Add Atlas Cloud LLM provider

crates/webclaw-llm/src/chain.rs

@@ -1,5 +1,5 @@
 /// Provider chain — tries providers in order until one succeeds.
-/// Default order: Ollama (local, free) -> OpenAI -> Gemini -> Anthropic.
+/// Default order: Ollama (local, free) -> OpenAI -> Atlas Cloud -> Gemini -> Anthropic.
 /// Only includes providers that are actually configured/available.
 use async_trait::async_trait;
 use tracing::{debug, warn};
@@ -7,8 +7,8 @@ use tracing::{debug, warn};
 use crate::error::LlmError;
 use crate::provider::{CompletionRequest, LlmProvider};
 use crate::providers::{
-    anthropic::AnthropicProvider, gemini::GeminiProvider, ollama::OllamaProvider,
-    openai::OpenAiProvider,
+    anthropic::AnthropicProvider, atlascloud::AtlasCloudProvider, gemini::GeminiProvider,
+    ollama::OllamaProvider, openai::OpenAiProvider,
 };
 
 pub struct ProviderChain {
@@ -16,7 +16,7 @@ pub struct ProviderChain {
 }
 
 impl ProviderChain {
-    /// Build the default chain: Ollama -> OpenAI -> Gemini -> Anthropic.
+    /// Build the default chain: Ollama -> OpenAI -> Atlas Cloud -> Gemini -> Anthropic.
     /// Ollama is always added (availability checked at call time).
     /// Cloud providers are only added if their API keys are configured.
     /// Gemini sits ahead of Anthropic so Google Cloud credits are preferred,
@@ -37,6 +37,11 @@ impl ProviderChain {
             providers.push(Box::new(openai));
         }
 
+        if let Some(atlascloud) = AtlasCloudProvider::new(None, None) {
+            debug!("atlascloud configured, adding to chain");
+            providers.push(Box::new(atlascloud));
+        }
+
         if let Some(gemini) = GeminiProvider::new(None, None, None) {
             debug!("gemini configured, adding to chain");
             providers.push(Box::new(gemini));

crates/webclaw-llm/src/providers/atlascloud.rs

@@ -0,0 +1,71 @@
+/// Atlas Cloud provider — OpenAI-compatible chat completions with Atlas defaults.
+use async_trait::async_trait;
+
+use crate::error::LlmError;
+use crate::provider::{CompletionRequest, LlmProvider};
+
+use super::openai::OpenAiProvider;
+
+pub struct AtlasCloudProvider {
+    inner: OpenAiProvider,
+}
+
+impl AtlasCloudProvider {
+    /// Returns `None` if no Atlas Cloud API key is available (param or env).
+    pub fn new(key_override: Option<String>, model: Option<String>) -> Option<Self> {
+        let key = super::load_api_key(key_override, "ATLASCLOUD_API_KEY")?;
+        let base_url = std::env::var("ATLASCLOUD_BASE_URL")
+            .ok()
+            .unwrap_or_else(|| "https://api.atlascloud.ai/v1".into());
+        let model = model.unwrap_or_else(|| "qwen/qwen3.5-flash".into());
+        let inner = OpenAiProvider::new(Some(key), Some(base_url), Some(model))?;
+        Some(Self { inner })
+    }
+
+    pub fn default_model(&self) -> &str {
+        self.inner.default_model()
+    }
+}
+
+#[async_trait]
+impl LlmProvider for AtlasCloudProvider {
+    async fn complete(&self, request: &CompletionRequest) -> Result<String, LlmError> {
+        self.inner.complete(request).await
+    }
+
+    async fn is_available(&self) -> bool {
+        self.inner.is_available().await
+    }
+
+    fn name(&self) -> &str {
+        "atlascloud"
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn empty_key_returns_none() {
+        assert!(AtlasCloudProvider::new(Some(String::new()), None).is_none());
+    }
+
+    #[test]
+    fn explicit_key_constructs_with_atlas_defaults() {
+        let provider = AtlasCloudProvider::new(Some("test-key".into()), None)
+            .expect("should construct");
+        assert_eq!(provider.name(), "atlascloud");
+        assert_eq!(provider.default_model(), "qwen/qwen3.5-flash");
+    }
+
+    #[test]
+    fn explicit_model_override() {
+        let provider = AtlasCloudProvider::new(
+            Some("test-key".into()),
+            Some("deepseek-ai/deepseek-v4-pro".into()),
+        )
+        .expect("should construct");
+        assert_eq!(provider.default_model(), "deepseek-ai/deepseek-v4-pro");
+    }
+}

crates/webclaw-llm/src/providers/mod.rs

@@ -1,4 +1,5 @@
 pub mod anthropic;
+pub mod atlascloud;
 pub mod gemini;
 pub mod ollama;
 pub mod openai;