llmshim 0.1.26

Blazing fast LLM API translation layer in pure Rust
Documentation 
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

use serde::{Deserialize, Serialize};
use serde_json::Value;

// ============================================================
// Request types
// ============================================================

#[derive(Debug, Deserialize)]
pub struct ChatRequest {
    /// Model identifier: "provider/model" or auto-detected (e.g., "claude-sonnet-4-6")
    pub model: String,

    /// Conversation messages
    pub messages: Vec<Message>,

    /// Whether to stream the response (only on /v1/chat)
    #[serde(default)]
    pub stream: bool,

    /// Provider-agnostic configuration
    #[serde(default)]
    pub config: Option<Config>,

    /// Raw provider-specific JSON, merged into the underlying request
    #[serde(default)]
    pub provider_config: Option<Value>,

    /// Fallback models to try if the primary model fails (ordered).
    /// On retryable errors (429, 500, 502, 503), tries the next model in the list.
    #[serde(default)]
    pub fallback: Option<Vec<String>>,
}

#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct Message {
    pub role: String,

    #[serde(default)]
    pub content: Value,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub tool_call_id: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub tool_calls: Option<Value>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub reasoning_content: Option<String>,
}

#[derive(Debug, Deserialize)]
pub struct Config {
    pub max_tokens: Option<u64>,
    pub temperature: Option<f64>,
    pub top_p: Option<f64>,
    pub top_k: Option<u64>,
    pub stop: Option<Vec<String>>,
    /// Unified reasoning depth: none|low|medium|high|xhigh|max.
    /// Mapped per provider/model with clamping — see docs/reasoning.md.
    pub reasoning_effort: Option<String>,
    /// Unified reasoning mode: standard (default) | pro. Native on OpenAI
    /// gpt-5.6/-pro models; emulated as a one-tier effort bump elsewhere.
    pub reasoning_mode: Option<String>,
}

// ============================================================
// Response types
// ============================================================

#[derive(Debug, Serialize)]
pub struct ChatResponse {
    pub id: String,
    pub model: String,
    pub provider: String,
    pub message: ResponseMessage,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub reasoning: Option<String>,
    pub usage: Usage,
    pub latency_ms: u64,
}

#[derive(Debug, Serialize)]
pub struct ResponseMessage {
    pub role: String,
    pub content: Value,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub tool_calls: Option<Value>,
}

#[derive(Debug, Serialize, Clone)]
pub struct Usage {
    pub input_tokens: u64,
    pub output_tokens: u64,
    #[serde(skip_serializing_if = "is_zero")]
    pub reasoning_tokens: u64,
    pub total_tokens: u64,
}

fn is_zero(v: &u64) -> bool {
    *v == 0
}

// ============================================================
// SSE stream event types
// ============================================================

#[derive(Debug, Serialize)]
#[serde(tag = "type")]
pub enum StreamEvent {
    #[serde(rename = "content")]
    Content { text: String },

    #[serde(rename = "reasoning")]
    Reasoning { text: String },

    #[serde(rename = "tool_call")]
    ToolCall {
        id: String,
        name: String,
        arguments: String,
    },

    #[serde(rename = "usage")]
    Usage(Usage),

    #[serde(rename = "done")]
    Done {},

    #[serde(rename = "error")]
    Error { message: String },
}

// ============================================================
// Models endpoint
// ============================================================

#[derive(Debug, Serialize)]
pub struct ModelsResponse {
    pub models: Vec<ModelEntry>,
}

#[derive(Debug, Serialize)]
pub struct ModelEntry {
    pub id: String,
    pub provider: String,
    pub name: String,
}

// ============================================================
// Health endpoint
// ============================================================

#[derive(Debug, Serialize)]
pub struct HealthResponse {
    pub status: String,
    pub providers: Vec<String>,
}

// ============================================================
// Error response
// ============================================================

#[derive(Debug, Serialize)]
pub struct ErrorResponse {
    pub error: ErrorDetail,
}

#[derive(Debug, Serialize)]
pub struct ErrorDetail {
    pub code: String,
    pub message: String,
}