lean_ctx/tools/registered/
ctx_cache.rs

1use rmcp::model::Tool;
2use rmcp::ErrorData;
3use serde_json::{json, Map, Value};
4
5use crate::server::tool_trait::{get_str, McpTool, ToolContext, ToolOutput};
6use crate::tool_defs::tool_def;
7
8pub struct CtxCacheTool;
9
10impl McpTool for CtxCacheTool {
11    fn name(&self) -> &'static str {
12        "ctx_cache"
13    }
14
15    fn tool_def(&self) -> Tool {
16        tool_def(
17            "ctx_cache",
18            "Cache ops: status|clear|invalidate.",
19            json!({
20                "type": "object",
21                "properties": {
22                    "action": {
23                        "type": "string",
24                        "enum": ["status", "clear", "invalidate"],
25                        "description": "Cache operation to perform"
26                    },
27                    "path": {
28                        "type": "string",
29                        "description": "File path (required for 'invalidate' action)"
30                    }
31                },
32                "required": ["action"]
33            }),
34        )
35    }
36
37    fn handle(
38        &self,
39        args: &Map<String, Value>,
40        ctx: &ToolContext,
41    ) -> Result<ToolOutput, ErrorData> {
42        let action = get_str(args, "action")
43            .ok_or_else(|| ErrorData::invalid_params("action is required", None))?;
44
45        let invalidate_path = if action == "invalidate" {
46            Some(
47                ctx.resolved_path("path")
48                    .ok_or_else(|| {
49                        ErrorData::invalid_params("path is required for invalidate", None)
50                    })?
51                    .to_string(),
52            )
53        } else {
54            None
55        };
56
57        let cache = ctx.cache.as_ref().unwrap();
58        let mut guard = tokio::task::block_in_place(|| cache.blocking_write());
59
60        let result = match action.as_str() {
61            "status" => {
62                let entries = guard.get_all_entries();
63                if entries.is_empty() {
64                    "Cache empty — no files tracked.".to_string()
65                } else {
66                    let mut lines = vec![format!("Cache: {} file(s)", entries.len())];
67                    for (path, entry) in &entries {
68                        let fref = guard
69                            .file_ref_map()
70                            .get(*path)
71                            .map_or("F?", std::string::String::as_str);
72                        lines.push(format!(
73                            "  {fref}={} [{}L, {}t, read {}x]",
74                            crate::core::protocol::shorten_path(path),
75                            entry.line_count,
76                            entry.original_tokens,
77                            entry.read_count
78                        ));
79                    }
80                    lines.join("\n")
81                }
82            }
83            "clear" => {
84                let count = guard.clear();
85                format!(
86                    "Cache cleared — {count} file(s) removed. Next ctx_read will return full content."
87                )
88            }
89            "invalidate" => {
90                let Some(path) = invalidate_path else {
91                    return Ok(ToolOutput::simple(
92                        "Missing path for invalidate action.".to_string(),
93                    ));
94                };
95                if guard.invalidate(&path) {
96                    format!(
97                        "Invalidated cache for {}. Next ctx_read will return full content.",
98                        crate::core::protocol::shorten_path(&path)
99                    )
100                } else {
101                    format!(
102                        "{} was not in cache.",
103                        crate::core::protocol::shorten_path(&path)
104                    )
105                }
106            }
107            _ => "Unknown action. Use: status, clear, invalidate".to_string(),
108        };
109
110        Ok(ToolOutput {
111            text: result,
112            original_tokens: 0,
113            saved_tokens: 0,
114            mode: Some(action),
115            path: None,
116        })
117    }
118}
lean_ctx/tools/registered/ctx_cache.rs

lean_ctx/tools/registered/
ctx_cache.rs
