From 7ea2660335cf203f701454a7699b8f42e938981c Mon Sep 17 00:00:00 2001
From: Houmgaor <contact@houmgaor.com>
Date: Thu, 19 Mar 2026 10:57:09 +0100
Subject: [PATCH] docs(stubs): annotate empty handlers and add unimplemented
 reference doc

Add // stub: unimplemented to 70 empty game-feature handlers and
// stub: reserved to 56 protocol-reserved slots in handlers_reserve.go,
making them discoverable via grep. Add docs/unimplemented.md listing all
unimplemented handlers grouped by subsystem with descriptions.
---
 docs/unimplemented.md                        | 201 +++++++++++++++++++
 server/channelserver/handlers_achievement.go |   8 +-
 server/channelserver/handlers_caravan.go     |   2 +-
 server/channelserver/handlers_cast_binary.go |   2 +-
 server/channelserver/handlers_clients.go     |   4 +-
 server/channelserver/handlers_data.go        |   2 +-
 server/channelserver/handlers_event.go       |   2 +-
 server/channelserver/handlers_guild.go       |   6 +-
 server/channelserver/handlers_house.go       |   2 +-
 server/channelserver/handlers_items.go       |   6 +-
 server/channelserver/handlers_misc.go        |  14 +-
 server/channelserver/handlers_mutex.go       |  10 +-
 server/channelserver/handlers_object.go      |  22 +-
 server/channelserver/handlers_quest.go       |   2 +-
 server/channelserver/handlers_register.go    |   2 +-
 server/channelserver/handlers_reserve.go     | 112 +++++------
 server/channelserver/handlers_reward.go      |   6 +-
 server/channelserver/handlers_session.go     |  36 ++--
 server/channelserver/handlers_stage.go       |   4 +-
 server/channelserver/handlers_tactics.go     |   4 +-
 server/channelserver/handlers_users.go       |   6 +-
 21 files changed, 327 insertions(+), 126 deletions(-)
 create mode 100644 docs/unimplemented.md

diff --git a/docs/unimplemented.md b/docs/unimplemented.md
new file mode 100644
index 000000000..1eb828887
--- /dev/null
+++ b/docs/unimplemented.md
@@ -0,0 +1,201 @@
+# Unimplemented Handlers
+
+Tracks channel server handlers that are empty stubs. Regenerate by searching the source:
+
+```bash
+# All unimplemented game features
+grep -rn "// stub: unimplemented" server/channelserver/handlers_*.go
+
+# All reserved protocol slots
+grep -rn "// stub: reserved" server/channelserver/handlers_reserve.go
+```
+
+All empty handlers carry an inline comment — `// stub: unimplemented` for real game features,
+`// stub: reserved` for protocol message IDs that MHF itself never uses.
+
+---
+
+## Unimplemented (70 handlers)
+
+Grouped by handler file / game subsystem.
+
+### Achievements (`handlers_achievement.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfResetAchievement` | Resets achievement progress for a character |
+| `handleMsgMhfPaymentAchievement` | Achievement reward payout (currency/items) |
+| `handleMsgMhfGetCaAchievementHist` | Fetch CA (cross-platform?) achievement history |
+| `handleMsgMhfSetCaAchievement` | Set CA achievement state |
+
+### Caravan (`handlers_caravan.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfPostRyoudama` | Post/submit Ryoudama (Caravan jewel) data |
+
+### Cast Binary (`handlers_cast_binary.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgSysCastedBinary` | Relay of already-cast binary state (complement to `MsgSysCastBinary`) |
+
+### Client Management (`handlers_clients.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfShutClient` | Server-initiated client disconnect |
+| `handleMsgSysHideClient` | Hide a client session from the session list |
+
+### Data / Auth (`handlers_data.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgSysAuthData` | Supplemental auth data exchange |
+
+### Events (`handlers_event.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfGetRestrictionEvent` | Fetch event-based gameplay restrictions |
+
+### Guild (`handlers_guild.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfUpdateForceGuildRank` | Force-set a guild's rank (admin/GM operation) |
+| `handleMsgMhfUpdateGuild` | Update generic guild metadata |
+| `handleMsgMhfUpdateGuildcard` | Update guild card display data |
+
+### House / My Room (`handlers_house.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfResetTitle` | Reset a character's displayed title |
+
+### Items (`handlers_items.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfGetExtraInfo` | Fetch supplemental item/character info |
+| `handleMsgMhfGetCogInfo` | Fetch Cog (partner Felyne) information |
+| `handleMsgMhfStampcardPrize` | Claim a stamp card prize |
+
+### Misc (`handlers_misc.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfKickExportForce` | Force-kick a character from an export/transfer |
+| `handleMsgMhfRegistSpabiTime` | Register Spabi (practice area?) usage time |
+| `handleMsgMhfDebugPostValue` | Debug value submission (client-side debug tool) |
+| `handleMsgMhfGetDailyMissionMaster` | Fetch daily mission master data (template list) |
+| `handleMsgMhfGetDailyMissionPersonal` | Fetch character's daily mission progress |
+| `handleMsgMhfSetDailyMissionPersonal` | Save character's daily mission progress |
+| `handleMsgMhfUseUdShopCoin` | Spend a UD Shop coin |
+
+### Mutex (`handlers_mutex.go`)
+
+All five mutex handlers are empty. MHF mutexes are distributed locks used for event coordination (Raviente, etc.). The server currently uses its own semaphore system instead.
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgSysCreateMutex` | Create a named distributed mutex |
+| `handleMsgSysCreateOpenMutex` | Create and immediately open a mutex |
+| `handleMsgSysOpenMutex` | Acquire an existing mutex |
+| `handleMsgSysCloseMutex` | Release a mutex |
+| `handleMsgSysDeleteMutex` | Destroy a mutex |
+
+### Object Sync (`handlers_object.go`)
+
+Object sync is partially implemented (create, position, binary set/notify work). The following secondary operations are stubs:
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgSysDeleteObject` | Delete a stage object |
+| `handleMsgSysRotateObject` | Broadcast object rotation |
+| `handleMsgSysDuplicateObject` | Duplicate a stage object |
+| `handleMsgSysGetObjectBinary` | Fetch binary state of a specific object |
+| `handleMsgSysGetObjectOwner` | Get the owning session of an object |
+| `handleMsgSysUpdateObjectBinary` | Update object binary state |
+| `handleMsgSysCleanupObject` | Clean up stale object state |
+| `handleMsgSysAddObject` | Add an object to the stage |
+| `handleMsgSysDelObject` | Remove an object from the stage |
+| `handleMsgSysDispObject` | Display/show a previously hidden object |
+| `handleMsgSysHideObject` | Hide an object from other clients |
+
+### Quests (`handlers_quest.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfEnterTournamentQuest` | Enter a tournament-mode quest |
+
+### Register (`handlers_register.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgSysNotifyRegister` | Notify server of a client-side registration event |
+
+### Rewards (`handlers_reward.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfUseRewardSong` | Use/activate a reward song buff |
+| `handleMsgMhfAddRewardSongCount` | Increment reward song usage counter |
+| `handleMsgMhfAcceptReadReward` | Claim a reward for reading an in-game notice |
+
+### Session (`handlers_session.go`)
+
+Some of these may be intentionally no-ops (e.g. `MsgSysAck` is a client-to-server confirmation that needs no reply). Others are genuine feature gaps.
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgHead` | Raw packet header handler (likely intentional no-op) |
+| `handleMsgSysAck` | Client acknowledgement — no server reply expected |
+| `handleMsgSysSetStatus` | Set session/character status flags |
+| `handleMsgSysEcho` | Protocol echo/ping (no reply needed) |
+| `handleMsgSysUpdateRight` | Update client rights/entitlements |
+| `handleMsgSysAuthQuery` | Auth capability query |
+| `handleMsgSysAuthTerminal` | Terminate auth session |
+| `handleMsgSysTransBinary` | Transfer binary data between clients |
+| `handleMsgSysCollectBinary` | Collect binary data from clients |
+| `handleMsgSysGetState` | Get session state snapshot |
+| `handleMsgSysSerialize` | Serialize session data |
+| `handleMsgSysEnumlobby` | Enumerate available lobbies |
+| `handleMsgSysEnumuser` | Enumerate users in context |
+| `handleMsgSysInfokyserver` | Fetch key server info |
+| `handleMsgCaExchangeItem` | CA (cross-platform) item exchange |
+| `handleMsgMhfServerCommand` | Server-push command to client |
+| `handleMsgMhfSetLoginwindow` | Configure client login window state |
+| `handleMsgMhfGetCaUniqueID` | Fetch CA unique identifier |
+
+### Stage (`handlers_stage.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgSysStageDestruct` | Destroy/teardown a stage |
+| `handleMsgSysLeaveStage` | Client leaving a stage (complement to `handleMsgSysEnterStage`) |
+
+### Tactics / UD (`handlers_tactics.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgMhfSetUdTacticsFollower` | Set UD (Unlimited?) Tactics follower data |
+| `handleMsgMhfGetUdTacticsLog` | Fetch UD Tactics combat log |
+
+### Users (`handlers_users.go`)
+
+| Handler | Notes |
+|---------|-------|
+| `handleMsgSysInsertUser` | Register a new user session |
+| `handleMsgSysDeleteUser` | Remove a user session |
+| `handleMsgSysNotifyUserBinary` | Notify clients of a user binary state change |
+
+---
+
+## Reserved Protocol Slots (56 handlers)
+
+`handlers_reserve.go` contains 56 empty handlers for message IDs that are reserved in the MHF protocol but never sent by any known client version. These are **intentionally empty** and are not missing features.
+
+Two reserve IDs (`188`, `18B`) have partial implementations returning hardcoded responses — they appear in an unknown subsystem and are documented with inline comments in the source.
+
+Full list: `handleMsgSysReserve01–07`, `0C–0E`, `4A–4F`, `55–57`, `5C`, `5E–5F`, `71–7C`, `7E`, `180`, `18E–18F`, `19B–19F`, `1A4`, `1A6–1AF`, `192–194`, `handleMsgMhfReserve10F`.
diff --git a/server/channelserver/handlers_achievement.go b/server/channelserver/handlers_achievement.go
index 4ceb98520..59c717cc7 100644
--- a/server/channelserver/handlers_achievement.go
+++ b/server/channelserver/handlers_achievement.go
@@ -139,7 +139,7 @@ func handleMsgMhfSetCaAchievementHist(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, []byte{0x00, 0x00, 0x00, 0x00})
 }
 
-func handleMsgMhfResetAchievement(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfResetAchievement(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfAddAchievement(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfAddAchievement)
@@ -149,7 +149,7 @@ func handleMsgMhfAddAchievement(s *Session, p mhfpacket.MHFPacket) {
 	}
 }
 
-func handleMsgMhfPaymentAchievement(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfPaymentAchievement(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfDisplayedAchievement(s *Session, p mhfpacket.MHFPacket) {
 	if s.server.achievementService == nil {
@@ -160,6 +160,6 @@ func handleMsgMhfDisplayedAchievement(s *Session, p mhfpacket.MHFPacket) {
 	}
 }
 
-func handleMsgMhfGetCaAchievementHist(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetCaAchievementHist(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgMhfSetCaAchievement(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfSetCaAchievement(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_caravan.go b/server/channelserver/handlers_caravan.go
index e54c8ae9d..d8df0f5dd 100644
--- a/server/channelserver/handlers_caravan.go
+++ b/server/channelserver/handlers_caravan.go
@@ -75,7 +75,7 @@ func handleMsgMhfGetRyoudama(s *Session, p mhfpacket.MHFPacket) {
 	doAckEarthSucceed(s, pkt.AckHandle, data)
 }
 
-func handleMsgMhfPostRyoudama(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfPostRyoudama(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfGetTinyBin(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfGetTinyBin)
diff --git a/server/channelserver/handlers_cast_binary.go b/server/channelserver/handlers_cast_binary.go
index f12da4316..3ea575a0f 100644
--- a/server/channelserver/handlers_cast_binary.go
+++ b/server/channelserver/handlers_cast_binary.go
@@ -162,4 +162,4 @@ func handleMsgSysCastBinary(s *Session, p mhfpacket.MHFPacket) {
 	}
 }
 
-func handleMsgSysCastedBinary(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysCastedBinary(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_clients.go b/server/channelserver/handlers_clients.go
index 23f881e79..cf378949f 100644
--- a/server/channelserver/handlers_clients.go
+++ b/server/channelserver/handlers_clients.go
@@ -109,6 +109,6 @@ func handleMsgMhfOprMember(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfShutClient(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfShutClient(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysHideClient(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysHideClient(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_data.go b/server/channelserver/handlers_data.go
index 6cf5ff3a1..dc3e8989b 100644
--- a/server/channelserver/handlers_data.go
+++ b/server/channelserver/handlers_data.go
@@ -244,4 +244,4 @@ func handleMsgMhfLoadScenarioData(s *Session, p mhfpacket.MHFPacket) {
 	loadCharacterData(s, pkt.AckHandle, "scenariodata", make([]byte, 10))
 }
 
-func handleMsgSysAuthData(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysAuthData(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_event.go b/server/channelserver/handlers_event.go
index a97d301e4..2fb746105 100644
--- a/server/channelserver/handlers_event.go
+++ b/server/channelserver/handlers_event.go
@@ -213,7 +213,7 @@ func handleMsgMhfUseKeepLoginBoost(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, bf.Data())
 }
 
-func handleMsgMhfGetRestrictionEvent(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetRestrictionEvent(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfSetRestrictionEvent(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfSetRestrictionEvent)
diff --git a/server/channelserver/handlers_guild.go b/server/channelserver/handlers_guild.go
index 42241bce6..11b060d41 100644
--- a/server/channelserver/handlers_guild.go
+++ b/server/channelserver/handlers_guild.go
@@ -375,14 +375,14 @@ func handleMsgMhfEntryRookieGuild(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleFail(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfUpdateForceGuildRank(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfUpdateForceGuildRank(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfGenerateUdGuildMap(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfGenerateUdGuildMap)
 	doAckSimpleFail(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfUpdateGuild(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfUpdateGuild(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfSetGuildManageRight(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfSetGuildManageRight)
@@ -447,7 +447,7 @@ func handleMsgMhfOperationInvGuild(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleFail(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfUpdateGuildcard(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfUpdateGuildcard(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 // guildGetItems reads and parses the guild item box.
 func guildGetItems(s *Session, guildID uint32) []mhfitem.MHFItemStack {
diff --git a/server/channelserver/handlers_house.go b/server/channelserver/handlers_house.go
index d0dc03f6c..b032c5e4d 100644
--- a/server/channelserver/handlers_house.go
+++ b/server/channelserver/handlers_house.go
@@ -344,7 +344,7 @@ func handleMsgMhfAcquireTitle(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfResetTitle(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfResetTitle(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func initializeWarehouse(s *Session) {
 	if err := s.server.houseRepo.InitializeWarehouse(s.charID); err != nil {
diff --git a/server/channelserver/handlers_items.go b/server/channelserver/handlers_items.go
index a7a5e8a81..23c3eb6c4 100644
--- a/server/channelserver/handlers_items.go
+++ b/server/channelserver/handlers_items.go
@@ -55,7 +55,7 @@ func handleMsgMhfEnumerateOrder(s *Session, p mhfpacket.MHFPacket) {
 	stubEnumerateNoResults(s, pkt.AckHandle)
 }
 
-func handleMsgMhfGetExtraInfo(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetExtraInfo(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func userGetItems(s *Session) []mhfitem.MHFItemStack {
 	var items []mhfitem.MHFItemStack
@@ -91,7 +91,7 @@ func handleMsgMhfUpdateUnionItem(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfGetCogInfo(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetCogInfo(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfCheckWeeklyStamp(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfCheckWeeklyStamp)
@@ -235,4 +235,4 @@ func handleMsgMhfStampcardStamp(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, bf.Data())
 }
 
-func handleMsgMhfStampcardPrize(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfStampcardPrize(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_misc.go b/server/channelserver/handlers_misc.go
index 603870da5..58f150b99 100644
--- a/server/channelserver/handlers_misc.go
+++ b/server/channelserver/handlers_misc.go
@@ -66,7 +66,7 @@ func handleMsgMhfUnreserveSrg(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfKickExportForce(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfKickExportForce(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfGetEarthStatus(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfGetEarthStatus)
@@ -89,7 +89,7 @@ func handleMsgMhfGetEarthStatus(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, bf.Data())
 }
 
-func handleMsgMhfRegistSpabiTime(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfRegistSpabiTime(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfGetEarthValue(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfGetEarthValue)
@@ -128,7 +128,7 @@ func handleMsgMhfGetEarthValue(s *Session, p mhfpacket.MHFPacket) {
 	doAckEarthSucceed(s, pkt.AckHandle, data)
 }
 
-func handleMsgMhfDebugPostValue(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfDebugPostValue(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfGetRandFromTable(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfGetRandFromTable)
@@ -147,11 +147,11 @@ func handleMsgMhfGetSenyuDailyCount(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, bf.Data())
 }
 
-func handleMsgMhfGetDailyMissionMaster(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetDailyMissionMaster(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgMhfGetDailyMissionPersonal(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetDailyMissionPersonal(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgMhfSetDailyMissionPersonal(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfSetDailyMissionPersonal(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 // Equip skin history buffer sizes per game version
 const (
@@ -215,7 +215,7 @@ func handleMsgMhfGetUdShopCoin(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, bf.Data())
 }
 
-func handleMsgMhfUseUdShopCoin(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfUseUdShopCoin(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfGetEnhancedMinidata(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfGetEnhancedMinidata)
diff --git a/server/channelserver/handlers_mutex.go b/server/channelserver/handlers_mutex.go
index 7ae49b1b3..044eba26a 100644
--- a/server/channelserver/handlers_mutex.go
+++ b/server/channelserver/handlers_mutex.go
@@ -2,12 +2,12 @@ package channelserver
 
 import "erupe-ce/network/mhfpacket"
 
-func handleMsgSysCreateMutex(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysCreateMutex(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysCreateOpenMutex(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysCreateOpenMutex(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysDeleteMutex(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysDeleteMutex(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysOpenMutex(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysOpenMutex(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysCloseMutex(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysCloseMutex(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_object.go b/server/channelserver/handlers_object.go
index ee991161b..64b371152 100644
--- a/server/channelserver/handlers_object.go
+++ b/server/channelserver/handlers_object.go
@@ -38,7 +38,7 @@ func handleMsgSysCreateObject(s *Session, p mhfpacket.MHFPacket) {
 	s.stage.BroadcastMHF(dupObjUpdate, s)
 }
 
-func handleMsgSysDeleteObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysDeleteObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysPositionObject(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysPositionObject)
@@ -63,9 +63,9 @@ func handleMsgSysPositionObject(s *Session, p mhfpacket.MHFPacket) {
 	s.stage.BroadcastMHF(pkt, s)
 }
 
-func handleMsgSysRotateObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysRotateObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysDuplicateObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysDuplicateObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysSetObjectBinary(s *Session, p mhfpacket.MHFPacket) {
 	_ = p.(*mhfpacket.MsgSysSetObjectBinary)
@@ -83,18 +83,18 @@ func handleMsgSysSetObjectBinary(s *Session, p mhfpacket.MHFPacket) {
 	*/
 }
 
-func handleMsgSysGetObjectBinary(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysGetObjectBinary(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysGetObjectOwner(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysGetObjectOwner(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysUpdateObjectBinary(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysUpdateObjectBinary(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysCleanupObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysCleanupObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysAddObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysAddObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysDelObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysDelObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysDispObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysDispObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysHideObject(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysHideObject(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_quest.go b/server/channelserver/handlers_quest.go
index a0ccc873b..61c104555 100644
--- a/server/channelserver/handlers_quest.go
+++ b/server/channelserver/handlers_quest.go
@@ -654,7 +654,7 @@ func getTuneValueRange(start uint16, value uint16) []tuneValue {
 	return tv
 }
 
-func handleMsgMhfEnterTournamentQuest(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfEnterTournamentQuest(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfGetUdBonusQuestInfo(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfGetUdBonusQuestInfo)
diff --git a/server/channelserver/handlers_register.go b/server/channelserver/handlers_register.go
index ed30d154e..68f12edb0 100644
--- a/server/channelserver/handlers_register.go
+++ b/server/channelserver/handlers_register.go
@@ -148,4 +148,4 @@ func (s *Session) notifyRavi() {
 	}
 }
 
-func handleMsgSysNotifyRegister(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysNotifyRegister(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_reserve.go b/server/channelserver/handlers_reserve.go
index 9878a41bd..0277b2346 100644
--- a/server/channelserver/handlers_reserve.go
+++ b/server/channelserver/handlers_reserve.go
@@ -16,114 +16,114 @@ func handleMsgSysReserve18B(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, []byte{0x00, 0x00, 0x00, 0x3C})
 }
 
-func handleMsgSysReserve55(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve55(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve56(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve56(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve57(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve57(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve01(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve01(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve02(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve02(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve03(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve03(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve04(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve04(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve05(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve05(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve06(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve06(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve07(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve07(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve0C(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve0C(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve0D(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve0D(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve0E(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve0E(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve4A(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve4A(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve4B(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve4B(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve4C(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve4C(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve4D(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve4D(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve4E(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve4E(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve4F(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve4F(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve5C(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve5C(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve5E(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve5E(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve5F(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve5F(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve71(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve71(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve72(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve72(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve73(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve73(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve74(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve74(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve75(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve75(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve76(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve76(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve77(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve77(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve78(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve78(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve79(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve79(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve7A(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve7A(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve7B(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve7B(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve7C(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve7C(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve7E(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve7E(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgMhfReserve10F(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfReserve10F(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve180(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve180(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve18E(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve18E(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve18F(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve18F(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve19E(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve19E(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve19F(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve19F(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1A4(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1A4(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1A6(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1A6(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1A7(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1A7(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1A8(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1A8(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1A9(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1A9(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1AA(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1AA(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1AB(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1AB(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1AC(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1AC(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1AD(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1AD(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1AE(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1AE(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve1AF(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve1AF(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve19B(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve19B(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve192(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve192(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve193(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve193(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
 
-func handleMsgSysReserve194(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysReserve194(s *Session, p mhfpacket.MHFPacket) {} // stub: reserved
diff --git a/server/channelserver/handlers_reward.go b/server/channelserver/handlers_reward.go
index a25035818..9e6a04cdf 100644
--- a/server/channelserver/handlers_reward.go
+++ b/server/channelserver/handlers_reward.go
@@ -30,9 +30,9 @@ func handleMsgMhfGetRewardSong(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, data)
 }
 
-func handleMsgMhfUseRewardSong(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfUseRewardSong(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgMhfAddRewardSongCount(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfAddRewardSongCount(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfAcquireMonthlyReward(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfAcquireMonthlyReward)
@@ -43,4 +43,4 @@ func handleMsgMhfAcquireMonthlyReward(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, resp.Data())
 }
 
-func handleMsgMhfAcceptReadReward(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfAcceptReadReward(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_session.go b/server/channelserver/handlers_session.go
index 847478bcb..adc312776 100644
--- a/server/channelserver/handlers_session.go
+++ b/server/channelserver/handlers_session.go
@@ -18,7 +18,7 @@ import (
 	"go.uber.org/zap"
 )
 
-func handleMsgHead(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgHead(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysExtendThreshold(s *Session, p mhfpacket.MHFPacket) {
 	// No data aside from header, no resp required.
@@ -32,7 +32,7 @@ func handleMsgSysNop(s *Session, p mhfpacket.MHFPacket) {
 	// No data aside from header, no resp required.
 }
 
-func handleMsgSysAck(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysAck(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysTerminalLog(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysTerminalLog)
@@ -379,7 +379,7 @@ func logoutPlayer(s *Session) {
 	)
 }
 
-func handleMsgSysSetStatus(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysSetStatus(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysPing(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysPing)
@@ -458,7 +458,7 @@ func handleMsgSysRecordLog(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgSysEcho(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysEcho(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysLockGlobalSema(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysLockGlobalSema)
@@ -481,11 +481,11 @@ func handleMsgSysUnlockGlobalSema(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgSysUpdateRight(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysUpdateRight(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysAuthQuery(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysAuthQuery(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysAuthTerminal(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysAuthTerminal(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysRightsReload(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysRightsReload)
@@ -752,9 +752,9 @@ func handleMsgMhfTransitMessage(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, resp.Data())
 }
 
-func handleMsgCaExchangeItem(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgCaExchangeItem(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgMhfServerCommand(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfServerCommand(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgMhfAnnounce(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgMhfAnnounce)
@@ -762,20 +762,20 @@ func handleMsgMhfAnnounce(s *Session, p mhfpacket.MHFPacket) {
 	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
-func handleMsgMhfSetLoginwindow(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfSetLoginwindow(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysTransBinary(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysTransBinary(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysCollectBinary(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysCollectBinary(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysGetState(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysGetState(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysSerialize(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysSerialize(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysEnumlobby(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysEnumlobby(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysEnumuser(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysEnumuser(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysInfokyserver(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysInfokyserver(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgMhfGetCaUniqueID(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetCaUniqueID(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_stage.go b/server/channelserver/handlers_stage.go
index c2780a5f6..b3f98a2ad 100644
--- a/server/channelserver/handlers_stage.go
+++ b/server/channelserver/handlers_stage.go
@@ -23,7 +23,7 @@ func handleMsgSysCreateStage(s *Session, p mhfpacket.MHFPacket) {
 	}
 }
 
-func handleMsgSysStageDestruct(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysStageDestruct(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func doStageTransfer(s *Session, ackHandle uint32, stageID string) {
 	stage, created := s.server.stages.GetOrCreate(stageID)
@@ -265,7 +265,7 @@ func handleMsgSysMoveStage(s *Session, p mhfpacket.MHFPacket) {
 	doStageTransfer(s, pkt.AckHandle, pkt.StageID)
 }
 
-func handleMsgSysLeaveStage(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysLeaveStage(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysLockStage(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysLockStage)
diff --git a/server/channelserver/handlers_tactics.go b/server/channelserver/handlers_tactics.go
index 5ef45913c..7ad787995 100644
--- a/server/channelserver/handlers_tactics.go
+++ b/server/channelserver/handlers_tactics.go
@@ -60,6 +60,6 @@ func handleMsgMhfGetUdTacticsRanking(s *Session, p mhfpacket.MHFPacket) {
 	doAckBufSucceed(s, pkt.AckHandle, data)
 }
 
-func handleMsgMhfSetUdTacticsFollower(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfSetUdTacticsFollower(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgMhfGetUdTacticsLog(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgMhfGetUdTacticsLog(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
diff --git a/server/channelserver/handlers_users.go b/server/channelserver/handlers_users.go
index deb571871..d2f2f7fb0 100644
--- a/server/channelserver/handlers_users.go
+++ b/server/channelserver/handlers_users.go
@@ -5,9 +5,9 @@ import (
 	"go.uber.org/zap"
 )
 
-func handleMsgSysInsertUser(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysInsertUser(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
-func handleMsgSysDeleteUser(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysDeleteUser(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented
 
 func handleMsgSysSetUserBinary(s *Session, p mhfpacket.MHFPacket) {
 	pkt := p.(*mhfpacket.MsgSysSetUserBinary)
@@ -35,4 +35,4 @@ func handleMsgSysGetUserBinary(s *Session, p mhfpacket.MHFPacket) {
 	}
 }
 
-func handleMsgSysNotifyUserBinary(s *Session, p mhfpacket.MHFPacket) {}
+func handleMsgSysNotifyUserBinary(s *Session, p mhfpacket.MHFPacket) {} // stub: unimplemented