Add Novita AI as LLM provider

- Add NOVITA_BASE_URL constant to model_catalog.rs
- Register novita provider in provider_defaults() with OpenAI-compatible endpoint
- Add novita to known_providers() list
- Add novita to detect_available_provider() auto-detection probe
- Document NOVITA_API_KEY in .env.example

Novita AI uses an OpenAI-compatible API at https://api.novita.ai/openai/v1
Default model: moonshotai/kimi-k2.5

.env.example

@@ -32,6 +32,9 @@
 # Fireworks AI
 # FIREWORKS_API_KEY=...
 
+# Novita AI (multi-model gateway)
+# NOVITA_API_KEY=...
+
 # ─── Local LLM Providers (no API key needed) ─────────────────────────
 
 # Ollama (default: http://localhost:11434)

crates/openfang-runtime/src/drivers/mod.rs

@@ -18,10 +18,10 @@ use openfang_types::model_catalog::{
     AI21_BASE_URL, ANTHROPIC_BASE_URL, AZURE_OPENAI_BASE_URL, CEREBRAS_BASE_URL, CHUTES_BASE_URL,
     COHERE_BASE_URL, DEEPSEEK_BASE_URL, FIREWORKS_BASE_URL, GEMINI_BASE_URL, GROQ_BASE_URL,
     HUGGINGFACE_BASE_URL, KIMI_CODING_BASE_URL, LEMONADE_BASE_URL, LMSTUDIO_BASE_URL,
-    MINIMAX_BASE_URL, MISTRAL_BASE_URL, MOONSHOT_BASE_URL, NVIDIA_NIM_BASE_URL, OLLAMA_BASE_URL,
+    MINIMAX_BASE_URL, MISTRAL_BASE_URL, MOONSHOT_BASE_URL, NVIDIA_NIM_BASE_URL, NOVITA_BASE_URL,
-    OPENAI_BASE_URL, OPENROUTER_BASE_URL, PERPLEXITY_BASE_URL, QIANFAN_BASE_URL, QWEN_BASE_URL,
+    OLLAMA_BASE_URL, OPENAI_BASE_URL, OPENROUTER_BASE_URL, PERPLEXITY_BASE_URL, QIANFAN_BASE_URL,
-    REPLICATE_BASE_URL, SAMBANOVA_BASE_URL, TOGETHER_BASE_URL, VENICE_BASE_URL, VLLM_BASE_URL,
+    QWEN_BASE_URL, REPLICATE_BASE_URL, SAMBANOVA_BASE_URL, TOGETHER_BASE_URL, VENICE_BASE_URL,
-    VOLCENGINE_BASE_URL, VOLCENGINE_CODING_BASE_URL, XAI_BASE_URL, ZAI_BASE_URL,
+    VLLM_BASE_URL, VOLCENGINE_BASE_URL, VOLCENGINE_CODING_BASE_URL, XAI_BASE_URL, ZAI_BASE_URL,
     ZAI_CODING_BASE_URL, ZHIPU_BASE_URL, ZHIPU_CODING_BASE_URL,
 };
 use std::sync::Arc;
@@ -222,6 +222,11 @@ fn provider_defaults(provider: &str) -> Option<ProviderDefaults> {
             api_key_env: "NVIDIA_API_KEY",
             key_required: true,
         }),
+        "novita" | "novita-ai" => Some(ProviderDefaults {
+            base_url: NOVITA_BASE_URL,
+            api_key_env: "NOVITA_API_KEY",
+            key_required: true,
+        }),
         "azure" | "azure-openai" => Some(ProviderDefaults {
             base_url: AZURE_OPENAI_BASE_URL,
             api_key_env: "AZURE_OPENAI_API_KEY",
@@ -530,6 +535,7 @@ pub fn detect_available_provider() -> Option<(&'static str, &'static str, &'stat
             "PERPLEXITY_API_KEY",
         ),
         ("cohere", "command-r-plus", "COHERE_API_KEY"),
+        ("novita", "moonshotai/kimi-k2.5", "NOVITA_API_KEY"),
     ];
     for &(provider, model, env_var) in PROBE_ORDER {
         if std::env::var(env_var)
@@ -587,6 +593,7 @@ pub fn known_providers() -> &'static [&'static str] {
         "chutes",
         "venice",
         "nvidia",
+        "novita",
         "codex",
         "claude-code",
         "qwen-code",
@@ -691,11 +698,12 @@ mod tests {
         assert!(providers.contains(&"volcengine"));
         assert!(providers.contains(&"chutes"));
         assert!(providers.contains(&"nvidia"));
+        assert!(providers.contains(&"novita"));
         assert!(providers.contains(&"codex"));
         assert!(providers.contains(&"claude-code"));
         assert!(providers.contains(&"qwen-code"));
         assert!(providers.contains(&"azure"));
-        assert_eq!(providers.len(), 37);
+        assert_eq!(providers.len(), 38);
     }
 
     #[test]

crates/openfang-types/src/model_catalog.rs

@@ -32,6 +32,10 @@ pub const REPLICATE_BASE_URL: &str = "https://api.replicate.com/v1";
 pub const VENICE_BASE_URL: &str = "https://api.venice.ai/api/v1";
 pub const NVIDIA_NIM_BASE_URL: &str = "https://integrate.api.nvidia.com/v1";
 
+// ── Novita AI ─────────────────────────────────────────────────────
+/// Novita AI OpenAI-compatible endpoint.
+pub const NOVITA_BASE_URL: &str = "https://api.novita.ai/openai/v1";
+
 // ── GitHub Copilot ──────────────────────────────────────────────
 pub const GITHUB_COPILOT_BASE_URL: &str = "https://api.githubcopilot.com";