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lean_ctx/tools/registered/
ctx_discover.rs

1use rmcp::model::Tool;
2use rmcp::ErrorData;
3use serde_json::{json, Map, Value};
4
5use crate::server::tool_trait::{get_int, McpTool, ToolContext, ToolOutput};
6use crate::tool_defs::tool_def;
7
8pub struct CtxDiscoverTool;
9
10impl McpTool for CtxDiscoverTool {
11    fn name(&self) -> &'static str {
12        "ctx_discover"
13    }
14
15    fn tool_def(&self) -> Tool {
16        tool_def(
17            "ctx_discover",
18            "Find missed compression opportunities in shell history.",
19            json!({
20                "type": "object",
21                "properties": {
22                    "limit": { "type": "integer" }
23                }
24            }),
25        )
26    }
27
28    fn handle(
29        &self,
30        args: &Map<String, Value>,
31        _ctx: &ToolContext,
32    ) -> Result<ToolOutput, ErrorData> {
33        let limit = get_int(args, "limit").unwrap_or(15) as usize;
34        let history = crate::cli::load_shell_history_pub();
35        let result = crate::tools::ctx_discover::discover_from_history(&history, limit);
36
37        Ok(ToolOutput::simple(result))
38    }
39}