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Add /duel: friendly duels nobody dies or loses anything in - #81
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Players challenge whoever they look at (or name) with /duel; the target accepts or declines from chat. After a countdown only the two duellists can hurt each other. A blow from the opponent that would kill ends the duel instead, so there is no death, knockout, grave, item drop or strike. When it ends, each duellist gets back the health the other took, plus hunger, saturation, mana, stamina, burning and potion effects as they were at the start. Debuffs they already had stay, so a duel never heals or cleanses more than it cost. Anything outside the duel stays real: a third player or a mob hitting a duellist, or a duellist fighting a mob, interrupts it and only the duel's own damage comes back, so it can't be used as a shield, free heal or free mana. Duellists can't hurt bystanders. /pvp start, a SimpleFactions battle, logging out, dying, leaving survival, moving apart or the time limit end it as a draw. Settings and messages live in the new duel.yml. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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WalkthroughAdds configurable friendly duels between players. The change includes challenge and combat handling, duel-ending conditions, restoration of participant state, and integration with existing PvP and knockout systems. ChangesFriendly duels
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant PlayerA
participant DuelCommand
participant Duels
participant PlayerB
PlayerA->>DuelCommand: Run /duel for PlayerB
DuelCommand->>Duels: Create challenge
Duels->>PlayerB: Send challenge
PlayerB->>DuelCommand: Run accept
DuelCommand->>Duels: Accept challenge
Duels->>PlayerA: Start duel countdown
Duels->>PlayerB: Start duel countdown
Merge Risk: ⚪ Minimal · up to This adds friendly duels with restoration and interruption rules. Nothing in the supplied review evidence points to a concrete merge-blocking problem. Checking event timing on a live server would still be sensible.
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @src/main/java/net/tfminecraft/rpcharacters/pvp/Duels.java:
- Around line 481-502: Update countsForDuel to accept FIRE_TICK, POISON, or
WITHER damage only when its lingering effect is attributable to the duel
opponent; do not classify every event without a causing entity as duel damage.
Preserve or track the effect’s origin so environmental and third-party damage
follows the normal damage path, while opponent-attributed lingering damage
remains eligible for duel settlement.
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📒 Files selected for processing (14)
README.mdsrc/main/java/net/tfminecraft/rpcharacters/RPCharacters.javasrc/main/java/net/tfminecraft/rpcharacters/loaders/DuelLoader.javasrc/main/java/net/tfminecraft/rpcharacters/pvp/Duel.javasrc/main/java/net/tfminecraft/rpcharacters/pvp/DuelCommand.javasrc/main/java/net/tfminecraft/rpcharacters/pvp/DuelSnapshot.javasrc/main/java/net/tfminecraft/rpcharacters/pvp/Duels.javasrc/main/java/net/tfminecraft/rpcharacters/pvp/PvpCommand.javasrc/main/java/net/tfminecraft/rpcharacters/pvp/PvpKnockoutManager.javasrc/main/java/net/tfminecraft/rpcharacters/pvp/PvpSituations.javasrc/main/resources/duel.ymlsrc/main/resources/plugin.ymlsrc/test/java/net/tfminecraft/rpcharacters/RPCharactersStartupTest.javasrc/test/java/net/tfminecraft/rpcharacters/pvp/DuelsTest.java
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Burning, poison and wither with no attacker now count as duel damage only
within 30 seconds of the opponent's last hit, and burning stops counting
once the duellist steps in fire or lava, so lava can still kill.
Ending messages use the names from the start of the duel: a player who
logs out has no character left to name ("Unknown left" on Dev).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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@coderabbitai review Addressed: lingering damage (fire tick, poison, wither) is now attributed — it counts only within 30 s of the opponent's last hit, and fire tick stops counting after the duellist touches fire/lava themselves (tests in |
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Instead of a time window, the duel now records the origin of lingering damage. Burning counts as the opponent's only when they set the duellist alight (EntityCombustByEntityEvent with the opponent or their projectile as combuster); any other ignition takes it back. Poison and wither count only when the effect is applied on the same tick as the opponent's hit or a splash/lingering potion they threw; any other application or removal takes it back. Lingering damage of unknown origin stays on the normal damage path and can kill. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Poison and wither now count as the opponent's only when the effect's cause matches the opponent's action on the same tick: ARROW needs their projectile hit, ATTACK or PLUGIN (skills) needs their hit, POTION_SPLASH or AREA_EFFECT_CLOUD needs a potion they threw. Commands, food, drinks and all other causes never count, so console poison on the same tick as an ordinary hit stays real. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Why
Player suggestion (Estienne, backed by miss nuance): bring back duels so people can spar OOC or IC without it costing health or hunger. Health regenerates slowly, and nonlethal PvP still uses up health and hunger. Last season's duel plugin isn't anywhere we can find, so this adds duels to RPCharacters, which already owns PvP, knockouts, graves and strikes.
What it does
/duelchallenges the player you're looking at;/duel <player>works too. The target gets [Accept] / [Decline] buttons in chat./duel cancelwithdraws,/duel yieldgives up. If you challenge someone who already challenged you, theirs is accepted.DisplayIdentityService, so masks hold, and tab completion never suggests player names.Issues the suggestion didn't cover
/pvp startends the duels of everyone in its radius before it begins. You can't duel while in a/pvp startfight, a started SimpleFactions battle, while knocked out, without an active character, or outside survival/adventure.pvpflag like any fight; they don't override it.Known small trade-off: hunger used while duelling, for up to 10 minutes, is given back even if it was spent walking around.
Config
The new
duel.yml(created on first start, so no manual config step) holds the ranges, timings and every message. It reloads with/rpcharacter reload.Code
pvp/Duelsholds the challenges and duels and the damage rules.pvp/Duelis the per-duel state and damage ledger.pvp/DuelSnapshotrestores the start state.pvp/DuelCommandis the command plus listeners (HIGH screen, MONITOR ledger, quit, death).loaders/DuelLoaderreadsduel.yml.PvpKnockoutManager.onLethalDamagecallsDuels.settleLethalBlowbefore any knockout logic, so a duel's lethal blow never reaches knockouts or strikes.PvpCommandends duels for/pvp starttargets.PvpSituations.involvesis new.Tests
Dev bot test (
~/duel-test/test.json the host, two seeded characters, attacker in nonlethal mode): 23/23 pass. It covers challenge and accept from chat, the lethal duel blow (no death, no knockout, no strike prompt), the opponent's damage given back while generic damage stays, a zombie hit interrupting, duel debuffs removed while an older slowness stays,/pvp startending the duel, the opponent's tipped arrow of strong poison being given back in full while console-applied poison is not, logging out mid-duel, and no RPCharacters exceptions. That run found the "Unknown left" naming bug, now fixed: names are kept from the start of the duel.DuelsTest(12 tests) covers challenge flow, countdown, the lethal blow through the realPvpKnockoutManager, the damage ledger, interruptions, bystanders, projectiles/damage sources, restore rules, every draw reason, quitting, death,/pvp startand command routing. Locallymvn verifypasses all 1726 other tests, with 100% line coverage on the new code. The usual Windows-only POSIX-permission tests were excluded locally; CI runs them.🤖 Generated with Claude Code