Function request_ctx_span

ds4_server.c:9337–9341

    if (wanted.len == 0) return;
    /* Tool replay payloads are stored next to KV checkpoints; keep them model
     * scoped too, since token positions and graph state are not portable across
     * Flash/Pro shapes even when the rendered chat text is identical. */
    uint8_t model_id = s->engine ? (uint8_t)ds4_engine_model_id(s->engine) : 0;

    DIR *d = opendir(s->kv.dir);
    if (!d) {
        id_list_free(&wanted);
        return;