Function worker_submit

ds4_agent.c:8163–8184

Submit one user turn if the worker is idle. Busy submissions are rejected so * the UI can keep the typed text editable instead of silently queueing it. */

    ds4_tokens_free(&t);
    return id;
}

/* Pick a recent verbatim tail for the compacted transcript.  Prefer a user
 * boundary inside the budget so the rebuilt context starts at a natural turn. */
static int agent_compact_tail_start(agent_worker *w, int bottom, int sys_len) {
    int ctx = agent_worker_effective_ctx_size(w);
    int tail_budget = ctx / AGENT_COMPACT_TAIL_DIVISOR;
    if (tail_budget > AGENT_COMPACT_TAIL_CAP_TOKENS)
        tail_budget = AGENT_COMPACT_TAIL_CAP_TOKENS;
    if (tail_budget < 1) tail_budget = 1;

    int target = bottom - tail_budget;
    if (target < sys_len) target = sys_len;

    int user_id = agent_special_token_id(w->engine,
        ds4_engine_is_glm_dsa(w->engine) ? "<|user|>" : "<｜User｜>");
    if (user_id < 0) return target;

    for (int i = target; i < bottom; i++) {
        if (w->transcript.v[i] == user_id) return i;
    }
    return target;
}

static void agent_tokens_append_range(ds4_tokens *dst, const ds4_tokens *src,