Skeleton for the Coding Agent. (#1)

Reviewed-on: #1
Co-authored-by: Drew Galbraith <drew@tiramisu.one>
Co-committed-by: Drew Galbraith <drew@tiramisu.one>

src/provider/mod.rs

@@ -0,0 +1,19 @@
+mod claude;
+
+pub use claude::ClaudeProvider;
+
+use futures::Stream;
+
+use crate::core::types::{ConversationMessage, StreamEvent};
+
+/// Trait for model providers that can stream conversation responses.
+///
+/// Implementors take a conversation history and return a stream of [`StreamEvent`]s.
+/// The trait is provider-agnostic -- no Claude-specific types appear here.
+pub trait ModelProvider: Send + Sync {
+    /// Stream a response from the model given the conversation history.
+    fn stream<'a>(
+        &'a self,
+        messages: &'a [ConversationMessage],
+    ) -> impl Stream<Item = StreamEvent> + Send + 'a;
+}