omk 0.5.0

A Rust runtime for Kimi CLI. Turns prompts into proof-backed engineering runs with gates, worktrees, and replay.
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

use anyhow::{bail, Context, Result};
use serde::{Deserialize, Serialize};
use serde_json::Value;
use tracing::{debug, info, warn};

use super::types::{JsonRpcPayload, JsonRpcRequest, JsonRpcResponse, McpClient};
use crate::mcp::client::transport_trait::McpTransport;
use crate::mcp::client::types::InitializeResult;

impl<T: McpTransport> McpClient<T> {
    pub fn new(transport: T, server_name: impl Into<String>) -> Self {
        Self {
            transport,
            request_id: 0,
            server_name: server_name.into(),
        }
    }

    fn next_id(&mut self) -> u64 {
        self.request_id += 1;
        self.request_id
    }

    pub(crate) async fn request<P: Serialize, R: for<'de> Deserialize<'de>>(
        &mut self,
        method: &str,
        params: Option<P>,
    ) -> Result<R> {
        let id = self.next_id();
        let req = JsonRpcRequest {
            jsonrpc: "2.0".to_string(),
            id,
            method: method.to_string(),
            params,
        };
        let req_json = serde_json::to_string(&req).with_context(|| {
            format!(
                "failed to serialize MCP {method} request for {}",
                self.server_name
            )
        })?;
        self.transport.send(req_json).await.with_context(|| {
            format!(
                "MCP transport send failed for {} method {method}",
                self.server_name
            )
        })?;

        let deadline = tokio::time::Instant::now() + std::time::Duration::from_secs(60);
        loop {
            let line = match tokio::time::timeout_at(deadline, self.transport.recv()).await {
                Ok(Ok(Some(l))) => l,
                Ok(Ok(None)) => bail!("MCP server {} closed connection", self.server_name),
                Ok(Err(e)) => bail!("MCP transport recv error for {}: {e}", self.server_name),
                Err(_) => bail!(
                    "MCP request timeout for {method} on {} after 60s",
                    self.server_name
                ),
            };

            // Demux: skip notifications and responses that don't match our id.
            let value: Value = serde_json::from_str(&line).with_context(|| {
                format!(
                    "failed to parse MCP JSON from {} for method {method}: {line}",
                    self.server_name
                )
            })?;
            if value.get("id").is_none() {
                debug!(server = %self.server_name, line = %line, "MCP notification or unsolicited message, skipping");
                continue;
            }
            let resp: JsonRpcResponse<R> = serde_json::from_value(value).with_context(|| {
                format!(
                    "failed to parse MCP response from {} for method {method}: {line}",
                    self.server_name
                )
            })?;
            if resp.jsonrpc != "2.0" {
                bail!(
                    "MCP server {} returned unsupported JSON-RPC version {} for {}",
                    self.server_name,
                    resp.jsonrpc,
                    method
                );
            }
            if resp.id != id {
                warn!(server = %self.server_name, expected = id, got = resp.id, "MCP JSON-RPC id mismatch, skipping");
                continue;
            }
            match resp.payload {
                JsonRpcPayload::Result(result) => return Ok(result),
                JsonRpcPayload::Error(err) => {
                    if let Some(data) = err.data {
                        bail!(
                            "MCP server {} returned error for {}: {} (code: {}, data: {})",
                            self.server_name,
                            method,
                            err.message,
                            err.code,
                            data
                        );
                    }
                    bail!(
                        "MCP server {} returned error for {}: {} (code: {})",
                        self.server_name,
                        method,
                        err.message,
                        err.code
                    );
                }
            }
        }
    }

    pub async fn initialize(&mut self) -> Result<InitializeResult> {
        let params = serde_json::json!({
            "protocolVersion": "2024-11-05",
            "capabilities": {
                "tools": {},
                "resources": {}
            },
            "clientInfo": {
                "name": "omk-mcp-client",
                "version": env!("CARGO_PKG_VERSION")
            }
        });
        let result: InitializeResult = self.request("initialize", Some(params)).await?;
        let notify = serde_json::json!({"jsonrpc": "2.0", "method": "notifications/initialized"});
        let notify_json =
            serde_json::to_string(&notify).context("serialize initialized notification")?;
        if let Err(e) = self.transport.send(notify_json).await {
            warn!(error = %e, "failed to send initialized notification");
        }
        info!(server = %self.server_name, version = %result.protocol_version, "MCP client initialized");
        Ok(result)
    }
}