I didn’t miss this one, it was just harder to setup than 2009scape since its instructions relied on IntelliJ instead of plain Command Line/Terminal. I got it working and made a pull request with helpful scripts but you can just use the source.
Anyway, onto cheating. The ::commands are sparse but the savefiles are in plain text (.TXT), meaning that you can just logout and edit them (after a refresh since it saves on logout). These can be found at 2006Scape/2006Scape Server/data/characters/
Want all skills at 99/99? Replace [SKILLS] with:
[SKILLS]
character-skill = 0 99 200000000
character-skill = 1 99 200000000
character-skill = 2 99 200000000
character-skill = 3 99 200000000
character-skill = 4 99 200000000
character-skill = 5 99 200000000
character-skill = 6 99 200000000
character-skill = 7 99 200000000
character-skill = 8 99 200000000
character-skill = 9 99 200000000
character-skill = 10 99 200000000
character-skill = 11 99 200000000
character-skill = 12 99 200000000
character-skill = 13 99 200000000
character-skill = 14 99 200000000
character-skill = 15 99 200000000
character-skill = 16 99 200000000
character-skill = 17 99 200000000
character-skill = 18 99 200000000
character-skill = 19 99 200000000
character-skill = 20 99 200000000
character-skill = 21 99 200000000
character-skill = 22 99 200000000
character-skill = 23 99 200000000
character-skill = 24 99 200000000
Want lots of gold and runes? Replace [ITEMS] with:
[ITEMS]
character-item = 0 1352 1
character-item = 1 591 1
character-item = 2 304 1
character-item = 3 1266 1
character-item = 4 1926 1
character-item = 5 1932 1
character-item = 6 2348 1
character-item = 7 996 999999999
character-item = 8 1756 1
character-item = 9 2328 1
character-item = 10 2328 1
character-item = 11 555 999999999
character-item = 13 557 999999999
character-item = 14 559 999999999
character-item = 15 556 999999999
character-item = 16 558 999999998
character-item = 17 560 999999999
character-item = 18 561 999999999
character-item = 19 562 999999999
character-item = 21 563 999999999
character-item = 22 564 999999999
character-item = 23 565 999999999
character-item = 24 566 999999999
character-item = 25 567 999999999
Or just those in the bank? Replace [BANK] with:
[BANK]
character-bank = 0 996 999999999
character-bank = 1 557 999999999
character-bank = 2 559 999999999
character-bank = 3 555 999999999
character-bank = 4 556 999999999
character-bank = 5 558 999999999
character-bank = 6 560 999999999
character-bank = 7 561 999999999
character-bank = 8 562 999999999
character-bank = 9 563 999999999
character-bank = 10 564 999999999
character-bank = 11 565 999999999
character-bank = 12 566 999999999
character-bank = 13 567 999999999
You could also do it with 2009scape, it has JSON files in the 2009Scape/game/data/players/ directory. However those files are huge, making it a lot less convenient.