Function tool_memory_prune_locked

ds4_server.c:7874–7880

        const char *close = strstr(raw + st->emit_pos, "</think>");
        const char *tool = r->has_tools ?
            find_any_tool_start(raw + st->emit_pos) : NULL;
        const bool tool_before_close = tool && (!close || tool < close);
        const bool complete_tool =
            tool_before_close && find_any_tool_end(tool) != NULL;
        size_t limit;
        if (tool_before_close) {
            limit = trim_tool_separator_ws(raw, st->emit_pos,
                                           (size_t)(tool - raw));
        } else if (close) {