Adds build status badge.

Updated Gradle CI workflow to use newer action versions and added project version extraction step.

.env.example

@@ -0,0 +1,26 @@
+# Configuration for tools/*.sh. Values are read as KEY=value data, not executed.
+# Unquoted values may contain spaces; matching outer quotes are removed.
+
+# Paper server
+PAPER_VERSION=26.2
+PAPER_BUILD=129
+PAPER_USER_AGENT="majinnaibu-plugin-dev/1.0 (https://github.com/majinnaibu)"
+JAVA_OPTS="-Xms2G -Xmx2G"
+STOP_TIMEOUT=60
+MINECRAFT_SERVER_JAR=paper-26.2-129.jar
+
+# Relative paths are resolved from the project root; ~/ is expanded.
+MINECRAFT_SERVER_PATH=./server
+MINECRAFT_BACKUP_PATH=./backups
+
+# Modrinth publishing
+# Release version is read from Gradle and checked against the jar's plugin.yml.
+MODRINTH_TOKEN=
+MODRINTH_PROJECT_ID=5NYwxysp
+# Optional Markdown override; empty generates notes from commits since the last tag.
+MODRINTH_CHANGELOG=
+MODRINTH_GAME_VERSIONS=26.2,26.3
+MODRINTH_LOADERS=paper
+MODRINTH_VERSION_TYPE=
+MODRINTH_DEPENDENCIES=
+MODRINTH_FILE=

.github/workflows/gradle.yml

@@ -0,0 +1,45 @@
+name: Java CI with Gradle
+
+on:
+  push:
+    branches: [ "develop" ]
+  pull_request:
+    branches: [ "develop" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v6
+        with:
+          java-version: '25'
+          distribution: 'temurin'
+
+      - name: Setup Gradle 9.8.0
+        uses: gradle/actions/setup-gradle@v5
+        with:
+          gradle-version: '9.8.0'
+          cache-read-only: ${{ github.ref != 'refs/heads/develop' }}
+
+      - name: Build with Gradle Wrapper
+        run: ./tools/build-plugin.sh
+
+      - name: Extract Project Version
+        id: project_info
+        run: |
+          VERSION=$(./gradlew properties --no-daemon -q | awk -F ': ' '$1 == "version" {print $2}')
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+      - name: Upload Plugin Artifact
+        uses: actions/upload-artifact@v7
+        with:
+          name: ScoreKeeper-${{ steps.project_info.outputs.version }}
+          path: build/libs/*.jar
+          if-no-files-found: error
+          retention-days: 14

.gitignore

@@ -3,3 +3,6 @@ build/
 target/
 .worktrees/
 bin/
+/backups/
+/server/
+.env

CONTRIBUTING.md

@@ -12,9 +12,9 @@ Setup our project folder.
 ```bash
 PROJECTS_DIR="$HOME/Projects"
 MINECRAFT_SERVER_PATH="$PROJECTS_DIR/MCServer"
-# Set this to the latest download url on the Paper downloads page [https://papermc.io/downloads](https://papermc.io/downloads) and update the jar name.
+# Use Paper 26.2 or 26.3 only. The project helper scripts resolve the configured Paper build.
-MINECRAFT_SERVER_DOWNLOAD_URI="https://fill-data.papermc.io/v1/objects/fb73c7e310215016955617ab957022d9e1d47aeba206df3a98c5ecb43756527c/paper-1.21.8-25.jar"
+MINECRAFT_SERVER_DOWNLOAD_URI=""
-MINECRAFT_SERVER_JAR="paper-1.21.8-25.jar"
+MINECRAFT_SERVER_JAR="paper-26.2-129.jar"
 mkdir -p "$MINECRAFT_SERVER_PATH"
 # Keep this shell open we will use these variables later.
 ```
@@ -23,9 +23,9 @@ mkdir -p "$MINECRAFT_SERVER_PATH"
 ```powershell
 $projectsDir="$HOME\Projects"
 $minecraftServerDir="$projectsDir\MCServer"
-# Set this to the latest download url on the Paper downloads page [https://papermc.io/downloads](https://papermc.io/downloads) and update the jar name.
+# Use Paper 26.2 or 26.3 only. The project helper scripts resolve the configured Paper build.
-$minecraftServerDownloadUri="https://fill-data.papermc.io/v1/objects/fb73c7e310215016955617ab957022d9e1d47aeba206df3a98c5ecb43756527c/paper-1.21.8-25.jar"
+$minecraftServerDownloadUri=""
-$minecraftServerJar="paper-1.21.8-25.jar"
+$minecraftServerJar="paper-26.2-129.jar"
 New-Item -Type Directory $projectsDir
 New-Item -Type Directory $minecraftServerDir
 # Keep this shell open we will use these variables later.
@@ -34,18 +34,18 @@ New-Item -Type Directory $minecraftServerDir
 ## Install the JDK
 **Linux / WSL**
 ```bash
-apt install openjdk-21-jdk
+apt install openjdk-25-jdk
 ```
 
 **macOS**
 ```zsh
-brew install --cask microsoft-openjdk@21
+brew install --cask microsoft-openjdk@25
 ```
 
 **Windows**
 From Powershell
 ```powershell
-winget install --id Microsoft.OpenJDK.21 --source winget
+winget install --id Microsoft.OpenJDK.25 --source winget
 ```
 
 ## Setup a PaperMC Server
@@ -108,7 +108,7 @@ Our scripts depend on two environment variables. You can set them each time you
 To set them for the current session run these commands. To set for every new session add these commands to your `.bashrc` or `.zshrc` file.
 ```bash
 MINECRAFT_SERVER_PATH="$HOME/Projects/MCServer"
-MINECRAFT_SERVER_JAR="paper-1.21.8-25.jar"
+MINECRAFT_SERVER_JAR="paper-26.2-129.jar"
 ```
 
 **Windows**
@@ -116,13 +116,13 @@ MINECRAFT_SERVER_JAR="paper-1.21.8-25.jar"
 To set them for a single session run these commands.
 ```powershell
 $env:MINECRAFT_SERVER_PATH = "$HOME\Projects\MCServer"
-$env:MINECRAFT_SERVER_JAR = "paper-1.21.8-25.jar"
+$env:MINECRAFT_SERVER_JAR = "paper-26.2-129.jar"
 ```
 
 If you want them available in all of your powershell sessions you can set them permanently like this.
 ```powershell
 [Environment]::SetEnvironmentVariable("MINECRAFT_SERVER_PATH", "$HOME\Projects\MCServer", "User")
-[Environment]::SetEnvironmentVariable("MINECRAFT_SERVER_JAR", "paper-1.21.8-25.jar", "User")
+[Environment]::SetEnvironmentVariable("MINECRAFT_SERVER_JAR", "paper-26.2-129.jar", "User")
 ```
 
 ### Start-Server.ps1 and start-server.sh

Human-Tests.md

@@ -0,0 +1,55 @@
+# ScoreKeeper Human Testing
+
+Use this checklist on a disposable Paper 26.2 or 26.3 server. ScoreKeeper stores data in its plugin folder and interacts with online players, command senders, and scheduled high-score runs; a passing build alone does not verify these in-game workflows.
+
+## Test Setup
+
+- Use Java 25 or newer and a backed-up test server. Keep the server log available throughout testing.
+- Create at least two test players: one operator/admin and one ordinary player. Use a console or RCON session for console-sender cases.
+- Before each run, preserve `plugins/ScoreKeeper/scores.yml` and `archives.yml`, or use a fresh test server. Archive, reset, and bucket-wide commands intentionally change scores.
+- Record command sender, arguments, expected and observed messages, and score values before and after each operation.
+
+## Human Checklist
+
+### Startup and score commands
+
+- Start Paper and confirm ScoreKeeper enables, registers every documented command, and loads existing data without errors.
+- As a player, run `/score-get`, `/score-add`, `/score-subtract`, and `/score-reset`; check the displayed values and the configured initial value. Repeat with console/RCON, supplying a player name where required.
+- Try zero, negative, very large, missing, and non-numeric amounts. Confirm invalid input is handled clearly and does not unexpectedly alter a score.
+- Use two players to verify each player's score is independent. Change a player's Minecraft name if practical, then confirm their score remains associated with their UUID.
+- Check singular/plural unit labels at values of 1, 0, and multiple units, and confirm messages show the correct bucket and value.
+
+### Buckets and reporting
+
+- Create a test bucket with a nonzero initial value and distinctive singular/plural labels. Verify invalid IDs, blank labels, and duplicate IDs are rejected cleanly.
+- Switch one player to the bucket, add and subtract points, and confirm other players remain in their own active bucket. Switch back and verify the original score is unchanged.
+- Change the server-wide default with `/score-bucket all <bucketId>`. Confirm individual assignments are cleared, online players receive the appropriate change notice, and new players use the new default.
+- For each reporting policy (`none`, `player`, `admin`, `global`), change a score and verify exactly the intended audience receives the report. Test with an operator, a `scorekeeper.admin` player, an ordinary player, and the scored player.
+- Exercise bucket creation, switching, and administration as authorized and unauthorized senders. The README says archive, bucket administration, and run management require `scorekeeper.admin`; verify the behavior on the target server.
+- Note that the README says score get/add/subtract/reset currently have no permission checks and can target any online player. Confirm that exposure is acceptable for the server before enabling these commands publicly.
+
+### Archives
+
+- Archive one player's active-bucket score, then inspect `/score-archive-list` and `/score-archive-list <archiveId>`. Confirm the saved value and bucket are correct and the live score returns to that bucket's initial value.
+- Repeat for `/score-archive bucket <bucketId>` and `/score-archive all`. Confirm only the selected bucket or all buckets are archived and reset as requested.
+- Check archive IDs are listed newest first, then restart and confirm archives and their contents remain available.
+- Try an unknown archive ID or bucket ID and verify a useful failure without unrelated scores being changed.
+
+### High-score runs
+
+- Start a target-score run and a timed run using a test bucket and at least three players. Confirm the run starts with the requested top-N and reset setting.
+- Change scores for players inside and outside the current top-N. Verify individual score-change messages and global reporting for current top-N players match the run behavior.
+- End runs by reaching the target, expiration, and `/score-run stop`. Also start an `until-disabled` run and stop it manually.
+- Check final ranking order, ties, each online player's reported place, and the displayed top-N cutoff.
+- With reset enabled, verify scores begin at the bucket initial value and pre-run scores are restored after completion. With reset disabled, confirm scores remain as earned.
+- Restart while a run is active. Confirm the run and reset snapshot survive, timed runs expire at the intended time, and stopping or completing the run produces one final result rather than duplicate results.
+
+### Persistence and upgrades
+
+- Restart after changing scores, bucket definitions, reporting policies, the default bucket, and per-player bucket assignments. Verify all values and assignments persist.
+- Test a clean data folder and an existing/older `scores.yml` or `archives.yml` on a backed-up server. Confirm startup handles defaults, known legacy data, and malformed or unknown entries without silently corrupting valid data.
+- Check saved files after a clean shutdown and after a forced test restart; distinguish expected last-save behavior from data loss.
+
+## Automated Coverage
+
+There are currently no Java test sources or test dependencies in this project, and no integration-test source set. The Gradle `test` task therefore does not currently exercise ScoreKeeper behavior. All scenarios above should be treated as unverified until tested in-game; the “Ready” test tasks in `TODO.md` describe work that has not yet been added.

Modrinth-Description.md

@@ -0,0 +1,49 @@
+**ScoreKeeper Plugin**
+
+ScoreKeeper tracks player scores in configurable buckets. Use it for event points, competitions, or other server-side scoring systems, and integrate it with other plugins through the public API.
+
+## Commands
+
+Players can omit an optional player name to target themselves. Console and RCON must provide a player name for score get/add/subtract/reset commands.
+
+* `/score-get [playerName]` - Displays the target player's score in their active bucket.
+* `/score-add <amount>` - Adds an amount to your score in your active bucket.
+* `/score-add <playerName> <amount>` - Adds an amount to the target player's score.
+* `/score-subtract <amount>` - Subtracts an amount from your score in your active bucket.
+* `/score-subtract <playerName> <amount>` - Subtracts an amount from the target player's score.
+* `/score-reset [playerName]` - Resets the target player's active-bucket score to that bucket's initial value.
+* `/score-archive` - Archives and resets your score in your active bucket.
+* `/score-archive <playerName>` - Archives and resets the target player's score in their active bucket.
+* `/score-archive all` - Archives and resets scores in every bucket.
+* `/score-archive bucket <bucketId>` - Archives and resets every score in one bucket.
+* `/score-archive-list` - Lists saved archive IDs, newest first.
+* `/score-archive-list <archiveId>` - Displays the saved scores in one archive.
+* `/score-bucket` - Displays your active bucket.
+* `/score-bucket <bucketId>` - Switches your active bucket.
+* `/score-bucket create <id> <singular> <plural> <initialValue> [reporting]` - Creates a bucket. Reporting can be `admin`, `global`, `player`, or `none` (default).
+* `/score-bucket <playerName> <bucketId>` - Switches a player's active bucket.
+* `/score-bucket all <bucketId>` - Changes the server's default bucket and clears individual bucket assignments.
+* `/score-run start <bucketId> <topN> <reset:true|false> target <score>` - Starts a run that ends when a score reaches the target.
+* `/score-run start <bucketId> <topN> <reset:true|false> duration <time>` - Starts a timed run. Use a positive number and lowercase `s`, `m`, `h`, `d`, or `w`, such as `4h`.
+* `/score-run start <bucketId> <topN> <reset:true|false> until-disabled` - Starts a run with no automatic end.
+* `/score-run stop <bucketId>` - Ends an active run.
+
+## Permissions
+
+The `scorekeeper.admin` permission (default: operators) is required for archive commands, bucket creation/administration, and high-score run management. Score get/add/subtract/reset and archive-list commands currently have no permission checks; add, subtract, and reset can target any online player.
+
+## Features
+
+* Create score buckets with custom singular/plural labels, initial values, and reporting policies.
+* Reporting can notify operators/admins, everyone online, only the scored player, or nobody.
+* Start target-score, timed, or until-disabled high-score runs with configurable top-N standings and optional score resets.
+* Archive player, bucket, or all-bucket scores; archived scores reset to their bucket's initial value.
+* Persist bucket definitions, assignments, scores, active runs, and archives in the plugin's data folder.
+
+## API
+
+Other plugins can create buckets with `createBucket(id, singular, plural, initialValue, reporting)`, use bucket-aware score methods, and start or stop high-score runs with `startTargetScoreRun`, `startTimedScoreRun`, `startUntilDisabledScoreRun`, and `stopHighScoreRun`.
+
+## Compatibility
+
+Built exclusively for Paper 26.2 and 26.3 with the Paper API and Adventure APIs. Bukkit and Spigot servers are not supported.

Modrinth.json

@@ -0,0 +1,13 @@
+{
+  "name": "Score Keeper",
+  "url": "https://modrinth.com/plugin/scorekeeper",
+  "summary": "Track player scores in configurable buckets with custom reporting, high-score runs, and archives. Includes in-game commands and an API for other plugins.",
+  "visibility": "public",
+  "links": {
+    "issueTracker": "https://github.com/headhunter45/ScoreKeeper/issues",
+    "sourceCode": "https://github.com/headhunter45/ScoreKeeper",
+    "wikiPage": null,
+    "discordInvite": null,
+    "donationLinks": []
+  }
+}

Project-Description.json

@@ -1,7 +1,7 @@
 {
   "id": "scorekeeper",
   "title": "ScoreKeeper",
-  "description": "Paper Minecraft plugin for tracking and managing player scores.",
+  "description": "A reusable Paper 26.2/26.3 scoring engine with named buckets, custom reporting, persistent archives, high-score runs, player commands, and a public API for companion plugins.",
   "docId": "ScoreKeeper",
   "image": {
     "url": "https://image.pollinations.ai/prompt/pixel%20art%20Minecraft%20server%20scoreboard%20with%20a%20glowing%20diamond%20and%20number%20counters%2C%20clean%20square%20game%20plugin%20thumbnail%2C%20no%20text",

Project-Description.md

@@ -0,0 +1,12 @@
+# ScoreKeeper
+
+ScoreKeeper is a reusable scoring engine for Paper 26.2 and 26.3. It gives events, competitions, and companion plugins a shared language for points: named buckets can have custom singular/plural labels, initial values, reporting policies, archives, and high-score runs.
+
+The plugin is both a player-facing command system and an extension point. Administrators can start target-based, timed, or manually stopped score runs, while other plugins can create buckets, award points, archive results, and build richer game loops through the public API. Scores, assignments, runs, and archives persist across server restarts. Bukkit and Spigot servers are not supported.
+
+## Engineering Notes
+
+- Built with Gradle and Java 25 for modern Paper.
+- Uses UUID-based player identity and YAML-backed persistence.
+- Includes server-free JUnit coverage for domain rules, commands, reporting, archives, and lifecycle behavior.
+- Designed as the scoring foundation used by companion plugins such as MobScores.

Project.md

@@ -7,7 +7,7 @@
 
 ## 1. What is ScoreKeeper?
 
-ScoreKeeper is a **Paper Minecraft plugin** (Java 21, Bukkit/Adventure APIs) that manages player
+ScoreKeeper is a **Paper Minecraft plugin** (Java 25, Paper/Adventure APIs) that manages player
 score tracking. It exposes five in-game/console commands (`/score-get`, `/score-add`,
 `/score-subtract`, `/score-reset`, `/score-archive`) for manual score manipulation — no events,
 no timers, no automation.
@@ -24,12 +24,12 @@ and scoring formulas are all **future scope**. See §4 for the gap between *what
 | Item | Value |
 |------|-------|
 | Language | Java 21 (Gradle auto-downloads toolchain) |
-| Runtime target | Paper 1.21.7 (Bukkit + Adventure APIs) |
+| Runtime target | Paper 26.2 and 26.3 |
 | Build tool | Gradle 8.14.3 (`gradlew`) |
 | Linting | Spotless (`googleJavaFormat()` + license header from `config/license-header.txt`) |
-| Release | `net.researchgate.release` plugin; tags `v$version`; rejects snapshot deps except paper-api |
+| Versioning | `org.danilopianini.git-sensitive-semantic-versioning`; minimum version `0.2.1`; reads `vX.Y.Z` tags |
-| External deps | **None at runtime.** `paper-api:1.21.7-R0.1-SNAPSHOT` is `compileOnly` only. |
+| External deps | **None at runtime.** The Paper API is `compileOnly` only. |
-| CI/release entry point | `./gradlew spotlessCheck build` then `./gradlew release` |
+| CI/release entry point | Run `./gradlew spotlessCheck build`, tag the release commit (for example, `git tag -a v0.2.2 -m "Release v0.2.2"`), then rebuild to produce the stable release artifact |
 
 ### Build quickly
 
@@ -104,7 +104,7 @@ ADMIN / CONSOLE / RCON ──▶ types a /score-* command
 
 ### File: ScoreKeeperPlugin.java (`ScoreKeeperPlugin`)
 
-- `main` class in `plugin.yml` (Bukkit plugin entry point)
+- `main` class in `plugin.yml` (Paper plugin entry point)
 - `HashMap<UUID, Integer> _playerScores` at line 38 — the sole score store
 - `onEnable()` (line 52): wires five command executors, logs \"load not implemented\" warning
 - `onDisable()` (line 46): logs \"save not implemented\" warning — scores lost on shutdown
@@ -227,7 +227,7 @@ asynchronously could corrupt state via non-atomic read-modify-write.
 
 ### Run locally (Paper server)
 
-1. Download Paper 1.21.7 from `https://papermc.io`
+1. Download Paper 26.2 or 26.3 from `https://papermc.io`
 2. Copy the built jar into `plugins/`
 3. Start the server, verify onEnable logs:
    ```

ProjectDescription.md

@@ -1,16 +0,0 @@
-# ScoreKeeper
-
-ScoreKeeper is a Paper Minecraft plugin for tracking player scores during server activities, events, or games. It keeps scores per player in memory and exposes commands for viewing, changing, resetting, and archiving scores.
-
-## Details
-
-- Built for Paper API 1.21.7 with Java 21 and Gradle.
-- Registers `/score-get`, `/score-add`, `/score-subtract`, `/score-reset`, and `/score-archive`.
-- Commands use the executing player when a player name is omitted.
-- Scores are currently held in memory and are not persisted when the server stops.
-- Score archiving is planned, but the current implementation reports that archiving is unavailable.
-- The project is packaged as a Java plugin with a `plugin.yml` descriptor.
-
-## Image
-
-No project image asset is included in the repository. The JSON description includes a prompt-backed image URL for a future project thumbnail.

README.md

@@ -1,23 +1,48 @@
 # ScoreKeeper Plugin
 
+[![Java CI with Gradle](https://github.com/headhunter45/ScoreKeeper/actions/workflows/gradle.yml/badge.svg)](https://github.com/headhunter45/ScoreKeeper/actions/workflows/gradle.yml)
+
+ScoreKeeper supports Paper 26.2 and 26.3 only. Bukkit and Spigot servers are not supported.
+
 ## Running
 
 ### Commands
 
-* `/score-get [playerName]` - Displays the player's score.
+For commands with an optional player name, players can omit it to target themselves. Console and RCON must provide a player name for score get/add/subtract/reset commands.
-* `/score-add [playerName] <amount>` - Add amount points to the player's score.
-* `/score-subtract [playerName] <amount>` - Subtracts amount points from the player's score.
-* `/score-reset [playerName]` - Resets the player's score to 0.
-* `/score-archive [playerName]` - Saves the player's score to a "High Scores" table and resets their current score to 0.
 
-NOTES:
+* `/score-get [playerName]` - Displays the target player's score in their active bucket.
-* All commands will use the executing player in place of [playerName] if it is omitted.
+* `/score-add <amount>` - Adds an amount to your score in your active bucket.
-* Permissions support is coming AFTER I get archive to work.
+* `/score-add <playerName> <amount>` - Adds an amount to the target player's score.
-* The commands aside from get are intended for admins and whatnot as some other plugin should be using the methods instead of letting player's execute commands.
+* `/score-subtract <amount>` - Subtracts an amount from your score in your active bucket.
+* `/score-subtract <playerName> <amount>` - Subtracts an amount from the target player's score.
+* `/score-reset [playerName]` - Resets the target player's score in their active bucket to that bucket's initial value.
+* `/score-archive` - Archives and resets your score in your active bucket.
+* `/score-archive <playerName>` - Archives and resets the target player's score in their active bucket.
+* `/score-archive all` - Archives and resets scores in every bucket.
+* `/score-archive bucket <bucketId>` - Archives and resets every score in one bucket.
+* `/score-archive-list` - Lists saved archive IDs, newest first.
+* `/score-archive-list <archiveId>` - Displays the saved scores in one archive.
+* `/score-bucket` - Displays your active bucket.
+* `/score-bucket <bucketId>` - Switches your active bucket.
+* `/score-bucket create <id> <singular> <plural> <initialValue> [reporting]` - Creates a bucket. Reporting is `admin`, `global`, `player`, or `none` and defaults to `none`.
+* `/score-bucket <playerName> <bucketId>` - Switches a player's active bucket.
+* `/score-bucket all <bucketId>` - Changes the server's default bucket and clears individual bucket assignments.
+* `/score-run start <bucketId> <topN> <reset:true|false> target <score>` - Starts a run that ends when a score reaches the target.
+* `/score-run start <bucketId> <topN> <reset:true|false> duration <time>` - Starts a timed run. Use a positive number followed by lowercase `s`, `m`, `h`, `d`, or `w` (for example, `4h`).
+* `/score-run start <bucketId> <topN> <reset:true|false> until-disabled` - Starts a run with no automatic end.
+* `/score-run stop <bucketId>` - Ends an active run.
+
+The `scorekeeper.admin` permission (default: operators) is required for archive commands, bucket creation/administration, and high-score run management. Score get/add/subtract/reset and archive-list commands currently have no permission checks; add, subtract, and reset can target any online player.
+
+When a player's active bucket changes, they are told the bucket name and their current score with its singular or plural unit.
+
+Bucket reporting defaults to `none`; `admin` notifies operators and score admins, `global` notifies all online players, and `player` notifies only the scored player. Other plugins can create buckets with `createBucket(id, singular, plural, initialValue, reporting)` and use the bucket-aware score methods. Existing score methods operate on the player's active bucket. Bucket definitions, reporting policies, assignments, and scores are saved in `plugins/ScoreKeeper/scores.yml`; archives are saved separately in `plugins/ScoreKeeper/archives.yml`.
+
+Other plugins can start runs with `startTargetScoreRun`, `startTimedScoreRun`, or `startUntilDisabledScoreRun`, and end one with `stopHighScoreRun`. During a run, players receive their own score changes, while changes by current top-`n` players are reported globally. Finished runs publish a deterministic score-ordered table and each online player's place; reset runs restore the pre-run bucket scores.
 
 ## Development
 
 See [CONTRIBUTING.md](CONTRIBUTING.md) for development environment setup instructions.
 
 Tooling note:
-* Gradle is configured with Java Toolchains and will automatically download a Java 21 JDK when needed during builds.
+* Gradle is configured with Java Toolchains and will automatically download an appropriate JDK when needed during builds.

TODO.md

@@ -1,17 +1,17 @@
-# Migration TODOs for Paper Modernization
+## Tasks
 
-- [x] Switch all player score storage to use UUID instead of Player as the key
+|  ID   |  Status  | Title |
-- [x] Update logger usage to use getLogger() from JavaPlugin
+|:-----:|:--------:|:------|
-- [x] Remove or modernize any old/deprecated event registration (use @EventHandler and registerEvents)
+| SK-01 |  Done    | Save scores between server launches. |
-- [x] Review and update player lookup logic to use getPlayerExact or handle case sensitivity
+| SK-02 |  Done    | Allow tracking scores by bucket. An admin or other plugin should be able to create types of scores with named other than points. { id: "Bread", singular: "loaf", plural: "loaves", initialValue: 0 } Each player's score will be tracked in a bucket by id. Players may be all switched to a bucket or individually switched. |\
-- [x] Ensure all commands are properly defined in plugin.yml
+| SK-03 |  Done    | Add optional score reporting to buckets with these four values. { id: "Bread", singular: "loaf", plural: "loaves", initialValue: 0, reporting:"admin|global|player|none" } admin means ops/admin only, global means everyone on the server, player means only tell the player, and none means don't report changes.
-- [x] Initialize Gradle build system
+| SK-04 |  Done    | Tell a player when their bucket changes. Something like "You are now tracking ${id}. You have ${score} ${plural or singular depending in score}." |
-- [x] Set project metadata in build.gradle
+| SK-05 |  Done    | Enable high score runs for a bucket. Admins or pugins should be able to start a run on a certain kind of score. The top n (configurable) players will have their scores reported globally for this bucket and the individual player will have their score reported to them when it changes. Scores will be optionally reset to their initialValue with the old score for this bucket saved. High score runs will have a lifetime of a target high score, a time like 4 hours or 1 week, or until-disabled. When the high score run is finished all players will be messaged a table with the top n places and their scores along with the individual user's place and score. The scores will be reset to their previous values if they were reset to their initialValue at the beginning otherwise they will be left alone. |
-- [x] Add repositories and dependencies
+| SK-06 |  Done    | Score archiving. Scores either all or within a given bucket should be able to be archived and reset to their initial value. The archived scores should be able to be listed via a command. |
-- [x] Configure Java version
+| SK-07 |  Done    | Replace 'net.researchgate.release' with org.danilopianini.git-sensitive-semantic-versioning' for our versioning in our build.gradle file. Turn org.gradle.configuration-cache back on after this. Our current version is 0.2.1-SNAPSHOT. Use that as our default or 0.2.1 and tag the commit to update to 0.2.2. |
-- [x] Ensure resource handling for plugin.yml
+| SK-08 |  Ready   | Add JUnit 5 test infrastructure and keep the default Gradle `test` task server-free. Use an in-memory Paper test harness such as MockBukkit for plugin lifecycle and Bukkit/Paper behavior; use Mockito only for narrow API boundaries where a harness is unnecessary. |
-- [x] Add Gradle plugins as needed (e.g., Shadow)
+| SK-09 |  Ready   | Add fast unit tests for score and bucket rules: bucket validation and duplicate IDs, initial values, UUID-isolated scores, default and per-player bucket selection, and add/subtract/reset behavior. Keep domain rules independent of a running Minecraft server. |
-- [x] Update .gitignore for Gradle
+| SK-10 |  Ready   | Test YAML persistence and archives using temporary plugin data directories: score/bucket/assignment round trips, active-run state, archive contents and resets, legacy score loading, and malformed or unknown stored entries. |
-- [x] Remove Maven files
+| SK-11 |  Ready   | Test command validation and dispatch, reporting policies and messages, bucket-switch messages, and high-score run ranking/lifecycle (top-N ordering, ties, target/duration/manual finish, and score restoration). Use a controllable clock and in-memory scheduler where needed. |
-- [x] Update documentation and scripts
+| SK-12 |  Ready   | Add a separate Gradle `integrationTest` source set/task only for behavior that needs a real Paper server, such as loading the built plugin jar, verifying actual command registration/dispatch, and persistence across a server restart. Run it only when explicitly requested; keep it out of the normal `test` and `build` tasks. |
-- [x] Test the Gradle build
+| SK-13 |  Ready   | Add a an option to `/score-get` to get the score for a specific bucket. |

build.gradle

@@ -1,13 +1,18 @@
 plugins {
-    id 'com.diffplug.spotless' version '6.22.0'
+    id 'com.diffplug.spotless' version '8.10.3'
     id 'java-library'
     id 'maven-publish'
-    id 'net.researchgate.release' version '3.1.0'
+    id 'org.danilopianini.git-sensitive-semantic-versioning' version '7.0.24'
 }
 
 group = 'com.majinnaibu.minecraft.plugins'
 description = "ScoreKeeper"
 
+gitSemVer {
+    minimumVersion.set('0.2.1')
+    versionPrefix.set('v')
+}
+
 tasks.withType(JavaCompile).configureEach {
 	options.encoding = 'UTF-8'
     // options.compilerArgs << "-Xlint:deprecation"
@@ -18,19 +23,35 @@ tasks.withType(Javadoc).configureEach {
 }
 
 dependencies {
-    compileOnly 'io.papermc.paper:paper-api:1.21.7-R0.1-SNAPSHOT'
+    compileOnly 'io.papermc.paper:paper-api:26.2.build.129-stable'
 }
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        // Paper 26.1+ requires Java 25.
+        languageVersion = JavaLanguageVersion.of(25)
     }
 }
 
+tasks.named('wrapper') {
+    gradleVersion = '9.8.0'
+    distributionType = Wrapper.DistributionType.BIN
+    distributionBase = Wrapper.PathBase.PROJECT
+    distributionPath = '.gradle/wrapper/dists'
+    archiveBase = Wrapper.PathBase.PROJECT
+    archivePath = '.gradle/wrapper/dists'
+}
+
+tasks.named('updateDaemonJvm') {
+    languageVersion = JavaLanguageVersion.of(25)
+}
+
+def pluginVersion = project.version.toString()
+
 processResources {
-    inputs.property "version", project.version
+    inputs.property "version", pluginVersion
     filesMatching('plugin.yml') {
-        expand(project.properties)
+        expand(version: pluginVersion)
     }
 }
 
@@ -42,18 +63,6 @@ publishing {
     }
 }
 
-release {
-//    buildTasks.addAll(['spotlessCheck', 'build'])
-    buildTasks = ['spotlessCheck', 'build']
-    failOnSnapshotDependencies = true
-    ignoredSnapshotDependencies = [
-        "io.papermc.paper:paper-api"
-    ]
-    revertOnFail = true
-    tagTemplate = 'v$version'
-    versionPropertyFile = 'gradle.properties'
-}
-
 repositories {        
      mavenCentral()
      maven { url = 'https://repo.papermc.io/repository/maven-public/' }
@@ -61,7 +70,7 @@ repositories {
 
 spotless {
     java {
-        googleJavaFormat()
+        googleJavaFormat('1.36.1')
         importOrder 'java', 'javax', 'com', 'net', 'org', ''
         licenseHeaderFile 'config/license-header.txt'
         target 'src/**/*.java'

gradle.properties

@@ -1,3 +1,5 @@
-version=0.2.2-SNAPSHOT
+org.gradle.configuration-cache=true
+org.gradle.daemon=true
 org.gradle.java.installations.auto-download=true
-
+org.gradle.java.installations.auto-detect=false
+org.gradle.java.installations.fromEnv=JAVA_HOME

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,8 @@
-distributionBase=GRADLE_USER_HOME
+distributionBase=PROJECT
-distributionPath=wrapper/dists
+distributionPath=.gradle/wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+distributionSha256Sum=bafd5ce9cfaea0fbccfdc8439a1ac42fbd4cd9c89dc9a988228d8a2639a58e6c
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.8.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
-zipStoreBase=GRADLE_USER_HOME
+zipStoreBase=PROJECT
-zipStorePath=wrapper/dists
+zipStorePath=.gradle/wrapper/dists

settings.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'org.gradle.toolchains.foojay-resolver-convention' version '0.9.0'
+	id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
 }
 
 rootProject.name = 'ScoreKeeper'

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/ScoreBucket.java

@@ -0,0 +1,71 @@
+/*
+This file is part of Score Keeper.
+
+Score Keeper is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Score Keeper is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with Score Keeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
+*/
+
+package com.majinnaibu.minecraft.plugins.scorekeeper;
+
+public final class ScoreBucket {
+  private final String _id;
+  private final String _singular;
+  private final String _plural;
+  private final int _initialValue;
+  private final ScoreReporting _reporting;
+
+  public ScoreBucket(String id, String singular, String plural, int initialValue) {
+    this(id, singular, plural, initialValue, ScoreReporting.NONE);
+  }
+
+  public ScoreBucket(
+      String id, String singular, String plural, int initialValue, ScoreReporting reporting) {
+    if (id == null || !id.matches("[A-Za-z0-9_-]+")) {
+      throw new IllegalArgumentException("Bucket ID must contain only letters, numbers, _ or -");
+    }
+    if (singular == null || singular.isBlank()) {
+      throw new IllegalArgumentException("Bucket singular label cannot be blank");
+    }
+    if (plural == null || plural.isBlank()) {
+      throw new IllegalArgumentException("Bucket plural label cannot be blank");
+    }
+    if (reporting == null) {
+      throw new IllegalArgumentException("Bucket reporting policy cannot be null");
+    }
+    _id = id;
+    _singular = singular;
+    _plural = plural;
+    _initialValue = initialValue;
+    _reporting = reporting;
+  }
+
+  public String getId() {
+    return _id;
+  }
+
+  public String getSingular() {
+    return _singular;
+  }
+
+  public String getPlural() {
+    return _plural;
+  }
+
+  public int getInitialValue() {
+    return _initialValue;
+  }
+
+  public ScoreReporting getReporting() {
+    return _reporting;
+  }
+}

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/ScoreKeeperPlugin.java

@@ -17,25 +17,45 @@ along with ScoreKeeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
 
 package com.majinnaibu.minecraft.plugins.scorekeeper;
 
-import java.util.HashMap;
+import java.io.File;
+import java.io.IOException;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
 import java.util.UUID;
 import java.util.logging.Level;
 
 import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreAddCommand;
 import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreArchiveCommand;
+import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreArchiveListCommand;
+import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreBucketCommand;
 import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreGetCommand;
 import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreResetCommand;
+import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreRunCommand;
 import com.majinnaibu.minecraft.plugins.scorekeeper.commands.ScoreSubtractCommand;
 
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 
 import org.bukkit.command.CommandSender;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
 
 public class ScoreKeeperPlugin extends JavaPlugin {
-  private final HashMap<UUID, Integer> _playerScores = new HashMap<UUID, Integer>();
+  private final Map<String, ScoreBucket> _buckets = new LinkedHashMap<>();
+  private final Map<String, Map<UUID, Integer>> _bucketScores = new LinkedHashMap<>();
+  private final Map<UUID, String> _playerBuckets = new LinkedHashMap<>();
+  private final Map<String, HighScoreRun> _highScoreRuns = new LinkedHashMap<>();
+  private final Map<String, ScoreArchive> _scoreArchives = new LinkedHashMap<>();
+  private String _defaultBucketId = "points";
   public final String _logPrefix = "[ScoreKeeper] ";
   public final Component _messagePrefix =
       Component.text("[")
@@ -44,20 +64,60 @@ public class ScoreKeeperPlugin extends JavaPlugin {
 
   @Override
   public void onDisable() {
-    // TODO: save score data to file
+    YamlConfiguration scores = new YamlConfiguration();
-    logWarning("Unable to save scores to file. This feature is not implemented yet.");
+    scores.set("version", 3);
+    scores.set("default-bucket", _defaultBucketId);
+    for (ScoreBucket bucket : _buckets.values()) {
+      String path = "buckets." + bucket.getId();
+      scores.set(path + ".singular", bucket.getSingular());
+      scores.set(path + ".plural", bucket.getPlural());
+      scores.set(path + ".initial-value", bucket.getInitialValue());
+      scores.set(path + ".reporting", bucket.getReporting().name().toLowerCase());
+      for (var entry : _bucketScores.get(bucket.getId()).entrySet()) {
+        scores.set(path + ".scores." + entry.getKey(), entry.getValue());
+      }
+    }
+    for (var entry : _playerBuckets.entrySet()) {
+      scores.set("player-buckets." + entry.getKey(), entry.getValue());
+    }
+    for (HighScoreRun run : _highScoreRuns.values()) {
+      String path = "high-score-runs." + run.bucketId;
+      scores.set(path + ".top-n", run.topN);
+      scores.set(path + ".reset-scores", run.resetScores);
+      scores.set(path + ".lifetime", run.lifetime.name().toLowerCase(Locale.ROOT));
+      scores.set(path + ".target-score", run.targetScore);
+      scores.set(path + ".expires-at", run.expiresAtMillis);
+      for (var entry : run.previousScores.entrySet()) {
+        scores.set(path + ".previous-scores." + entry.getKey(), entry.getValue());
+      }
+    }
+    try {
+      scores.save(new File(getDataFolder(), "scores.yml"));
+    } catch (IOException ex) {
+      logError(ex);
+    }
+    saveArchives();
   }
 
   @Override
   public void onEnable() {
-    getCommand("score-get").setExecutor(new ScoreGetCommand(this));
+    Objects.requireNonNull(getCommand("score-get")).setExecutor(new ScoreGetCommand(this));
-    getCommand("score-add").setExecutor(new ScoreAddCommand(this));
+    Objects.requireNonNull(getCommand("score-add")).setExecutor(new ScoreAddCommand(this));
-    getCommand("score-subtract").setExecutor(new ScoreSubtractCommand(this));
+    Objects.requireNonNull(getCommand("score-subtract"))
-    getCommand("score-reset").setExecutor(new ScoreResetCommand(this));
+        .setExecutor(new ScoreSubtractCommand(this));
-    getCommand("score-archive").setExecutor(new ScoreArchiveCommand(this));
+    Objects.requireNonNull(getCommand("score-reset")).setExecutor(new ScoreResetCommand(this));
+    Objects.requireNonNull(getCommand("score-archive")).setExecutor(new ScoreArchiveCommand(this));
+    Objects.requireNonNull(getCommand("score-archive-list"))
+        .setExecutor(new ScoreArchiveListCommand(this));
+    Objects.requireNonNull(getCommand("score-bucket")).setExecutor(new ScoreBucketCommand(this));
+    Objects.requireNonNull(getCommand("score-run")).setExecutor(new ScoreRunCommand(this));
 
-    // TODO: load score data from file
+    _buckets.put("points", new ScoreBucket("points", "point", "points", 0));
-    logWarning("Unable to load scores from file. This feature is not " + "implemented yet.");
+    _bucketScores.put("points", new LinkedHashMap<>());
+    loadScores();
+    loadArchives();
+    checkHighScoreRuns();
+    getServer().getScheduler().runTaskTimer(this, this::checkHighScoreRuns, 20L, 20L);
 
     logInfo(
         getPluginMeta().getName() + " version " + getPluginMeta().getVersion() + " is enabled.");
@@ -65,48 +125,673 @@ public class ScoreKeeperPlugin extends JavaPlugin {
 
   // region Commands
   public void addScore(Player player, int amount) {
-    int oldScore = getPlayerScore(player);
+    addScore(player, getPlayerBucket(player), amount);
-    setPlayerScore(player, oldScore + amount);
+  }
+
+  public void addScore(Player player, String bucketId, int amount) {
+    setScore(player, bucketId, getScore(player, bucketId) + amount);
   }
 
   public void archiveScore(Player player) {
-    logWarning("Unable to archive score for " + player.getName() + ".");
+    archivePlayerScore(player);
+  }
+
+  public String archivePlayerScore(Player player) {
+    String bucketId = getPlayerBucket(player);
+    return createScoreArchive(
+        "player " + player.getName() + " in " + bucketId, List.of(bucketId), player);
+  }
+
+  public String archiveBucketScores(String bucketId) {
+    requireBucket(bucketId);
+    return createScoreArchive("bucket " + bucketId, List.of(bucketId), null);
+  }
+
+  public String archiveAllScores() {
+    return createScoreArchive("all buckets", new ArrayList<>(_buckets.keySet()), null);
+  }
+
+  public List<ScoreArchive> getScoreArchives() {
+    return List.copyOf(_scoreArchives.values());
+  }
+
+  public ScoreArchive getScoreArchive(String archiveId) {
+    return _scoreArchives.get(archiveId);
   }
 
   public int getScore(Player player) {
-    return getPlayerScore(player);
+    return getScore(player, getPlayerBucket(player));
+  }
+
+  public int getScore(Player player, String bucketId) {
+    ScoreBucket bucket = requireBucket(bucketId);
+    return _bucketScores
+        .get(bucketId)
+        .computeIfAbsent(player.getUniqueId(), uuid -> bucket.getInitialValue());
   }
 
   public void resetScore(Player player) {
-    setPlayerScore(player, 0);
+    resetScore(player, getPlayerBucket(player));
+  }
+
+  public void resetScore(Player player, String bucketId) {
+    setScore(player, bucketId, requireBucket(bucketId).getInitialValue());
   }
 
   public void setScore(Player player, int score) {
-    setPlayerScore(player, score);
+    setScore(player, getPlayerBucket(player), score);
+  }
+
+  public void setScore(Player player, String bucketId, int score) {
+    ScoreBucket bucket = requireBucket(bucketId);
+    int oldScore = getScore(player, bucketId);
+    _bucketScores.get(bucketId).put(player.getUniqueId(), score);
+    if (oldScore != score) {
+      HighScoreRun run = _highScoreRuns.get(bucketId);
+      if (run == null) {
+        reportScoreChange(player, bucket, score);
+      } else {
+        reportHighScoreRunChange(player, bucket, run, score);
+        if (run.lifetime == HighScoreLifetime.TARGET_SCORE && score >= run.targetScore) {
+          finishHighScoreRun(bucketId);
+        }
+      }
+    }
   }
 
   public void subtractScore(Player player, int amount) {
-    int oldScore = getPlayerScore(player);
+    subtractScore(player, getPlayerBucket(player), amount);
-    setPlayerScore(player, oldScore - amount);
+  }
+
+  public void subtractScore(Player player, String bucketId, int amount) {
+    setScore(player, bucketId, getScore(player, bucketId) - amount);
+  }
+
+  public ScoreBucket createBucket(String id, String singular, String plural, int initialValue) {
+    return createBucket(id, singular, plural, initialValue, ScoreReporting.NONE);
+  }
+
+  public ScoreBucket createBucket(
+      String id, String singular, String plural, int initialValue, ScoreReporting reporting) {
+    ScoreBucket bucket = new ScoreBucket(id, singular, plural, initialValue, reporting);
+    if (_buckets.containsKey(id)) {
+      throw new IllegalArgumentException("A score bucket with ID " + id + " already exists");
+    }
+    _buckets.put(id, bucket);
+    _bucketScores.put(id, new LinkedHashMap<>());
+    return bucket;
+  }
+
+  public ScoreBucket getBucket(String bucketId) {
+    return _buckets.get(bucketId);
+  }
+
+  public Map<String, ScoreBucket> getBuckets() {
+    return Map.copyOf(_buckets);
+  }
+
+  public String getPlayerBucket(Player player) {
+    return _playerBuckets.getOrDefault(player.getUniqueId(), _defaultBucketId);
+  }
+
+  public void switchPlayerBucket(Player player, String bucketId) {
+    ScoreBucket bucket = requireBucket(bucketId);
+    UUID playerId = player.getUniqueId();
+    String previousBucketId = getPlayerBucket(player);
+    if (bucketId.equals(_defaultBucketId)) {
+      _playerBuckets.remove(playerId);
+    } else {
+      _playerBuckets.put(playerId, bucketId);
+    }
+    if (!previousBucketId.equals(bucketId)) {
+      sendBucketChangeMessage(player, bucket);
+    }
+  }
+
+  public void switchAllPlayers(String bucketId) {
+    requireBucket(bucketId);
+    Map<UUID, String> previousBuckets = new LinkedHashMap<>();
+    for (Player player : getServer().getOnlinePlayers()) {
+      previousBuckets.put(Objects.requireNonNull(player).getUniqueId(), getPlayerBucket(player));
+    }
+    _defaultBucketId = bucketId;
+    _playerBuckets.clear();
+    ScoreBucket bucket = requireBucket(bucketId);
+    for (Player player : getServer().getOnlinePlayers()) {
+      if (!bucketId.equals(previousBuckets.get(Objects.requireNonNull(player).getUniqueId()))) {
+        sendBucketChangeMessage(player, bucket);
+      }
+    }
+  }
+
+  public void startTargetScoreRun(String bucketId, int topN, boolean resetScores, int targetScore) {
+    ScoreBucket bucket = requireBucket(bucketId);
+    if (resetScores && targetScore <= bucket.getInitialValue()) {
+      throw new IllegalArgumentException("Target score must exceed the bucket's initial value");
+    }
+    startHighScoreRun(bucketId, topN, resetScores, HighScoreLifetime.TARGET_SCORE, targetScore, 0L);
+  }
+
+  public void startTimedScoreRun(
+      String bucketId, int topN, boolean resetScores, Duration duration) {
+    if (duration == null || duration.isNegative() || duration.isZero()) {
+      throw new IllegalArgumentException("Run duration must be positive");
+    }
+    long durationMillis;
+    long expiresAtMillis;
+    try {
+      durationMillis = duration.toMillis();
+      expiresAtMillis = Math.addExact(System.currentTimeMillis(), durationMillis);
+    } catch (ArithmeticException ex) {
+      throw new IllegalArgumentException("Run duration is too large", ex);
+    }
+    if (durationMillis <= 0) {
+      throw new IllegalArgumentException("Run duration must be at least one millisecond");
+    }
+    startHighScoreRun(bucketId, topN, resetScores, HighScoreLifetime.DURATION, 0, expiresAtMillis);
+  }
+
+  public void startUntilDisabledScoreRun(String bucketId, int topN, boolean resetScores) {
+    startHighScoreRun(bucketId, topN, resetScores, HighScoreLifetime.UNTIL_DISABLED, 0, 0L);
+  }
+
+  public void stopHighScoreRun(String bucketId) {
+    if (!_highScoreRuns.containsKey(bucketId)) {
+      throw new IllegalArgumentException("No high-score run is active for bucket " + bucketId);
+    }
+    finishHighScoreRun(bucketId);
+  }
+
+  public boolean hasActiveHighScoreRun(String bucketId) {
+    return _highScoreRuns.containsKey(bucketId);
   }
 
   // endregion
 
   // region Utiilty Methods
   public void sendMessage(CommandSender reciever, Component message) {
-    reciever.sendMessage(_messagePrefix.append(message));
+    reciever.sendMessage(_messagePrefix.append(Objects.requireNonNull(message)));
   }
 
-  private int getPlayerScore(Player player) {
+  private ScoreBucket requireBucket(String bucketId) {
-    UUID uuid = player.getUniqueId();
+    ScoreBucket bucket = _buckets.get(bucketId);
-    if (!_playerScores.containsKey(uuid)) {
+    if (bucket == null) {
-      _playerScores.put(uuid, 0);
+      throw new IllegalArgumentException("Unknown score bucket: " + bucketId);
     }
-    return _playerScores.get(uuid);
+    return bucket;
   }
 
-  private void setPlayerScore(Player player, int score) {
+  private void sendBucketChangeMessage(Player player, ScoreBucket bucket) {
-    _playerScores.put(player.getUniqueId(), score);
+    int score = getScore(player, bucket.getId());
+    String unit = score == 1 ? bucket.getSingular() : bucket.getPlural();
+    sendMessage(
+        player,
+        Component.text(
+            "You are now tracking " + bucket.getId() + ". You have " + score + " " + unit + "."));
+  }
+
+  private String createScoreArchive(String scope, List<String> bucketIds, Player player) {
+    for (String bucketId : bucketIds) {
+      if (_highScoreRuns.containsKey(bucketId)) {
+        throw new IllegalArgumentException(
+            "Stop the active high-score run for " + bucketId + " before archiving it");
+      }
+    }
+
+    Map<String, Map<UUID, Integer>> archivedScores = new LinkedHashMap<>();
+    UUID playerId = player == null ? null : player.getUniqueId();
+    for (String bucketId : bucketIds) {
+      ScoreBucket bucket = requireBucket(bucketId);
+      Map<UUID, Integer> bucketScores = _bucketScores.get(bucketId);
+      if (playerId == null) {
+        archivedScores.put(bucketId, new LinkedHashMap<>(bucketScores));
+        bucketScores.replaceAll((uuid, score) -> bucket.getInitialValue());
+      } else {
+        int score = getScore(player, bucketId);
+        archivedScores.put(bucketId, Map.of(playerId, score));
+        bucketScores.put(playerId, bucket.getInitialValue());
+      }
+    }
+
+    String archiveId = UUID.randomUUID().toString();
+    _scoreArchives.put(
+        archiveId, new ScoreArchive(archiveId, scope, System.currentTimeMillis(), archivedScores));
+    return archiveId;
+  }
+
+  private void startHighScoreRun(
+      String bucketId,
+      int topN,
+      boolean resetScores,
+      HighScoreLifetime lifetime,
+      int targetScore,
+      long expiresAtMillis) {
+    ScoreBucket bucket = requireBucket(bucketId);
+    if (topN < 1) {
+      throw new IllegalArgumentException("Top N must be at least 1");
+    }
+    if (_highScoreRuns.containsKey(bucketId)) {
+      throw new IllegalArgumentException("A high-score run is already active for " + bucketId);
+    }
+
+    Map<UUID, Integer> bucketScores = _bucketScores.get(bucketId);
+    Map<UUID, Integer> previousScores = resetScores ? new LinkedHashMap<>(bucketScores) : Map.of();
+    if (resetScores) {
+      bucketScores.replaceAll((playerId, score) -> bucket.getInitialValue());
+    }
+    _highScoreRuns.put(
+        bucketId,
+        new HighScoreRun(
+            bucketId, topN, resetScores, lifetime, targetScore, expiresAtMillis, previousScores));
+    checkHighScoreRuns();
+  }
+
+  private void checkHighScoreRuns() {
+    long now = System.currentTimeMillis();
+    List<String> finishedRuns = new ArrayList<>();
+    for (HighScoreRun run : _highScoreRuns.values()) {
+      boolean expired = run.lifetime == HighScoreLifetime.DURATION && now >= run.expiresAtMillis;
+      boolean targetReached =
+          run.lifetime == HighScoreLifetime.TARGET_SCORE
+              && _bucketScores.get(run.bucketId).values().stream()
+                  .anyMatch(score -> score >= run.targetScore);
+      if (expired || targetReached) {
+        finishedRuns.add(run.bucketId);
+      }
+    }
+    for (String bucketId : finishedRuns) {
+      finishHighScoreRun(bucketId);
+    }
+  }
+
+  private void reportHighScoreRunChange(
+      Player player, ScoreBucket bucket, HighScoreRun run, int score) {
+    String message = scoreMessage(player.getName(), bucket, score);
+    sendMessage(player, Component.text(Objects.requireNonNull(message)));
+    List<ScoreEntry> standings = getRankedScores(bucket.getId());
+    for (int place = 0; place < Math.min(run.topN, standings.size()); place++) {
+      if (standings.get(place).playerId.equals(player.getUniqueId())) {
+        for (Player recipient : getServer().getOnlinePlayers()) {
+          if (recipient != player) {
+            sendMessage(recipient, Component.text(Objects.requireNonNull(message)));
+          }
+        }
+        return;
+      }
+    }
+  }
+
+  private void finishHighScoreRun(String bucketId) {
+    HighScoreRun run = _highScoreRuns.remove(bucketId);
+    if (run == null) {
+      return;
+    }
+
+    ScoreBucket bucket = requireBucket(bucketId);
+    List<ScoreEntry> standings = getRankedScores(bucketId);
+    StringBuilder table =
+        new StringBuilder("High-score run for ").append(bucketId).append(" finished.");
+    int places = Math.min(run.topN, standings.size());
+    if (places == 0) {
+      table.append("\nNo scores were recorded.");
+    }
+    for (int place = 0; place < places; place++) {
+      ScoreEntry entry = standings.get(place);
+      table
+          .append("\n")
+          .append(place + 1)
+          .append(". ")
+          .append(entry.playerName)
+          .append(" - ")
+          .append(entry.score)
+          .append(" ")
+          .append(scoreUnit(bucket, entry.score));
+    }
+
+    if (run.resetScores) {
+      Map<UUID, Integer> bucketScores = _bucketScores.get(bucketId);
+      bucketScores.clear();
+      bucketScores.putAll(run.previousScores);
+    }
+    logInfo(table.toString().replace('\n', ' '));
+    for (Player player : getServer().getOnlinePlayers()) {
+      ScoreEntry personalEntry = null;
+      int personalPlace = -1;
+      for (int place = 0; place < standings.size(); place++) {
+        if (standings.get(place).playerId.equals(Objects.requireNonNull(player).getUniqueId())) {
+          personalEntry = standings.get(place);
+          personalPlace = place + 1;
+          break;
+        }
+      }
+      int personalScore = personalEntry == null ? bucket.getInitialValue() : personalEntry.score;
+      String personalResult =
+          personalPlace < 0
+              ? "Your place: unranked; score: "
+                  + personalScore
+                  + " "
+                  + scoreUnit(bucket, personalScore)
+              : "Your place: "
+                  + personalPlace
+                  + "; score: "
+                  + personalScore
+                  + " "
+                  + scoreUnit(bucket, personalScore);
+      sendMessage(player, Component.text(table + "\n" + personalResult));
+    }
+  }
+
+  private List<ScoreEntry> getRankedScores(String bucketId) {
+    List<ScoreEntry> standings = new ArrayList<>();
+    for (var entry : _bucketScores.get(bucketId).entrySet()) {
+      String playerName = getServer().getOfflinePlayer(entry.getKey()).getName();
+      if (playerName == null || playerName.isBlank()) {
+        playerName = entry.getKey().toString();
+      }
+      standings.add(new ScoreEntry(entry.getKey(), playerName, entry.getValue()));
+    }
+    standings.sort(
+        Comparator.comparingInt((ScoreEntry entry) -> entry.score)
+            .reversed()
+            .thenComparing(entry -> entry.playerName, String.CASE_INSENSITIVE_ORDER)
+            .thenComparing(entry -> entry.playerId.toString()));
+    return standings;
+  }
+
+  private String scoreMessage(String playerName, ScoreBucket bucket, int score) {
+    return playerName
+        + "'s "
+        + bucket.getId()
+        + " score is now "
+        + score
+        + " "
+        + scoreUnit(bucket, score)
+        + ".";
+  }
+
+  private String scoreUnit(ScoreBucket bucket, int score) {
+    return score == 1 ? bucket.getSingular() : bucket.getPlural();
+  }
+
+  private void loadScores() {
+    File scoreFile = new File(getDataFolder(), "scores.yml");
+    if (!scoreFile.isFile()) {
+      return;
+    }
+
+    YamlConfiguration scores = YamlConfiguration.loadConfiguration(scoreFile);
+    ConfigurationSection bucketSection = scores.getConfigurationSection("buckets");
+    if (bucketSection == null) {
+      loadLegacyScores(scores);
+      return;
+    }
+
+    _buckets.clear();
+    _bucketScores.clear();
+    for (String id : bucketSection.getKeys(false)) {
+      try {
+        ScoreReporting reporting =
+            parseReporting(bucketSection.getString(id + ".reporting", "none"), id);
+        createBucket(
+            id,
+            bucketSection.getString(id + ".singular", id),
+            bucketSection.getString(id + ".plural", id),
+            bucketSection.getInt(id + ".initial-value"),
+            reporting);
+      } catch (IllegalArgumentException ex) {
+        logWarning("Ignoring invalid score bucket " + id + ": " + ex.getMessage());
+      }
+    }
+    if (!_buckets.containsKey("points")) {
+      createBucket("points", "point", "points", 0);
+    }
+    _defaultBucketId = scores.getString("default-bucket", "points");
+    if (!_buckets.containsKey(_defaultBucketId)) {
+      logWarning("Unknown default score bucket; using points instead.");
+      _defaultBucketId = "points";
+    }
+
+    for (String id : _buckets.keySet()) {
+      ConfigurationSection bucketScores =
+          scores.getConfigurationSection("buckets." + id + ".scores");
+      if (bucketScores != null) {
+        loadPlayerScores(bucketScores, _bucketScores.get(id));
+      }
+    }
+    ConfigurationSection playerBuckets = scores.getConfigurationSection("player-buckets");
+    if (playerBuckets != null) {
+      for (String key : playerBuckets.getKeys(false)) {
+        try {
+          UUID playerId = UUID.fromString(key);
+          String bucketId = playerBuckets.getString(key);
+          if (_buckets.containsKey(bucketId) && !bucketId.equals(_defaultBucketId)) {
+            _playerBuckets.put(playerId, bucketId);
+          }
+        } catch (IllegalArgumentException ex) {
+          logWarning("Ignoring invalid player bucket UUID: " + key);
+        }
+      }
+    }
+    loadHighScoreRuns(scores);
+  }
+
+  private void loadArchives() {
+    File archiveFile = new File(getDataFolder(), "archives.yml");
+    if (!archiveFile.isFile()) {
+      return;
+    }
+    YamlConfiguration archives = YamlConfiguration.loadConfiguration(archiveFile);
+    ConfigurationSection archiveSection = archives.getConfigurationSection("archives");
+    if (archiveSection == null) {
+      return;
+    }
+    for (String archiveId : archiveSection.getKeys(false)) {
+      String path = "archives." + archiveId;
+      Map<String, Map<UUID, Integer>> bucketScores = new LinkedHashMap<>();
+      ConfigurationSection buckets = archives.getConfigurationSection(path + ".buckets");
+      if (buckets != null) {
+        for (String bucketId : buckets.getKeys(false)) {
+          Map<UUID, Integer> playerScores = new LinkedHashMap<>();
+          ConfigurationSection savedScores =
+              archives.getConfigurationSection(path + ".buckets." + bucketId + ".scores");
+          if (savedScores != null) {
+            loadPlayerScores(savedScores, playerScores);
+          }
+          bucketScores.put(bucketId, playerScores);
+        }
+      }
+      _scoreArchives.put(
+          archiveId,
+          new ScoreArchive(
+              archiveId,
+              archives.getString(path + ".scope", "unknown"),
+              archives.getLong(path + ".created-at"),
+              bucketScores));
+    }
+  }
+
+  private void saveArchives() {
+    YamlConfiguration archives = new YamlConfiguration();
+    for (ScoreArchive archive : _scoreArchives.values()) {
+      String path = "archives." + archive.getId();
+      archives.set(path + ".scope", archive.getScope());
+      archives.set(path + ".created-at", archive.getCreatedAtMillis());
+      for (var bucketEntry : archive.getBucketScores().entrySet()) {
+        for (var scoreEntry : bucketEntry.getValue().entrySet()) {
+          archives.set(
+              path + ".buckets." + bucketEntry.getKey() + ".scores." + scoreEntry.getKey(),
+              scoreEntry.getValue());
+        }
+      }
+    }
+    try {
+      archives.save(new File(getDataFolder(), "archives.yml"));
+    } catch (IOException ex) {
+      logError(ex);
+    }
+  }
+
+  private void loadLegacyScores(YamlConfiguration scores) {
+    loadPlayerScores(scores, _bucketScores.get("points"));
+  }
+
+  private void loadPlayerScores(ConfigurationSection scores, Map<UUID, Integer> target) {
+    for (String key : scores.getKeys(false)) {
+      try {
+        target.put(UUID.fromString(key), scores.getInt(key));
+      } catch (IllegalArgumentException ex) {
+        logWarning("Ignoring score with invalid player UUID: " + key);
+      }
+    }
+  }
+
+  private ScoreReporting parseReporting(String value, String bucketId) {
+    try {
+      return ScoreReporting.fromString(value);
+    } catch (IllegalArgumentException ex) {
+      logWarning("Ignoring invalid reporting policy for bucket " + bucketId + "; using none.");
+      return ScoreReporting.NONE;
+    }
+  }
+
+  private void loadHighScoreRuns(YamlConfiguration scores) {
+    ConfigurationSection runs = scores.getConfigurationSection("high-score-runs");
+    if (runs == null) {
+      return;
+    }
+    for (String bucketId : runs.getKeys(false)) {
+      if (!_buckets.containsKey(bucketId)) {
+        logWarning("Ignoring high-score run for unknown bucket " + bucketId + ".");
+        continue;
+      }
+      try {
+        String path = "high-score-runs." + bucketId;
+        int topN = scores.getInt(path + ".top-n");
+        if (topN < 1) {
+          throw new IllegalArgumentException("Top N must be at least 1");
+        }
+        HighScoreLifetime lifetime =
+            HighScoreLifetime.valueOf(
+                scores.getString(path + ".lifetime", "until_disabled").toUpperCase(Locale.ROOT));
+        Map<UUID, Integer> previousScores = new LinkedHashMap<>();
+        ConfigurationSection savedScores =
+            scores.getConfigurationSection(path + ".previous-scores");
+        if (savedScores != null) {
+          loadPlayerScores(savedScores, previousScores);
+        }
+        _highScoreRuns.put(
+            bucketId,
+            new HighScoreRun(
+                bucketId,
+                topN,
+                scores.getBoolean(path + ".reset-scores"),
+                lifetime,
+                scores.getInt(path + ".target-score"),
+                scores.getLong(path + ".expires-at"),
+                previousScores));
+      } catch (IllegalArgumentException ex) {
+        logWarning(
+            "Ignoring invalid high-score run for bucket " + bucketId + ": " + ex.getMessage());
+      }
+    }
+  }
+
+  private void reportScoreChange(Player player, ScoreBucket bucket, int score) {
+    ScoreReporting reporting = bucket.getReporting();
+    if (reporting == ScoreReporting.NONE) {
+      return;
+    }
+
+    String text = scoreMessage(player.getName(), bucket, score);
+    Component message = Component.text(Objects.requireNonNull(text));
+    if (reporting == ScoreReporting.PLAYER) {
+      sendMessage(player, message);
+    } else if (reporting == ScoreReporting.GLOBAL) {
+      for (Player recipient : getServer().getOnlinePlayers()) {
+        sendMessage(recipient, message);
+      }
+    } else if (reporting == ScoreReporting.ADMIN) {
+      logInfo(text);
+      for (Player recipient : getServer().getOnlinePlayers()) {
+        if (Objects.requireNonNull(recipient).isOp()
+            || recipient.hasPermission("scorekeeper.admin")) {
+          sendMessage(recipient, message);
+        }
+      }
+    }
+  }
+
+  private enum HighScoreLifetime {
+    TARGET_SCORE,
+    DURATION,
+    UNTIL_DISABLED
+  }
+
+  private static final class HighScoreRun {
+    private final String bucketId;
+    private final int topN;
+    private final boolean resetScores;
+    private final HighScoreLifetime lifetime;
+    private final int targetScore;
+    private final long expiresAtMillis;
+    private final Map<UUID, Integer> previousScores;
+
+    private HighScoreRun(
+        String bucketId,
+        int topN,
+        boolean resetScores,
+        HighScoreLifetime lifetime,
+        int targetScore,
+        long expiresAtMillis,
+        Map<UUID, Integer> previousScores) {
+      this.bucketId = bucketId;
+      this.topN = topN;
+      this.resetScores = resetScores;
+      this.lifetime = lifetime;
+      this.targetScore = targetScore;
+      this.expiresAtMillis = expiresAtMillis;
+      this.previousScores = new LinkedHashMap<>(previousScores);
+    }
+  }
+
+  private record ScoreEntry(UUID playerId, String playerName, int score) {}
+
+  public static final class ScoreArchive {
+    private final String _id;
+    private final String _scope;
+    private final long _createdAtMillis;
+    private final Map<String, Map<UUID, Integer>> _bucketScores;
+
+    private ScoreArchive(
+        String id,
+        String scope,
+        long createdAtMillis,
+        Map<String, Map<UUID, Integer>> bucketScores) {
+      _id = id;
+      _scope = scope;
+      _createdAtMillis = createdAtMillis;
+      Map<String, Map<UUID, Integer>> copiedScores = new LinkedHashMap<>();
+      for (var entry : bucketScores.entrySet()) {
+        copiedScores.put(entry.getKey(), Map.copyOf(entry.getValue()));
+      }
+      _bucketScores = Collections.unmodifiableMap(copiedScores);
+    }
+
+    public String getId() {
+      return _id;
+    }
+
+    public String getScope() {
+      return _scope;
+    }
+
+    public long getCreatedAtMillis() {
+      return _createdAtMillis;
+    }
+
+    public Map<String, Map<UUID, Integer>> getBucketScores() {
+      return _bucketScores;
+    }
   }
 
   // endregion

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/ScoreReporting.java

@@ -0,0 +1,38 @@
+/*
+This file is part of Score Keeper.
+
+Score Keeper is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Score Keeper is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with Score Keeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
+*/
+
+package com.majinnaibu.minecraft.plugins.scorekeeper;
+
+import java.util.Locale;
+
+public enum ScoreReporting {
+  ADMIN,
+  GLOBAL,
+  PLAYER,
+  NONE;
+
+  public static ScoreReporting fromString(String value) {
+    if (value == null) {
+      throw new IllegalArgumentException("Reporting policy cannot be null");
+    }
+    try {
+      return valueOf(value.toUpperCase(Locale.ROOT));
+    } catch (IllegalArgumentException ex) {
+      throw new IllegalArgumentException("Reporting must be admin, global, player or none", ex);
+    }
+  }
+}

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreAddCommand.java

@@ -17,6 +17,8 @@ along with ScoreKeeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
 
 package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
 
+import java.util.Objects;
+
 import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
 
 import net.kyori.adventure.text.Component;
@@ -76,7 +78,8 @@ public class ScoreAddCommand implements CommandExecutor {
   }
 
   private void echoError(CommandSender sender, boolean rcon, String string) {
-    _plugin.sendMessage(sender, Component.text(string).color(NamedTextColor.RED));
+    _plugin.sendMessage(
+        sender, Component.text(Objects.requireNonNull(string)).color(NamedTextColor.RED));
   }
 
   private void echoUsage(CommandSender sender, boolean rcon) {

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreArchiveCommand.java

@@ -17,13 +17,17 @@ along with ScoreKeeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
 
 package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
 
+import java.util.Objects;
+
 import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
 
 import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
 
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
 
 public class ScoreArchiveCommand implements CommandExecutor {
   private final ScoreKeeperPlugin _plugin;
@@ -34,7 +38,46 @@ public class ScoreArchiveCommand implements CommandExecutor {
 
   @Override
   public boolean onCommand(CommandSender sender, Command command, String label, String[] split) {
-    _plugin.sendMessage(sender, Component.text("archive command unimplemented"));
+    if (!sender.hasPermission("scorekeeper.admin")) {
+      sendError(sender, "You do not have permission to archive scores");
       return true;
     }
+
+    try {
+      String archiveId;
+      if (split.length == 1 && split[0].equalsIgnoreCase("all")) {
+        archiveId = _plugin.archiveAllScores();
+      } else if (split.length == 2 && split[0].equalsIgnoreCase("bucket")) {
+        archiveId = _plugin.archiveBucketScores(split[1]);
+      } else if (split.length == 0 && sender instanceof Player player) {
+        archiveId = _plugin.archivePlayerScore(player);
+      } else if (split.length == 1) {
+        Player target = _plugin.getServer().getPlayerExact(split[0]);
+        if (target == null) {
+          sendError(sender, "Can't find a player with that name");
+          return true;
+        }
+        archiveId = _plugin.archivePlayerScore(target);
+      } else {
+        sendUsage(sender);
+        return true;
+      }
+      _plugin.sendMessage(sender, Component.text("Saved score archive " + archiveId + "."));
+    } catch (IllegalArgumentException ex) {
+      sendError(sender, ex.getMessage());
+    }
+    return true;
+  }
+
+  private void sendError(CommandSender sender, String message) {
+    _plugin.sendMessage(
+        sender, Component.text(Objects.requireNonNull(message)).color(NamedTextColor.RED));
+  }
+
+  private void sendUsage(CommandSender sender) {
+    _plugin.sendMessage(
+        sender,
+        Component.text("Usage: /score-archive [playerName|all] | /score-archive bucket <bucketId>")
+            .color(NamedTextColor.YELLOW));
+  }
 }

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreArchiveListCommand.java

@@ -0,0 +1,131 @@
+/*
+This file is part of Score Keeper.
+
+Score Keeper is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Score Keeper is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with Score Keeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
+*/
+
+package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
+
+import java.time.Instant;
+import java.util.Comparator;
+import java.util.Map;
+import java.util.UUID;
+
+import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreBucket;
+import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+
+import org.bukkit.OfflinePlayer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+
+public class ScoreArchiveListCommand implements CommandExecutor {
+  private final ScoreKeeperPlugin _plugin;
+
+  public ScoreArchiveListCommand(ScoreKeeperPlugin plugin) {
+    _plugin = plugin;
+  }
+
+  @Override
+  public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    if (args.length == 0) {
+      var archives = _plugin.getScoreArchives();
+      if (archives.isEmpty()) {
+        _plugin.sendMessage(sender, Component.text("No score archives have been saved."));
+      } else {
+        archives.stream()
+            .sorted(
+                Comparator.comparingLong(
+                        (ScoreKeeperPlugin.ScoreArchive archive) -> archive.getCreatedAtMillis())
+                    .reversed())
+            .forEach(
+                archive ->
+                    _plugin.sendMessage(
+                        sender,
+                        Component.text(
+                            archive.getId()
+                                + " | "
+                                + archive.getScope()
+                                + " | "
+                                + Instant.ofEpochMilli(archive.getCreatedAtMillis()))));
+      }
+      return true;
+    }
+
+    if (args.length != 1) {
+      sendUsage(sender);
+      return true;
+    }
+    ScoreKeeperPlugin.ScoreArchive archive = _plugin.getScoreArchive(args[0]);
+    if (archive == null) {
+      _plugin.sendMessage(
+          sender,
+          Component.text("No score archive exists with ID " + args[0] + ".")
+              .color(NamedTextColor.RED));
+      return true;
+    }
+
+    _plugin.sendMessage(
+        sender,
+        Component.text(
+            "Archive "
+                + archive.getId()
+                + " ("
+                + archive.getScope()
+                + ", "
+                + Instant.ofEpochMilli(archive.getCreatedAtMillis())
+                + ")"));
+    for (var bucketEntry : archive.getBucketScores().entrySet()) {
+      ScoreBucket bucket = _plugin.getBucket(bucketEntry.getKey());
+      _plugin.sendMessage(sender, Component.text("Bucket " + bucketEntry.getKey() + ":"));
+      bucketEntry.getValue().entrySet().stream()
+          .sorted(
+              Map.Entry.<UUID, Integer>comparingByValue()
+                  .reversed()
+                  .thenComparing(entry -> entry.getKey().toString()))
+          .forEach(
+              entry ->
+                  _plugin.sendMessage(
+                      sender,
+                      Component.text(
+                          displayName(entry.getKey())
+                              + " - "
+                              + entry.getValue()
+                              + " "
+                              + scoreUnit(bucket, entry.getValue()))));
+    }
+    return true;
+  }
+
+  private String displayName(UUID playerId) {
+    OfflinePlayer player = _plugin.getServer().getOfflinePlayer(playerId);
+    return player.getName() == null ? playerId.toString() : player.getName();
+  }
+
+  private String scoreUnit(ScoreBucket bucket, int score) {
+    if (bucket == null) {
+      return "scores";
+    }
+    return score == 1 ? bucket.getSingular() : bucket.getPlural();
+  }
+
+  private void sendUsage(CommandSender sender) {
+    _plugin.sendMessage(
+        sender,
+        Component.text("Usage: /score-archive-list [archiveId]").color(NamedTextColor.YELLOW));
+  }
+}

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreBucketCommand.java

@@ -0,0 +1,138 @@
+/*
+This file is part of Score Keeper.
+
+Score Keeper is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Score Keeper is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with Score Keeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
+*/
+
+package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
+
+import java.util.Objects;
+
+import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreBucket;
+import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
+import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreReporting;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class ScoreBucketCommand implements CommandExecutor {
+  private final ScoreKeeperPlugin _plugin;
+
+  public ScoreBucketCommand(ScoreKeeperPlugin plugin) {
+    _plugin = plugin;
+  }
+
+  @Override
+  public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    if (args.length == 0) {
+      if (sender instanceof Player player) {
+        String bucketId = _plugin.getPlayerBucket(player);
+        ScoreBucket bucket = _plugin.getBucket(bucketId);
+        _plugin.sendMessage(
+            sender,
+            Component.text(
+                "You are tracking " + bucket.getId() + " (" + bucket.getPlural() + ")."));
+      } else {
+        sendUsage(sender);
+      }
+      return true;
+    }
+
+    if ((args.length == 5 || args.length == 6) && args[0].equalsIgnoreCase("create")) {
+      if (!requireAdmin(sender)) {
+        return true;
+      }
+      try {
+        ScoreReporting reporting =
+            args.length == 6 ? ScoreReporting.fromString(args[5]) : ScoreReporting.NONE;
+        _plugin.createBucket(args[1], args[2], args[3], Integer.parseInt(args[4]), reporting);
+        _plugin.sendMessage(sender, Component.text("Created score bucket " + args[1] + "."));
+      } catch (IllegalArgumentException ex) {
+        sendError(sender, ex.getMessage());
+      }
+      return true;
+    }
+
+    if (args.length == 1 && sender instanceof Player player) {
+      switchPlayerBucket(sender, player, args[0]);
+      return true;
+    }
+
+    if (args.length == 2) {
+      if (!requireAdmin(sender)) {
+        return true;
+      }
+      if (args[0].equalsIgnoreCase("all")) {
+        try {
+          _plugin.switchAllPlayers(args[1]);
+          _plugin.sendMessage(
+              sender, Component.text("All players are now tracking " + args[1] + "."));
+        } catch (IllegalArgumentException ex) {
+          sendError(sender, ex.getMessage());
+        }
+        return true;
+      }
+
+      Player target = _plugin.getServer().getPlayerExact(args[0]);
+      if (target == null) {
+        sendError(sender, "Can't find a player with that name");
+      } else {
+        switchPlayerBucket(sender, target, args[1]);
+      }
+      return true;
+    }
+
+    sendUsage(sender);
+    return true;
+  }
+
+  private void switchPlayerBucket(CommandSender sender, Player target, String bucketId) {
+    try {
+      _plugin.switchPlayerBucket(target, bucketId);
+      if (sender != target) {
+        _plugin.sendMessage(
+            sender, Component.text(target.getName() + " is now tracking " + bucketId + "."));
+      }
+    } catch (IllegalArgumentException ex) {
+      sendError(sender, ex.getMessage());
+    }
+  }
+
+  private boolean requireAdmin(CommandSender sender) {
+    if (sender.hasPermission("scorekeeper.admin")) {
+      return true;
+    }
+    sendError(sender, "You do not have permission to manage score buckets");
+    return false;
+  }
+
+  private void sendError(CommandSender sender, String message) {
+    _plugin.sendMessage(
+        sender, Component.text(Objects.requireNonNull(message)).color(NamedTextColor.RED));
+  }
+
+  private void sendUsage(CommandSender sender) {
+    _plugin.sendMessage(
+        sender,
+        Component.text(
+                "Usage: /score-bucket [bucketId] | create <id> <singular> <plural> <initialValue>"
+                    + " | <player|all> <bucketId>")
+            .color(NamedTextColor.YELLOW));
+  }
+}

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreGetCommand.java

@@ -17,6 +17,8 @@ along with ScoreKeeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
 
 package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
 
+import java.util.Objects;
+
 import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
 
 import net.kyori.adventure.text.Component;
@@ -84,7 +86,8 @@ public class ScoreGetCommand implements CommandExecutor {
   }
 
   private void echoError(CommandSender sender, boolean rcon, String string) {
-    _plugin.sendMessage(sender, Component.text(string).color(NamedTextColor.RED));
+    _plugin.sendMessage(
+        sender, Component.text(Objects.requireNonNull(string)).color(NamedTextColor.RED));
   }
 
   private void echoUsage(CommandSender sender, boolean rcon) {

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreResetCommand.java

@@ -17,6 +17,8 @@ along with ScoreKeeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
 
 package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
 
+import java.util.Objects;
+
 import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
 
 import net.kyori.adventure.text.Component;
@@ -62,7 +64,8 @@ public class ScoreResetCommand implements CommandExecutor {
   }
 
   private void echoError(CommandSender sender, boolean rcon, String string) {
-    _plugin.sendMessage(sender, Component.text(string).color(NamedTextColor.RED));
+    _plugin.sendMessage(
+        sender, Component.text(Objects.requireNonNull(string)).color(NamedTextColor.RED));
   }
 
   private void echoUsage(CommandSender sender, boolean rcon) {

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreRunCommand.java

@@ -0,0 +1,125 @@
+/*
+This file is part of Score Keeper.
+
+Score Keeper is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Score Keeper is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with Score Keeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
+*/
+
+package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
+
+import java.time.Duration;
+import java.util.Objects;
+
+import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+
+public class ScoreRunCommand implements CommandExecutor {
+  private final ScoreKeeperPlugin _plugin;
+
+  public ScoreRunCommand(ScoreKeeperPlugin plugin) {
+    _plugin = plugin;
+  }
+
+  @Override
+  public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    if (!sender.hasPermission("scorekeeper.admin")) {
+      sendError(sender, "You do not have permission to manage high-score runs");
+      return true;
+    }
+
+    if (args.length == 2 && args[0].equalsIgnoreCase("stop")) {
+      try {
+        _plugin.stopHighScoreRun(args[1]);
+      } catch (IllegalArgumentException ex) {
+        sendError(sender, ex.getMessage());
+      }
+      return true;
+    }
+
+    if (args.length < 5 || !args[0].equalsIgnoreCase("start")) {
+      sendUsage(sender);
+      return true;
+    }
+
+    String bucketId = args[1];
+    try {
+      int topN = Integer.parseInt(args[2]);
+      boolean resetScores = parseBoolean(args[3]);
+      String lifetime = args[4].toLowerCase();
+      if (lifetime.equals("target") && args.length == 6) {
+        _plugin.startTargetScoreRun(bucketId, topN, resetScores, Integer.parseInt(args[5]));
+      } else if (lifetime.equals("duration") && args.length == 6) {
+        _plugin.startTimedScoreRun(bucketId, topN, resetScores, parseDuration(args[5]));
+      } else if (lifetime.equals("until-disabled") && args.length == 5) {
+        _plugin.startUntilDisabledScoreRun(bucketId, topN, resetScores);
+      } else {
+        sendUsage(sender);
+        return true;
+      }
+      _plugin.sendMessage(sender, Component.text("Started a high-score run for " + bucketId + "."));
+    } catch (IllegalArgumentException ex) {
+      sendError(sender, ex.getMessage());
+    }
+    return true;
+  }
+
+  private boolean parseBoolean(String value) {
+    if (value.equalsIgnoreCase("true")) {
+      return true;
+    }
+    if (value.equalsIgnoreCase("false")) {
+      return false;
+    }
+    throw new IllegalArgumentException("Reset scores must be true or false");
+  }
+
+  private Duration parseDuration(String value) {
+    if (!value.matches("[0-9]+[smhdw]")) {
+      throw new IllegalArgumentException(
+          "Duration must use seconds, minutes, hours, days or weeks (e.g. 4h)");
+    }
+    long amount = Long.parseLong(value.substring(0, value.length() - 1));
+    try {
+      return switch (value.charAt(value.length() - 1)) {
+        case 's' -> Duration.ofSeconds(amount);
+        case 'm' -> Duration.ofMinutes(amount);
+        case 'h' -> Duration.ofHours(amount);
+        case 'd' -> Duration.ofDays(amount);
+        case 'w' -> Duration.ofDays(Math.multiplyExact(amount, 7));
+        default -> throw new IllegalArgumentException("Unsupported duration unit");
+      };
+    } catch (ArithmeticException ex) {
+      throw new IllegalArgumentException("Duration is too large", ex);
+    }
+  }
+
+  private void sendError(CommandSender sender, String message) {
+    _plugin.sendMessage(
+        sender, Component.text(Objects.requireNonNull(message)).color(NamedTextColor.RED));
+  }
+
+  private void sendUsage(CommandSender sender) {
+    _plugin.sendMessage(
+        sender,
+        Component.text(
+                "Usage: /score-run start <bucket> <topN> <reset:true|false> "
+                    + "<target <score>|duration <time>|until-disabled> | /score-run stop <bucket>")
+            .color(NamedTextColor.YELLOW));
+  }
+}

src/main/java/com/majinnaibu/minecraft/plugins/scorekeeper/commands/ScoreSubtractCommand.java

@@ -17,6 +17,8 @@ along with ScoreKeeper. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
 
 package com.majinnaibu.minecraft.plugins.scorekeeper.commands;
 
+import java.util.Objects;
+
 import com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin;
 
 import net.kyori.adventure.text.Component;
@@ -76,7 +78,8 @@ public class ScoreSubtractCommand implements CommandExecutor {
   }
 
   private void echoError(CommandSender sender, boolean rcon, String string) {
-    _plugin.sendMessage(sender, Component.text(string).color(NamedTextColor.RED));
+    _plugin.sendMessage(
+        sender, Component.text(Objects.requireNonNull(string)).color(NamedTextColor.RED));
   }
 
   private void echoUsage(CommandSender sender, boolean rcon) {

src/main/resources/plugin.yml

@@ -1,7 +1,7 @@
 name: ScoreKeeper
 main: com.majinnaibu.minecraft.plugins.scorekeeper.ScoreKeeperPlugin
 version: ${version}
-api-version: 1.21
+api-version: '26.2'
 commands:
     score-get:
         description: Displays the player's score.
@@ -18,4 +18,17 @@ commands:
     score-archive:
         description: Archives and resets the player's score
         usage: /score-archive [playername]
+    score-archive-list:
+        description: Lists saved score archives or displays one archive.
+        usage: /score-archive-list [archiveId]
+    score-bucket:
+        description: Selects or manages score buckets.
+        usage: /score-bucket [bucketId] | create <id> <singular> <plural> <initialValue> [admin|global|player|none] | <player|all> <bucketId>
+    score-run:
+        description: Starts or stops a high-score run.
+        usage: /score-run start <bucket> <topN> <reset:true|false> <target <score>|duration <time>|until-disabled> | /score-run stop <bucket>
+permissions:
+    scorekeeper.admin:
+        description: Allows managing score buckets.
+        default: op
         

tools/backup-server.sh

@@ -0,0 +1,103 @@
+#!/usr/bin/env bash
+# Backs up plugins, config, worlds, and settings from MINECRAFT_SERVER_PATH
+# to MINECRAFT_BACKUP_PATH/backup-<timestamp>[-label].tar.bz2.
+#
+# Usage: backup-server.sh [-f|--force] [label]
+#   -f  Back up even if the server is running (worlds may be inconsistent).
+
+set -euo pipefail
+
+TOOLS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$TOOLS_DIR/.." && pwd)"
+if [[ ! -r "$PROJECT_ROOT/.env" ]]; then
+  echo "Error: $PROJECT_ROOT/.env is missing or unreadable. Copy .env.example to .env and set its values." >&2
+  exit 1
+fi
+load_project_env() {
+  local env_line env_key env_value first_char last_char
+  while IFS= read -r env_line || [[ -n "$env_line" ]]; do
+    env_line="${env_line%$'\r'}"
+    [[ "$env_line" =~ ^[[:space:]]*(#|$) ]] && continue
+    [[ "$env_line" == *=* ]] || continue
+
+    env_key="${env_line%%=*}"
+    env_value="${env_line#*=}"
+    env_key="${env_key#"${env_key%%[![:space:]]*}"}"
+    env_key="${env_key%"${env_key##*[![:space:]]}"}"
+    [[ "$env_key" =~ ^[A-Za-z_][A-Za-z0-9_]*$ ]] || continue
+    env_value="${env_value#"${env_value%%[![:space:]]*}"}"
+    env_value="${env_value%"${env_value##*[![:space:]]}"}"
+
+    if (( ${#env_value} >= 2 )); then
+      first_char="${env_value:0:1}"
+      last_char="${env_value:$((${#env_value} - 1)):1}"
+      if [[ "$first_char" == "$last_char" && ( "$first_char" == '"' || "$first_char" == "'" ) ]]; then
+        env_value="${env_value:1:$((${#env_value} - 2))}"
+      fi
+    fi
+
+    if [[ -z "${!env_key:-}" ]]; then
+      export "$env_key=$env_value"
+    fi
+  done < "$PROJECT_ROOT/.env"
+}
+load_project_env
+
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH:-MCServer}"
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH/#\~/$HOME}"
+[[ "$MINECRAFT_SERVER_PATH" == /* ]] || MINECRAFT_SERVER_PATH="$PROJECT_ROOT/$MINECRAFT_SERVER_PATH"
+MINECRAFT_BACKUP_PATH="${MINECRAFT_BACKUP_PATH:-backups}"
+MINECRAFT_BACKUP_PATH="${MINECRAFT_BACKUP_PATH/#\~/$HOME}"
+[[ "$MINECRAFT_BACKUP_PATH" == /* ]] || MINECRAFT_BACKUP_PATH="$PROJECT_ROOT/$MINECRAFT_BACKUP_PATH"
+
+FORCE=false
+LABEL=""
+for arg in "$@"; do
+  case "$arg" in
+    -f|--force) FORCE=true ;;
+    -h|--help) sed -n '2,7p' "$0"; exit 0 ;;
+    -*) echo "Unknown option: $arg" >&2; exit 1 ;;
+    *) LABEL="$arg" ;;
+  esac
+done
+
+[[ -d "$MINECRAFT_SERVER_PATH" ]] || { echo "Error: $MINECRAFT_SERVER_PATH does not exist." >&2; exit 1; }
+
+if pgrep -f "java.*paper-.*\.jar" >/dev/null && ! $FORCE; then
+  echo "Error: the server is running. Stop it first (tools/stop-server.sh) or pass --force." >&2
+  exit 1
+fi
+
+cd "$MINECRAFT_SERVER_PATH"
+shopt -s nullglob
+
+ITEMS=()
+[[ -d plugins ]] && ITEMS+=(plugins)
+[[ -d config ]] && ITEMS+=(config)
+for dir in */; do
+  dir="${dir%/}"
+  [[ -f "$dir/level.dat" ]] && ITEMS+=("$dir")
+done
+for f in *.yml *.yaml *.json *.properties eula.txt; do
+  ITEMS+=("$f")
+done
+
+if (( ${#ITEMS[@]} == 0 )); then
+  echo "Error: nothing to back up in $MINECRAFT_SERVER_PATH." >&2
+  exit 1
+fi
+
+# Keep labels filename-safe.
+LABEL="${LABEL//[^A-Za-z0-9._-]/_}"
+NAME="backup-$(date +%Y%m%d-%H%M%S)${LABEL:+-$LABEL}.tar.bz2"
+mkdir -p "$MINECRAFT_BACKUP_PATH"
+ARCHIVE="$MINECRAFT_BACKUP_PATH/$NAME"
+
+echo "Backing up: ${ITEMS[*]}"
+trap 'rm -f "$ARCHIVE.part"' EXIT
+tar --exclude 'plugins/.paper-remapped' --exclude '*/session.lock' \
+  -cjf "$ARCHIVE.part" "${ITEMS[@]}"
+mv "$ARCHIVE.part" "$ARCHIVE"
+trap - EXIT
+
+echo "Created $ARCHIVE ($(du -h "$ARCHIVE" | awk '{print $1}'))"

tools/bash/build-plugin.sh

@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-# Find project root (two directories above this script)
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
-
-cd "$PROJECT_ROOT"
-
-./gradlew build 

tools/bash/deploy-plugin.sh

@@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-if [[ -z "$MINECRAFT_SERVER_PATH" ]]; then
-  echo "Error: MINECRAFT_SERVER_PATH environment variable is not set."
-  exit 1
-fi
-
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
-
-PLUGIN_JAR=$(ls -t "$PROJECT_ROOT"/build/libs/*.jar 2>/dev/null | head -n1)
-if [[ ! -f "$PLUGIN_JAR" ]]; then
-  echo "Error: No plugin jar found in $PROJECT_ROOT/build/libs. Build the plugin first."
-  exit 1
-fi
-
-# Optional: Warn if jar is older than any source file
-if find "$PROJECT_ROOT/src/main/java" "$PROJECT_ROOT/src/main/resources" -type f -newer "$PLUGIN_JAR" | grep -q .; then
-  echo "Warning: The built plugin jar is older than some source files. Consider rebuilding."
-fi
-
-mkdir -p "$MINECRAFT_SERVER_PATH/plugins"
-cp "$PLUGIN_JAR" "$MINECRAFT_SERVER_PATH/plugins/"
-echo "Deployed $PLUGIN_JAR to $MINECRAFT_SERVER_PATH/plugins/" 

tools/bash/start-server.sh

@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-# Check required environment variables
-if [[ -z "$MINECRAFT_SERVER_PATH" || -z "$MINECRAFT_SERVER_JAR" ]]; then
-  echo "Error: MINECRAFT_SERVER_PATH and MINECRAFT_SERVER_JAR must be set."
-  exit 1
-fi
-
-cd "$MINECRAFT_SERVER_PATH"
-
-# Find running server process (java with the server jar)
-SERVER_PID=$(pgrep -f "java.*$MINECRAFT_SERVER_JAR" || true)
-
-if [[ -n "$SERVER_PID" ]]; then
-  echo "Minecraft server is running (PID: $SERVER_PID). Stopping it..."
-  kill "$SERVER_PID"
-  sleep 5
-else
-  echo "Minecraft server is not running."
-fi
-
-# Start the server (in a detached screen session)
-pushd "${MINECRAFT_SERVER_PATH}"
-java -jar "${MINECRAFT_SERVER_JAR}"
-popd

tools/bash/stop-server.sh

@@ -1,21 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-if [[ -z "$MINECRAFT_SERVER_PATH" || -z "$MINECRAFT_SERVER_JAR" ]]; then
-  echo "Error: MINECRAFT_SERVER_PATH and MINECRAFT_SERVER_JAR must be set."
-  exit 1
-fi
-
-cd "$MINECRAFT_SERVER_PATH"
-
-SERVER_PID=$(pgrep -f "java.*$MINECRAFT_SERVER_JAR" || true)
-
-if [[ -n "$SERVER_PID" ]]; then
-  echo "Minecraft server is running (PID: $SERVER_PID). Stopping it..."
-  kill "$SERVER_PID"
-  sleep 5
-  echo "Minecraft server stopped."
-else
-  echo "Minecraft server is not running."
-fi

tools/build-plugin.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+export GRADLE_USER_HOME="${GRADLE_USER_HOME:-$PROJECT_ROOT/.gradle/user-home}"
+mkdir -p "$GRADLE_USER_HOME/jdks"
+
+ensure_java_25() {
+  local version="25"
+  local os arch archive java_bin actual_home
+
+  case "$(uname -s)" in
+    Darwin) os="mac" ;;
+    Linux) os="linux" ;;
+    *) echo "Unsupported OS: $(uname -s)" >&2; exit 1 ;;
+  esac
+
+  case "$(uname -m)" in
+    arm64|aarch64) arch="aarch64" ;;
+    x86_64|amd64) arch="x64" ;;
+    *) echo "Unsupported architecture: $(uname -m)" >&2; exit 1 ;;
+  esac
+
+  java_bin=$(find "$GRADLE_USER_HOME/jdks" -path '*/bin/java' -type f 2>/dev/null | head -n 1 || true)
+  if [[ -z "$java_bin" ]]; then
+    echo "Downloading Temurin JDK $version into $GRADLE_USER_HOME/jdks..."
+    archive="$GRADLE_USER_HOME/jdks/temurin-$version.tar.gz"
+    curl -fsSL "https://api.adoptium.net/v3/binary/latest/$version/ga/${os}/${arch}/jdk/hotspot/normal/eclipse" -o "$archive"
+    tar -xzf "$archive" -C "$GRADLE_USER_HOME/jdks"
+    rm -f "$archive"
+    java_bin=$(find "$GRADLE_USER_HOME/jdks" -path '*/bin/java' -type f 2>/dev/null | head -n 1 || true)
+  fi
+
+  [[ -n "$java_bin" ]] || { echo "Error: could not locate installed JDK 25." >&2; exit 1; }
+  actual_home="$(dirname "$(dirname "$java_bin")")"
+  export JAVA_HOME="$actual_home"
+  export PATH="$JAVA_HOME/bin:$PATH"
+}
+
+ensure_java_25
+cd "$PROJECT_ROOT"
+./gradlew build "$@"

tools/deploy-plugin.sh

@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+if [[ ! -r "$PROJECT_ROOT/.env" ]]; then
+  echo "Error: $PROJECT_ROOT/.env is missing or unreadable. Copy .env.example to .env and set its values." >&2
+  exit 1
+fi
+load_project_env() {
+  local env_line env_key env_value first_char last_char
+  while IFS= read -r env_line || [[ -n "$env_line" ]]; do
+    env_line="${env_line%$'\r'}"
+    [[ "$env_line" =~ ^[[:space:]]*(#|$) ]] && continue
+    [[ "$env_line" == *=* ]] || continue
+
+    env_key="${env_line%%=*}"
+    env_value="${env_line#*=}"
+    env_key="${env_key#"${env_key%%[![:space:]]*}"}"
+    env_key="${env_key%"${env_key##*[![:space:]]}"}"
+    [[ "$env_key" =~ ^[A-Za-z_][A-Za-z0-9_]*$ ]] || continue
+    env_value="${env_value#"${env_value%%[![:space:]]*}"}"
+    env_value="${env_value%"${env_value##*[![:space:]]}"}"
+
+    if (( ${#env_value} >= 2 )); then
+      first_char="${env_value:0:1}"
+      last_char="${env_value:$((${#env_value} - 1)):1}"
+      if [[ "$first_char" == "$last_char" && ( "$first_char" == '"' || "$first_char" == "'" ) ]]; then
+        env_value="${env_value:1:$((${#env_value} - 2))}"
+      fi
+    fi
+
+    if [[ -z "${!env_key:-}" ]]; then
+      export "$env_key=$env_value"
+    fi
+  done < "$PROJECT_ROOT/.env"
+}
+load_project_env
+
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH:-MCServer}"
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH/#\~/$HOME}"
+[[ "$MINECRAFT_SERVER_PATH" == /* ]] || MINECRAFT_SERVER_PATH="$PROJECT_ROOT/$MINECRAFT_SERVER_PATH"
+
+if [[ -z "$MINECRAFT_SERVER_PATH" ]]; then
+  echo "Error: MINECRAFT_SERVER_PATH environment variable is not set."
+  exit 1
+fi
+
+PLUGIN_JAR=$(ls -t "$PROJECT_ROOT"/build/libs/*.jar 2>/dev/null | grep -v -- '-all\.jar$' | head -n1)
+if [[ ! -f "$PLUGIN_JAR" ]]; then
+  echo "Error: No plugin jar found in $PROJECT_ROOT/build/libs. Build the plugin first."
+  exit 1
+fi
+
+# Optional: Warn if jar is older than any source file
+if find "$PROJECT_ROOT/src/main/java" "$PROJECT_ROOT/src/main/resources" -type f -newer "$PLUGIN_JAR" | grep -q .; then
+  echo "Warning: The built plugin jar is older than some source files. Consider rebuilding."
+fi
+
+mkdir -p "$MINECRAFT_SERVER_PATH/plugins"
+cp "$PLUGIN_JAR" "$MINECRAFT_SERVER_PATH/plugins/"
+echo "Deployed $PLUGIN_JAR to $MINECRAFT_SERVER_PATH/plugins/" 

tools/publish-local.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+export GRADLE_USER_HOME="${GRADLE_USER_HOME:-$PROJECT_ROOT/.gradle/user-home}"
+mkdir -p "$GRADLE_USER_HOME/jdks"
+
+ensure_java_25() {
+  local version="25"
+  local os arch archive java_bin actual_home
+
+  case "$(uname -s)" in
+    Darwin) os="mac" ;;
+    Linux) os="linux" ;;
+    *) echo "Unsupported OS: $(uname -s)" >&2; exit 1 ;;
+  esac
+
+  case "$(uname -m)" in
+    arm64|aarch64) arch="aarch64" ;;
+    x86_64|amd64) arch="x64" ;;
+    *) echo "Unsupported architecture: $(uname -m)" >&2; exit 1 ;;
+  esac
+
+  java_bin=$(find "$GRADLE_USER_HOME/jdks" -path '*/bin/java' -type f 2>/dev/null | head -n 1 || true)
+  if [[ -z "$java_bin" ]]; then
+    echo "Downloading Temurin JDK $version into $GRADLE_USER_HOME/jdks..."
+    archive="$GRADLE_USER_HOME/jdks/temurin-$version.tar.gz"
+    curl -fsSL "https://api.adoptium.net/v3/binary/latest/$version/ga/${os}/${arch}/jdk/hotspot/normal/eclipse" -o "$archive"
+    tar -xzf "$archive" -C "$GRADLE_USER_HOME/jdks"
+    rm -f "$archive"
+    java_bin=$(find "$GRADLE_USER_HOME/jdks" -path '*/bin/java' -type f 2>/dev/null | head -n 1 || true)
+  fi
+
+  [[ -n "$java_bin" ]] || { echo "Error: could not locate installed JDK 25." >&2; exit 1; }
+  actual_home="$(dirname "$(dirname "$java_bin")")"
+  export JAVA_HOME="$actual_home"
+  export PATH="$JAVA_HOME/bin:$PATH"
+}
+
+ensure_java_25
+cd "$PROJECT_ROOT"
+./gradlew publishToMavenLocal "$@"

tools/publish-modrinth.sh

@@ -0,0 +1,169 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+if [[ ! -r "$PROJECT_ROOT/.env" ]]; then
+  echo "Error: $PROJECT_ROOT/.env is missing or unreadable. Copy .env.example to .env and set its values." >&2
+  exit 1
+fi
+load_project_env() {
+  local env_line env_key env_value first_char last_char
+  while IFS= read -r env_line || [[ -n "$env_line" ]]; do
+    env_line="${env_line%$'\r'}"
+    [[ "$env_line" =~ ^[[:space:]]*(#|$) ]] && continue
+    [[ "$env_line" == *=* ]] || continue
+
+    env_key="${env_line%%=*}"
+    env_value="${env_line#*=}"
+    env_key="${env_key#"${env_key%%[![:space:]]*}"}"
+    env_key="${env_key%"${env_key##*[![:space:]]}"}"
+    [[ "$env_key" =~ ^[A-Za-z_][A-Za-z0-9_]*$ ]] || continue
+    env_value="${env_value#"${env_value%%[![:space:]]*}"}"
+    env_value="${env_value%"${env_value##*[![:space:]]}"}"
+
+    if (( ${#env_value} >= 2 )); then
+      first_char="${env_value:0:1}"
+      last_char="${env_value:$((${#env_value} - 1)):1}"
+      if [[ "$first_char" == "$last_char" && ( "$first_char" == '"' || "$first_char" == "'" ) ]]; then
+        env_value="${env_value:1:$((${#env_value} - 2))}"
+      fi
+    fi
+
+    if [[ -z "${!env_key:-}" ]]; then
+      export "$env_key=$env_value"
+    fi
+  done < "$PROJECT_ROOT/.env"
+}
+load_project_env
+
+# Required env:
+#   MODRINTH_TOKEN
+#   MODRINTH_PROJECT_ID (project ID or slug)
+#   MODRINTH_GAME_VERSIONS (optional comma-separated list; defaults to 1.21 through 1.21.7)
+#   MODRINTH_LOADERS (optional, comma-separated, default paper)
+#   MODRINTH_CHANGELOG (optional)
+# Optional:
+#   MODRINTH_DEPENDENCIES (optional JSON array or a single JSON string)
+#   MODRINTH_FILE (optional path to the jar; defaults to build/libs/*.jar)
+
+MODRINTH_TOKEN="${MODRINTH_TOKEN:-}"
+MODRINTH_PROJECT_ID="${MODRINTH_PROJECT_ID:-5NYwxysp}"
+generate_changelog() {
+  local current_tag previous_tag range commits
+  current_tag=$(git -C "$PROJECT_ROOT" describe --tags --exact-match HEAD 2>/dev/null || true)
+  if [[ -n "$current_tag" ]]; then
+    previous_tag=$(git -C "$PROJECT_ROOT" describe --tags --abbrev=0 "${current_tag}^" 2>/dev/null || true)
+    range="${previous_tag:+$previous_tag..}$current_tag"
+  else
+    previous_tag=$(git -C "$PROJECT_ROOT" describe --tags --abbrev=0 2>/dev/null || true)
+    range="${previous_tag:+$previous_tag..}HEAD"
+  fi
+  commits=$(git -C "$PROJECT_ROOT" log --no-merges --format='- %s (%h)' "$range" 2>/dev/null || true)
+  if [[ -z "$commits" ]]; then
+    commits='- No commit messages found for this release.'
+  fi
+  printf '%s\n\n%s\n' "## What's Changed" "$commits"
+}
+MODRINTH_CHANGELOG="${MODRINTH_CHANGELOG:-$(generate_changelog)}"
+MODRINTH_GAME_VERSIONS="${MODRINTH_GAME_VERSIONS:-26.2,26.3}"
+MODRINTH_LOADERS="${MODRINTH_LOADERS:-paper}"
+MODRINTH_VERSION_TYPE="${MODRINTH_VERSION_TYPE:-}"
+MODRINTH_FILE="${MODRINTH_FILE:-}"
+MODRINTH_DEPENDENCIES="${MODRINTH_DEPENDENCIES:-}"
+
+MODRINTH_VERSION=$(
+  "$PROJECT_ROOT/gradlew" -q -p "$PROJECT_ROOT" properties --property version \
+    | sed -n 's/^version: //p'
+)
+if [[ -z "$MODRINTH_VERSION" ]]; then
+  echo "Error: could not determine the project version from Gradle." >&2
+  exit 1
+fi
+if [[ -z "$MODRINTH_VERSION_TYPE" ]]; then
+  if [[ "$MODRINTH_VERSION" == *-* ]]; then
+    MODRINTH_VERSION_TYPE="beta"
+  else
+    MODRINTH_VERSION_TYPE="release"
+  fi
+fi
+case "$MODRINTH_VERSION_TYPE" in
+  release|beta|alpha) ;;
+  *) echo "Error: MODRINTH_VERSION_TYPE must be release, beta, or alpha." >&2; exit 1 ;;
+esac
+MODRINTH_VERSION_NAME="ScoreKeeper $MODRINTH_VERSION"
+
+if [[ -n "$MODRINTH_FILE" && "$MODRINTH_FILE" != /* ]]; then
+  MODRINTH_FILE="$PROJECT_ROOT/$MODRINTH_FILE"
+fi
+
+if [[ -z "$MODRINTH_TOKEN" ]]; then
+  echo "Error: MODRINTH_TOKEN is not set in $PROJECT_ROOT/.env" >&2
+  exit 1
+fi
+if [[ -z "$MODRINTH_FILE" ]]; then
+  MODRINTH_FILE=$(ls -t "$PROJECT_ROOT"/build/libs/*.jar 2>/dev/null | grep -v -- '-all\.jar$' | head -n1 || true)
+fi
+if [[ -z "$MODRINTH_FILE" || ! -f "$MODRINTH_FILE" ]]; then
+  echo "Error: no jar found for Modrinth upload. Build the project first or set MODRINTH_FILE." >&2
+  exit 1
+fi
+if ! command -v unzip >/dev/null; then
+  echo "Error: 'unzip' is required to verify the plugin version in the jar." >&2
+  exit 1
+fi
+JAR_VERSION=$(unzip -p "$MODRINTH_FILE" plugin.yml 2>/dev/null | sed -n 's/^version: //p' | head -n1 || true)
+if [[ -z "$JAR_VERSION" ]]; then
+  echo "Error: could not read the plugin version from $MODRINTH_FILE." >&2
+  exit 1
+fi
+if [[ "$JAR_VERSION" != "$MODRINTH_VERSION" ]]; then
+  echo "Error: jar version $JAR_VERSION does not match Gradle version $MODRINTH_VERSION. Rebuild the plugin and retry." >&2
+  exit 1
+fi
+
+csv_to_json_array() {
+  jq -cn --arg csv "$1" '$csv | split(",") | map(gsub("^\\s+|\\s+$"; "")) | map(select(length > 0))'
+}
+MODRINTH_GAME_VERSIONS_JSON=$(csv_to_json_array "$MODRINTH_GAME_VERSIONS")
+MODRINTH_LOADERS_JSON=$(csv_to_json_array "$MODRINTH_LOADERS")
+if [[ -n "$MODRINTH_DEPENDENCIES" ]]; then
+  if ! MODRINTH_DEPENDENCIES_JSON=$(jq -ce 'if type == "array" then . else error("dependencies must be a JSON array") end' <<<"$MODRINTH_DEPENDENCIES"); then
+    echo "Error: MODRINTH_DEPENDENCIES must be a JSON array." >&2
+    exit 1
+  fi
+else
+  MODRINTH_DEPENDENCIES_JSON='[]'
+fi
+
+MODRINTH_DATA=$(jq -cn \
+  --arg project_id "$MODRINTH_PROJECT_ID" \
+  --arg name "$MODRINTH_VERSION_NAME" \
+  --arg version_number "$MODRINTH_VERSION" \
+  --arg version_type "$MODRINTH_VERSION_TYPE" \
+  --arg changelog "$MODRINTH_CHANGELOG" \
+  --argjson featured false \
+  --argjson dependencies "$MODRINTH_DEPENDENCIES_JSON" \
+  --argjson game_versions "$MODRINTH_GAME_VERSIONS_JSON" \
+  --argjson loaders "$MODRINTH_LOADERS_JSON" \
+  '{project_id: $project_id, name: $name, version_number: $version_number, version_type: $version_type, featured: $featured, changelog: $changelog, dependencies: $dependencies, game_versions: $game_versions, loaders: $loaders, file_parts: ["file"], primary_file: "file"}')
+
+CURL_ARGS=(
+  -X POST "https://api.modrinth.com/v2/version"
+  -H "Authorization: $MODRINTH_TOKEN"
+  -F "data=$MODRINTH_DATA;type=application/json"
+  -F "file=@$MODRINTH_FILE"
+)
+
+HTTP_RESPONSE=$(curl -sS -w $'\n%{http_code}' "${CURL_ARGS[@]}")
+HTTP_STATUS="${HTTP_RESPONSE##*$'\n'}"
+HTTP_BODY="${HTTP_RESPONSE%$'\n'*}"
+if [[ "$HTTP_STATUS" != 2?? ]]; then
+  echo "Error: Modrinth API returned HTTP $HTTP_STATUS:" >&2
+  if ! printf '%s\n' "$HTTP_BODY" | jq -r '.description // .error // .' >&2; then
+    printf '%s\n' "$HTTP_BODY" >&2
+  fi
+  exit 1
+fi
+printf '%s\n' "$HTTP_BODY" | jq .

tools/restore-server.sh

@@ -0,0 +1,107 @@
+#!/usr/bin/env bash
+# Restores a backup made by backup-server.sh into MINECRAFT_SERVER_PATH.
+# Each top-level item in the archive (plugins, config, worlds, settings) is
+# replaced; a "pre-restore" backup of the current state is taken first.
+#
+# Usage: restore-server.sh [-y|--yes] [--no-backup] [backup-file|name]
+#   Defaults to the newest backup in MINECRAFT_BACKUP_PATH.
+
+set -euo pipefail
+
+TOOLS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$TOOLS_DIR/.." && pwd)"
+if [[ ! -r "$PROJECT_ROOT/.env" ]]; then
+  echo "Error: $PROJECT_ROOT/.env is missing or unreadable. Copy .env.example to .env and set its values." >&2
+  exit 1
+fi
+load_project_env() {
+  local env_line env_key env_value first_char last_char
+  while IFS= read -r env_line || [[ -n "$env_line" ]]; do
+    env_line="${env_line%$'\r'}"
+    [[ "$env_line" =~ ^[[:space:]]*(#|$) ]] && continue
+    [[ "$env_line" == *=* ]] || continue
+
+    env_key="${env_line%%=*}"
+    env_value="${env_line#*=}"
+    env_key="${env_key#"${env_key%%[![:space:]]*}"}"
+    env_key="${env_key%"${env_key##*[![:space:]]}"}"
+    [[ "$env_key" =~ ^[A-Za-z_][A-Za-z0-9_]*$ ]] || continue
+    env_value="${env_value#"${env_value%%[![:space:]]*}"}"
+    env_value="${env_value%"${env_value##*[![:space:]]}"}"
+
+    if (( ${#env_value} >= 2 )); then
+      first_char="${env_value:0:1}"
+      last_char="${env_value:$((${#env_value} - 1)):1}"
+      if [[ "$first_char" == "$last_char" && ( "$first_char" == '"' || "$first_char" == "'" ) ]]; then
+        env_value="${env_value:1:$((${#env_value} - 2))}"
+      fi
+    fi
+
+    if [[ -z "${!env_key:-}" ]]; then
+      export "$env_key=$env_value"
+    fi
+  done < "$PROJECT_ROOT/.env"
+}
+load_project_env
+
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH:-MCServer}"
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH/#\~/$HOME}"
+[[ "$MINECRAFT_SERVER_PATH" == /* ]] || MINECRAFT_SERVER_PATH="$PROJECT_ROOT/$MINECRAFT_SERVER_PATH"
+MINECRAFT_BACKUP_PATH="${MINECRAFT_BACKUP_PATH:-backups}"
+MINECRAFT_BACKUP_PATH="${MINECRAFT_BACKUP_PATH/#\~/$HOME}"
+[[ "$MINECRAFT_BACKUP_PATH" == /* ]] || MINECRAFT_BACKUP_PATH="$PROJECT_ROOT/$MINECRAFT_BACKUP_PATH"
+
+ASSUME_YES=false
+SAFETY_BACKUP=true
+ARCHIVE=""
+for arg in "$@"; do
+  case "$arg" in
+    -y|--yes) ASSUME_YES=true ;;
+    --no-backup) SAFETY_BACKUP=false ;;
+    -h|--help) sed -n '2,8p' "$0"; exit 0 ;;
+    -*) echo "Unknown option: $arg" >&2; exit 1 ;;
+    *) ARCHIVE="$arg" ;;
+  esac
+done
+
+if [[ -z "$ARCHIVE" ]]; then
+  ARCHIVE=$(ls -t "$MINECRAFT_BACKUP_PATH"/backup-*.tar.bz2 2>/dev/null | head -n1 || true)
+  [[ -n "$ARCHIVE" ]] || { echo "Error: no backups found in $MINECRAFT_BACKUP_PATH." >&2; exit 1; }
+elif [[ ! -f "$ARCHIVE" && -f "$MINECRAFT_BACKUP_PATH/$ARCHIVE" ]]; then
+  ARCHIVE="$MINECRAFT_BACKUP_PATH/$ARCHIVE"
+fi
+[[ -f "$ARCHIVE" ]] || { echo "Error: backup not found: $ARCHIVE" >&2; exit 1; }
+ARCHIVE="$(cd "$(dirname "$ARCHIVE")" && pwd)/$(basename "$ARCHIVE")"
+
+if pgrep -f "java.*paper-.*\.jar" >/dev/null; then
+  echo "Error: the server is running. Stop it first (tools/stop-server.sh)." >&2
+  exit 1
+fi
+
+ENTRIES=$(tar -tjf "$ARCHIVE")
+if grep -qE '^/|(^|/)\.\.(/|$)' <<<"$ENTRIES"; then
+  echo "Error: archive contains absolute or '..' paths; refusing to restore." >&2
+  exit 1
+fi
+TOP_LEVEL=$(sed -E 's#^\./##; s#/.*##' <<<"$ENTRIES" | { grep -vE '^\.?$' || true; } | sort -u)
+[[ -n "$TOP_LEVEL" ]] || { echo "Error: backup is empty." >&2; exit 1; }
+
+echo "Restore $(basename "$ARCHIVE") into $MINECRAFT_SERVER_PATH"
+echo "These items will be replaced:"
+sed 's/^/  /' <<<"$TOP_LEVEL"
+if ! $ASSUME_YES; then
+  read -r -p "Continue? [y/N] " reply
+  [[ "$reply" =~ ^[Yy]$ ]] || { echo "Aborted."; exit 1; }
+fi
+
+mkdir -p "$MINECRAFT_SERVER_PATH"
+if $SAFETY_BACKUP && [[ -n "$(ls -A "$MINECRAFT_SERVER_PATH")" ]]; then
+  "$TOOLS_DIR/backup-server.sh" pre-restore
+fi
+
+while IFS= read -r item; do
+  rm -rf "${MINECRAFT_SERVER_PATH:?}/$item"
+done <<<"$TOP_LEVEL"
+
+tar -xjf "$ARCHIVE" -C "$MINECRAFT_SERVER_PATH"
+echo "Restored $(basename "$ARCHIVE")."

tools/start-server.sh

@@ -0,0 +1,131 @@
+#!/usr/bin/env bash
+# Downloads (if missing) and runs a Paper server via the Fill v3 API.
+# Server settings come from the project .env file.
+#
+# Env vars:
+#   JAVA_OPTS              Extra JVM args (default: -Xms2G -Xmx2G)
+
+set -euo pipefail
+
+TOOLS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$TOOLS_DIR/.." && pwd)"
+if [[ ! -r "$PROJECT_ROOT/.env" ]]; then
+  echo "Error: $PROJECT_ROOT/.env is missing or unreadable. Copy .env.example to .env and set its values." >&2
+  exit 1
+fi
+load_project_env() {
+  local env_line env_key env_value first_char last_char
+  while IFS= read -r env_line || [[ -n "$env_line" ]]; do
+    env_line="${env_line%$'\r'}"
+    [[ "$env_line" =~ ^[[:space:]]*(#|$) ]] && continue
+    [[ "$env_line" == *=* ]] || continue
+
+    env_key="${env_line%%=*}"
+    env_value="${env_line#*=}"
+    env_key="${env_key#"${env_key%%[![:space:]]*}"}"
+    env_key="${env_key%"${env_key##*[![:space:]]}"}"
+    [[ "$env_key" =~ ^[A-Za-z_][A-Za-z0-9_]*$ ]] || continue
+    env_value="${env_value#"${env_value%%[![:space:]]*}"}"
+    env_value="${env_value%"${env_value##*[![:space:]]}"}"
+
+    if (( ${#env_value} >= 2 )); then
+      first_char="${env_value:0:1}"
+      last_char="${env_value:$((${#env_value} - 1)):1}"
+      if [[ "$first_char" == "$last_char" && ( "$first_char" == '"' || "$first_char" == "'" ) ]]; then
+        env_value="${env_value:1:$((${#env_value} - 2))}"
+      fi
+    fi
+
+    if [[ -z "${!env_key:-}" ]]; then
+      export "$env_key=$env_value"
+    fi
+  done < "$PROJECT_ROOT/.env"
+}
+load_project_env
+
+PAPER_VERSION="${PAPER_VERSION:-}"
+PAPER_BUILD="${PAPER_BUILD:-}"
+MINECRAFT_SERVER_JAR="${MINECRAFT_SERVER_JAR:-}"
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH:-MCServer}"
+MINECRAFT_SERVER_PATH="${MINECRAFT_SERVER_PATH/#\~/$HOME}"
+[[ "$MINECRAFT_SERVER_PATH" == /* ]] || MINECRAFT_SERVER_PATH="$PROJECT_ROOT/$MINECRAFT_SERVER_PATH"
+
+[[ -n "$PAPER_VERSION" ]] || { echo "Error: PAPER_VERSION is not set (see .env)." >&2; exit 1; }
+
+PAPER_PROJECT="paper"
+JAVA_OPTS="${JAVA_OPTS:--Xms2G -Xmx2G}"
+FILL_API="https://fill.papermc.io/v3/projects/${PAPER_PROJECT}/versions/${PAPER_VERSION}"
+# Fill requires a non-generic User-Agent with contact info.
+USER_AGENT="${PAPER_USER_AGENT:-majinnaibu-plugin-dev/1.0 (https://github.com/majinnaibu)}"
+
+for cmd in curl jq java shasum; do
+  command -v "$cmd" >/dev/null || { echo "Error: '$cmd' is required." >&2; exit 1; }
+done
+
+api_get() {
+  curl -fsSL -H "User-Agent: $USER_AGENT" "$1"
+}
+
+mkdir -p "$MINECRAFT_SERVER_PATH"
+cd "$MINECRAFT_SERVER_PATH"
+
+JAR_BUILD="${MINECRAFT_SERVER_JAR:-}"
+JAR_BUILD="${JAR_BUILD#paper-"$PAPER_VERSION"-}"; JAR_BUILD="${JAR_BUILD%.jar}"
+if [[ -z "$PAPER_BUILD" && "$JAR_BUILD" =~ ^[0-9]+$ ]]; then
+  PAPER_BUILD="$JAR_BUILD"
+fi
+
+if [[ -z "$PAPER_BUILD" ]]; then
+  echo "Resolving latest stable build for Paper $PAPER_VERSION..."
+  PAPER_BUILD=$(api_get "$FILL_API/builds" \
+    | jq -r 'map(select(.channel == "STABLE")) | max_by(.id) | .id // empty') || true
+  if [[ -z "$PAPER_BUILD" ]]; then
+    # Offline or no stable build: fall back to the newest local jar for this version.
+    for f in paper-"$PAPER_VERSION"-*.jar; do
+      b="${f#paper-"$PAPER_VERSION"-}"; b="${b%.jar}"
+      [[ "$b" =~ ^[0-9]+$ ]] && (( b > ${PAPER_BUILD:-0} )) && PAPER_BUILD="$b"
+    done
+    [[ -n "$PAPER_BUILD" ]] || { echo "Error: no stable build found for $PAPER_VERSION." >&2; exit 1; }
+    echo "Could not resolve from API; using local build $PAPER_BUILD."
+  fi
+fi
+
+EXPECTED_JAR="paper-${PAPER_VERSION}-${PAPER_BUILD}.jar"
+if [[ -n "${MINECRAFT_SERVER_JAR:-}" && "$MINECRAFT_SERVER_JAR" != "$EXPECTED_JAR" ]]; then
+  echo "Error: MINECRAFT_SERVER_JAR=$MINECRAFT_SERVER_JAR does not match PAPER_VERSION/PAPER_BUILD ($EXPECTED_JAR)." >&2
+  exit 1
+fi
+MINECRAFT_SERVER_JAR="$EXPECTED_JAR"
+
+if [[ ! -f "$MINECRAFT_SERVER_JAR" ]]; then
+  echo "Downloading $MINECRAFT_SERVER_JAR..."
+  BUILD_JSON=$(api_get "$FILL_API/builds/$PAPER_BUILD")
+  DOWNLOAD_URL=$(jq -r '.downloads."server:default".url // empty' <<<"$BUILD_JSON")
+  EXPECTED_SHA=$(jq -r '.downloads."server:default".checksums.sha256 // empty' <<<"$BUILD_JSON")
+  [[ -n "$DOWNLOAD_URL" ]] || { echo "Error: no download for $PAPER_VERSION build $PAPER_BUILD." >&2; exit 1; }
+
+  TMP_JAR="$MINECRAFT_SERVER_JAR.part"
+  trap 'rm -f "$TMP_JAR"' EXIT
+  curl -fL --progress-bar -H "User-Agent: $USER_AGENT" -o "$TMP_JAR" "$DOWNLOAD_URL"
+
+  ACTUAL_SHA=$(shasum -a 256 "$TMP_JAR" | awk '{print $1}')
+  if [[ -n "$EXPECTED_SHA" && "$ACTUAL_SHA" != "$EXPECTED_SHA" ]]; then
+    echo "Error: checksum mismatch (expected $EXPECTED_SHA, got $ACTUAL_SHA)." >&2
+    exit 1
+  fi
+  mv "$TMP_JAR" "$MINECRAFT_SERVER_JAR"
+  trap - EXIT
+fi
+
+export MINECRAFT_SERVER_PATH MINECRAFT_SERVER_JAR
+
+"$TOOLS_DIR/stop-server.sh"
+
+if ! grep -qs '^eula=true' eula.txt; then
+  echo "Note: accept the EULA by setting eula=true in $MINECRAFT_SERVER_PATH/eula.txt (server will exit until then)."
+fi
+
+echo "Starting $MINECRAFT_SERVER_JAR in $MINECRAFT_SERVER_PATH..."
+# shellcheck disable=SC2086
+exec java $JAVA_OPTS -jar "$MINECRAFT_SERVER_JAR" --nogui
+

tools/stop-server.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# Stops any running Paper server (java process running a paper-*.jar).
+
+set -euo pipefail
+
+STOP_TIMEOUT="${STOP_TIMEOUT:-60}"
+
+SERVER_PIDS=$(pgrep -f "java.*paper-.*\.jar" || true)
+
+if [[ -z "$SERVER_PIDS" ]]; then
+  echo "Minecraft server is not running."
+  exit 0
+fi
+
+for pid in $SERVER_PIDS; do
+  echo "Stopping Minecraft server (PID: $pid)..."
+  # SIGTERM lets Paper run its shutdown hook and save worlds.
+  kill "$pid"
+done
+
+for ((i = 0; i < STOP_TIMEOUT; i++)); do
+  remaining=""
+  for pid in $SERVER_PIDS; do
+    kill -0 "$pid" 2>/dev/null && remaining="$remaining $pid"
+  done
+  if [[ -z "$remaining" ]]; then
+    echo "Minecraft server stopped."
+    exit 0
+  fi
+  sleep 1
+done
+
+echo "Server did not stop within ${STOP_TIMEOUT}s; forcing:$remaining"
+kill -9 $remaining