feat: add internal ZCLAW kernel crates to git tracking

crates/zclaw-runtime/src/driver/gemini.rs

@@ -0,0 +1,49 @@
+//! Google Gemini driver implementation
+
+use async_trait::async_trait;
+use secrecy::{ExposeSecret, SecretString};
+use reqwest::Client;
+use zclaw_types::Result;
+
+use super::{CompletionRequest, CompletionResponse, ContentBlock, LlmDriver, StopReason};
+
+/// Google Gemini driver
+pub struct GeminiDriver {
+    client: Client,
+    api_key: SecretString,
+    base_url: String,
+}
+
+impl GeminiDriver {
+    pub fn new(api_key: SecretString) -> Self {
+        Self {
+            client: Client::new(),
+            api_key,
+            base_url: "https://generativelanguage.googleapis.com/v1beta".to_string(),
+        }
+    }
+}
+
+#[async_trait]
+impl LlmDriver for GeminiDriver {
+    fn provider(&self) -> &str {
+        "gemini"
+    }
+
+    fn is_configured(&self) -> bool {
+        !self.api_key.expose_secret().is_empty()
+    }
+
+    async fn complete(&self, request: CompletionRequest) -> Result<CompletionResponse> {
+        // TODO: Implement actual API call
+        Ok(CompletionResponse {
+            content: vec![ContentBlock::Text {
+                text: "Gemini driver not yet implemented".to_string(),
+            }],
+            model: request.model,
+            input_tokens: 0,
+            output_tokens: 0,
+            stop_reason: StopReason::EndTurn,
+        })
+    }
+}