nil
+	}
+	out := make(map[string]*AntigravityModelConfig, len(data.Antigravity))
+	for k, v := range data.Antigravity {
+		out[k] = cloneAntigravityModelConfig(v)
+	}
+	return out
+}
+
+func cloneAntigravityModelConfig(cfg *AntigravityModelConfig) *AntigravityModelConfig {
+	if cfg == nil {
+		return nil
+	}
+	copyConfig := *cfg
+	if cfg.Thinking != nil {
+		copyThinking := *cfg.Thinking
+		if len(cfg.Thinking.Levels) > 0 {
+			copyThinking.Levels = append([]string(nil), cfg.Thinking.Levels...)
+		}
+		copyConfig.Thinking = &copyThinking
+	}
+	return &copyConfig
+}
+
+// cloneModelInfos returns a shallow copy of the slice with each element deep-cloned.
+func cloneModelInfos(models []*ModelInfo) []*ModelInfo {
+	if len(models) == 0 {
+		return nil
+	}
+	out := make([]*ModelInfo, len(models))
+	for i, m := range models {
+		out[i] = cloneModelInfo(m)
+	}
+	return out
+}
+
 // GetStaticModelDefinitionsByChannel returns static model definitions for a given channel/provider.
 // It returns nil when the channel is unknown.
 //
@@ -77,27 +202,28 @@ func LookupStaticModelInfo(modelID string) *ModelInfo {
 		return nil
 	}
 
+	data := getModels()
 	allModels := [][]*ModelInfo{
-		GetClaudeModels(),
-		GetGeminiModels(),
-		GetGeminiVertexModels(),
-		GetGeminiCLIModels(),
-		GetAIStudioModels(),
-		GetCodexProModels(),
-		GetQwenModels(),
-		GetIFlowModels(),
-		GetKimiModels(),
+		data.Claude,
+		data.Gemini,
+		data.Vertex,
+		data.GeminiCLI,
+		data.AIStudio,
+		data.CodexPro,
+		data.Qwen,
+		data.IFlow,
+		data.Kimi,
 	}
 	for _, models := range allModels {
 		for _, m := range models {
 			if m != nil && m.ID == modelID {
-				return m
+				return cloneModelInfo(m)
 			}
 		}
 	}
 
 	// Check Antigravity static config
-	if cfg := GetAntigravityModelConfig()[modelID]; cfg != nil {
+	if cfg := cloneAntigravityModelConfig(data.Antigravity[modelID]); cfg != nil {
 		return &ModelInfo{
 			ID:                  modelID,
 			Thinking:            cfg.Thinking,