mentra 0.7.0

An agent runtime for tool-using LLM applications
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

#[cfg(test)]
use serde_json::json;

use crate::mcp::bridge::{mcp_tool_name, parse_mcp_tool_name};
use crate::mcp::protocol::*;

#[test]
fn mcp_tool_name_namespacing() {
    assert_eq!(mcp_tool_name("filesystem", "read"), "mcp__filesystem__read");
    assert_eq!(
        mcp_tool_name("my-server", "do_thing"),
        "mcp__my-server__do_thing"
    );
}

#[test]
fn parse_mcp_tool_name_roundtrip() {
    let name = mcp_tool_name("filesystem", "read");
    let (server, tool) = parse_mcp_tool_name(&name).expect("should parse");
    assert_eq!(server, "filesystem");
    assert_eq!(tool, "read");
}

#[test]
fn parse_mcp_tool_name_rejects_non_mcp() {
    assert!(parse_mcp_tool_name("regular_tool").is_none());
    assert!(parse_mcp_tool_name("mcp_no_double_underscore").is_none());
}

#[test]
fn json_rpc_request_serialization() {
    let req = JsonRpcRequest::new(1, "initialize", Some(json!({"key": "value"})));
    let serialized = serde_json::to_string(&req).expect("serialize");
    assert!(serialized.contains("\"jsonrpc\":\"2.0\""));
    assert!(serialized.contains("\"id\":1"));
    assert!(serialized.contains("\"method\":\"initialize\""));
}

#[test]
fn json_rpc_response_deserialization() {
    let json = r#"{"jsonrpc":"2.0","id":1,"result":{"tools":[]}}"#;
    let resp: JsonRpcResponse = serde_json::from_str(json).expect("deserialize");
    assert_eq!(resp.id, JsonRpcId::Number(1));
    assert!(resp.result.is_some());
    assert!(resp.error.is_none());
}

#[test]
fn json_rpc_error_response_deserialization() {
    let json = r#"{"jsonrpc":"2.0","id":2,"error":{"code":-32600,"message":"Invalid Request"}}"#;
    let resp: JsonRpcResponse = serde_json::from_str(json).expect("deserialize");
    assert_eq!(resp.id, JsonRpcId::Number(2));
    let err = resp.error.expect("should have error");
    assert_eq!(err.code, -32600);
    assert_eq!(err.message, "Invalid Request");
}

#[test]
fn mcp_tool_definition_deserialization() {
    let json = json!({
        "name": "read_file",
        "description": "Read a file from disk",
        "inputSchema": {
            "type": "object",
            "properties": {
                "path": {"type": "string"}
            },
            "required": ["path"]
        }
    });
    let tool: McpToolDefinition = serde_json::from_value(json).expect("deserialize");
    assert_eq!(tool.name, "read_file");
    assert_eq!(tool.description.as_deref(), Some("Read a file from disk"));
    assert!(tool.input_schema.is_some());
}

#[test]
fn mcp_tool_call_result_deserialization() {
    let json = json!({
        "content": [
            {"type": "text", "text": "Hello, world!"},
            {"type": "text", "text": "Second block"}
        ],
        "isError": false
    });
    let result: McpToolCallResult = serde_json::from_value(json).expect("deserialize");
    assert_eq!(result.content.len(), 2);
    assert!(!result.is_error);
    assert_eq!(result.content[0].text.as_deref(), Some("Hello, world!"));
}

#[test]
fn mcp_tool_call_error_result() {
    let json = json!({
        "content": [{"type": "text", "text": "Something went wrong"}],
        "isError": true
    });
    let result: McpToolCallResult = serde_json::from_value(json).expect("deserialize");
    assert!(result.is_error);
}

#[test]
fn mcp_server_config_deserialization() {
    let json = json!({
        "name": "filesystem",
        "command": "npx",
        "args": ["-y", "@modelcontextprotocol/server-filesystem", "/tmp"],
        "env": {"DEBUG": "1"},
        "cwd": "/home/user"
    });
    let config: McpServerConfig = serde_json::from_value(json).expect("deserialize");
    assert_eq!(config.name, "filesystem");
    assert_eq!(config.command, "npx");
    assert_eq!(config.args.len(), 3);
    assert_eq!(config.env.get("DEBUG").map(String::as_str), Some("1"));
    assert_eq!(config.cwd.as_deref(), Some("/home/user"));
}

#[test]
fn mcp_initialize_params_serialization() {
    let params = McpInitializeParams {
        protocol_version: "2024-11-05".to_string(),
        capabilities: json!({}),
        client_info: McpClientInfo {
            name: "mentra".to_string(),
            version: "0.6.0".to_string(),
        },
    };
    let json = serde_json::to_value(&params).expect("serialize");
    assert_eq!(json["protocolVersion"], "2024-11-05");
    assert_eq!(json["clientInfo"]["name"], "mentra");
}