Colossal Chests 2, Phase 7: Magnet wall

[rubensworks]

The Magnet wall, as its own PR (one feature per PR). It is independent of the Redstone wall PR (#225); whichever merges second needs a small merge of WallType, the lang file and the pickaxe tag, which I'll do.

Summary

• A functional wall that pulls dropped items around it into its chest, ticking on the server.
• Range: items within the radius of the wall, 8 blocks by default.
• Pulling: items move towards the wall, floating up to walls above them. They are inserted as soon as they touch the chest, on any face: an item pulled from the side lands against the chest's side, not on the wall.
• Inserting: the same automated insert as a hopper into the core, so a voiding slot destroys overflow like it would for a hopper.
• Left alone:
  • items with a pickup delay, such as ones a player just threw, so players can still drop items next to the chest; once the delay is over, they are pulled in;
  • items the chest can't take, so they don't pile up against the wall.
• Config (server, category magnet): magnetEnabled (default true) and magnetRadius (default 8, 1 to 32).
• No GUI, no item access for automation, mines with a pickaxe, shows its icon while sneaking like other functional walls.
• Placeholder textures (the Interface frame with a red and blue magnet) until Phase 9.

Design deviations

None. The design says "pulls items in a radius from that block. On by default; radius and toggle in config." The pickup delay and "only what fits" rules are my additions; tell me if you'd rather pull everything.

Validation

Acceptance criterion	Covered by
Items above the chest and to its side are pulled in; an item that can never be picked up stays; no item access	Game test testMagnetWallPullsItems
Items that don't fit are not pulled: they fall straight down and stay	Game test testMagnetWallLeavesWhatDoesNotFit

The side case was found by the first test: items pressed against another face of the chest got stuck until inserts happened on contact with the whole chest.

Totals: 290 unit tests; game tests Fabric 75, Forge 73, NeoForge 73, all passing.

In-game (clientdevbridge): script and screenshots in clientdevbridge-screenshots/phase7d-magnet. On NeoForge, an iron 3x3 with a Magnet wall on top:

• 64 cobblestone thrown with the drop key landed in front of the chest, then was pulled in after its pickup delay;
• an oak log broken 3 blocks away dropped into the chest;
• no item entities were left;
• the wall's icon while sneaking.

Not checked in-game on Fabric or Forge.

Known issues

• Cost: each Magnet wall looks for items in its radius every tick. That's cheap for a few walls, but many Magnet walls with a large radius add up.
• Coveralls: may drop slightly.

🤖 Generated with Claude Code

https://claude.ai/code/session_01RSz5r6eowhjNuANBjZE2v6

---

Generated by Claude Code