Coder v2.4.5

The most powerful scripting engine for Minecraft. Run Java, Lua, and Python natively on your server with real-time web editing.

🚀 What's New in v2.4.5

• New CoderAPI Addon Workers/Helpers:

  • Added CoderWorker, a lightweight helper/background-task interface that addons can expose via getWorker() to run recurring logic without managing their own scheduler.
  • AddonManager now automatically starts an addon's worker right after the addon is registered (onLoad()/fireAddonLoad) and automatically stops it before the addon's onDisable() runs — no manual bookkeeping required on the addon's side.
  • Workers can also be registered and managed by hand through CoderAPI for addons that want a worker independent of their own lifecycle:
    • registerWorker(CoderWorker) – registers and immediately starts a worker, cancelling any prior task with the same name first.
    • unregisterWorker(String name) – stops and removes a worker by name.
    • getWorker(String name) / getWorkers() – look up a registered worker or view them all.
    • isWorkerRunning(String name) – check whether a worker's scheduled task is still active.
  • A CoderWorker controls its own timing and threading via getIntervalTicks(), getInitialDelayTicks(), and isAsync(), and gets onStart()/onStop() lifecycle hooks around its repeating run().

• Expanded CoderAPI:

  • Per-player cooldown system — setCooldown(player, key, durationTicks), isOnCooldown(player, key), getRemainingCooldown(player, key), clearCooldown(player, key), clearAllCooldowns(player). Cooldowns are tracked per player UUID and per string key, so addons can run independent cooldowns (abilities, commands, kits, etc.) without colliding.
  • Block helpers — getBlockType(location), setBlock(location, materialName), isBlockType(location, materialName), breakBlockNaturally(location) for quick block reads/writes from scripts and addons without touching Bukkit's Block API directly.
  • Chat/text helpers — colorize(message) converts &-coded strings to usable § color codes, and stripColor(message) removes color codes entirely for logging, storage, or plain-text comparisons.

🛠 Features

Scripting Engine

• Native Multi-Language Support: Write and execute scripts in Java, Python, and Lua directly on your Minecraft server — no external processes or bridges.
• Unified Workspace: All scripts, regardless of language, live under a single organized Coder/scripts/ folder.
• In-Memory Java Execution: Load Java code directly into server memory (/coder load) so listeners and background processes defined in scripts keep running like a normal plugin component, without needing a restart.
• Clean Cache Directory: Compiled .class files are cleanly separated:
  • Temporary runtime files: Coder/JavaClass/Runtime/
  • Loaded persistent files: Coder/JavaClass/Loaded/
• User Execution Control (UEC): An active security layer that intercepts unauthorized scripts before they run. Regardless of language, nothing executes without UEC verification — operators can /coder confirm or /coder cancel flagged scripts.

Addon System (CoderAPI)

• Addon Registry: Any plugin can hook into Coder as an addon by implementing CoderAddon and either depending/soft-depending on Coder or matching the legacy me.coder.api classpath (with an automatic warning nudging authors toward the current dev.codestuff.coder.api path).
• Version & Dependency Gating: AddonManager checks each addon's declared getMinCoderVersion() and inter-addon getDependencies() before loading, skipping (with a clear log warning) anything that isn't satisfied.
• Workers/Helpers: Addons can expose a CoderWorker (see above) for recurring background work that's fully managed by AddonManager — started on load, stopped on unload, sync or async.
• Custom Execution Handlers: Addons can register their own JavaExecutionHandler and/or ScriptExecutionHandler implementations for Java, Python, and Lua, plus per-language ScriptPreprocessor/ScriptPostprocessor hooks.
• Custom Commands, Events & Tab Completion: Addons can register subcommands (CoderCommandHandler), listen to Coder's own lifecycle events (CoderEventListener — script start/end/error, addon load/unload, command execution), and contribute tab completion (CoderTabCompleter).
• Shared Data Store: A per-addon key/value store (setAddonData/getAddonData/getAllAddonData) for lightweight state that doesn't need its own file.
• Auto-Tick & Auto-Save: Addons can opt into a per-tick callback (wantsTick()/onTick()) or a periodic autosave (shouldAutoSave()/getAutoSaveInterval()/onSave()), both scheduled automatically by AddonManager.

Utilities Exposed via CoderAPI

• Messaging: Prefixed success/error/info/warning/debug messages and broadcasts to all online players plus console.
• Players: Health, food, level/exp, game mode, permissions, teleporting, kicking, and location/world lookups.
• Inventory/Items: Give, remove, count, and check items by material name, plus full inventory clearing.
• Effects: Sounds, particles, action bars, and titles.
• Scoreboard: Simple sidebar creation and clearing.
• Scheduler: Sync, delayed, async, and repeating task helpers wrapped around Bukkit's scheduler.
• Cooldowns, Blocks, and Chat helpers: See "What's New" above.
• Server Info: MOTD, Bukkit/Minecraft version, TPS, MSPT, tick count, and plugin lookups.

Operations

• Dual Backup Systems: Automated scheduled backups paired with instant manual snapshots (/coder backup, /coder auto-backup-start/stop).
• Graphical Web Interface (GWI): Securely manage, edit, and delete files on your server from a remote web browser.
• Virtual Console Interface (VCI): Run server commands remotely and securely via https://coder-gwieditor.firesmasher.workers.dev/mc-console?=YOUR_TOKEN_HERE.
• Java 25 Support: A dedicated java-25 build is available for servers running newer JVMs.
• Extra Useful Utilities: Script access to JetBrains annotations, NBT-API, and Commons Lang3, among others.

🛡 GWI Editor Security

The remote GWI Editor is highly secure. Session connections leverage SHA-256 tokens which are mathematically impossible to brute-force or guess. Every session token also automatically expires after 30 minutes of inactivity.

🛡 Virtual Console Interface Security

The custom Minecraft console panel blocks /op commands and is secured by SHA-256 server password tokens. To disable this feature, go to /plugins/Coder/.gwi/secure/serverPassword.env and remove the value of serverPassword=.

📖 Quick Start

Workspace Directories

Drop your scripts and check execution logs in the following directories:

Command Reference

Script Management

• /coder run <filename> – Executes a specified script.
• /coder load <filename> – Loads and compiles a script directly into Server Memory.
• /coder unload <filename> – Unloads an active script from Server Memory.
• /coder reload <filename> – Reloads a specific script's configuration.

Security & UEC

• /coder confirm – Manually permits a script flagged by the User Execution Control.
• /coder cancel – Blocks and cancels a script caught by the UEC.

GWI Web Editor

• /coder editor start – Spawns a secure SHA-256 link to access the GWI Web Editor.
• /coder editor trust <username> – Grants access to a pending connection request.
• /coder editor do-not-trust <username> – Denies access to a connection request.
• /coder editor stop – Terminates the active GWI Web Editor session immediately.

Virtual Console Interface

• /coder gen-pass - Generates a unique SHA-256 server password to access /mc-console/.

System & Maintenance

• /coder backup – Triggers an immediate manual backup of your script directory.
• /coder auto-backup-start – Starts the automated scheduler for background backups.
• /coder auto-backup-stop – Halts the background backup scheduler.
• /coder reload-config – Hot-reloads the main config.yml file.
• /coder update – Checks for updates and retrieves a download link.
• /coder update-jar – Automatically downloads and replaces the plugin JAR file.
• /coder enable-activity-logging – Enables activity logging.
• /coder disable-activity-logging – Disables activity logging.

Coderc (Coder Compiler)

• /coderc run <filename.class> - Runs a .class file.
• /coderc compile <filename.java> - Compiles a .java into .class
• Aliases:

  /cojav, /cjavac, /cjava, /codec