v18.3.13: /extendclaim fixes for subdivisions and shaped claims

GriefPrevention3D v18.3.13

Wiki: https://github.com/castledking/GriefPrevention3D/wiki

Overview

• /extendclaim on a 3D subdivision inside a shaped claim resized the shaped claim instead of the subdivision.
• Security: players without edit permission could resize someone else's shaped claim with /extendclaim.
• Shaped subdivisions no longer hit the "claim too narrow" / "insufficient area" minimums.

/extendclaim extended the wrong claim

When no claim was selected with the golden shovel, /extendclaim (and /claim expand) replaced the claim the player was standing in with its parent. Standing inside a 3D subdivision of a shaped claim therefore targeted the shaped claim, which grows whichever boundary segment the player faces. That edge could be far away, so the command looked like it just flashed and refreshed the visualization without extending anything — while quietly growing the parent claim.

Fix:

• /extendclaim now extends the most specific claim you're standing in — including 2D, 3D, and shaped subdivisions — matching upstream GriefPrevention. A claim selected with the golden shovel still takes priority.
• Extending a 3D subdivision vertically checked against the parent's raw stored Y values. Shaped claims store only their floor, so a 3D subdivision inside one could never grow upward. The check now uses the parent's real vertical range (the world height limit for 2D parents).
• Shaped subdivisions use the shaped segment expansion (the same as shaped claims) instead of the rectangle resize, which would have changed their stored bounds without moving their outline.

Behavior note: standing inside a rectangular subdivision, /extendclaim now grows that subdivision, not the claim around it. To grow the whole claim, stand outside the subdivision or select the claim's corner with the golden shovel first.

Security: shaped claims could be resized without permission

The shaped-claim branch of /extendclaim ran before the edit-permission check, so any player holding the claim modification tool could expand (or shrink, with a negative amount) another player's shaped claim just by standing in it. The permission check now runs first for every claim type.

Shaped subdivisions can be as small as you like

Shaped subdivisions carve up land the owner already paid for, so they now skip the claim size minimums (MinimumWidth / MinimumArea for rectangular outlines, ShapedMinimumArea for other outlines) both when created with /shapedsubdivideclaims and when reshaped or extended. Top-level claims are unaffected.

The smallest shaped subdivision is 2×2: a shaped outline can't be one block wide, because that would need a zero-length edge. Use a regular /subdivideclaims subdivision for 1×1 spaces.

Upgrade notes

No configuration or storage changes. Drop-in replacement for v18.3.12.