lean_ctx/tools/registered/
ctx_graph.rs

1use rmcp::ErrorData;
2use rmcp::model::Tool;
3use serde_json::{Map, Value, json};
4
5use crate::server::tool_trait::{McpTool, ToolContext, ToolOutput, get_str, get_usize};
6use crate::tool_defs::tool_def;
7
8pub struct CtxGraphTool;
9
10impl McpTool for CtxGraphTool {
11    fn name(&self) -> &'static str {
12        "ctx_graph"
13    }
14
15    fn tool_def(&self) -> Tool {
16        tool_def(
17            "ctx_graph",
18            "File-level dependency graph queries.\n\
19             action=symbol path=\"file.rs::fnName\" returns the DEFINITION (not usages — \
20             use ctx_search for references). neighbors=imports±direction, \
21             impact=reverse-dep blast radius, path from→to=dependency chain, \
22             diff since=HEAD~1=git change impact, diagram kind=deps|calls (Mermaid).\n\
23             For understanding code use ctx_compose FIRST.",
24            json!({
25                "type": "object",
26                "properties": {
27                    "action": {
28                        "type": "string",
29                        "description": "build|related|symbol|impact|status|enrich|context|diagram|neighbors|path|explain|diff"
30                    },
31                    "path": {
32                        "type": "string",
33                        "description": "Path; file::symbol for symbol action"
34                    },
35                    "to": { "type": "string", "description": "Target file (action=path)" },
36                    "depth": { "type": "integer" },
37                    "kind": { "type": "string", "description": "diagram: deps|calls" },
38                    "format": { "type": "string", "description": "text|json" },
39                    "since": { "type": "string", "description": "Git ref (default HEAD~1)" },
40                    "project_root": { "type": "string" }
41                },
42                "required": ["action"]
43            }),
44        )
45    }
46
47    fn handle(
48        &self,
49        args: &Map<String, Value>,
50        ctx: &ToolContext,
51    ) -> Result<ToolOutput, ErrorData> {
52        let action = get_str(args, "action")
53            .ok_or_else(|| ErrorData::invalid_params("action is required", None))?;
54
55        let path = if action == "diagram" {
56            get_str(args, "path")
57        } else if let Some(p) = ctx.resolved_path("path") {
58            Some(p.to_string())
59        } else if let Some(err) = ctx
60            .path_error("path")
61            .filter(|_| get_str(args, "path").is_some())
62        {
63            return Err(ErrorData::invalid_params(format!("path: {err}"), None));
64        } else {
65            None
66        };
67
68        let root = if let Some(p) = ctx.resolved_path("project_root") {
69            p.to_string()
70        } else if let Some(err) = ctx.path_error("project_root") {
71            return Err(ErrorData::invalid_params(
72                format!("project_root: {err}"),
73                None,
74            ));
75        } else {
76            ctx.project_root.clone()
77        };
78        let depth = get_usize(args, "depth").map(|d| d.min(64));
79        let kind = get_str(args, "kind");
80        let format = get_str(args, "format");
81        // `since` is a git ref, not a filesystem path — read it raw (no PathJail).
82        let since = get_str(args, "since");
83        let to = if let Some(p) = ctx.resolved_path("to") {
84            Some(p.to_string())
85        } else if let Some(err) = ctx
86            .path_error("to")
87            .filter(|_| get_str(args, "to").is_some())
88        {
89            return Err(ErrorData::invalid_params(format!("to: {err}"), None));
90        } else {
91            None
92        };
93
94        let cache = ctx
95            .cache
96            .as_ref()
97            .ok_or_else(|| ErrorData::internal_error("cache not available", None))?;
98        let Some(mut guard) = crate::server::bounded_lock::write(cache, "ctx_graph") else {
99            return Ok(ToolOutput::simple(
100                "[graph cache temporarily unavailable — retry in a moment]".to_string(),
101            ));
102        };
103        let result = crate::tools::ctx_graph::handle(
104            &action,
105            path.as_deref(),
106            &root,
107            &mut guard,
108            ctx.crp_mode,
109            depth,
110            kind.as_deref(),
111            to.as_deref(),
112            format.as_deref(),
113            since.as_deref(),
114        );
115
116        Ok(ToolOutput {
117            text: result,
118            original_tokens: 0,
119            saved_tokens: 0,
120            mode: Some(action),
121            path: None,
122            changed: false,
123            shell_outcome: None,
124        })
125    }
126}
lean_ctx/tools/registered/ctx_graph.rs

lean_ctx/tools/registered/
ctx_graph.rs
