use rmcp::model::Tool;
use rmcp::ErrorData;
use serde_json::{json, Map, Value};
use crate::server::tool_trait::{get_bool, get_str, McpTool, ToolContext, ToolOutput};
use crate::tool_defs::tool_def;
pub struct CtxAgentTool;
impl McpTool for CtxAgentTool {
fn name(&self) -> &'static str {
"ctx_agent"
}
fn tool_def(&self) -> Tool {
tool_def(
"ctx_agent",
"Multi-agent coordination (shared message bus + persistent diaries). Actions: register (join with agent_type+role), \
post (broadcast or direct message with category), read (poll messages), status (update state: active|idle|finished), \
handoff (transfer task to another agent with summary), sync (overview of all agents + pending messages + shared contexts), \
diary (log discovery/decision/blocker/progress/insight — persisted across sessions), \
recall_diary (read agent diary), diaries (list all agent diaries), \
list, info.",
json!({
"type": "object",
"properties": {
"action": {
"type": "string",
"enum": ["register", "list", "post", "read", "status", "info", "handoff", "sync", "diary", "recall_diary", "diaries", "share_knowledge", "receive_knowledge"],
"description": "Agent operation."
},
"agent_type": {
"type": "string",
"description": "Agent type for register (cursor, claude, codex, gemini, crush, subagent)"
},
"role": {
"type": "string",
"description": "Agent role (dev, review, test, plan)"
},
"message": {
"type": "string",
"description": "Message text for post action, or status detail for status action"
},
"category": {
"type": "string",
"description": "Message category for post (finding, warning, request, status)"
},
"to_agent": {
"type": "string",
"description": "Target agent ID for direct message (omit for broadcast)"
},
"status": {
"type": "string",
"enum": ["active", "idle", "finished"],
"description": "New status for status action"
}
},
"required": ["action"]
}),
)
}
fn handle(
&self,
args: &Map<String, Value>,
ctx: &ToolContext,
) -> Result<ToolOutput, ErrorData> {
let action = get_str(args, "action")
.ok_or_else(|| ErrorData::invalid_params("action is required", None))?;
let agent_type = get_str(args, "agent_type");
let role = get_str(args, "role");
let message = get_str(args, "message");
let category = get_str(args, "category");
let to_agent = get_str(args, "to_agent");
let status = get_str(args, "status");
let privacy = get_str(args, "privacy");
let priority = get_str(args, "priority");
let ttl_hours: Option<u64> = args.get("ttl_hours").and_then(serde_json::Value::as_u64);
let format = get_str(args, "format");
let write = get_bool(args, "write").unwrap_or(false);
let filename = get_str(args, "filename");
let project_root = ctx.project_root.clone();
let agent_id_handle = ctx.agent_id.as_ref().unwrap();
let current_agent_id = {
let guard = agent_id_handle.blocking_read();
guard.clone()
};
let result = crate::tools::ctx_agent::handle(
&action,
agent_type.as_deref(),
role.as_deref(),
&project_root,
current_agent_id.as_deref(),
message.as_deref(),
category.as_deref(),
to_agent.as_deref(),
status.as_deref(),
privacy.as_deref(),
priority.as_deref(),
ttl_hours,
format.as_deref(),
write,
filename.as_deref(),
);
if action == "register" {
if let Some(id) = result.split(':').nth(1) {
let id = id.split_whitespace().next().unwrap_or("").to_string();
if !id.is_empty() {
let mut guard = agent_id_handle.blocking_write();
*guard = Some(id);
}
}
let agent_role =
crate::core::agents::AgentRole::from_str_loose(role.as_deref().unwrap_or("coder"));
let depth = crate::core::agents::ContextDepthConfig::for_role(agent_role);
let depth_hint = format!(
"\n[context] role={:?} preferred_mode={} max_full={} max_sig={} budget_ratio={:.0}%",
agent_role,
depth.preferred_mode,
depth.max_files_full,
depth.max_files_signatures,
depth.context_budget_ratio * 100.0,
);
return Ok(ToolOutput {
text: format!("{result}{depth_hint}"),
original_tokens: 0,
saved_tokens: 0,
mode: Some(action),
path: None,
});
}
Ok(ToolOutput {
text: result,
original_tokens: 0,
saved_tokens: 0,
mode: Some(action),
path: None,
})
}
}