lean_ctx/tool_defs/
mod.rs

1use std::sync::Arc;
2
3use rmcp::model::Tool;
4use serde_json::{Map, Value};
5
6mod granular;
7pub use granular::{granular_tool_defs, list_all_tool_defs, unified_tool_defs};
8
9pub fn tool_def(name: &'static str, description: &'static str, schema_value: Value) -> Tool {
10    let schema: Map<String, Value> = match schema_value {
11        Value::Object(map) => map,
12        _ => Map::new(),
13    };
14    Tool::new(name, description, Arc::new(schema))
15}
16
17pub const CORE_TOOL_NAMES: &[&str] = &[
18    "ctx_read",
19    "ctx_search",
20    "ctx_shell",
21    "ctx_tree",
22    "ctx_edit",
23    "ctx_session",
24    "ctx_knowledge",
25    "ctx_overview",
26    "ctx_graph",
27    "ctx_call",
28    "ctx_provider",
29    "ctx_expand",
30];
31
32pub fn core_tool_names() -> &'static [&'static str] {
33    CORE_TOOL_NAMES
34}
35
36pub fn lazy_tool_defs() -> Vec<Tool> {
37    let all = granular_tool_defs();
38    all.into_iter()
39        .filter(|t| CORE_TOOL_NAMES.contains(&t.name.as_ref()))
40        .collect()
41}
42
43pub fn discover_tools(query: &str) -> String {
44    let all = list_all_tool_defs();
45    let query_lower = query.to_lowercase();
46    let matches: Vec<(&str, &str)> = all
47        .iter()
48        .filter(|(name, desc, _)| {
49            name.to_lowercase().contains(&query_lower) || desc.to_lowercase().contains(&query_lower)
50        })
51        .map(|(name, desc, _)| (*name, *desc))
52        .collect();
53
54    if matches.is_empty() {
55        return format!("No tools found matching '{query}'. Try broader terms like: graph, cost, session, search, compress, agent, workflow, gain.");
56    }
57
58    let mut out = format!("{} tools matching '{query}':\n", matches.len());
59    for (name, desc) in &matches {
60        let short = if desc.len() > 80 {
61            &desc[..desc.floor_char_boundary(80)]
62        } else {
63            desc
64        };
65        out.push_str(&format!("  {name} — {short}\n"));
66    }
67    out.push_str(
68        "\nIf your MCP client registers tools only once at startup (static tools/list), \
69use ctx_call (available in lazy mode) to invoke discovered tools:\n\
70  ctx_call {\"name\":\"ctx_graph\",\"arguments\":{\"action\":\"status\"}}\n",
71    );
72    out
73}
74
75pub fn is_full_mode() -> bool {
76    std::env::var("LEAN_CTX_FULL_TOOLS").is_ok_and(|v| v != "0" && !v.eq_ignore_ascii_case("false"))
77        || std::env::var("LEAN_CTX_LAZY_TOOLS")
78            .is_ok_and(|v| v == "0" || v.eq_ignore_ascii_case("false"))
79}
lean_ctx/tool_defs/mod.rs

lean_ctx/tool_defs/
mod.rs
