CoreViz 1.2.1 — Paper 26.1+ (26.1.x / 26.2.x / 26.3 Wilderness Bound)

GUI front-end for CoreProtect. Aggregates repeated container/block actions into clean net totals — e.g. +13 and +14 Iron Ingot from the same player/chest/hour become one +27 Iron Ingot line. Everything is an inventory GUI, no /co lookup spam.

Supported versions

Component	Version	Notes
Plugin	1.2.1	coreviz-1.2.1.jar
Minecraft (Java Edition)	26.1 – 26.3	26.1 (Apr 2026), 26.2, and 26.3 Wilderness Bound (2026-09-15) — same jar for all
Server	Paper 26.1+ ([26.1.build,))	api-version: '26.1' — loads on 26.1.x, 26.2.x, 26.3.x and newer. Will not load on 1.21.x and older. Works on forks that track Paper API 26.1+ (Purpur, etc.). No Fabric/Forge.
Java	25+ (build + runtime)	Minecraft 26.1+ requires Java 25. Compiled with <release>25</release>.
CoreProtect	23.1+ (API v11+)	Full behavior (blocks + containers + sessions) on 24.0+ (API v12+). On 23.x (API v11) blocks, sessions, and x-ray checks work; container history is skipped with a warning — CoreProtect only exposed container lookups from API v12 onward.

One jar for the whole 26.x line. plugin.yml declares api-version: '26.1' and pom.xml compiles against [26.1.build,) (forward-compatible).

What's new in 1.2.1

Patch release — CoreProtect backward compatibility. No config changes, no new permissions.

🔌 CoreProtect 23.x support (FIXED)

Previously the plugin refused to load its CoreProtect hook on servers running CoreProtect 23.x:

[CoreViz] CoreProtect API version 11 is too old. This plugin requires API version 12+ (CoreProtect 24.0+). Please update CoreProtect.

That no longer happens. The hook now accepts API v11+:

• Blocks, sessions, and /cpv check x-ray analysis work on CoreProtect 23.1+ — these use the long-standing performLookup() / sessionLookup() API paths, which are unchanged across versions.
• Container history still needs CoreProtect 24.0+ (API v12) — CoreProtect's own API layer cannot return container rows through the legacy lookup path, and the typed containerLookup() only exists from v12. On 23.x servers container results are skipped: one console warning on hook + a one-line in-game note (container history needs CoreProtect 24.0+ — showing blocks/sessions only) instead of silently missing rows.
• The v12-only calls are isolated so 23.x servers never touch the missing LookupOptions/ContainerResult classes — no NoClassDefFoundError, verified against the built jar.

To get container history on every server, update CoreProtect to 24.0+ there. Nothing to configure on the CoreViz side either way.

Dependencies

• Hard: CoreProtect 23.1+ on the server (24.0+ for container history).
• None else — no database, no extra libs.

Installation

1. Download coreviz-1.2.1.jar (mvn clean package → target/coreviz-1.2.1.jar if building from source)
2. Put it in plugins/ alongside CoreProtect.jar on a Paper 26.1+ server running Java 25+
3. Restart, join on a matching 26.1+ client, run /cpviz

Commands & Permissions

/cpviz [player]                          # menu-driven GUI (bare /cviz re-opens last results)
/cpviz u:<player> t:<time> r:<radius> a:<block|container|session> b:<item>  # typed lookup
/cpv check u:<player> a:mining [t:<time>] # x-ray check (overworld + nether)
/cpv see                                 # re-open last x-ray check
/cpviz clear                             # clear highlights
Aliases: /cpv, /coreviz, /cviz

• cpviz.use (default: op) — GUI / highlights
• cpviz.teleport (default: op) — Teleport button
• cpviz.check (default: op) — /cpv check / /cpv see

Typed flags: u:/user:, t:/time: (1h, 2d12h, ... omit = all time), r:/radius: (#global or number), a:/action: (block, container, session, mining), b:/block:/item: (one Material), h: (highlight).

Compatibility notes

• Not compatible with Paper 1.21.x and older — that's Paper's major version break at 26.1 (26.x.build.* scheme).
• Java 25 is mandatory on all 26.x.

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Built from net.thermedwolf:coreviz:1.2.1 — Paper API [26.1.build,) (api-version: '26.1') — CoreProtect 24.0 (compile) / 23.1+ (runtime floor)