Function tool_memory_remove_entry_locked

ds4_server.c:7858–7872

             * happen to repeat `<think>` we skip it; otherwise start from
             * position 0. The earlier "no-think-prefix => switch to TEXT"
             * shortcut here was incorrect: it leaked reasoning to clients as
             * regular output_text because the model was already inside the
             * think block when it produced its first token. The actual
             * mode change to TEXT happens only when `</think>` is observed. */
            const char *open = "<think>";
            const size_t open_len = strlen(open);
            if (raw_len < open_len && !strncmp(raw, open, raw_len) && !final) {
                return true;
            }
            if (raw_len >= open_len && !strncmp(raw, open, open_len)) {
                st->emit_pos = open_len;
            }
            st->checked_think_prefix = true;
        }

        const char *close = strstr(raw + st->emit_pos, "</think>");
        const char *tool = r->has_tools ?
            find_any_tool_start(raw + st->emit_pos) : NULL;