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Combat Toggle

A server-installable PvP opt-in system with combat tagging, smart cooldowns, and a full admin toolkit — for Minecraft 1.19.2 Forge.

Combat Toggle lets every player on your server choose whether they can be attacked. It's a ship-it-on-a-modpack solution for the "some players want PvP, some don't" problem — no world-border workarounds, no region plugins, no third-party dependencies. Install it on your dedicated server and vanilla clients can join and use /ct without touching their game.

What it does

• Peace mode — PvP is off. Other players' arrows, swords, potions, and projectiles pass harmlessly.
• Combat mode — PvP is on. You can be hit, and you can hit back.
• Each player decides independently. The default is Peace — new players must opt in.
• Server-installable. Vanilla clients can join and use /ct to flip modes with no client install. Modded clients additionally get a rebindable V keybind and an on-screen HUD indicator.

Features

Core

• Universal commands. /ct, /combat, /peace, and /combattoggle status work from any client — modded or vanilla.
• One-key toggle. Default keybind: V (modded clients only). Fully rebindable per-client.
• HUD overlay. 51×19 pixel-art icon (shield for Peace, crossed swords for Combat). Configurable position (9-anchor + custom XY), scale, and per-mode visibility. Hides automatically in inventories and when the HUD is toggled off with F1.
• Combat tagging. Any PvP engagement tags both attacker and victim for a configurable duration (default 30s). While tagged, a player cannot switch to Peace mode — no combat-logging via the toggle.
• Smart cooldowns. By default, the cooldown starts only when PvP actually happens, not when players toggle. Players can freely switch modes while farming, building, or exploring.
• Persistent state. Mode, tag timer, and cooldown survive logouts, respawns, dimension changes, and server restarts. Stored on a Forge capability serialized to player data.
• Dual-event PvP enforcement. Primary cancel at LivingAttackEvent (HIGH priority) — knockback, hurt sound, and the PLAYER_HURT_ENTITY advancement criterion never fire on Peace targets. LivingHurtEvent runs as defence-in-depth. Attacker resolution walks projectile owners, primed-TNT owners, and tamed pets, so wolves, snow golems, and ignited TNT are correctly attributed.

Social

• Nameplate coloring. Players in Combat mode get red nameplates; Peace players get blue. Disable if you already use scoreboard teams for something else.
• Emoji/text prefixes. Configurable glyphs (defaults: crossed swords and a coffee mug) appear before the player name so the state is unmistakable from any angle.
• Throttled feedback. Attackers who hit a peace-mode target get a one-line chat message explaining why nothing happened (throttled so it never spams).

Player commands

No permissions required.

Admin commands

Require OP level 2.

For server owners and modpack authors

• Capability-backed state. Player data lives on a Forge capability (CombatToggleData); same in-memory instance for the player's whole session, no per-call NBT churn. There's no public API today, but a future minor can expose one without re-architecting.
• Structured SLF4J logging at DEBUG/INFO for every PvP decision, toggle request, and command invocation. Plays nicely with ops pipelines.
• Translation-driven messages. Every player-facing string is a translation key (combattoggle.msg.*). Ship translations without code patches.
• Vanilla-tolerant network handshake. The channel uses NetworkRegistry.acceptMissingOr(PROTOCOL::equals); vanilla clients pass through, sync packets are dropped silently to peers without the channel.

Installation

1. Install Minecraft Forge 43.3.0+ for Minecraft 1.19.2.
2. Drop combattoggle-1.2.0.jar into your server's (or client's) mods/ folder.
3. Launch. On first run, combattoggle-server.toml is generated in your world's serverconfig/ directory and combattoggle-client.toml in the client config folder.

Server-installable? Yes. Install on the dedicated server only and vanilla clients can join and use /ct, /combat, /peace, and /combattoggle status with no client-side install. Players who additionally install the mod client-side get the V keybind and the HUD indicator on top — eye candy over the same server-authoritative logic.

Configuration

combattoggle-server.toml

combattoggle-client.toml

Upgrading from 1.1.x

• Mode is preserved. Whatever mode (Combat or Peace) each player was last in carries through on first 1.2.0 login.
• In-flight tags and cooldowns reset on first 1.2.0 login. The 1.1.x persistent timers were wall-clock milliseconds with no clock-source guarantee; converting them to the new game-tick clock isn't safe, so they're dropped. New tags/cooldowns from 1.2.0 onward use a monotonic, restart-safe game-tick deadline.
• The showHud server config key is gone. HUD visibility is purely client-side now via hudEnabled in combattoggle-client.toml. Existing operator configs keep the orphan key on first read; Forge logs an unused-key warning. Harmless.
• Network protocol is "1" for the 1.2.x line. 1.1.x modded clients cannot connect to a 1.2.0 server (handshake rejects); they need to upgrade. Vanilla clients are unaffected.

Compatibility

• Minecraft: 1.19.2
• Forge: 43.3.0 or newer
• Java: 17
• Dependencies: None. No Kotlin, no Architectury, no Cloth Config.
• Other PvP mods: Should coexist with anti-cheat, region protection, and KubeJS. useScoreboardTeams=false resolves conflicts with mods that own the scoreboard.
• Multiplayer-only? No. Single-player works; the toggle still applies to damage interactions with hostile iron golems, etc. (as you'd expect for "PvP enabled/disabled").

Known limitations

• Mixin-based damage sources may bypass enforcement. Combat Toggle cancels at both LivingAttackEvent (primary) and LivingHurtEvent (fallback). A handful of mods route damage through custom mixins that bypass both — those will hit Peace targets. Open an issue with a reproduction if you hit this.
• No dimension allowlist. PvP rules apply uniformly across every dimension.
• /combat and /peace are common literal namespaces. If another mod or plugin registers the same root, behavior depends on registration order — fall back to /ct and /combattoggle <subcmd>.
• No public mod-integration API today. Player state lives on an internal Forge capability; a future minor can expose it without re-architecting.
• Vanilla clients have no HUD or keybind. Use /ct. By design.

License & Source

• License: GPL-3.0
• Source & issues: https://github.com/otectus/combat-toggle
• Modpack home: Built for the Runecraft 1.19.2 Forge modpack. Drop it into anything else — it's standalone.

Pull requests and bug reports welcome. Please include server logs, your combattoggle-server.toml, and a minimal repro when filing an issue.