pikuri-lsp lets a pikuri agent ask a real language server the questions grep cannot answer: where is this defined, who calls it, what does it inherit from. It speaks LSP over a long-lived stdio child (+Pikuri::Lsp::Connection+ owns the JSON-RPC framing, the id demux and the reply to server-initiated requests) and models coordinates once, at the wire boundary, in +Pikuri::Lsp::Position+ / +Range+ / +Location+. Read-only by construction: no formatting, no code actions, no rename, no workspace edits. It reads what the server says and reports it.