use rmcp::ErrorData;
use rmcp::model::Tool;
use serde_json::{Map, Value, json};
use crate::server::tool_trait::{McpTool, ToolContext, ToolOutput};
use crate::tool_defs::tool_def;
pub struct CtxExpandTool;
impl McpTool for CtxExpandTool {
fn name(&self) -> &'static str {
"ctx_expand"
}
fn tool_def(&self) -> Tool {
tool_def(
"ctx_expand",
"Retrieve archived tool output by ID (e.g. id=@F1 from [Archived:ID] hints).\n\
WORKFLOW: see [Archived:ID] → ctx_expand id=ID to restore full content.\n\
Supports head/tail/search to filter lines and save tokens on re-read.\n\
action=list browses all archives. action=search_all queries across archives.\n\
Zero-loss: original preserved.\n\
NO MCP? The same bytes are a real file — every [Archived]/tee/firewall hint\n\
shows its on-disk path; read that path directly with any tool instead.\n\
ANTIPATTERN: not for reading project files — use ctx_read or ctx_compose.",
json!({
"type": "object",
"properties": {
"id": { "type": "string", "description": "Archive ID or @F1 ref" },
"action": { "type": "string", "description": "retrieve|list|search_all" },
"start_line": { "type": "integer", "description": "1-based start line" },
"end_line": { "type": "integer", "description": "1-based end line" },
"head": { "type": "integer", "description": "First N lines" },
"tail": { "type": "integer", "description": "Last N lines" },
"search": { "type": "string", "description": "Lines matching substring" },
"json_keys": { "type": "boolean", "description": "List JSON keys" },
"json_path": { "type": "string", "description": "JSON path, e.g. data.items.0" },
"query": { "type": "string", "description": "search_all query" },
"session_id": { "type": "string", "description": "Filter by session ID" }
}
}),
)
}
fn handle(
&self,
args: &Map<String, Value>,
_ctx: &ToolContext,
) -> Result<ToolOutput, ErrorData> {
let args_val = Value::Object(args.clone());
let result = crate::tools::ctx_expand::handle(&args_val);
Ok(ToolOutput::simple(result))
}
}