1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
//! Engine provider — thin wrapper around oxi-sdk's Oxi.
//!
//! oxios uses oxi-sdk as the AI engine. This module re-exports the
//! EngineProvider trait for the kernel so it can be swapped for testing.
//!
//! All provider/model resolution goes through `oxi_sdk::OxiBuilder`.
//! The `OxiosEngine` struct wraps the SDK instance and exposes a clean API.
use anyhow::Result;
use oxi_sdk::{Oxi, OxiBuilder};
use std::sync::Arc;
/// The kernel's engine — wraps oxi-sdk's Oxi instance.
pub struct OxiosEngine {
oxi: Oxi,
default_model_id: String,
}
impl OxiosEngine {
/// Create a new engine with the given default model.
///
/// Internally calls `OxiBuilder::new().with_builtins()` to load all
/// 50+ built-in models and providers.
pub fn new(default_model_id: impl Into<String>) -> Self {
let model_id = default_model_id.into();
let provider_name = model_id
.split_once('/')
.map(|(p, _)| p)
.unwrap_or("anthropic");
// Workaround: create_builtin_provider("zai") uses OpenAiProvider::with_base_url()
// without an API key. We register a custom provider with the key attached.
let mut builder = OxiBuilder::new().with_builtins();
if provider_name == "zai" {
let api_key = std::env::var("ZAI_API_KEY")
.or_else(|_| std::env::var("ANTHROPIC_API_KEY"))
.ok();
let zai_provider = oxi_ai::OpenAiProvider::with_base_url_and_key(
"https://open.bigmodel.cn/api/paas/v4",
api_key,
);
builder = builder.provider("zai", zai_provider);
tracing::info!("Registered zai provider with API key (OpenAI-compatible)");
}
let oxi = builder.build();
Self {
oxi,
default_model_id: model_id,
}
}
/// Get a reference to the underlying Oxi instance.
///
/// Use this when you need to pass the engine to oxi-sdk APIs directly
/// (e.g., `AgentBuilder`, `MessageBus`, `AgentGroup`).
pub fn oxi(&self) -> &Oxi {
&self.oxi
}
/// Resolve a model ID to a Model.
///
/// Accepts both `"provider/model"` and bare `"model"` forms.
/// When no provider prefix is given, defaults to `"anthropic"`.
pub fn resolve_model(&self, model_id: &str) -> Result<oxi_sdk::Model> {
self.oxi.resolve_model(model_id)
}
/// Create a provider for the given provider name.
///
/// Checks custom providers first, then falls back to built-in
/// providers (stateless creation).
pub fn create_provider(&self, name: &str) -> Result<Arc<dyn oxi_sdk::Provider>> {
self.oxi.create_provider(name)
}
}
// ---------------------------------------------------------------------------
// EngineProvider trait (kept for API compatibility)
// ---------------------------------------------------------------------------
/// Engine provider trait — abstracts how the kernel obtains AI providers.
///
/// This trait is implemented by `OxiEngineProvider` and can be replaced
/// with a mock for testing.
pub trait EngineProvider: Send + Sync {
/// Create a provider for the given provider name.
fn create_provider(&self, provider_name: &str) -> Result<Arc<dyn oxi_sdk::Provider>>;
/// Resolve a "provider/model" string to a Model.
fn resolve_model(&self, model_id: &str) -> Result<oxi_sdk::Model>;
/// Get the default model ID.
fn default_model_id(&self) -> &str;
}
/// Default engine provider using oxi-sdk.
pub struct OxiEngineProvider {
engine: OxiosEngine,
}
impl OxiEngineProvider {
/// Create a new engine provider with the given default model ID.
pub fn new(default_model_id: impl Into<String>) -> Self {
Self {
engine: OxiosEngine::new(default_model_id),
}
}
}
impl EngineProvider for OxiEngineProvider {
fn create_provider(&self, provider_name: &str) -> Result<Arc<dyn oxi_sdk::Provider>> {
self.engine.create_provider(provider_name)
}
fn resolve_model(&self, model_id: &str) -> Result<oxi_sdk::Model> {
self.engine.resolve_model(model_id)
}
fn default_model_id(&self) -> &str {
&self.engine.default_model_id
}
}
impl std::fmt::Debug for OxiEngineProvider {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("OxiEngineProvider")
.field("default_model_id", &self.engine.default_model_id)
.finish()
}
}
// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_resolve_model_with_provider_prefix() {
let engine = OxiEngineProvider::new("anthropic/claude-sonnet-4-20250514");
let model = engine.resolve_model("openai/gpt-4o").unwrap();
assert_eq!(model.provider, "openai");
assert_eq!(model.id, "gpt-4o");
}
#[test]
fn test_resolve_model_without_provider_prefix() {
let engine = OxiEngineProvider::new("anthropic/claude-sonnet-4-20250514");
let model = engine.resolve_model("claude-sonnet-4-20250514").unwrap();
assert_eq!(model.provider, "anthropic");
}
#[test]
fn test_default_model_id() {
let engine = OxiEngineProvider::new("anthropic/claude-sonnet-4-20250514");
assert_eq!(
engine.default_model_id(),
"anthropic/claude-sonnet-4-20250514"
);
}
#[test]
fn test_resolve_model_not_found() {
let engine = OxiEngineProvider::new("anthropic/claude-sonnet-4-20250514");
let result = engine.resolve_model("nonexistent/model-xyz");
assert!(result.is_err());
}
#[test]
fn test_create_provider_anthropic() {
let engine = OxiEngineProvider::new("anthropic/claude-sonnet-4-20250514");
let provider = engine.create_provider("anthropic");
assert!(provider.is_ok());
}
#[test]
fn test_create_provider_not_found() {
let engine = OxiEngineProvider::new("anthropic/claude-sonnet-4-20250514");
let result = engine.create_provider("nonexistent_provider");
assert!(result.is_err());
}
}