[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
if (*p != ':') {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    p++;
                    if (!strcmp(ckey, "type")) {
                        char *choice = NULL;
                        if (!json_string(&p, &choice)) {
                            free(ckey);
                            free(key);
                            goto bad;
                        }
                        tool_choice_none = !strcmp(choice, "none");
                        free(choice);
                    } else if (!json_skip_value(&p)) {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    free(ckey);
                    json_ws(&p);
                    if (*p == ',') p++;
                    json_ws(&p);
                }
                if (*p != '}') {
                    free(key);
                    goto bad;
                }
                p++;
            } else if (!json_skip_value(&p)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "model")) {
            free(r->model);
            if (!json_string(&p, &r->model)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "max_tokens")) {
            if (!json_int(&p, &r->max_tokens)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "temperature")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->temperature = (float)v;
        } else if (!strcmp(key, "top_p")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->top_p = (float)v;
        } else if (!strcmp(key, "top_k")) {
            if (!json_int(&p, &r->top_k)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stream")) {
            if (!json_bool(&p, &r->stream)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stop_sequences")) {
            if (!parse_stop(&p, &r->stops)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
if (*p != ':') {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    p++;
                    if (!strcmp(ckey, "type")) {
                        char *choice = NULL;
                        if (!json_string(&p, &choice)) {
                            free(ckey);
                            free(key);
                            goto bad;
                        }
                        tool_choice_none = !strcmp(choice, "none");
                        free(choice);
                    } else if (!json_skip_value(&p)) {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    free(ckey);
                    json_ws(&p);
                    if (*p == ',') p++;
                    json_ws(&p);
                }
                if (*p != '}') {
                    free(key);
                    goto bad;
                }
                p++;
            } else if (!json_skip_value(&p)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "model")) {
            free(r->model);
            if (!json_string(&p, &r->model)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "max_tokens")) {
            if (!json_int(&p, &r->max_tokens)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "temperature")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->temperature = (float)v;
        } else if (!strcmp(key, "top_p")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->top_p = (float)v;
        } else if (!strcmp(key, "top_k")) {
            if (!json_int(&p, &r->top_k)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stream")) {
            if (!json_bool(&p, &r->stream)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stop_sequences")) {
            if (!parse_stop(&p, &r->stops)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
if (*p != ':') {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    p++;
                    if (!strcmp(ckey, "type")) {
                        char *choice = NULL;
                        if (!json_string(&p, &choice)) {
                            free(ckey);
                            free(key);
                            goto bad;
                        }
                        tool_choice_none = !strcmp(choice, "none");
                        free(choice);
                    } else if (!json_skip_value(&p)) {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    free(ckey);
                    json_ws(&p);
                    if (*p == ',') p++;
                    json_ws(&p);
                }
                if (*p != '}') {
                    free(key);
                    goto bad;
                }
                p++;
            } else if (!json_skip_value(&p)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "model")) {
            free(r->model);
            if (!json_string(&p, &r->model)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "max_tokens")) {
            if (!json_int(&p, &r->max_tokens)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "temperature")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->temperature = (float)v;
        } else if (!strcmp(key, "top_p")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->top_p = (float)v;
        } else if (!strcmp(key, "top_k")) {
            if (!json_int(&p, &r->top_k)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stream")) {
            if (!json_bool(&p, &r->stream)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stop_sequences")) {
            if (!parse_stop(&p, &r->stops)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
if (*p != ':') {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    p++;
                    if (!strcmp(ckey, "type")) {
                        char *choice = NULL;
                        if (!json_string(&p, &choice)) {
                            free(ckey);
                            free(key);
                            goto bad;
                        }
                        tool_choice_none = !strcmp(choice, "none");
                        free(choice);
                    } else if (!json_skip_value(&p)) {
                        free(ckey);
                        free(key);
                        goto bad;
                    }
                    free(ckey);
                    json_ws(&p);
                    if (*p == ',') p++;
                    json_ws(&p);
                }
                if (*p != '}') {
                    free(key);
                    goto bad;
                }
                p++;
            } else if (!json_skip_value(&p)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "model")) {
            free(r->model);
            if (!json_string(&p, &r->model)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "max_tokens")) {
            if (!json_int(&p, &r->max_tokens)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "temperature")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->temperature = (float)v;
        } else if (!strcmp(key, "top_p")) {
            double v = 0.0;
            if (!json_number(&p, &v)) {
                free(key);
                goto bad;
            }
            r->top_p = (float)v;
        } else if (!strcmp(key, "top_k")) {
            if (!json_int(&p, &r->top_k)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stream")) {
            if (!json_bool(&p, &r->stream)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "stop_sequences")) {
            if (!parse_stop(&p, &r->stops)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
                goto bad;
            }
            got_thinking = true;
        } else if (!strcmp(key, "output_config")) {
            if (!parse_output_config_effort(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "reasoning_effort")) {
            if (!parse_reasoning_effort_value(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!json_skip_value(&p)) {
            free(key);
            goto bad;
        }
        free(key);
        json_ws(&p);
        if (*p == ',') p++;
        json_ws(&p);
    }
    if (*p != '}') goto bad;
    if (!got_messages) {
        snprintf(err, errlen, "missing messages");
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    if (system && system[0]) {
        chat_msg msg = {0};
        msg.role = xstrdup("system");
        msg.content = system;
        system = NULL;
        chat_msgs_push(&msgs, msg);
    }
    r->has_tools = tool_schemas && tool_schemas[0] && !tool_choice_none;
    if (!got_thinking && model_alias_disables_thinking(r->model)) thinking_enabled = false;
    if (!got_thinking && model_alias_enables_thinking(r->model)) thinking_enabled = true;
    r->think_mode = ds4_think_mode_for_context(
        think_mode_from_enabled(thinking_enabled, reasoning_effort), ctx_size);
    if (!anthropic_validate_tool_results(s, &msgs,
                                         &r->anthropic_requires_live_tool_state,
                                         err, errlen))
    {
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    kv_cache_restore_tool_memory_for_messages(s, &msgs);
    tool_memory_attach_to_messages(s, &msgs, &r->tool_replay);
    anthropic_prepare_live_continuation(r, &msgs);
    const char *active_tool_schemas = r->has_tools ? tool_schemas : NULL;
    r->prompt_preserves_reasoning =
        chat_history_uses_tool_context(&msgs, active_tool_schemas);
    r->prompt_text = render_chat_prompt_text(&msgs, active_tool_schemas,
                                             &r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
                goto bad;
            }
            got_thinking = true;
        } else if (!strcmp(key, "output_config")) {
            if (!parse_output_config_effort(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "reasoning_effort")) {
            if (!parse_reasoning_effort_value(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!json_skip_value(&p)) {
            free(key);
            goto bad;
        }
        free(key);
        json_ws(&p);
        if (*p == ',') p++;
        json_ws(&p);
    }
    if (*p != '}') goto bad;
    if (!got_messages) {
        snprintf(err, errlen, "missing messages");
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    if (system && system[0]) {
        chat_msg msg = {0};
        msg.role = xstrdup("system");
        msg.content = system;
        system = NULL;
        chat_msgs_push(&msgs, msg);
    }
    r->has_tools = tool_schemas && tool_schemas[0] && !tool_choice_none;
    if (!got_thinking && model_alias_disables_thinking(r->model)) thinking_enabled = false;
    if (!got_thinking && model_alias_enables_thinking(r->model)) thinking_enabled = true;
    r->think_mode = ds4_think_mode_for_context(
        think_mode_from_enabled(thinking_enabled, reasoning_effort), ctx_size);
    if (!anthropic_validate_tool_results(s, &msgs,
                                         &r->anthropic_requires_live_tool_state,
                                         err, errlen))
    {
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    kv_cache_restore_tool_memory_for_messages(s, &msgs);
    tool_memory_attach_to_messages(s, &msgs, &r->tool_replay);
    anthropic_prepare_live_continuation(r, &msgs);
    const char *active_tool_schemas = r->has_tools ? tool_schemas : NULL;
    r->prompt_preserves_reasoning =
        chat_history_uses_tool_context(&msgs, active_tool_schemas);
    r->prompt_text = render_chat_prompt_text(&msgs, active_tool_schemas,
                                             &r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
                goto bad;
            }
            got_thinking = true;
        } else if (!strcmp(key, "output_config")) {
            if (!parse_output_config_effort(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "reasoning_effort")) {
            if (!parse_reasoning_effort_value(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!json_skip_value(&p)) {
            free(key);
            goto bad;
        }
        free(key);
        json_ws(&p);
        if (*p == ',') p++;
        json_ws(&p);
    }
    if (*p != '}') goto bad;
    if (!got_messages) {
        snprintf(err, errlen, "missing messages");
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    if (system && system[0]) {
        chat_msg msg = {0};
        msg.role = xstrdup("system");
        msg.content = system;
        system = NULL;
        chat_msgs_push(&msgs, msg);
    }
    r->has_tools = tool_schemas && tool_schemas[0] && !tool_choice_none;
    if (!got_thinking && model_alias_disables_thinking(r->model)) thinking_enabled = false;
    if (!got_thinking && model_alias_enables_thinking(r->model)) thinking_enabled = true;
    r->think_mode = ds4_think_mode_for_context(
        think_mode_from_enabled(thinking_enabled, reasoning_effort), ctx_size);
    if (!anthropic_validate_tool_results(s, &msgs,
                                         &r->anthropic_requires_live_tool_state,
                                         err, errlen))
    {
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    kv_cache_restore_tool_memory_for_messages(s, &msgs);
    tool_memory_attach_to_messages(s, &msgs, &r->tool_replay);
    anthropic_prepare_live_continuation(r, &msgs);
    const char *active_tool_schemas = r->has_tools ? tool_schemas : NULL;
    r->prompt_preserves_reasoning =
        chat_history_uses_tool_context(&msgs, active_tool_schemas);
    r->prompt_text = render_chat_prompt_text(&msgs, active_tool_schemas,
                                             &r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
goto bad;
            }
        } else if (!strcmp(key, "thinking")) {
            if (!parse_thinking_control_value(&p, &thinking_enabled)) {
                free(key);
                goto bad;
            }
            got_thinking = true;
        } else if (!strcmp(key, "output_config")) {
            if (!parse_output_config_effort(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!strcmp(key, "reasoning_effort")) {
            if (!parse_reasoning_effort_value(&p, &reasoning_effort)) {
                free(key);
                goto bad;
            }
        } else if (!json_skip_value(&p)) {
            free(key);
            goto bad;
        }
        free(key);
        json_ws(&p);
        if (*p == ',') p++;
        json_ws(&p);
    }
    if (*p != '}') goto bad;
    if (!got_messages) {
        snprintf(err, errlen, "missing messages");
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    if (system && system[0]) {
        chat_msg msg = {0};
        msg.role = xstrdup("system");
        msg.content = system;
        system = NULL;
        chat_msgs_push(&msgs, msg);
    }
    r->has_tools = tool_schemas && tool_schemas[0] && !tool_choice_none;
    if (!got_thinking && model_alias_disables_thinking(r->model)) thinking_enabled = false;
    if (!got_thinking && model_alias_enables_thinking(r->model)) thinking_enabled = true;
    r->think_mode = ds4_think_mode_for_context(
        think_mode_from_enabled(thinking_enabled, reasoning_effort), ctx_size);
    if (!anthropic_validate_tool_results(s, &msgs,
                                         &r->anthropic_requires_live_tool_state,
                                         err, errlen))
    {
        chat_msgs_free(&msgs);
        free(system);
        free(tool_schemas);
        request_free(r);
        return false;
    }
    kv_cache_restore_tool_memory_for_messages(s, &msgs);
    tool_memory_attach_to_messages(s, &msgs, &r->tool_replay);
    anthropic_prepare_live_continuation(r, &msgs);
    const char *active_tool_schemas = r->has_tools ? tool_schemas : NULL;
    r->prompt_preserves_reasoning =
        chat_history_uses_tool_context(&msgs, active_tool_schemas);
    r->prompt_text = render_chat_prompt_text(&msgs, active_tool_schemas,
                                             &r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
&r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    return true;
bad:
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    snprintf(err, errlen, "invalid JSON request");
    request_free(r);
    return false;
}

/* Responses API: convert a content-array item (input_text/output_text/text) into a
 * concatenated string. Strict shape check: bare string, null, or an array of
 * recognized text blocks. Numbers / objects / arrays-of-primitives at the top
 * level all reject so the client sees a 400 instead of an answer built on
 * silently dropped context. */
static bool parse_responses_content_array(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        return false;
    }
    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            char *type = NULL;
            char *text = NULL;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) {
                    free(type);
                    free(text);
                    goto fail;
                }
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "type")) {
                    free(type);
                    if (!json_string(p, &type)) {
                        free(key);
                        free(text);
                        goto fail;
                    }
                } else if (!strcmp(key, "text")) {
                    free(text);
                    /* The text field of a typed content block is a plain JSON
                     * string. Accept null as the empty string for parity with
                     * upstream serializers that emit null for empty blocks. */
                    json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
&r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    return true;
bad:
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    snprintf(err, errlen, "invalid JSON request");
    request_free(r);
    return false;
}

/* Responses API: convert a content-array item (input_text/output_text/text) into a
 * concatenated string. Strict shape check: bare string, null, or an array of
 * recognized text blocks. Numbers / objects / arrays-of-primitives at the top
 * level all reject so the client sees a 400 instead of an answer built on
 * silently dropped context. */
static bool parse_responses_content_array(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        return false;
    }
    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            char *type = NULL;
            char *text = NULL;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) {
                    free(type);
                    free(text);
                    goto fail;
                }
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "type")) {
                    free(type);
                    if (!json_string(p, &type)) {
                        free(key);
                        free(text);
                        goto fail;
                    }
                } else if (!strcmp(key, "text")) {
                    free(text);
                    /* The text field of a typed content block is a plain JSON
                     * string. Accept null as the empty string for parity with
                     * upstream serializers that emit null for empty blocks. */
                    json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
&r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    return true;
bad:
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    snprintf(err, errlen, "invalid JSON request");
    request_free(r);
    return false;
}

/* Responses API: convert a content-array item (input_text/output_text/text) into a
 * concatenated string. Strict shape check: bare string, null, or an array of
 * recognized text blocks. Numbers / objects / arrays-of-primitives at the top
 * level all reject so the client sees a 400 instead of an answer built on
 * silently dropped context. */
static bool parse_responses_content_array(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        return false;
    }
    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            char *type = NULL;
            char *text = NULL;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) {
                    free(type);
                    free(text);
                    goto fail;
                }
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "type")) {
                    free(type);
                    if (!json_string(p, &type)) {
                        free(key);
                        free(text);
                        goto fail;
                    }
                } else if (!strcmp(key, "text")) {
                    free(text);
                    /* The text field of a typed content block is a plain JSON
                     * string. Accept null as the empty string for parity with
                     * upstream serializers that emit null for empty blocks. */
                    json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
&r->tool_orders, r->think_mode);
    ds4_tokenize_rendered_chat(e, r->prompt_text, &r->prompt);
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    return true;
bad:
    chat_msgs_free(&msgs);
    free(system);
    free(tool_schemas);
    snprintf(err, errlen, "invalid JSON request");
    request_free(r);
    return false;
}

/* Responses API: convert a content-array item (input_text/output_text/text) into a
 * concatenated string. Strict shape check: bare string, null, or an array of
 * recognized text blocks. Numbers / objects / arrays-of-primitives at the top
 * level all reject so the client sees a 400 instead of an answer built on
 * silently dropped context. */
static bool parse_responses_content_array(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        return false;
    }
    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            char *type = NULL;
            char *text = NULL;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) {
                    free(type);
                    free(text);
                    goto fail;
                }
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "type")) {
                    free(type);
                    if (!json_string(p, &type)) {
                        free(key);
                        free(text);
                        goto fail;
                    }
                } else if (!strcmp(key, "text")) {
                    free(text);
                    /* The text field of a typed content block is a plain JSON
                     * string. Accept null as the empty string for parity with
                     * upstream serializers that emit null for empty blocks. */
                    json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
p = json ? json : "null";
    json_ws(&p);
    const char *start = p;
    if (!json_skip_value(&p)) return xstrdup(json ? json : "null");
    const char *end = p;

    buf b = {0};
    bool in_string = false;
    bool escape = false;
    for (const char *s = start; s < end; s++) {
        unsigned char c = (unsigned char)*s;
        if (in_string) {
            buf_putc(&b, (char)c);
            if (escape) escape = false;
            else if (c == '\\') escape = true;
            else if (c == '"') in_string = false;
        } else if (c == '"') {
            in_string = true;
            buf_putc(&b, (char)c);
        } else if (!isspace(c)) {
            buf_putc(&b, (char)c);
        }
    }
    return buf_take(&b);
}

static bool json_content(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        if (!json_skip_value(p)) return false;
        *out = xstrdup("");
        return true;
    }

    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) goto fail;
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "text")) {
                    char *s = NULL;
                    if (!json_string(p, &s)) {
                        free(key);
                        goto fail;
                    }
                    buf_puts(&b, s);
                    free(s);
                } else if (!json_skip_value(p)) {
                    free(key);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') goto fail;
            (*p)++;
        } else if (!json_skip_value(p)) {
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

typedef enum {
    REQ_CHAT,
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
p = json ? json : "null";
    json_ws(&p);
    const char *start = p;
    if (!json_skip_value(&p)) return xstrdup(json ? json : "null");
    const char *end = p;

    buf b = {0};
    bool in_string = false;
    bool escape = false;
    for (const char *s = start; s < end; s++) {
        unsigned char c = (unsigned char)*s;
        if (in_string) {
            buf_putc(&b, (char)c);
            if (escape) escape = false;
            else if (c == '\\') escape = true;
            else if (c == '"') in_string = false;
        } else if (c == '"') {
            in_string = true;
            buf_putc(&b, (char)c);
        } else if (!isspace(c)) {
            buf_putc(&b, (char)c);
        }
    }
    return buf_take(&b);
}

static bool json_content(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        if (!json_skip_value(p)) return false;
        *out = xstrdup("");
        return true;
    }

    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) goto fail;
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "text")) {
                    char *s = NULL;
                    if (!json_string(p, &s)) {
                        free(key);
                        goto fail;
                    }
                    buf_puts(&b, s);
                    free(s);
                } else if (!json_skip_value(p)) {
                    free(key);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') goto fail;
            (*p)++;
        } else if (!json_skip_value(p)) {
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

typedef enum {
    REQ_CHAT,
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
p = json ? json : "null";
    json_ws(&p);
    const char *start = p;
    if (!json_skip_value(&p)) return xstrdup(json ? json : "null");
    const char *end = p;

    buf b = {0};
    bool in_string = false;
    bool escape = false;
    for (const char *s = start; s < end; s++) {
        unsigned char c = (unsigned char)*s;
        if (in_string) {
            buf_putc(&b, (char)c);
            if (escape) escape = false;
            else if (c == '\\') escape = true;
            else if (c == '"') in_string = false;
        } else if (c == '"') {
            in_string = true;
            buf_putc(&b, (char)c);
        } else if (!isspace(c)) {
            buf_putc(&b, (char)c);
        }
    }
    return buf_take(&b);
}

static bool json_content(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        if (!json_skip_value(p)) return false;
        *out = xstrdup("");
        return true;
    }

    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) goto fail;
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "text")) {
                    char *s = NULL;
                    if (!json_string(p, &s)) {
                        free(key);
                        goto fail;
                    }
                    buf_puts(&b, s);
                    free(s);
                } else if (!json_skip_value(p)) {
                    free(key);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') goto fail;
            (*p)++;
        } else if (!json_skip_value(p)) {
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

typedef enum {
    REQ_CHAT,
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
p = json ? json : "null";
    json_ws(&p);
    const char *start = p;
    if (!json_skip_value(&p)) return xstrdup(json ? json : "null");
    const char *end = p;

    buf b = {0};
    bool in_string = false;
    bool escape = false;
    for (const char *s = start; s < end; s++) {
        unsigned char c = (unsigned char)*s;
        if (in_string) {
            buf_putc(&b, (char)c);
            if (escape) escape = false;
            else if (c == '\\') escape = true;
            else if (c == '"') in_string = false;
        } else if (c == '"') {
            in_string = true;
            buf_putc(&b, (char)c);
        } else if (!isspace(c)) {
            buf_putc(&b, (char)c);
        }
    }
    return buf_take(&b);
}

static bool json_content(const char **p, char **out) {
    json_ws(p);
    if (**p == '"') return json_string(p, out);
    if (json_lit(p, "null")) {
        *out = xstrdup("");
        return true;
    }
    if (**p != '[') {
        if (!json_skip_value(p)) return false;
        *out = xstrdup("");
        return true;
    }

    (*p)++;
    buf b = {0};
    json_ws(p);
    while (**p && **p != ']') {
        if (**p == '"') {
            char *s = NULL;
            if (!json_string(p, &s)) goto fail;
            buf_puts(&b, s);
            free(s);
        } else if (**p == '{') {
            (*p)++;
            json_ws(p);
            while (**p && **p != '}') {
                char *key = NULL;
                if (!json_string(p, &key)) goto fail;
                json_ws(p);
                if (**p != ':') {
                    free(key);
                    goto fail;
                }
                (*p)++;
                if (!strcmp(key, "text")) {
                    char *s = NULL;
                    if (!json_string(p, &s)) {
                        free(key);
                        goto fail;
                    }
                    buf_puts(&b, s);
                    free(s);
                } else if (!json_skip_value(p)) {
                    free(key);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') goto fail;
            (*p)++;
        } else if (!json_skip_value(p)) {
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

typedef enum {
    REQ_CHAT,
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
                        free(key);
                        free(type);
                        goto fail;
                    }
                } else if (!json_skip_value(p)) {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') {
                free(type);
                free(text);
                goto fail;
            }
            (*p)++;
            /* Fail closed: a content object must carry a known text-like type
             * AND a text field. Anything else — missing type, missing text,
             * image/file/audio types, future schema-drift — is rejected so the
             * client gets a 400 instead of an answer built on context the
             * server discarded silently. */
            bool is_text_block = type && (
                !strcmp(type, "input_text") ||
                !strcmp(type, "output_text") ||
                !strcmp(type, "text") ||
                !strcmp(type, "summary_text") ||
                !strcmp(type, "reasoning_text"));
            if (!is_text_block || !text) {
                free(type);
                free(text);
                goto fail;
            }
            buf_puts(&b, text);
            free(type);
            free(text);
        } else {
            /* Reject primitives, arrays-of-arrays, nulls: a content array
             * element must be either a string or a typed text object. */
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

/* Codex /v1/responses input items have a `type` discriminator (message,
 * function_call, function_call_output, reasoning, custom_tool_call,
 * custom_tool_call_output, ...). We collapse them into chat_msgs the same way
 * the chat completion / Anthropic parsers do, so the rest of the engine sees a
 * single conversation history shape.
 *
 * Protocol contract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
                        free(key);
                        free(type);
                        goto fail;
                    }
                } else if (!json_skip_value(p)) {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') {
                free(type);
                free(text);
                goto fail;
            }
            (*p)++;
            /* Fail closed: a content object must carry a known text-like type
             * AND a text field. Anything else — missing type, missing text,
             * image/file/audio types, future schema-drift — is rejected so the
             * client gets a 400 instead of an answer built on context the
             * server discarded silently. */
            bool is_text_block = type && (
                !strcmp(type, "input_text") ||
                !strcmp(type, "output_text") ||
                !strcmp(type, "text") ||
                !strcmp(type, "summary_text") ||
                !strcmp(type, "reasoning_text"));
            if (!is_text_block || !text) {
                free(type);
                free(text);
                goto fail;
            }
            buf_puts(&b, text);
            free(type);
            free(text);
        } else {
            /* Reject primitives, arrays-of-arrays, nulls: a content array
             * element must be either a string or a typed text object. */
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

/* Codex /v1/responses input items have a `type` discriminator (message,
 * function_call, function_call_output, reasoning, custom_tool_call,
 * custom_tool_call_output, ...). We collapse them into chat_msgs the same way
 * the chat completion / Anthropic parsers do, so the rest of the engine sees a
 * single conversation history shape.
 *
 * Protocol contract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
                        free(key);
                        free(type);
                        goto fail;
                    }
                } else if (!json_skip_value(p)) {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') {
                free(type);
                free(text);
                goto fail;
            }
            (*p)++;
            /* Fail closed: a content object must carry a known text-like type
             * AND a text field. Anything else — missing type, missing text,
             * image/file/audio types, future schema-drift — is rejected so the
             * client gets a 400 instead of an answer built on context the
             * server discarded silently. */
            bool is_text_block = type && (
                !strcmp(type, "input_text") ||
                !strcmp(type, "output_text") ||
                !strcmp(type, "text") ||
                !strcmp(type, "summary_text") ||
                !strcmp(type, "reasoning_text"));
            if (!is_text_block || !text) {
                free(type);
                free(text);
                goto fail;
            }
            buf_puts(&b, text);
            free(type);
            free(text);
        } else {
            /* Reject primitives, arrays-of-arrays, nulls: a content array
             * element must be either a string or a typed text object. */
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

/* Codex /v1/responses input items have a `type` discriminator (message,
 * function_call, function_call_output, reasoning, custom_tool_call,
 * custom_tool_call_output, ...). We collapse them into chat_msgs the same way
 * the chat completion / Anthropic parsers do, so the rest of the engine sees a
 * single conversation history shape.
 *
 * Protocol contract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
json_ws(p);
                    if (json_lit(p, "null")) {
                        text = xstrdup("");
                    } else if (!json_string(p, &text)) {
                        free(key);
                        free(type);
                        goto fail;
                    }
                } else if (!json_skip_value(p)) {
                    free(key);
                    free(type);
                    free(text);
                    goto fail;
                }
                free(key);
                json_ws(p);
                if (**p == ',') (*p)++;
                json_ws(p);
            }
            if (**p != '}') {
                free(type);
                free(text);
                goto fail;
            }
            (*p)++;
            /* Fail closed: a content object must carry a known text-like type
             * AND a text field. Anything else — missing type, missing text,
             * image/file/audio types, future schema-drift — is rejected so the
             * client gets a 400 instead of an answer built on context the
             * server discarded silently. */
            bool is_text_block = type && (
                !strcmp(type, "input_text") ||
                !strcmp(type, "output_text") ||
                !strcmp(type, "text") ||
                !strcmp(type, "summary_text") ||
                !strcmp(type, "reasoning_text"));
            if (!is_text_block || !text) {
                free(type);
                free(text);
                goto fail;
            }
            buf_puts(&b, text);
            free(type);
            free(text);
        } else {
            /* Reject primitives, arrays-of-arrays, nulls: a content array
             * element must be either a string or a typed text object. */
            goto fail;
        }
        json_ws(p);
        if (**p == ',') (*p)++;
        json_ws(p);
    }
    if (**p != ']') goto fail;
    (*p)++;
    *out = buf_take(&b);
    return true;
fail:
    buf_free(&b);
    return false;
}

/* Codex /v1/responses input items have a `type` discriminator (message,
 * function_call, function_call_output, reasoning, custom_tool_call,
 * custom_tool_call_output, ...). We collapse them into chat_msgs the same way
 * the chat completion / Anthropic parsers do, so the rest of the engine sees a
 * single conversation history shape.
 *
 * Protocol contract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
tract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
 *     can render plain reasoning summaries/content, but it cannot decrypt
 *     reasoning.encrypted_content.  If live state is unavailable and the replay
 *     only contains visible messages/tool calls, later validation marks it as a
 *     lower-fidelity replay; generate_job() logs that and continues from the
 *     visible transcript rather than killing a recoverable agent session.
 *
 * Reasoning items are merged into the next assistant message so
 * render_chat_prompt_text can wrap them in <think>. */
static bool parse_responses_input(const char **p, chat_msgs *msgs,
                                  buf *loaded_tool_schemas,
                                  tool_schema_orders *orders) {
    json_ws(p);
    if (**p != '[') return false;
    (*p)++;

    buf pending_reasoning = {0};

    json_ws(p);
    while (**p && **p != ']') {
        if (**p != '{') goto fail;
        (*p)++;
        char *type = NULL;
        char *role = NULL;
        char *content = NULL;
        char *name = NULL;
        char *namespace = NULL;
        char *call_id = NULL;
        char *item_id = NULL;
        char *arguments = NULL;
        char *output = NULL;
        char *input_str = NULL;
        char *summary = NULL;
        char *action = NULL;
        char *result = NULL;
        char *tools_json = NULL;
        char *status_str = NULL;
        json_ws(p);
        while (**p && **p != '}') {
            char *key = NULL;
            if (!json_string(p, &key)) goto item_fail;
            json_ws(p);
            if (**p != ':') {
                free(key);
                goto item_fail;
            }
            (*p)++;
            if (!strcmp(key, "type")) {
                free(type);
                if (!json_string(p, &type)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "role")) {
                free(role);
                if (!json_string(p, &role)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "content")) {
                free(content);
                if (!parse_responses_content_array(p, &content)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
tract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
 *     can render plain reasoning summaries/content, but it cannot decrypt
 *     reasoning.encrypted_content.  If live state is unavailable and the replay
 *     only contains visible messages/tool calls, later validation marks it as a
 *     lower-fidelity replay; generate_job() logs that and continues from the
 *     visible transcript rather than killing a recoverable agent session.
 *
 * Reasoning items are merged into the next assistant message so
 * render_chat_prompt_text can wrap them in <think>. */
static bool parse_responses_input(const char **p, chat_msgs *msgs,
                                  buf *loaded_tool_schemas,
                                  tool_schema_orders *orders) {
    json_ws(p);
    if (**p != '[') return false;
    (*p)++;

    buf pending_reasoning = {0};

    json_ws(p);
    while (**p && **p != ']') {
        if (**p != '{') goto fail;
        (*p)++;
        char *type = NULL;
        char *role = NULL;
        char *content = NULL;
        char *name = NULL;
        char *namespace = NULL;
        char *call_id = NULL;
        char *item_id = NULL;
        char *arguments = NULL;
        char *output = NULL;
        char *input_str = NULL;
        char *summary = NULL;
        char *action = NULL;
        char *result = NULL;
        char *tools_json = NULL;
        char *status_str = NULL;
        json_ws(p);
        while (**p && **p != '}') {
            char *key = NULL;
            if (!json_string(p, &key)) goto item_fail;
            json_ws(p);
            if (**p != ':') {
                free(key);
                goto item_fail;
            }
            (*p)++;
            if (!strcmp(key, "type")) {
                free(type);
                if (!json_string(p, &type)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "role")) {
                free(role);
                if (!json_string(p, &role)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "content")) {
                free(content);
                if (!parse_responses_content_array(p, &content)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
tract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
 *     can render plain reasoning summaries/content, but it cannot decrypt
 *     reasoning.encrypted_content.  If live state is unavailable and the replay
 *     only contains visible messages/tool calls, later validation marks it as a
 *     lower-fidelity replay; generate_job() logs that and continues from the
 *     visible transcript rather than killing a recoverable agent session.
 *
 * Reasoning items are merged into the next assistant message so
 * render_chat_prompt_text can wrap them in <think>. */
static bool parse_responses_input(const char **p, chat_msgs *msgs,
                                  buf *loaded_tool_schemas,
                                  tool_schema_orders *orders) {
    json_ws(p);
    if (**p != '[') return false;
    (*p)++;

    buf pending_reasoning = {0};

    json_ws(p);
    while (**p && **p != ']') {
        if (**p != '{') goto fail;
        (*p)++;
        char *type = NULL;
        char *role = NULL;
        char *content = NULL;
        char *name = NULL;
        char *namespace = NULL;
        char *call_id = NULL;
        char *item_id = NULL;
        char *arguments = NULL;
        char *output = NULL;
        char *input_str = NULL;
        char *summary = NULL;
        char *action = NULL;
        char *result = NULL;
        char *tools_json = NULL;
        char *status_str = NULL;
        json_ws(p);
        while (**p && **p != '}') {
            char *key = NULL;
            if (!json_string(p, &key)) goto item_fail;
            json_ws(p);
            if (**p != ':') {
                free(key);
                goto item_fail;
            }
            (*p)++;
            if (!strcmp(key, "type")) {
                free(type);
                if (!json_string(p, &type)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "role")) {
                free(role);
                if (!json_string(p, &role)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "content")) {
                free(content);
                if (!parse_responses_content_array(p, &content)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Explain what this code does and identify the inference stage it belongs to.

File: ds4_server.c

```c
tract for stateless replay:
 *   - The client must replay response.output items before tool outputs.
 *   - For reasoning models, the replay must also include reasoning state.  DS4
 *     can render plain reasoning summaries/content, but it cannot decrypt
 *     reasoning.encrypted_content.  If live state is unavailable and the replay
 *     only contains visible messages/tool calls, later validation marks it as a
 *     lower-fidelity replay; generate_job() logs that and continues from the
 *     visible transcript rather than killing a recoverable agent session.
 *
 * Reasoning items are merged into the next assistant message so
 * render_chat_prompt_text can wrap them in <think>. */
static bool parse_responses_input(const char **p, chat_msgs *msgs,
                                  buf *loaded_tool_schemas,
                                  tool_schema_orders *orders) {
    json_ws(p);
    if (**p != '[') return false;
    (*p)++;

    buf pending_reasoning = {0};

    json_ws(p);
    while (**p && **p != ']') {
        if (**p != '{') goto fail;
        (*p)++;
        char *type = NULL;
        char *role = NULL;
        char *content = NULL;
        char *name = NULL;
        char *namespace = NULL;
        char *call_id = NULL;
        char *item_id = NULL;
        char *arguments = NULL;
        char *output = NULL;
        char *input_str = NULL;
        char *summary = NULL;
        char *action = NULL;
        char *result = NULL;
        char *tools_json = NULL;
        char *status_str = NULL;
        json_ws(p);
        while (**p && **p != '}') {
            char *key = NULL;
            if (!json_string(p, &key)) goto item_fail;
            json_ws(p);
            if (**p != ':') {
                free(key);
                goto item_fail;
            }
            (*p)++;
            if (!strcmp(key, "type")) {
                free(type);
                if (!json_string(p, &type)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "role")) {
                free(role);
                if (!json_string(p, &role)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "content")) {
                free(content);
                if (!parse_responses_content_array(p, &content)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "namespace")) {
                free(namespace);
                if (!json_string(p, &namespace)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "call_id")) {
                free(call_id);
                if (!json_string(p, &call_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "id")) {
                free(item_id);
                if (!json_string(p, &item_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "arguments")) {
                free(arguments);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &arguments)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &arguments)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "output")) {
                free(output);
                json_ws(p);
                if (**p == '[') {
                    if (!parse_responses_content_array(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (**p == '"') {
                    if (!json_string(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &output)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "input")) {
                free(input_str);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &input_str)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &input_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "namespace")) {
                free(namespace);
                if (!json_string(p, &namespace)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "call_id")) {
                free(call_id);
                if (!json_string(p, &call_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "id")) {
                free(item_id);
                if (!json_string(p, &item_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "arguments")) {
                free(arguments);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &arguments)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &arguments)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "output")) {
                free(output);
                json_ws(p);
                if (**p == '[') {
                    if (!parse_responses_content_array(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (**p == '"') {
                    if (!json_string(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &output)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "input")) {
                free(input_str);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &input_str)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &input_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "namespace")) {
                free(namespace);
                if (!json_string(p, &namespace)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "call_id")) {
                free(call_id);
                if (!json_string(p, &call_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "id")) {
                free(item_id);
                if (!json_string(p, &item_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "arguments")) {
                free(arguments);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &arguments)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &arguments)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "output")) {
                free(output);
                json_ws(p);
                if (**p == '[') {
                    if (!parse_responses_content_array(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (**p == '"') {
                    if (!json_string(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &output)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "input")) {
                free(input_str);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &input_str)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &input_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Suggest a minimal correctness-preserving optimization for this excerpt.

File: ds4_server.c

```c
key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "name")) {
                free(name);
                if (!json_string(p, &name)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "namespace")) {
                free(namespace);
                if (!json_string(p, &namespace)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "call_id")) {
                free(call_id);
                if (!json_string(p, &call_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "id")) {
                free(item_id);
                if (!json_string(p, &item_id)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "arguments")) {
                free(arguments);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &arguments)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &arguments)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "output")) {
                free(output);
                json_ws(p);
                if (**p == '[') {
                    if (!parse_responses_content_array(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (**p == '"') {
                    if (!json_string(p, &output)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &output)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "input")) {
                free(input_str);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &input_str)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &input_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
oto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "action")) {
                free(action);
                if (!json_raw_value(p, &action)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "result")) {
                free(result);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &result)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &result)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "status")) {
                free(status_str);
                if (!json_string(p, &status_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "tools")) {
                /* tool_search_output items carry their discovered tool list
                 * here instead of in `output` / `result`. Keep it separate
                 * from the human-visible result body so malformed tool lists
                 * never get mistaken for normal tool output. */
                free(tools_json);
                if (!json_raw_value(p, &tools_json)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!json_skip_value(p)) {
                free(key);
                goto item_fail;
            }
            free(key);
            json_ws(p);
            if (**p == ',') (*p)++;
            json_ws(p);
            continue;
item_fail:
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            buf_free(&pending_reasoning);
            return false;
        }
        if (**p != '}') {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
oto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "action")) {
                free(action);
                if (!json_raw_value(p, &action)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "result")) {
                free(result);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &result)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &result)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "status")) {
                free(status_str);
                if (!json_string(p, &status_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "tools")) {
                /* tool_search_output items carry their discovered tool list
                 * here instead of in `output` / `result`. Keep it separate
                 * from the human-visible result body so malformed tool lists
                 * never get mistaken for normal tool output. */
                free(tools_json);
                if (!json_raw_value(p, &tools_json)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!json_skip_value(p)) {
                free(key);
                goto item_fail;
            }
            free(key);
            json_ws(p);
            if (**p == ',') (*p)++;
            json_ws(p);
            continue;
item_fail:
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            buf_free(&pending_reasoning);
            return false;
        }
        if (**p != '}') {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
```<｜Assistant｜></think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
oto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "action")) {
                free(action);
                if (!json_raw_value(p, &action)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "result")) {
                free(result);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &result)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &result)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "status")) {
                free(status_str);
                if (!json_string(p, &status_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "tools")) {
                /* tool_search_output items carry their discovered tool list
                 * here instead of in `output` / `result`. Keep it separate
                 * from the human-visible result body so malformed tool lists
                 * never get mistaken for normal tool output. */
                free(tools_json);
                if (!json_raw_value(p, &tools_json)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!json_skip_value(p)) {
                free(key);
                goto item_fail;
            }
            free(key);
            json_ws(p);
            if (**p == ',') (*p)++;
            json_ws(p);
            continue;
item_fail:
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            buf_free(&pending_reasoning);
            return false;
        }
        if (**p != '}') {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Trova bug sottili e spiega quali invarianti dell'inferenza possono rompersi.

File: ds4_server.c

```c
oto item_fail;
                }
            } else if (!strcmp(key, "summary")) {
                free(summary);
                if (!parse_responses_content_array(p, &summary)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "action")) {
                free(action);
                if (!json_raw_value(p, &action)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "result")) {
                free(result);
                json_ws(p);
                if (**p == '"') {
                    if (!json_string(p, &result)) {
                        free(key);
                        goto item_fail;
                    }
                } else if (!json_raw_value(p, &result)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "status")) {
                free(status_str);
                if (!json_string(p, &status_str)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!strcmp(key, "tools")) {
                /* tool_search_output items carry their discovered tool list
                 * here instead of in `output` / `result`. Keep it separate
                 * from the human-visible result body so malformed tool lists
                 * never get mistaken for normal tool output. */
                free(tools_json);
                if (!json_raw_value(p, &tools_json)) {
                    free(key);
                    goto item_fail;
                }
            } else if (!json_skip_value(p)) {
                free(key);
                goto item_fail;
            }
            free(key);
            json_ws(p);
            if (**p == ',') (*p)++;
            json_ws(p);
            continue;
item_fail:
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            buf_free(&pending_reasoning);
            return false;
        }
        if (**p != '}') {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
```<｜Assistant｜><think>


[System] You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.

[User]
Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
if (**p != '}') {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            goto fail;
        }
        (*p)++;

        const char *t = type ? type : "message";
        /* Replayed items must be in a terminal "completed" state. in_progress,
         * incomplete, and failed all represent partial model state the client
         * never confirmed — feeding them back as history would let DS4 continue
         * from a tool action that never finished. Reject explicitly. */
        if (status_str && status_str[0] &&
            strcmp(status_str, "completed") != 0)
        {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            buf_free(&pending_reasoning);
            return false;
        }
        /* Three classes of items:
         *   1. consumes_reasoning: assistant message / function_call / hosted-tool
         *      call. Attaches pending reasoning to its own assistant message.
         *   2. is_bookkeeping: compaction / context_compaction etc. Semantically
         *      transparent — passes through without touching pending_reasoning.
         *   3. everything else (user message, tool output): forces pending
         *      reasoning to flush in-position as an empty assistant message so it
         *      stays before this item in the rendered history. */
        bool consumes_reasoning =
            (!strcmp(t, "message") && role && !strcmp(role, "assistant")) ||
            !strcmp(t, "function_call") || !strcmp(t, "custom_tool_call") ||
            !strcmp(t, "local_shell_call") || !strcmp(t, "web_search_call") ||
            !strcmp(t, "tool_search_call") || !strcmp(t, "image_generation_call");
        bool is_bookkeeping =
            !strcmp(t, "compaction") || !strcmp(t, "context_compaction");
        if (!consumes_reasoning && !is_bookkeeping && pending_reasoning.len) {
            chat_msg flush_msg = {0};
```

<｜begin▁of▁sentence｜>You are DeepSeek V4 Flash running locally. Answer accurately, preserve technical details, and use tools only when the prompt asks for tool use.<｜User｜>Review this excerpt for correctness risks, memory lifetime issues, and performance bottlenecks.

File: ds4_server.c

```c
if (**p != '}') {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            goto fail;
        }
        (*p)++;

        const char *t = type ? type : "message";
        /* Replayed items must be in a terminal "completed" state. in_progress,
         * incomplete, and failed all represent partial model state the client
         * never confirmed — feeding them back as history would let DS4 continue
         * from a tool action that never finished. Reject explicitly. */
        if (status_str && status_str[0] &&
            strcmp(status_str, "completed") != 0)
        {
            free(type);
            free(role);
            free(content);
            free(name);
            free(namespace);
            free(call_id);
            free(item_id);
            free(arguments);
            free(output);
            free(input_str);
            free(summary);
            free(action);
            free(result);
            free(tools_json);
            free(status_str);
            buf_free(&pending_reasoning);
            return false;
        }
        /* Three classes of items:
         *   1. consumes_reasoning: assistant message / function_call / hosted-tool
         *      call. Attaches pending reasoning to its own assistant message.
         *   2. is_bookkeeping: compaction / context_compaction etc. Semantically
         *      transparent — passes through without touching pending_reasoning.
         *   3. everything else (user message, tool output): forces pending
         *      reasoning to flush in-position as an empty assistant message so it
         *      stays before this item in the rendered history. */
        bool consumes_reasoning =
            (!strcmp(t, "message") && role && !strcmp(role, "assistant")) ||
            !strcmp(t, "function_call") || !strcmp(t, "custom_tool_call") ||
            !strcmp(t, "local_shell_call") || !strcmp(t, "web_search_call") ||
            !strcmp(t, "tool_search_call") || !strcmp(t, "image_generation_call");
        bool is_bookkeeping =
            !strcmp(t, "compaction") || !strcmp(t, "context_compaction");
        if (!consumes_reasoning && !is_bookkeeping && pending_reasoning.len) {
            chat_msg flush_msg = {0};
```<｜Assistant｜></think>