36 lines
1.2 KiB
Rust
36 lines
1.2 KiB
Rust
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//! The `Backend` trait — the wire-format-agnostic seam every model backend
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//! (Ollama, Claude, Routstr) implements once. The loop and every tool are
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//! written against this trait only; wire-format differences live entirely
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//! inside each adapter.
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use std::path::Path;
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use anyhow::Result;
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use async_trait::async_trait;
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use super::tools::{ChatMessage, ToolCall, ToolDef};
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pub mod claude;
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#[cfg(test)]
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pub mod scripted;
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pub enum BackendTurn {
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Text(String),
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ToolCalls(Vec<ToolCall>),
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}
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#[async_trait]
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pub trait Backend: Send + Sync {
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async fn send(&self, system: &str, tools: &[ToolDef], history: &[ChatMessage]) -> Result<BackendTurn>;
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}
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/// D-04's backend chain: local Ollama first (node data never leaves the
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/// node when a local model is available), then Claude, then Routstr. Only
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/// the Claude leg is implemented in this tracer — `backends/ollama.rs`
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/// (13-10) and `backends/routstr.rs` (13-13) slot in ahead of and behind it
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/// without changing the `Backend` trait; that is the architectural
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/// commitment this tracer proves.
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pub fn select_backend(data_dir: &Path) -> Box<dyn Backend> {
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Box::new(claude::ClaudeBackend::new(data_dir.to_path_buf()))
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}
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