Combat Logic adds ARPG-style mechanics on top of vanilla combat—without replacing it. Spend stamina on dodges and skills, raise combo rank (E→SSS) for damage and regeneration bonuses, and read everything from a compact top-right HUD.

Hostile mobs show localized names and current/max HP. A vertical action feed (up to four lines) replaces chat spam for combat feedback. Parry works against mobs and players (PvP), with a 3-second cooldown after each successful parry.

World owners can scale hostile HP. Each player can disable combo or stamina/actions independently. All settings are in one DDUI menu (/combatlogic:cl_settings)—HUD, combo, actions, world difficulty, and new-player defaults (operators). Uses Script API (main (beta), @minecraft/server-ui, and custom commands.

Core systems

Stamina

Maximum: 100
Base regen: 1 every 25 ticks (not during roll i-frames)
Combo rank regen bonus (combo system ON for that player):

Rank	Multiplier	Typical regen / pulse
E	×1.00	1
D	×1.12	1
C	×1.25	1
B	×1.40	1
A	×1.60	2
S	×1.85	2
SS	×2.15	2
SSS	×2.50	3

Creative / Spectator: exempt from combat ticks.

Dodge

Move	Input	STA	Notes
Roll	Sneak + Jump	28	~14 tick i-frames, forward dash
Step	Move, then sneak within ~0.5 s	14	Sidestep; longer distance

Per-move cooldowns: roll 22 ticks, step 12 ticks.

Parry (shield only)

Open parry window (~10 ticks / 0.5 s)

Start blocking with shield, or
Sneak + shield when about to be hit (window opens on hurt check)

Successful parry requires

Actions system ON
Shield equipped (main or off hand)
Active parry window
Damage: melee (entityAttack) or projectile
Attacker: any entity (mobs and players / PvP)
Not on parry cooldown

On success

Cancel that hit’s damage
Stun attacker ~3 s (slowness + weakness, 60 ticks)
VFX / sound
HUD feed: Parry
3 s parry cooldown (60 ticks): no new window, no success until it ends

Does not work: fire, fall, explosion, etc.; no stamina cost for parry.

Action skills

Skill	Input	STA	Effect
Focus	Double-tap sneak (melee weapon)	18	Next hit ×1.5 damage
Uppercut	Attack during jump window	12	Launch + knockback

Blocked with shield, bow, food, bucket, etc.

Combo

+1 per hit; reset after 60 ticks (~3 s) without a hit
Ranks E→SSS at 1 / 2 / 5 / 10 / 20 / 40 / 70 hits
Damage: +5% per hit after the first, cap +500%
Brief rank-up flash on HUD

Enemy HP

Hostile mobs only
Two-line name tag: localized name + cur/max HP
Refresh on spawn, hurt, proximity
Clears custom name before mob kills player (death message fix)

Difficulty (world)

Mode	Hostile HP
normal	×1
hard	×3
insane	×5

World-stored; reapplied when changed.

HUD (top-right)

Panel: 168×58 px, ui/hud_screen.json, text via title prefix CLHUD:

Section	Content	Hidden when
STA	Bar + %	Actions OFF
CB	Rank, hits, mult	Combo OFF
LINK	Combo timeout bar	Combo OFF
» lines	Action feed (max 4, one event per line, ~2.5 s each)	HUD OFF

Action feed events: Roll, Step, Parry, Focus, Uppercut, STA depleted — not in chat.

Toggle: /combatlogic:cl_settings (recommended) or /combatlogic:cl_hud

Settings menu (DDUI)

Open with /combatlogic:cl_settings. One reactive form for:

Section	Who	Controls
Your settings	All players	HUD, Combo, Stamina & actions (toggles)
World	Operator	Hostile HP scale (Normal / Hard / Insane)
New player defaults	Operator	Default HUD, combo, actions for first join

Changes apply when you close the menu or tap Apply now. Falls back to a classic modal form if DDUI is unavailable. Legacy toggle commands still work.

Custom commands

Namespace: combatlogic:
Enums: combatlogic:difficulty, combatlogic:toggle
Return messages: plain strings.

Command	Permission	Description
`/combatlogic:cl_settings`	Any	Open settings menu (DDUI)
`/combatlogic:cl_help`	Any	Controls + commands (chat)
`/combatlogic:cl_hud`	Any	Toggle HUD
`/combatlogic:cl_difficulty <normal\|hard\|insane>`	Operator	World mob HP scale
`/combatlogic:cl_difficulty_show`	Any	Current multiplier
`/combatlogic:cl_combo [on\|off\|status]`	Any	Combo system; no arg = toggle
`/combatlogic:cl_stamina [on\|off\|status]`	Any	Stamina + dodge + parry + skills
`/combatlogic:cl_actions …`	Any	Alias of `cl_stamina`
`/combatlogic:cl_defaults …`	Operator	New-player defaults (also in settings menu)

HUD compatibility

Likely conflicts: other packs editing hud_screen.json → hud_content; scripts constantly driving title / subtitle.
Moderate: persistent actionbar bars, large right scoreboard.
Usually fine: chat-only, worldgen, texture packs.

Put Combat Logic RP above other HUD RPs; test with others disabled if layout breaks.