40250 classic: increment 50 (Phase 1 W1) — §1.5 client version, §1.10 text codec, §2.2 two-packet merge

§1.5 CG_CLIENT_VERSION: send_client_version() now branches on locale. EUROPE (this project's locale) sends CGClientVersion2 (header 0xf1, 67B, timestamp "1215955205"); non-EUROPE sends CGClientVersion (0xfd) + CMake-injected MT_BUILD_TIMESTAMP in C __TIMESTAMP__ form. New ClassicSession::set_executable_name() (default "metin2.bin"; TODO(W0): M2Client passes OS::get_executable_path().get_file()). m_version_sent set only after send_fixed() succeeds. wire_classic.h gains CGClientVersion2 + size-table entry. §1.10 fixed-length text: new extension/src/net/text_codec.h — to_wire()/ from_wire_str() apply a hard byte cap without splitting a UTF-8 multibyte sequence; godot::String overloads are __has_include-guarded so mtnet stays godot-free. classic_session.cpp routes 8 fixed-length name/sign/comment fills through to_wire(); parser reads GC_CHAR_ADDITIONAL_INFO name via from_wire_str(). New net_text_codec_test (ctest net.text_codec). Locale codepage (CP949/CP1252) transcoding remains a follow-up; wire bytes are currently UTF-8 (ASCII round-trips). §2.2 two-packet PC/NPC merge: ClassicParser GC_CHARACTER_ADD drops invisible races (20025/20038/20039); PC/NPC only stash a bare Entity into m_pending_actor; everything else spawns immediately with a name from root/npclist.txt (new npc_names.h + set_npclist_path(); $MT_ASSETS/$M2_ASSETS fallback; TODO(W0): M2Client passes the asset root). GC_CHAR_ADDITIONAL_INFO with no pending entry records m_last_error + m_unhandled_headers and drops (never half-creates); on a hit it merges the pending Entity with the additional-info's 9 fields into one mut_spawn_full() then erases the pending entry. New pending_actor_count() test hook; net_classic_session_test updated (version assertions -> 0xf1; stash -> merge -> spawn, immediate monster spawn, invisible-race drop, no-pending additional-info is a no-op). Depends on W2 §2.2 steps 4-5 (entity_store mut_char_info touch / mut_shop_sign cleanup) — the merge works with current W2 code as-is. Build + ctest 17/17 (16 + net.text_codec); netbridge_test, p10_test green. Docs: CLIENT-GAP.md W1 row + increment-50 change-log entry; CLIENT-GAP-FIX.md §1.5/§1.10/§2.2 status + facts and C.5 batch record. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014yvAPqPivoY7vmBbzgqK4W
2026-09-02 15:51:48 +09:00
parent f32064c74a
commit b296457e3c
12 changed files with 742 additions and 74 deletions
@@ -402,20 +402,39 @@ return SendSequence();

 **修改**

-1. `wire_classic.h` 补 `HDR_CG_CLIENT_VERSION2 = 0xf1` 与
+1. ✅ `wire_classic.h` 补 `HDR_CG_CLIENT_VERSION2 = 0xF1` 与
   `struct CGClientVersion2 { uint8_t header; char filename[33]; char timestamp[33]; };`
-   `static_assert(sizeof(CGClientVersion2) == 67)`（与 `CGClientVersion` 同布局）。
-2. `send_client_version()` 按 locale 分支：
-   - `Locale.is_europe() && !Locale.is_ymir()` → 发 `CGClientVersion2{0xf1, filename, "1215955205"}`；
+   `static_assert(sizeof(CGClientVersion2) == 67)`（与 `CGClientVersion` 同布局）；
+   尺寸表补 `case HDR_CG_CLIENT_VERSION2: return sizeof(CGClientVersion2);`。
+2. ✅ `send_client_version()` 按 locale 分支：
+   - `m_locale_is_europe`（默认 true）→ 发 `CGClientVersion2{0xf1, filename, "1215955205"}`，
+     header `HDR_CG_CLIENT_VERSION2`；
   - 否则 → 发 `CGClientVersion{0xfd, filename, MT_BUILD_TIMESTAMP}`。
   本工程默认 locale 与参考一致（EUROPE 系），**默认走 0xf1**。
-3. `filename` 改为运行时取：`OS::get_executable_path().get_file()`，由 `M2Client` 传入；
-   取不到时回落 `"metin2.bin"`。
-4. `MT_BUILD_TIMESTAMP` 由 CMake 注入，格式对齐 C 的 `__TIMESTAMP__`
-   （`"Www Mmm dd hh:mm:ss yyyy"`），只在非 EUROPE 分支使用。
-5. 发送时机：跟随 `GC_MAIN_CHARACTER*`（4 个变体）解析成功后立刻发，并且
-   `return SendSequence()`（本工程即 `m_stream.send_fixed()` 的返回值透传），
-   删除现有的独立触发点与 `m_version_sent` 早置位。
+3. ✅ `filename` 改为运行时取：新增 `ClassicSession::set_executable_name(std::string)` 由
+   `M2Client` 传入 `OS::get_executable_path().get_file()`；未设置时回落 `"metin2.bin"`。
+   填充经 §1.10 的 `mtnet::to_wire(name, sizeof(p.filename) - 1)`。
+   **跨文件待接线**：`M2Client` 需调用 `classic_sess->set_executable_name(...)`（W0，已在
+   `classic_session.h` 留 `TODO(W0)`）。
+4. ✅ `MT_BUILD_TIMESTAMP` 由 `extension/CMakeLists.txt` 的
+   `string(TIMESTAMP MT_BUILD_TS "%a %b %d %H:%M:%S %Y")` +
+   `target_compile_definitions(mtnet PRIVATE MT_BUILD_TIMESTAMP=...)` 注入，格式对齐 C 的
+   `__TIMESTAMP__`（`"Www Mmm dd hh:mm:ss yyyy"`），只在非 EUROPE 分支使用；
+   `.cpp` 内有 `#ifndef MT_BUILD_TIMESTAMP #define ... __TIMESTAMP__` 兜底。
+   非 1:1：`%d` 是零补位，`__TIMESTAMP__` 的日是空格补位——按本节“近似即可”接受。
+5. ✅ 发送时机：`on_packet()` 在四个 `GC_MAIN_CHARACTER*` 变体解析成功后立刻发，
+   `return send_fixed()` 的返回值；`m_version_sent` 只在发送成功后置位，删除独立触发点。
+
+**W1 增量 50 已落地（🔎 待真实验收）**
+
+- 改动：`wire_classic.h`（enum + struct + 尺寸表）、`classic_session.{h,cpp}`
+  （`set_executable_name` / `set_locale_is_europe` setter、`m_executable_name` /
+  `m_locale_is_europe` 成员、`send_client_version()` locale 分支重写）、
+  `extension/CMakeLists.txt`（`MT_BUILD_TIMESTAMP` 定义）。
+- 测试：`net_classic_session_test` 的版本断言改为 `CGClientVersion2` / `0xf1` /
+  `filename=="metin2.bin"` / `timestamp=="1215955205"` / 尾字节 `SEQUENCE_TABLE[2]`；
+  `ctest` `net.classic_session` 通过。
+- 验收：未验证（无真实 40250 服务端确认 0xf1 被接受）。

 ### 1.6 Passpod / HackShield / XTrap / StateChecker 兼容路径

@@ -560,17 +579,38 @@ return true;

 **修改**

-1. 新建 `POC/extension/src/net/text_codec.h`：
-   - `std::string to_wire(const godot::String&, size_t cap)`：按当前 locale 代码页转换后**按字节**
-     截断到 `cap`，且不允许在多字节字符中间截断（截到最后一个完整字符）。
-   - `godot::String from_wire(const char*, size_t cap)`：反向，遇 `\0` 停。
-   - 代码页由 `Locale.gd` 的 locale 决定，与 `REF/UserInterface/Locale_inc_*.h` 一一对应。
-2. `wire_classic.h` 的所有 `char name[...]` 字段统一经 `to_wire()` 填充，删掉散落的
-   `memcpy` / `strncpy(utf8)`。
-3. 角色名校验**统一为 `<= 24` 字节**（`CHARACTER_NAME_MAX_LEN = 24`，缓冲 25 含结尾符）。
-   当前代码里 `< 24` 与 `<= 24` 两种规则各出现过，全部改为 `to_wire(name, 24).size() > 0 &&
-   <= 24`。涉及：`charselect.gd` 建号 / 改名、`guild_creation_ui.gd`（公会名上限 12）。
-4. 回归：`text_codec_test.gd` 覆盖 CJK 名恰好 24 字节、25 字节（应拒）、边界多字节截断。
+1. ✅ 新建 `extension/src/net/text_codec.h`（mtnet 侧，不依赖 godot-cpp）：
+   - `std::string to_wire(std::string_view utf8, size_t cap)`：**按字节**截断到 `cap`，
+     且不在 UTF-8 多字节序列中间截断（截到最后一个完整码点）。
+   - `std::string from_wire_str(const char *bytes, size_t cap)`：反向，遇 `\0` 停，
+     并裁掉末尾悬空的部分序列。
+   - `godot::String` 重载用 `#if __has_include(<godot_cpp/variant/string.hpp>)`
+     （`MT_TEXT_CODEC_HAS_GODOT`）守卫，保持 `net_classic_wire_test`（不链 mtnet）可编译。
+   - **非 1:1（follow-up）**：目前 wire 字节即 UTF-8，未做 locale 代码页（CP949 / CP1252）
+     转换；ASCII 可往返，非 ASCII 名对单字节编码服务端会呈现 mojibake。头注释已登记此缺口。
+2. ✅ `wire_classic.h` `#include "../text_codec.h"`；`classic_session.cpp` 里所有定长名字 /
+   招牌 / 公会名 / 好友名 / 私密文本填充改为 `mtnet::to_wire(src, cap)` +
+   `memcpy(dst, w.data(), w.size())`，共 8 处：`create_character` / `change_name` /
+   `send_whisper` / `send_private_shop` / `send_guild_grade_name` / `send_guild_comment` /
+   `send_guild_answer_make` / `send_friend_add|remove`。`GC_CHAR_ADDITIONAL_INFO` 的名字
+   读取改用 `mtnet::from_wire_str(p.name, sizeof(p.name))`。
+   保留 `strncpy`：登录 id / 密码（`m_id` / `m_pw`，非 wire 定长名字段）、`send_chat` /
+   whisper 的动态文本 body。**其余 parser 名字读取（非 ADDITIONAL_INFO）仍走原 `strnlen`**，
+   作为 follow-up。
+3. ⬜ **不在本批次**：`charselect.gd` / `guild_creation_ui.gd` 的名字长度校验统一为
+   `<= 24` 字节属 GDScript（W3 / Phase 2）；本批次只交付 C++ 侧编码。已在下方登记。
+4. ✅ 回归：新增 `extension/tests/net_text_codec_test.cpp`（`ctest` `net.text_codec`），
+   覆盖 CJK 名恰好 24 字节（接受）、25/27 字节（截断到 24，绝不 25/26）、
+   多字节边界截断（切进 3 字节序列中间丢整字）、ASCII 往返、`from_wire_str` 遇 NUL 停 /
+   悬空前导字节裁除 / 无终止符满字段整读。`extension/CMakeLists.txt` 注册。
+
+**W1 增量 50 已落地（🔎 待真实验收）**
+
+- 改动：`extension/src/net/text_codec.h`（新）、`extension/tests/net_text_codec_test.cpp`（新）、
+  `wire_classic.h`（include）、`classic_session.cpp`（8 处 to_wire 路由）、
+  `classic_parser.cpp`（ADDITIONAL_INFO from_wire_str）、`extension/CMakeLists.txt`（测试注册）。
+- 测试：`ctest` `net.text_codec` 通过（新增，套件 16 → 17）；`net.classic_session` 通过。
+- 验收：未验证（无真实服务端确认非 ASCII 名编码）；locale 代码页转换为 follow-up。

 ---

@@ -672,21 +712,42 @@ else TraceError("TPacketGCCharacterAdditionalInfo name=%s vid=%d race=%d Error",

 **修改**

-1. `ClassicParser` 增加成员 `mtnet::PendingActor m_pending_actor;`（等价 `s_kNetActorData`）。
-2. `GC_CHARACTER_ADD` 处理改为：
-   - `IsInvisibleRace(race)`（20025 / 20038 / 20039）→ 直接返回；
-   - `bType == CHRTYPE_PC || bType == CHRTYPE_NPC` → **只**写 `m_pending_actor`，不调 `EntityStore`；
-   - 否则 → 名字取 `npclist.txt` 的 `race → name`（等价 `CPythonNonPlayer::GetName`），
-     立即 `mut_spawn(...)`，且 `alignment/pk_mode/guild/empire/parts/mount/level` 全部置 0。
-3. `GC_CHAR_ADDITIONAL_INFO` 处理改为：
-   - `m_pending_actor.vid != pkt.dwVID` → 记 error 并**丢弃**，不建实体；
-   - 相等 → 用 pending + additional 的 9 个字段合成一次 `mut_spawn_full(...)`
-     （新 API，一次性写全字段并推 `ChangeKind::Spawn`）。
-4. **删除** `mut_char_info()` 里的 `touch()` 建实体路径；该函数只保留
-   「已存在实体的字段更新」语义，未知 VID 直接 return。
-5. `mut_shop_sign()`（`entity_store.cpp:483`）不要再创建通用 Entity；改为独立的
-   `ShopSign` 表现状态，分别对应参考端 `BINARY_PrivateShop_Appear/Disappear` 的招牌显示 /
-   隐藏回调。这里不是把招牌包静默丢弃，而是移除“凭空建 Actor”的补丁。
+1. ✅ `ClassicParser` 已有成员 `std::unordered_map<uint32_t, mtnet::Entity> m_pending_actor;`
+   （W0 增量 49 冻结，等价 `s_kNetActorData`，此处按多槽 map 而非单槽实现）；
+   新增 `pending_actor_count()` 供测试断言。
+2. ✅ `GC_CHARACTER_ADD` 处理改为：
+   - `is_invisible_race(race)`（20025 / 20038 / 20039）→ `return true`（丢弃，不断连接）；
+   - `type == CHRTYPE_PC || type == CHRTYPE_NPC` → **只**把裸 `Entity`（vid / race / ch_type /
+     坐标 / 角度 / 速度 / state_flags / affect_flags）写入 `m_pending_actor[vid]`，不调 `m_world`；
+   - 否则 → 名字取 `npclist.txt` 的 `race → code`（新 `npc_names.h`，等价
+     `CPythonNonPlayer::GetName`；取不到为空串），立即 `m_world.mut_spawn(...)`，
+     `alignment / pk_mode / guild / empire / parts / mount / level` 全部为 0（`mut_spawn` 默认）。
+3. ✅ `GC_CHAR_ADDITIONAL_INFO` 处理改为：
+   - `m_pending_actor` 无 `pkt.dwVID` 条目 → 写 `m_last_error` + `m_unhandled_headers`，
+     `return true`**丢弃**，不建实体；
+   - 命中 → 用 pending `Entity` + additional 的 9 个字段（name / guild / level / alignment /
+     pk_mode / empire / parts[armor/weapon/hair] / mount_vnum）合成一次
+     `m_world.mut_spawn_full(e)`（W0 新 API，一次写全字段并推 `Spawn`），随后 `erase` 该条目。
+4. ⬜ **W2 依赖（本批次不改 `entity_store.*`）**：`mut_char_info()` 的 `touch()` 建实体路径、
+   `mut_shop_sign()` 的凭空建 Entity 由 W2 按 §2.2 步骤 4–5 处理；本批次的合并逻辑对当前 W2
+   代码即可工作（`mut_spawn_full` 已就位）。
+5. ⬜ 同上，`mut_shop_sign()` → 独立 `ShopSign` 表现状态属 W2。
+6. ✅ **跨文件待接线**：`M2Client` 需调用
+   `parser().set_npclist_path(AssetRoot::path("root/npclist.txt"))`（W0，已在
+   `classic_parser.h` 留 `TODO(W0)`）；未设置时 `npc_names.h` 回落
+   `$MT_ASSETS` / `$M2_ASSETS` 环境变量，再回落空串。
+
+**W1 增量 50 已落地（🔎 待真实验收）**
+
+- 改动：`extension/src/net/classic/npc_names.h`（新，`load_npclist` / `default_npclist_path`，
+  mtnet-safe）、`classic_parser.{h,cpp}`（`set_npclist_path` / `pending_actor_count` /
+  `npc_name_for` 惰性加载、`GC_CHARACTER_ADD` 与 `GC_CHAR_ADDITIONAL_INFO` 处理重写）。
+  `GC_CHARACTER_ADD2` 处理**未动**（超出本条范围，登记为 follow-up）。
+- 测试：`net_classic_session_test` 的 NPC 块重写为“先 `GC_CHARACTER_ADD`(NPC) 只暂存
+  （`world().size()` 不变、`pending_actor_count()==1`）→ 再 `GC_CHAR_ADDITIONAL_INFO` 合并落地
+  （暂存坐标 / 速度保留、9 字段合入、`pending_actor_count()==0`）→ 怪物立即 spawn →
+  隐身 race 丢弃 → 无 pending 的 additional-info 为 no-op”。`ctest` `net.classic_session` 通过。
+- 验收：未验证（两包合并需真实 40250 服务端 `GC_CHARACTER_ADD` + `GC_CHAR_ADDITIONAL_INFO` 序列）。

 ---

@@ -2922,7 +2983,7 @@ var _pw := "123456789"
 | 工作流 | 当前状态 | 已有证据 | 下一批次 |
 |---|---|---|---|
 | W0 公共基础 / 集成 | 🟡 开发中 | DirectEnter、Classic Warp endpoint、`world_reset`、场景重建首版；增量 49 接口冻结批次（`Entity` 字段 + `mut_spawn_full/mut_ownership/mut_map_bgm/drain_dirty` + `bgm_changed` 信号 + `bgm_director.gd` + §8.6 键位入口）已提交，C++ `ctest` 16/16 + 9 项 GDScript 回归通过 | 接收 Phase 1 W1/W2/W3/W4 批次并执行 G1 |
-| W1 协议 / 账号会话 | 🟡 开发中 | 角色槽地址透传、发送结果、unknown / unhandled 错误链路、断线回 LOGIN；`m_pending_actor` 暂存表成员就位 | §1.5 真实版本包、§1.10 定长文本编码、§2.2 两包合并逻辑 |
+| W1 协议 / 账号会话 | 🟡 开发中（增量 50：§1.5 / §1.10 / §2.2 已落地，待真实验收） | 角色槽地址透传、发送结果、unknown / unhandled 错误链路、断线回 LOGIN；§1.5 locale 分支 + `CGClientVersion2`(0xf1)；§1.10 `text_codec.h` + `to_wire` 路由 + `net_text_codec_test`（套件 16→17）；§2.2 `GC_CHARACTER_ADD` 隐身丢弃 / PC·NPC 暂存 / 其余按 `npclist.txt` 命名立即 spawn，`GC_CHAR_ADDITIONAL_INFO` 无 pending 丢弃、命中则 `mut_spawn_full` 合并 | locale 代码页转码（CP949/CP1252）、真实双连接、进场延迟、GDScript 名字校验统一（Phase 2 / W3）；`M2Client` 接线 `set_executable_name` / `set_npclist_path` |
 | W2 实体 / 世界 / 战斗 | 🟡 开发中 | 地图实体 / 掉落清理、地图重建首版、实体测试和场景测试；`drain_dirty` / `mut_spawn_full` 骨架可用 | §2.1 两层模型 + 可见性、§2.3 `mut_spawn→mut_spawn_full`、§2.4 点数数组尾部、§2.5 应用顺序 + affect_flags |
 | W3 玩法 UI / 输入 | 🟡 已有首版 | 多数窗口、背包 / 任务 / 社交、键位和输入已有回归；§8.6 数字键 / F1–F4 / Ctrl+数字入口已收敛 | §8.3 帮助窗；§8.6 剩余逐行键位、LSHIFT 翻页、表情包 |
 | W4 渲染 / 资产 / 音频 | 🟡 已有首版 | GR2 / `.msa` / `.mse`、地图 / 水体 / 天气 / BGM 部分链路已有；`bgm_director.gd` 消费点就位 | §9.1 地图 BGM 曲目解析 + 音量、§9.2 后台恢复曲目、§9.3 生命周期单一属主 |
@@ -2971,3 +3032,54 @@ var _pw := "123456789"
 下一批次：Phase 1 —— W1(§1.5/§1.10/§2.2)、W2(§2.1/§2.3/§2.4/§2.5)、W3(§8.3)、
  W4(§9.1/§9.2/§9.3) 在各自 worktree 并行；Phase 2 由 W0 执行 G1 集成与文档合并
 ```
+
+```text
+批次：2026-09-02 / W1 / §1.5 §1.10 §2.2
+状态：🔎 待真实验收（代码 + 本地回归齐全；无 40250 真实服务端）
+参考：REF/UserInterface/PythonNetworkStreamPhaseGame.cpp:4155（SendClientVersionPacket）；
+  REF/UserInterface/PythonNetworkStreamPhaseGameActor.cpp:140（两包合并 / IsInvisibleRace）；
+  REF/UserInterface/StdAfx.h:43、Packet.h:380（定长文本常量）
+改动：
+  extension/src/net/text_codec.h（新）—— to_wire(string_view,cap) / from_wire_str(char*,cap)，
+    UTF-8 边界安全字节截断；godot::String 重载用 __has_include 守卫
+  extension/src/net/classic/npc_names.h（新）—— load_npclist() 解析 root/npclist.txt(vnum→code)，
+    default_npclist_path() 走 $MT_ASSETS/$M2_ASSETS；mtnet-safe（std::ifstream）
+  extension/src/net/classic/wire_classic.h —— +HDR_CG_CLIENT_VERSION2=0xF1、
+    struct CGClientVersion2(static_assert 67)、尺寸表分支；#include text_codec.h；
+    CHRTYPE_* enum + is_invisible_race()（W0 冻结项，已在增量 49 落地则保留）
+  extension/src/net/classic/classic_session.{h,cpp} —— set_executable_name/set_locale_is_europe
+    setter + m_executable_name/m_locale_is_europe 成员；send_client_version() locale 分支
+    （默认 0xf1 + "1215955205"，非 EUROPE 走 0xfd + MT_BUILD_TIMESTAMP）；8 处定长文本
+    填充路由到 to_wire()
+  extension/src/net/classic/classic_parser.{h,cpp} —— set_npclist_path/pending_actor_count/
+    npc_name_for 惰性加载；GC_CHARACTER_ADD（隐身丢弃 / PC·NPC 暂存 m_pending_actor /
+    其余 npclist 命名 + mut_spawn）；GC_CHAR_ADDITIONAL_INFO（无 pending → m_last_error +
+    drop；命中 → 合并 9 字段 + mut_spawn_full + erase）；ADDITIONAL_INFO 名字读 from_wire_str
+  extension/CMakeLists.txt —— string(TIMESTAMP)→MT_BUILD_TIMESTAMP 定义；net.text_codec 测试注册
+  extension/tests/net_text_codec_test.cpp（新）、net_classic_session_test.cpp（版本断言 +
+    两包合并断言重写）
+接口/数据结构变化：ClassicSession +2 setter +2 成员；ClassicParser +2 public 方法
+  +1 private 方法 +3 私有成员（m_npclist_path / m_npc_names / m_npc_names_loaded）；
+  wire +CGClientVersion2。未改 entity_store.* / m2_client.* / project/*。
+测试：cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug && cmake --build build -j 通过；
+  cd build && ctest --output-on-failure → 100% tests passed, 17/17
+  （新增 net.text_codec；net.classic_session 及既有 16 项全绿）；
+  godot --headless --path project --script res://netbridge_test.gd → PASS（exit 0）；
+  godot --headless --path project --script res://p10_test.gd → PASS（exit 0）。
+  环境强制项：GDScript 回归前需先跑一次 godot --headless --path project --import
+  以填充 project/.godot/global_script_class_cache.cfg（worktree 内 .godot 为空且 gitignore），
+  否则 class_name AssetRoot 无法解析；未改 project/*。无 skip。
+验收：未验证——无真实 40250 服务端确认 0xf1 版本包被接受、两包合并序列、非 ASCII 名编码。
+风险与依赖：
+  - to_wire() 仅做 UTF-8 边界安全字节截断，未做 locale 代码页（CP949/CP1252）转码；
+    ASCII 往返正确，非 ASCII 名对单字节编码服务端呈 mojibake（follow-up）
+  - MT_BUILD_TIMESTAMP 的日为零补位（%d），__TIMESTAMP__ 为空格补位——按 §1.5“近似即可”
+  - 跨文件待接线（W0/M2Client）：set_executable_name(OS::get_executable_path().get_file())、
+    parser().set_npclist_path(AssetRoot::path("root/npclist.txt"))；均已留 TODO(W0)
+  - §2.2 步骤 4–5（entity_store mut_char_info touch / mut_shop_sign）属 W2，本批次未动；
+    合并逻辑对当前 W2 代码可工作
+  - parser 中 ADDITIONAL_INFO 以外的名字读取仍走 strnlen；GC_CHARACTER_ADD2 处理未动（follow-up）
+  - GDScript 名字长度校验统一（charselect.gd / guild_creation_ui.gd）属 Phase 2 / W3
+下一批次：Phase 2 —— W0 执行 G1 集成，接线 set_executable_name / set_npclist_path，
+  合并 §2.2 步骤 4–5，统一 GDScript 名字校验；真实 40250 服务端到位后做 §1.5/§1.10/§2.2 真服验收
+```
@@ -56,7 +56,7 @@
 | 工作流 | 状态 | 当前已知进展 | 下一步 |
 |---|---|---|---|
 | W0 公共基础 / 集成 | 🟡 | DirectEnter、Classic Warp endpoint、`world_reset`、场景重建首版已落地；增量 49 接口冻结批次（`Entity` 补字段 + `mut_spawn_full/mut_ownership/mut_map_bgm/drain_dirty`、`bgm_changed` 信号、`bgm_director.gd`、§8.6 键位收敛）已提交 | Phase 1 4 工作流并行完成后执行 G1 集成 |
-| W1 协议 / 账号会话 | 🟡 | 角色槽地址透传、发送结果、unknown / unhandled 错误链路、断线回 LOGIN 已覆盖；`m_pending_actor` 暂存表成员已就位 | §1.5 真实版本包、§1.10 定长文本编码、§2.2 两包合并逻辑；真实双连接、enter delay |
+| W1 协议 / 账号会话 | 🟡 | 增量 50：§1.5 版本包按 locale 分支（EUROPE 发 `CG_CLIENT_VERSION2` 0xf1 + `"1215955205"`，其余发 0xfd + `MT_BUILD_TIMESTAMP`）、可执行名 setter；§1.10 `text_codec.h` UTF-8 安全定长文本裁剪 + `net_text_codec_test`，会话侧所有定长 name/sign/comment 填充改走 `to_wire()`；§2.2 `GC_CHARACTER_ADD` 按 invisible-race 丢弃 / PC·NPC 暂存 `m_pending_actor` / 其余即时 `mut_spawn`（名字取自 npclist.txt），`GC_CHAR_ADDITIONAL_INFO` 无暂存则记录并丢弃、命中则合并 9 字段 `mut_spawn_full` 后清表 | 真实 locale codepage 转码、真实双连接、enter delay；GDScript 名称长度校验统一（Phase 2/W3） |
 | W2 实体 / 世界 / 战斗 | 🟡 | 地图实体 / 掉落清理、地图重建首版及离线回归已覆盖；`drain_dirty` / `mut_spawn_full` 骨架可用 | §2.1 两层模型 + 可见性、§2.3 `mut_spawn→mut_spawn_full`、§2.4 点数数组尾部、§2.5 应用顺序 + affect_flags |
 | W3 玩法 UI / 输入 | 🟡 | 多数窗口、背包 / 任务 / 社交、键位和输入已有首版；§8.6 数字键 / F1–F4 / Ctrl+数字入口已收敛 | §8.3 帮助窗；§8.6 剩余逐行键位与表情包 |
 | W4 渲染 / 资产 / 音频 | 🟡 | GR2 / `.msa` / `.mse`、地图 / 水体 / 天气 / BGM 部分链路已有；`bgm_director.gd` 消费点已就位 | §9.1 地图 BGM 曲目解析 + 音量、§9.2 后台恢复曲目、§9.3 生命周期单一属主 |
@@ -115,6 +115,32 @@
 >   `net_classic_session_test`、`gamescene_test`、`p9_test`、`p2b_test`、`netbridge_test`、
 >   `p8_test` 已通过；受限环境下 localhost TCP 目标测试仍自动 skip。真实 40250 换图 / 第二次
 >   连接 E2E、地图 BGM 选择和 `MT_CLASSIC_ENTER_DELAY` 仍待完成。
+> - **2026-09-02 增量 50（Phase 1 W1）**：落地 `CLIENT-GAP-FIX.md` §1.5 / §1.10 / §2.2。
+>   §1.5：`ClassicSession::send_client_version()` 改为 locale 分支——EUROPE（本项目 locale）发
+>   `CG_CLIENT_VERSION2`（header `0xf1`，`CGClientVersion2` 67B，timestamp 固定 `"1215955205"`），
+>   非 EUROPE 发 `CG_CLIENT_VERSION`（`0xfd`）+ CMake 注入的 `MT_BUILD_TIMESTAMP`（C `__TIMESTAMP__`
+>   形态）；新增 `set_executable_name()`（默认 `"metin2.bin"`，`// TODO(W0)` 由 M2Client 传
+>   `OS::get_executable_path().get_file()`）；版本包只在 `send_fixed()` 成功后置 `m_version_sent`。
+>   `wire_classic.h` 补 `CGClientVersion2` 结构 + 尺寸表项。§1.10：新增 `extension/src/net/text_codec.h`
+>   —— `to_wire()/from_wire_str()` 做 UTF-8 安全的按字节裁剪（不切多字节序列，硬字节上限），
+>   `godot::String` 重载用 `__has_include` 守卫使 mtnet 仍无 godot 依赖；`classic_session.cpp` 里
+>   create/change name、whisper、私店招牌、公会等级名 / 公告、`ANSWER_MAKE_GUILD`、好友增删共 8 处
+>   定长填充改走 `to_wire()`，parser 侧 `GC_CHAR_ADDITIONAL_INFO` 名字读取走 `from_wire_str()`；
+>   新增 `net_text_codec_test`（CJK 24B 收下 / 27B 截到 24B / 多字节边界 / ASCII 往返 / 读端悬挂字节）。
+>   真实 locale codepage（CP949 / CP1252）转码仍为后续项，当前 wire 字节即 UTF-8（ASCII 往返一致）。
+>   §2.2：`ClassicParser` `GC_CHARACTER_ADD` —— `is_invisible_race`（20025/20038/20039）直接丢弃；
+>   `bType==PC||NPC` 仅把裸 `Entity`（vid/race/type/坐标/朝向/速度/state·affect flag）暂存进
+>   `m_pending_actor`，不碰世界模型；其余（怪 / 石 / 门 / 物件）即时 `mut_spawn()`，名字取自
+>   `root/npclist.txt`（race→code，新增 `npc_names.h` + `set_npclist_path()` setter，`$MT_ASSETS`/
+>   `$M2_ASSETS` 回退，`// TODO(W0)` 由 M2Client 传资源根，无表时名字为空）。`GC_CHAR_ADDITIONAL_INFO`
+>   —— 无对应暂存则写 `m_last_error` + `m_unhandled_headers` 并丢弃（绝不半创建）；命中则把暂存
+>   `Entity` 与附加信息 9 字段（name/guild/level/alignment/pk_mode/empire/parts[armor/weapon/hair]/
+>   mount_vnum）合并为一条，`mut_spawn_full()` 落地后 `erase` 暂存项。新增 `pending_actor_count()`
+>   测试钩子；`net_classic_session_test` 更新（版本包断言改 `0xf1`/`CGClientVersion2`；新增两包
+>   暂存 → 合并 → 落地、怪即时生成、invisible-race 丢弃、无暂存附加信息为空操作的覆盖）。
+>   依赖 W2 §2.2 步骤 4–5（`mut_char_info` touch-create / `mut_shop_sign` 裸 `Entity` 清理）——
+>   本次合并逻辑与当前 W2 代码兼容。C++ `ctest` 17/17（原 16 + `net.text_codec`）、`netbridge_test`、
+>   `p10_test` 全绿。
 > - **2026-09-02 增量 49（W0 接口冻结批次）**：为 Phase 1 的 4 个并行工作流一次性落地跨工作流
 >   共享文件的骨架，冻结接口后再拆分。`EntityStore`：`Entity` 补 `empire / affect_flags /
 >   owner_vid / state_flags` 字段；新增 `mut_spawn_full()`（§2.3 两包合并的单次落地入口）、
@@ -28,6 +28,10 @@ add_library(mtnet STATIC
 target_include_directories(mtnet PUBLIC src/net)
 target_link_libraries(mtnet PUBLIC mt3p::sodium mt3p::minilzo mt3p::cryptopp)
 target_compile_features(mtnet PUBLIC cxx_std_20)
+# §1.5: non-EUROPE CG_CLIENT_VERSION timestamp, in C __TIMESTAMP__ form
+# ("Www Mmm dd hh:mm:ss yyyy"); regenerated on each CMake configure.
+string(TIMESTAMP MT_BUILD_TS "%a %b %d %H:%M:%S %Y")
+target_compile_definitions(mtnet PRIVATE MT_BUILD_TIMESTAMP="${MT_BUILD_TS}")

 # --- mtpack: m2dev-fork asset pack reader/writer (libsodium + zstd) ---
 add_library(mtpack STATIC
@@ -109,6 +113,10 @@ if(BUILD_TESTING AND MT_HOST_BUILD)
 	target_link_libraries(net_classic_mark_test PRIVATE mtnet)
 	add_test(NAME net.classic_mark COMMAND $<TARGET_FILE:net_classic_mark_test>)

+	add_executable(net_text_codec_test tests/net_text_codec_test.cpp)
+	target_link_libraries(net_text_codec_test PRIVATE mtnet)
+	add_test(NAME net.text_codec COMMAND $<TARGET_FILE:net_text_codec_test>)
+
    add_executable(net_mark_test tests/net_mark_test.cpp)
    target_link_libraries(net_mark_test PRIVATE mtnet mt3p::minilzo)
    add_test(NAME net.guild_mark COMMAND $<TARGET_FILE:net_mark_test>)
@@ -1,10 +1,31 @@
 #include "classic_parser.h"

 #include <cstring>
+#include <string>
+#include <utility>
 #include <vector>

 namespace mtnet::classic {

+void ClassicParser::set_npclist_path(std::string path) {
+	if (path == m_npclist_path) {
+		return;
+	}
+	m_npclist_path = std::move(path);
+	m_npc_names.clear();
+	m_npc_names_loaded = false;
+}
+
+const std::string &ClassicParser::npc_name_for(uint16_t race) {
+	static const std::string kEmpty;
+	if (!m_npc_names_loaded) {
+		m_npc_names = load_npclist(m_npclist_path.empty() ? default_npclist_path() : m_npclist_path);
+		m_npc_names_loaded = true;
+	}
+	const auto it = m_npc_names.find(race);
+	return it == m_npc_names.end() ? kEmpty : it->second;
+}
+
 void ClassicParser::parse_login_success(const SimplePlayer *players, const uint32_t *guild_id,
 		const char (*guild_name)[GUILD_NAME_MAX_LEN + 1], int n, uint32_t handle, uint32_t rkey) {
 	m_slots.clear();
@@ -207,7 +228,36 @@ bool ClassicParser::on_gc(uint8_t header, const uint8_t *body, uint32_t len) {
 			if (!fill(p, header, body, len)) {
 				return false;
 			}
-			m_world.mut_spawn(p.vid, p.race, p.type, /*name*/ std::string(), (float)p.x, (float)p.y,
+			// §0.3 / §2.2: the reference client (IsInvisibleRace) never spawns
+			// these — drop before any stash / spawn.
+			if (is_invisible_race(p.race)) {
+				return true;
+			}
+			if (p.type == CHRTYPE_PC || p.type == CHRTYPE_NPC) {
+				// Two-packet actor: GC_CHARACTER_ADD carries no name / guild /
+				// parts, so stash a bare record and wait for
+				// GC_CHAR_ADDITIONAL_INFO to merge + flush it. The world model
+				// is untouched until then (§0.2 data layer only).
+				Entity &e = m_pending_actor[p.vid];
+				e = Entity{};
+				e.vid = p.vid;
+				e.race = p.race;
+				e.ch_type = p.type;
+				e.x = (float)p.x;
+				e.y = (float)p.y;
+				e.z = (float)p.z;
+				e.angle = p.angle;
+				e.moving_speed = p.moving_speed;
+				e.attack_speed = p.attack_speed;
+				e.state_flags = p.state_flag;
+				e.affect_flags = (uint64_t)p.affect_flag[0] |
+						((uint64_t)p.affect_flag[1] << 32);
+				return true;
+			}
+			// Monster / stone / door / object: appended immediately, name from
+			// npclist.txt (race -> code, like CPythonNonPlayer::GetName); every
+			// PC-specific field stays 0.
+			m_world.mut_spawn(p.vid, p.race, p.type, npc_name_for(p.race), (float)p.x, (float)p.y,
 					(float)p.z, p.angle, p.moving_speed, p.attack_speed);
 			return true;
 		}
@@ -396,9 +446,31 @@ bool ClassicParser::on_gc(uint8_t header, const uint8_t *body, uint32_t len) {
 			if (!fill(p, header, body, len)) {
 				return false;
 			}
-			m_world.mut_char_info(p.vid, std::string(p.name, strnlen(p.name, sizeof(p.name))),
-					p.parts, p.empire, (int32_t)p.guild_id, (int32_t)p.level, p.alignment,
-					p.pk_mode, p.mount_vnum);
+			// §2.2: this only ever completes a pending GC_CHARACTER_ADD (the
+			// reference merges into s_kNetActorData, populated by that add). No
+			// pending record -> nothing to build a PC/NPC from: record + drop,
+			// never half-create.
+			const auto it = m_pending_actor.find(p.vid);
+			if (it == m_pending_actor.end()) {
+				m_last_error = "GC_CHAR_ADDITIONAL_INFO: no pending actor for vid " +
+						std::to_string(p.vid);
+				m_unhandled_headers.push_back(header);
+				return true;
+			}
+			Entity e = it->second;
+			e.vid = p.vid;
+			e.name = mtnet::from_wire_str(p.name, sizeof(p.name)); // §1.10
+			e.guild = (int32_t)p.guild_id;
+			e.level = (int32_t)p.level;
+			e.alignment = p.alignment;
+			e.pk_mode = p.pk_mode;
+			e.empire = p.empire;
+			for (int i = 0; i < CHR_EQUIPPART_NUM; ++i) {
+				e.parts[i] = p.parts[i];
+			}
+			e.mount_vnum = p.mount_vnum;
+			m_world.mut_spawn_full(e);
+			m_pending_actor.erase(it);
 			return true;
 		}
 		case HDR_GC_SKILL_LEVEL: { // 76
@@ -8,6 +8,7 @@
 // [header][uint16 size] prefix); `len` its length — i.e. exactly what
 // ClassicStream::on_packet delivers.

+#include "npc_names.h"
 #include "wire_classic.h"

 #include "../entity_store.h"
@@ -67,6 +68,16 @@ public:
 	uint8_t empire() const { return m_empire; }
 	void set_phase_name(const std::string &name) { m_phase_name = name; }
 	const std::string &last_error() const { return m_last_error; }
+	// §2.2: path to root/npclist.txt (race -> model-code table). Used to name
+	// monster / stone / object spawns, mirroring CPythonNonPlayer::GetName().
+	// Empty path -> names resolve to "" (permitted). Falls back to
+	// $MT_ASSETS / $M2_ASSETS when never set.
+	// TODO(W0): M2Client should call
+	//   parser().set_npclist_path(AssetRoot::path("root/npclist.txt"))
+	void set_npclist_path(std::string path);
+	// §2.2 test hook: number of GC_CHARACTER_ADD records awaiting their
+	// GC_CHAR_ADDITIONAL_INFO merge.
+	size_t pending_actor_count() const { return m_pending_actor.size(); }
 	std::vector<uint8_t> drain_unhandled_headers() {
 		auto v = std::move(m_unhandled_headers);
 		m_unhandled_headers.clear();
@@ -101,12 +112,18 @@ private:
 	void parse_login_success(const SimplePlayer *players, const uint32_t *guild_id,
 			const char (*guild_name)[GUILD_NAME_MAX_LEN + 1], int n, uint32_t handle,
 			uint32_t rkey);
+	// Lazily loads npclist.txt on first use; returns "" for an unknown race or
+	// when no list is available.
+	const std::string &npc_name_for(uint16_t race);

 	EntityStore &m_world;
 	// §2.2 two-packet PC/NPC merge: GC_CHARACTER_ADD stages a bare Entity here
 	// keyed by vid; GC_CHAR_ADDITIONAL_INFO merges its fields and flushes the
 	// combined record via m_world.mut_spawn_full(). W1 owns the merge logic.
 	std::unordered_map<uint32_t, Entity> m_pending_actor;
+	std::string m_npclist_path;
+	std::unordered_map<uint32_t, std::string> m_npc_names;
+	bool m_npc_names_loaded = false;
 	std::vector<CharSlot> m_slots;
 	int m_slot_count = 0;
 	uint32_t m_handle = 0;
@@ -4,6 +4,13 @@
 #include <cstring>
 #include <vector>

+#ifndef MT_BUILD_TIMESTAMP
+// Injected by CMake (extension/CMakeLists.txt) in C __TIMESTAMP__ form
+// ("Www Mmm dd hh:mm:ss yyyy"); §1.5 uses it as the non-EUROPE
+// CG_CLIENT_VERSION timestamp. This fallback keeps a non-CMake build compiling.
+#define MT_BUILD_TIMESTAMP __TIMESTAMP__
+#endif
+
 namespace mtnet::classic {

 namespace {
@@ -419,7 +426,8 @@ bool ClassicSession::create_character(int slot, const std::string &name, int job
 	CGPlayerCreate p{};
 	p.header = HDR_CG_CHARACTER_CREATE;
 	p.index = static_cast<uint8_t>(slot);
-	std::memcpy(p.name, name.data(), name.size());
+	const std::string wire_name = mtnet::to_wire(name, sizeof(p.name) - 1); // §1.10
+	std::memcpy(p.name, wire_name.data(), wire_name.size());
 	p.job = static_cast<uint16_t>(job);
 	p.shape = static_cast<uint8_t>(shape);
 	p.con = static_cast<uint8_t>(con);
@@ -449,7 +457,8 @@ bool ClassicSession::change_name(int slot, const std::string &name) {
 	CGChangeName p{};
 	p.header = HDR_CG_CHANGE_NAME;
 	p.index = static_cast<uint8_t>(slot);
-	std::memcpy(p.name, name.data(), name.size());
+	const std::string wire_name = mtnet::to_wire(name, sizeof(p.name) - 1); // §1.10
+	std::memcpy(p.name, wire_name.data(), wire_name.size());
 	return m_stream.send_fixed(&p, sizeof(p));
 }

@@ -465,13 +474,31 @@ bool ClassicSession::send_client_version() {
 	if (m_version_sent) {
 		return true;
 	}
-	CGClientVersion p{};
 	// The stock 40250 game client sends the version report immediately after
 	// receiving the main-character packet and advances the normal CG sequence.
-	p.header = HDR_CG_CLIENT_VERSION;
-	std::strncpy(p.filename, "metin2.bin", sizeof(p.filename) - 1);
-	std::strncpy(p.timestamp, "1215955205", sizeof(p.timestamp) - 1);
-	if (!m_stream.send_fixed(&p, sizeof(p))) {
+	// §1.5: EUROPE-family locales send CG_CLIENT_VERSION2 (0xf1) with the fixed
+	// ymir epoch string; every other locale sends CG_CLIENT_VERSION (0xfd) with
+	// the build timestamp. All fixed-length text fills go through
+	// mtnet::to_wire() (§1.10) — a hard byte cap on a code-point boundary.
+	bool ok = false;
+	if (m_locale_is_europe) {
+		CGClientVersion2 p{};
+		p.header = HDR_CG_CLIENT_VERSION2;
+		const std::string fn = mtnet::to_wire(m_executable_name, sizeof(p.filename) - 1);
+		std::memcpy(p.filename, fn.data(), fn.size());
+		const std::string ts = mtnet::to_wire(std::string_view("1215955205"), sizeof(p.timestamp) - 1);
+		std::memcpy(p.timestamp, ts.data(), ts.size());
+		ok = m_stream.send_fixed(&p, sizeof(p));
+	} else {
+		CGClientVersion p{};
+		p.header = HDR_CG_CLIENT_VERSION;
+		const std::string fn = mtnet::to_wire(m_executable_name, sizeof(p.filename) - 1);
+		std::memcpy(p.filename, fn.data(), fn.size());
+		const std::string ts = mtnet::to_wire(std::string_view(MT_BUILD_TIMESTAMP), sizeof(p.timestamp) - 1);
+		std::memcpy(p.timestamp, ts.data(), ts.size());
+		ok = m_stream.send_fixed(&p, sizeof(p));
+	}
+	if (!ok) {
 		return false;
 	}
 	m_version_sent = true;
@@ -808,7 +835,8 @@ bool ClassicSession::send_whisper(const std::string &to, const std::string &text
 	CGWhisper p{};
 	p.header = HDR_CG_WHISPER;
 	p.size = static_cast<uint16_t>(total);
-	std::memcpy(p.name_to, to.data(), to.size());
+	const std::string wire_to = mtnet::to_wire(to, sizeof(p.name_to) - 1); // §1.10
+	std::memcpy(p.name_to, wire_to.data(), wire_to.size());
 	std::memcpy(buf.data(), &p, sizeof(p));
 	std::memcpy(buf.data() + sizeof(p), text.data(), text.size());
 	return m_stream.send_dynamic(buf.data(), buf.size());
@@ -974,7 +1002,8 @@ bool ClassicSession::send_private_shop(const std::string &sign,
 	std::vector<uint8_t> buf(total, 0);
 	CGMyShopHead head{};
 	head.header = HDR_CG_MYSHOP;
-	std::memcpy(head.sign, sign.data(), sign.size());
+	const std::string wire_sign = mtnet::to_wire(sign, sizeof(head.sign) - 1); // §1.10
+	std::memcpy(head.sign, wire_sign.data(), wire_sign.size());
 	head.count = static_cast<uint8_t>(n);
 	std::memcpy(buf.data(), &head, sizeof(head));
 	if (n > 0) {
@@ -1059,7 +1088,8 @@ bool ClassicSession::send_guild_grade_name(uint8_t grade, const std::string &nam
 	CGGuild head{HDR_CG_GUILD, GUILD_CG_CHANGE_GRADE_NAME};
 	std::memcpy(buf, &head, sizeof(head));
 	buf[sizeof(head)] = grade;
-	std::memcpy(buf + sizeof(head) + 1, name.data(), name.size());
+	const std::string wire_name = mtnet::to_wire(name, GUILD_GRADE_NAME_MAX_LEN); // §1.10
+	std::memcpy(buf + sizeof(head) + 1, wire_name.data(), wire_name.size());
 	return m_stream.send_fixed(buf, sizeof(buf));
 }

@@ -1096,12 +1126,13 @@ bool ClassicSession::send_guild_member_general(uint32_t pid, bool enabled) {
 bool ClassicSession::send_guild_comment(const std::string &text) {
 	if (m_stage != Stage::InGame || text.empty() ||
 			text.size() + 1 > GUILD_COMMENT_MAX_LEN) return false;
-	std::vector<uint8_t> buf(sizeof(CGGuild) + 1 + text.size() + 1, 0);
+	const std::string wire_text = mtnet::to_wire(text, GUILD_COMMENT_MAX_LEN - 1); // §1.10
+	std::vector<uint8_t> buf(sizeof(CGGuild) + 1 + wire_text.size() + 1, 0);
 	CGGuild head{HDR_CG_GUILD, GUILD_CG_POST_COMMENT};
 	std::memcpy(buf.data(), &head, sizeof(head));
-	buf[sizeof(head)] = static_cast<uint8_t>(text.size() + 1);
-	if (!text.empty()) {
-		std::memcpy(buf.data() + sizeof(head) + 1, text.data(), text.size());
+	buf[sizeof(head)] = static_cast<uint8_t>(wire_text.size() + 1);
+	if (!wire_text.empty()) {
+		std::memcpy(buf.data() + sizeof(head) + 1, wire_text.data(), wire_text.size());
 	}
 	return m_stream.send_fixed(buf.data(), buf.size());
 }
@@ -1120,7 +1151,8 @@ bool ClassicSession::send_guild_answer_make(const std::string &name) {
 	if (m_stage != Stage::InGame || name.empty() || name.size() > GUILD_NAME_MAX_LEN) return false;
 	CGAnswerMakeGuild p{};
 	p.header = HDR_CG_ANSWER_MAKE_GUILD;
-	std::memcpy(p.guild_name, name.data(), name.size());
+	const std::string wire_name = mtnet::to_wire(name, sizeof(p.guild_name) - 1); // §1.10
+	std::memcpy(p.guild_name, wire_name.data(), wire_name.size());
 	return m_stream.send_fixed(&p, sizeof(p));
 }

@@ -1164,7 +1196,8 @@ bool ClassicSession::send_friend_add(const std::string &name) {
 	std::vector<uint8_t> buf(sizeof(CGMessenger) + CHARACTER_NAME_MAX_LEN, 0);
 	CGMessenger p{HDR_CG_MESSENGER, MESSENGER_CG_ADD_BY_NAME};
 	std::memcpy(buf.data(), &p, sizeof(p));
-	std::memcpy(buf.data() + sizeof(p), name.data(), name.size());
+	const std::string wire_name = mtnet::to_wire(name, CHARACTER_NAME_MAX_LEN); // §1.10
+	std::memcpy(buf.data() + sizeof(p), wire_name.data(), wire_name.size());
 	return m_stream.send_fixed(buf.data(), buf.size());
 }

@@ -1175,7 +1208,8 @@ bool ClassicSession::send_friend_remove(const std::string &name) {
 	std::vector<uint8_t> buf(sizeof(CGMessenger) + CHARACTER_NAME_MAX_LEN, 0);
 	CGMessenger p{HDR_CG_MESSENGER, MESSENGER_CG_REMOVE};
 	std::memcpy(buf.data(), &p, sizeof(p));
-	std::memcpy(buf.data() + sizeof(p), name.data(), name.size());
+	const std::string wire_name = mtnet::to_wire(name, CHARACTER_NAME_MAX_LEN); // §1.10
+	std::memcpy(buf.data() + sizeof(p), wire_name.data(), wire_name.size());
 	return m_stream.send_fixed(buf.data(), buf.size());
 }

@@ -17,6 +17,7 @@
 #include <cstdint>
 #include <functional>
 #include <string>
+#include <utility>

 namespace mtnet::classic {

@@ -159,6 +160,18 @@ public:
 	// caller drives enter_game()). The 40250 test account sends a large map-load
 	// burst; waiting for that burst to drain avoids racing the server's spawn data.
 	void set_auto_entergame_delay(uint32_t ms) { m_entergame_delay = ms; }
+	// §1.5: the client-version report (CG_CLIENT_VERSION / _VERSION2) carries the
+	// running executable's file name — the stock client passes the launched
+	// .exe/.bin name (CPythonApplication). The net layer has no way to know it,
+	// so it stays "metin2.bin" until a host sets it.
+	// TODO(W0): M2Client should call
+	//   classic_sess->set_executable_name(OS::get_executable_path().get_file())
+	void set_executable_name(std::string name) { m_executable_name = std::move(name); }
+	// §1.5: EUROPE-family locales send CG_CLIENT_VERSION2 (0xf1) + the fixed ymir
+	// epoch string "1215955205"; every other locale sends CG_CLIENT_VERSION
+	// (0xfd) + the build timestamp. This project's LOCALE_SERVICE_* resolves to
+	// EUROPE (see docs/CLIENT-GAP-FIX.md §1.5), hence the default.
+	void set_locale_is_europe(bool on) { m_locale_is_europe = on; }
 	void set_wire_trace(bool on) {
 		m_stream.set_wire_trace(on);
 		m_auth_stream.set_wire_trace(on);
@@ -200,6 +213,8 @@ private:
 	bool m_authenticated_game = false;
 	bool m_auth_transition = false;
 	bool m_version_sent = false;
+	bool m_locale_is_europe = true;
+	std::string m_executable_name = "metin2.bin";
 	bool m_game_connection_seen = false;
 	bool m_direct_enter = false;
 	int m_direct_enter_slot = -1;
@@ -0,0 +1,81 @@
+#pragma once
+// npc_names — race -> display name for non-PC/NPC spawns (§2.2 / §0.3).
+//
+// Reference: a monster / stone / door / object spawn is appended immediately
+// with its name taken from CPythonNonPlayer::GetName(race)
+// (REF/UserInterface/PythonNetworkStreamPhaseGameActor.cpp). The localized
+// mob_proto ships translated szName strings that no longer resolve to a model
+// folder, so the client keeps root/npclist.txt as the race -> code table
+// (see project/ui/mob_view.gd, which loads the same file). We reuse that code
+// as the entity name; PC/NPC names come from GC_CHAR_ADDITIONAL_INFO instead
+// and never hit this path.
+//
+// Line format (tab- or space-separated): "<vnum>\t<code>\t[<folder>]".
+// Missing / unreadable file -> empty table -> empty name (allowed by §2.2).
+//
+// mtnet has no godot-cpp, so this reads with std::ifstream. The asset root is
+// not plumbed into ClassicParser today: set_npclist_path() lets a future
+// M2Client pass "<asset_root>/root/npclist.txt"; absent that we fall back to
+// $MT_ASSETS / $M2_ASSETS. See the cross-file follow-up in the W1 report.
+
+#include <cctype>
+#include <cstdint>
+#include <cstdlib>
+#include <fstream>
+#include <string>
+#include <unordered_map>
+
+namespace mtnet::classic {
+
+inline std::unordered_map<uint32_t, std::string> load_npclist(const std::string &path) {
+	std::unordered_map<uint32_t, std::string> table;
+	if (path.empty()) {
+		return table;
+	}
+	std::ifstream in(path);
+	if (!in) {
+		return table;
+	}
+	std::string line;
+	while (std::getline(in, line)) {
+		size_t i = 0;
+		const size_t n = line.size();
+		auto skip_ws = [&] {
+			while (i < n && (line[i] == ' ' || line[i] == '\t' || line[i] == '\r')) {
+				++i;
+			}
+		};
+		skip_ws();
+		size_t start = i;
+		while (i < n && std::isdigit(static_cast<unsigned char>(line[i]))) {
+			++i;
+		}
+		if (i == start) {
+			continue; // no leading vnum
+		}
+		const uint32_t vnum = static_cast<uint32_t>(std::strtoul(line.c_str() + start, nullptr, 10));
+		skip_ws();
+		start = i;
+		while (i < n && line[i] != ' ' && line[i] != '\t' && line[i] != '\r') {
+			++i;
+		}
+		const std::string code = line.substr(start, i - start);
+		if (vnum != 0 && !code.empty()) {
+			table.emplace(vnum, code);
+		}
+	}
+	return table;
+}
+
+// Resolve the default npclist.txt location from the environment when no
+// explicit path was supplied.
+inline std::string default_npclist_path() {
+	for (const char *var : {"MT_ASSETS", "M2_ASSETS"}) {
+		if (const char *root = std::getenv(var); root && *root) {
+			return std::string(root) + "/root/npclist.txt";
+		}
+	}
+	return {};
+}
+
+} // namespace mtnet::classic
@@ -23,6 +23,11 @@
 #include <cstddef>
 #include <cstdint>

+// §1.10: every fixed-length `char name[...]` / sign / comment field below is
+// filled at the call site via mtnet::to_wire(src, cap) (byte cap, no split
+// multibyte char) and read back via mtnet::from_wire_str().
+#include "../text_codec.h"
+
 namespace mtnet::classic {

 // ------------------------------------------------------------------ constants
@@ -52,6 +57,28 @@ inline constexpr int GUILD_MARK_WIDTH = 16;
 inline constexpr int GUILD_MARK_HEIGHT = 12;
 inline constexpr int MARK_BLOCK_TOTAL_COUNT = 80;

+// CHRTYPE_* — the domain of Entity::ch_type and packet_add_char.bType
+// (client GameType.h / server char.h). Values line up with the Entity comment.
+enum : uint8_t {
+	CHRTYPE_PC = 0,
+	CHRTYPE_NPC = 1,
+	CHRTYPE_MONSTER = 2,
+	CHRTYPE_STONE = 3,
+	CHRTYPE_WARP = 4,
+	CHRTYPE_DOOR = 5,
+	CHRTYPE_BUILDING = 6,
+	CHRTYPE_PET = 7,
+	CHRTYPE_HORSE = 8,
+	CHRTYPE_GOTO = 9,
+};
+
+// Races the reference client never spawns — REF/UserInterface/
+// PythonNetworkStreamPhaseGameActor.cpp:66 IsInvisibleRace(). GC_CHARACTER_ADD
+// for one of these is dropped before any pending/stash step.
+inline constexpr bool is_invisible_race(uint16_t race) {
+	return race == 20025 || race == 20038 || race == 20039;
+}
+
 // EPacketShopSubHeaders (client Packet.h L1864)
 enum : uint8_t {
 	SHOP_SUB_START = 0,
@@ -466,6 +493,17 @@ struct CGClientVersion {
 };
 static_assert(sizeof(CGClientVersion) == 67);

+// CG_CLIENT_VERSION2 (header 0xf1) — TPacketCGClientVersion2.  Same layout as
+// CGClientVersion; the EUROPE / non-YMIR locale sends THIS one with a fixed
+// timestamp "1215955205" (REF/.../PythonNetworkStreamPhaseGame.cpp:4155,
+// Locale.cpp:186).  The 0xfd variant carries the C __TIMESTAMP__ instead.
+struct CGClientVersion2 {
+	uint8_t header;
+	char filename[33];
+	char timestamp[33];
+};
+static_assert(sizeof(CGClientVersion2) == 67);
+
 struct GCPlayerCreateSuccess { uint8_t header; uint8_t account_slot; SimplePlayer player; };
 static_assert(sizeof(GCPlayerCreateSuccess) == 2 + 63);
 struct GCPlayerCreateFailure { uint8_t header; uint8_t type; };
@@ -1221,8 +1259,8 @@ constexpr int packet_size_cg(uint8_t h) {
 		case HDR_CG_CHARACTER_DELETE: return sizeof(CGPlayerDelete);
 		case HDR_CG_CHANGE_NAME: return sizeof(CGChangeName);
 		case HDR_CG_EMPIRE: return sizeof(CGEmpire);
-		case HDR_CG_CLIENT_VERSION:
-		case HDR_CG_CLIENT_VERSION2: return sizeof(CGClientVersion);
+		case HDR_CG_CLIENT_VERSION: return sizeof(CGClientVersion);
+		case HDR_CG_CLIENT_VERSION2: return sizeof(CGClientVersion2);
 		case HDR_CG_ENTERGAME: return sizeof(CGEnterGame);
 		case HDR_CG_MOVE: return sizeof(CGMove);
 		case HDR_CG_ATTACK: return sizeof(CGAttack);
@@ -0,0 +1,102 @@
+#pragma once
+// text_codec — one place to fill / read the 40250 wire's fixed-length text
+// fields (CLIENT-GAP-FIX §1.10).
+//
+// Reference: the stock client stores names / signs / comments as **single-byte
+// locale-codepage** strings (EterLocale + LocaleService_GetCodePage(), see
+// REF/UserInterface/Locale_inc_*.h) and fills the C buffers with
+//   strncpy(dst, src, sizeof(dst) - 1);
+// i.e. a hard **byte** cap, never a character count.
+//
+// This project carries text as UTF-8 end to end (GDScript String ->
+// std::string). Until the per-locale codepage tables are ported, to_wire() /
+// from_wire() do UTF-8-preserving byte truncation: cut on a code-point
+// boundary so a multi-byte sequence is never split, and stop at `cap` bytes.
+//
+// FOLLOW-UP (W1/W3, tracked in §1.10): wire the real locale codepage
+//   (project/Locale.gd  ->  LocaleService_GetCodePage  ->  CP949 / CP1252 / …)
+// and transcode here. Today the bytes on the wire are UTF-8; a server that
+// expects a single-byte codepage sees mojibake for non-ASCII names. ASCII
+// (the common case for account-created names) round-trips unchanged.
+//
+// mtnet (ClassicParser / ClassicSession) links **without** godot-cpp, so the
+// std::string_view core below is the one those call sites use. The
+// godot::String overloads are compiled only where <godot_cpp/...> is on the
+// include path (the M2Client / GDScript boundary).
+
+#include <cstddef>
+#include <cstdint>
+#include <string>
+#include <string_view>
+
+#if defined(__has_include)
+#	if __has_include(<godot_cpp/variant/string.hpp>)
+#		include <godot_cpp/variant/char_string.hpp>
+#		include <godot_cpp/variant/string.hpp>
+#		define MT_TEXT_CODEC_HAS_GODOT 1
+#	endif
+#endif
+
+namespace mtnet {
+
+// Byte length of the longest prefix of [s, s+n) that (a) ends on a UTF-8
+// code-point boundary and (b) is <= cap bytes. Invalid lead bytes advance one
+// byte at a time (ASCII-safe) so malformed input still terminates.
+inline size_t utf8_byte_truncate(const char *s, size_t n, size_t cap) {
+	size_t i = 0;
+	size_t last_boundary = 0;
+	while (i < n) {
+		const unsigned char c = static_cast<unsigned char>(s[i]);
+		size_t seq = 1;
+		if (c >= 0xF0 && c <= 0xF4) {
+			seq = 4;
+		} else if (c >= 0xE0 && c <= 0xEF) {
+			seq = 3;
+		} else if (c >= 0xC2 && c <= 0xDF) {
+			seq = 2;
+		}
+		if (i + seq > n) {
+			break; // truncated / invalid trailing sequence
+		}
+		if (i + seq > cap) {
+			break; // would overflow the byte cap
+		}
+		i += seq;
+		last_boundary = i;
+	}
+	return last_boundary;
+}
+
+// Fill helper for a fixed-length `char[cap+1]` wire field: returns the bytes to
+// memcpy (<= cap, never a split multi-byte char). Caller value-initialises the
+// struct so the tail stays NUL.
+inline std::string to_wire(std::string_view utf8, size_t cap) {
+	return std::string(utf8.data(), utf8_byte_truncate(utf8.data(), utf8.size(), cap));
+}
+
+// Read helper: bytes up to the first NUL or `cap`, then guarded against a
+// dangling partial sequence.
+inline std::string from_wire_str(const char *bytes, size_t cap) {
+	size_t n = 0;
+	while (n < cap && bytes[n] != '\0') {
+		++n;
+	}
+	return std::string(bytes, utf8_byte_truncate(bytes, n, n));
+}
+
+#ifdef MT_TEXT_CODEC_HAS_GODOT
+// §1.10 named API — the GDScript / M2Client boundary.
+inline std::string to_wire(const godot::String &s, size_t cap) {
+	const godot::CharString u = s.utf8();
+	const char *data = u.get_data();
+	return to_wire(std::string_view(data ? data : "", data ? static_cast<size_t>(u.length()) : 0),
+			cap);
+}
+
+inline godot::String from_wire(const char *bytes, size_t cap) {
+	const std::string s = from_wire_str(bytes, cap);
+	return godot::String::utf8(s.c_str(), static_cast<int64_t>(s.size()));
+}
+#endif
+
+} // namespace mtnet
@@ -213,25 +213,74 @@ int main() {
 		const auto *me = s.world().get(7777);
 		CHECK(me && me->is_main && me->x == 100000.f && me->name == "Warrior", "main entity");
 		auto version = drain(s);
-		CHECK(version.size() == sizeof(CGClientVersion) + 1, "CG_CLIENT_VERSION + seq");
-		CGClientVersion cv{};
+		// §1.5: EUROPE-family locale sends CG_CLIENT_VERSION2 (0xf1) with the
+		// fixed ymir epoch string; same 67-byte layout as CG_CLIENT_VERSION.
+		CHECK(version.size() == sizeof(CGClientVersion2) + 1, "CG_CLIENT_VERSION2 + seq");
+		CGClientVersion2 cv{};
 		std::memcpy(&cv, version.data(), sizeof(cv));
-		CHECK(cv.header == HDR_CG_CLIENT_VERSION && std::strcmp(cv.filename, "metin2.bin") == 0 &&
+		CHECK(cv.header == HDR_CG_CLIENT_VERSION2 && std::strcmp(cv.filename, "metin2.bin") == 0 &&
 				std::strcmp(cv.timestamp, "1215955205") == 0, "client version fields");
-		CHECK(version[sizeof(CGClientVersion)] == SEQUENCE_TABLE[2], "version seq == table[2]");
+		CHECK(version[sizeof(CGClientVersion2)] == SEQUENCE_TABLE[2], "version seq == table[2]");

+		// --- §2.2 two-packet PC/NPC merge: GC_CHARACTER_ADD only stashes; the
+		//     actor is not spawned until GC_CHAR_ADDITIONAL_INFO merges it ---
 		GCCharacterAdd add{};
 		add.header = HDR_GC_CHARACTER_ADD;
 		add.vid = 8888;
 		add.race = 101;
-		add.type = 1; // NPC
+		add.type = CHRTYPE_NPC;
 		add.x = 100500;
 		add.y = 200500;
 		add.moving_speed = 150;
 		feed(s, raw(add));
+		CHECK(s.world().get(8888) == nullptr, "PC/NPC add does not spawn yet");
+		CHECK(s.world().size() == 1, "still just the main character");
+		CHECK(s.parser().pending_actor_count() == 1, "actor stashed pending its info");
+
+		GCCharAddInfo info{};
+		info.header = HDR_GC_CHAR_ADDITIONAL_INFO;
+		info.vid = 8888;
+		std::strcpy(info.name, "Shopkeeper");
+		info.parts[0] = 7;
+		info.empire = 2;
+		info.level = 9;
+		feed(s, raw(info));
 		const auto *npc = s.world().get(8888);
-		CHECK(npc && npc->ch_type == 1 && npc->race == 101, "npc spawned");
-		CHECK(s.world().size() == 2, "2 entities");
+		CHECK(npc && npc->ch_type == CHRTYPE_NPC && npc->race == 101, "merged actor spawned");
+		CHECK(npc && npc->name == "Shopkeeper" && npc->level == 9 && npc->parts[0] == 7 &&
+				npc->empire == 2, "additional-info fields merged in");
+		CHECK(npc && npc->x == 100500.f && npc->y == 200500.f && npc->moving_speed == 150,
+				"stashed spawn fields survive the merge");
+		CHECK(s.world().size() == 2 && s.parser().pending_actor_count() == 0,
+				"pending record flushed to the world");
+
+		// a monster spawns immediately, with no additional-info handshake
+		GCCharacterAdd mob{};
+		mob.header = HDR_GC_CHARACTER_ADD;
+		mob.vid = 8890;
+		mob.race = 101;
+		mob.type = CHRTYPE_MONSTER;
+		mob.x = 101000;
+		mob.y = 201000;
+		feed(s, raw(mob));
+		CHECK(s.world().get(8890) && s.world().get(8890)->ch_type == CHRTYPE_MONSTER,
+				"monster spawned on GC_CHARACTER_ADD alone");
+		CHECK(s.world().size() == 3, "3 entities incl. the monster");
+
+		// an invisible race is dropped outright (neither stashed nor spawned)
+		GCCharacterAdd ghost{};
+		ghost.header = HDR_GC_CHARACTER_ADD;
+		ghost.vid = 8891;
+		ghost.race = 20025;
+		ghost.type = CHRTYPE_MONSTER;
+		feed(s, raw(ghost));
+		CHECK(s.world().get(8891) == nullptr && s.parser().pending_actor_count() == 0 &&
+				s.world().size() == 3, "invisible race dropped");
+
+		// drop the monster so the rest of the flow sees just main + NPC 8888
+		GCCharacterDel mobdel{HDR_GC_CHARACTER_DEL, 8890};
+		feed(s, raw(mobdel));
+		CHECK(s.world().size() == 2, "monster removed");

 		GCShopSign sign{};
 		sign.header = HDR_GC_SHOP_SIGN;
@@ -399,7 +448,7 @@ int main() {
 	// --- in-game intents: CG_MOVE / ATTACK / CHAT / TARGET, each + a seq byte ---
 	{
 		// sequence index so far: [0]=CG_LOGIN, [1]=CG_CHARACTER_SELECT,
-		// [2]=CG_CLIENT_VERSION, [3]=CG_ENTERGAME.
+		// [2]=CG_CLIENT_VERSION2, [3]=CG_ENTERGAME.
 		CHECK(s.stream().sequence_index() == 4, "seq index at 4 before intents");

 		CHECK(s.send_move(mtnet::FUNC_MOVE, 0, 90.0f, 111111, 222222, 4242), "send_move");
@@ -1130,19 +1179,27 @@ int main() {
 				out.back() == SEQUENCE_TABLE[seq], "guild invite answer wire");
 	}

-	// --- GC_CHAR_ADDITIONAL_INFO(136): fills a spawned entity's name/parts/level ---
+	// --- GC_CHAR_ADDITIONAL_INFO(136) with no matching pending GC_CHARACTER_ADD
+	//     is dropped and leaves the live entity untouched (§2.2) ---
 	{
+		const auto *before = s.world().get(8888);
+		CHECK(before != nullptr, "8888 present before the drop test");
+		const std::string name0 = before->name;
+		const int32_t level0 = before->level;
+		const uint16_t part0 = before->parts[0];
+
 		GCCharAddInfo ci{};
 		ci.header = HDR_GC_CHAR_ADDITIONAL_INFO;
 		ci.vid = 8888;
 		std::strcpy(ci.name, "Goblin");
 		ci.parts[0] = 3;
-		ci.empire = 1;
-		ci.guild_id = 0;
 		ci.level = 12;
 		feed(s, raw(ci));
+
 		const auto *e = s.world().get(8888);
-		CHECK(e && e->name == "Goblin" && e->level == 12 && e->parts[0] == 3, "char_add_info");
+		CHECK(e && e->name == name0 && e->level == level0 && e->parts[0] == part0,
+				"additional-info without a pending add is a no-op");
+		CHECK(s.parser().pending_actor_count() == 0, "no stray pending record created");
 	}

 	// --- GC_SYNC_POSITION(5, dynamic): snap entities ---
@@ -0,0 +1,106 @@
+// net_text_codec_test — §1.10 fixed-length wire text: to_wire() / from_wire_str()
+// must apply a hard BYTE cap (like the stock client's strncpy) while never
+// splitting a UTF-8 multi-byte sequence.
+#include "../src/net/text_codec.h"
+
+#include <cstdio>
+#include <cstring>
+#include <string>
+
+static int g_fail = 0;
+#define CHECK(c, msg)                               \
+	do {                                            \
+		if (!(c)) {                                 \
+			std::fprintf(stderr, "FAIL: %s\n", msg); \
+			++g_fail;                               \
+		}                                          \
+	} while (0)
+
+// A CJK code point is 3 bytes in UTF-8 (U+6C49 "汉" = e6 b1 89).
+static std::string cjk(int n) {
+	std::string s;
+	for (int i = 0; i < n; ++i) {
+		s += "\xE6\xB1\x89";
+	}
+	return s;
+}
+
+int main() {
+	using mtnet::to_wire;
+	using mtnet::from_wire_str;
+
+	// --- CHARACTER_NAME_MAX_LEN-equivalent cap = 24 bytes ---
+	// 8 CJK chars == exactly 24 bytes: accepted whole.
+	{
+		const std::string in = cjk(8);
+		CHECK(in.size() == 24, "8 CJK == 24 bytes");
+		const std::string w = to_wire(in, 24);
+		CHECK(w.size() == 24 && w == in, "exactly-24 accepted unchanged");
+	}
+
+	// 9 CJK chars == 27 bytes: truncated to 24 (8 chars), never 25/26.
+	{
+		const std::string in = cjk(9);
+		CHECK(in.size() == 27, "9 CJK == 27 bytes");
+		const std::string w = to_wire(in, 24);
+		CHECK(w.size() == 24, "27 -> 24 bytes");
+		CHECK(w == cjk(8), "truncated on the code-point boundary (8 chars)");
+	}
+
+	// 25-byte input (8 CJK + 1 stray lead byte): a 24-byte cap keeps 8 chars,
+	// and even a 25- or 26-byte cap cannot fit the 9th char -> still 24.
+	{
+		std::string in = cjk(8);
+		in += '\xE6'; // dangling lead byte of a 9th char
+		CHECK(in.size() == 25, "25-byte input");
+		CHECK(to_wire(in, 24).size() == 24, "cap 24 -> 24");
+		CHECK(to_wire(in, 25) == cjk(8), "cap 25 -> 24 (no split)");
+		CHECK(to_wire(in, 26) == cjk(8), "cap 26 -> 24 (9th char needs 3)");
+	}
+
+	// Mid-sequence cap: cutting 2 bytes into a 3-byte char drops the whole char.
+	{
+		const std::string in = cjk(4); // 12 bytes
+		CHECK(to_wire(in, 11).size() == 9, "cap 11 -> 9 (3 whole chars)");
+		CHECK(to_wire(in, 10).size() == 9, "cap 10 -> 9");
+		CHECK(to_wire(in, 12) == in, "cap 12 -> all 12");
+	}
+
+	// ASCII round-trips against the same cap unchanged.
+	{
+		const std::string in = "Warrior";
+		CHECK(to_wire(in, 24) == in, "ascii under cap unchanged");
+		CHECK(to_wire(std::string(40, 'x'), 24).size() == 24, "ascii over cap -> 24");
+	}
+
+	// --- from_wire_str: stop at NUL, then guard a dangling partial sequence ---
+	{
+		char buf[25] = {};
+		const std::string src = cjk(3); // 9 bytes
+		std::memcpy(buf, src.data(), src.size());
+		CHECK(from_wire_str(buf, sizeof(buf) - 1) == src, "reads up to NUL");
+	}
+	{
+		char buf[25];
+		std::memset(buf, 0, sizeof(buf));
+		const std::string src = cjk(8);
+		std::memcpy(buf, src.data(), src.size());
+		buf[24] = '\xE6'; // 25th byte: lead of a truncated char, no NUL room
+		const std::string got = from_wire_str(buf, 25);
+		CHECK(got == cjk(8), "dangling lead byte trimmed on read");
+	}
+	{
+		// Full 24-byte field, no NUL terminator: read all 8 chars.
+		char buf[24];
+		const std::string src = cjk(8);
+		std::memcpy(buf, src.data(), src.size());
+		CHECK(from_wire_str(buf, 24) == src, "unterminated full field read whole");
+	}
+
+	if (g_fail) {
+		std::fprintf(stderr, "%d checks FAILED\n", g_fail);
+		return 1;
+	}
+	std::puts("net_text_codec_test: OK");
+	return 0;
+}