CMD_DEVELOP_SERVER_ITEM fails with "unknown command"

[gncnpk]

time=2025-08-17T21:55:48.724-05:00 level=INFO source=github.com/unknown321/fuse/handlers/gate.go:234 msg="client request" passthrough=false ip=127.0.0.1:54203

time=2025-08-17T21:55:48.724-05:00 level=INFO source=github.com/unknown321/fuse/message/message.go:478 msg=message type=CMD_DEVELOP_SERVER_ITEM

time=2025-08-17T21:55:48.724-05:00 level=INFO source=github.com/unknown321/fuse/sessionmanager/sessionmanager.go:674 msg="handling message" type=CMD_DEVELOP_SERVER_ITEM override=true request=true

time=2025-08-17T21:55:48.724-05:00 level=ERROR source=github.com/unknown321/fuse/sessionmanager/sessionmanager.go:456 msg="unknown command" 
command=CMD_DEVELOP_SERVER_ITEM

time=2025-08-17T21:55:48.724-05:00 level=INFO source=github.com/unknown321/fuse/handlers/gate.go:299 msg="client request handled" type=CMD_DEVELOP_SERVER_ITEM ip=127.0.0.1:54203

[unknown321]

not implemented yet

[gncnpk]

How can I help reverse engineer new commands?

[unknown321]

1. Patch mgsvtpp.exe with -clientURL option
2. Put fuse into proxy mode with -writeLog and -passThrough options
3. Launch the game, do things, read the logs

CMD_DEVELOP_SERVER_ITEM request:

{
    "id": 6063,
    "msgid": "CMD_DEVELOP_SERVER_ITEM",
    "rqid": 0,
    "server_item_platform_info": {
        "platform_base_rank": 6,
        "special_soldier_type_list": [
            10,
            10,
            10,
            10,
            10,
            10,
            10,
            10
        ]
    }
}

The problem is not the jsons themselves, but how server handles them. Development items must be saved into database, checked if already developed, there must be a development timer (matching regular game timer), mb coin calculation (decreases over time I think?), development tree unlocks etc etc. Currently I am focused on dynamite and cannot pay attention to fuse; if you need new coop items, I suggest downloading 100% save file from somewhere and using it instead.