Phase 6: Pokémon machines (five cores, shells as data)

Adrian (2026-10-31): a Large Furnace where a Fire Pokémon heats real
furnaces (hoppers in and out), our own Electric generator, no upkeep;
then a drop synthesizer (FE into full drop rolls, looting tiers), a
sacrifice altar (level tiers, rare candies only from Lv 80) and a
rebirth chamber (Lv 100 -> shiny Lv 1 first stage, three perfect IVs,
moves kept, Ability Patch so the hidden ability is optional).

- machine/: data-driven 3x3x3 shells (window spots for glass, free
  spot under the core), checked in four rotations; the Pokémon walks in
  from the party and lives in the core; breaking core or shell sends it
  home (party, else PC, offline too); a real Cobblemon entity copy is
  shown in the chamber (no AI, invulnerable, uncatchable, never saved).
- Heat Core keeps vanilla furnaces lit and faster; Dynamo Core makes
  and pushes FE; Synthesis Core takes FE and rolls drops into a hopper-
  extractable buffer; Altar Core sacrifices on a confirmed sneak-use;
  Rebirth Core runs on server time.
- Recipes, casing tags, block loot, textures (tools/machine_assets.py),
  models, blockstates, names.
- Self-tests: in/out, refusal, shell and core breaks (PC when full),
  chunk unload, server restart, and each machine's work.
- Docs: design, balance table, Phase 6 checklist; Phase 5 approved.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/licenses.md

@@ -67,7 +67,7 @@ Licenses of mods planned for later phases are in `docs/addon-status.md` and move
 
 | Part | License |
 | --- | --- |
-| Companion mod (`mod/`) | MIT **(placeholder, see open decisions in `docs/design.md`)** |
+| Companion mod (`mod/`), including the machine cores' textures drawn by `tools/machine_assets.py` | MIT **(placeholder, see open decisions in `docs/design.md`)** |
 | Datapack, KubeJS scripts, configs, quests, tools | not chosen yet (same open decision) |
 
 Build tooling, not shipped in the pack: the companion mod's Gradle setup follows Cobblemon's official [NeoForge Kotlin MDK](https://gitlab.com/cable-mc/cobblemon-mdks); Gradle wrapper (Apache-2.0); [packwiz](https://github.com/packwiz/packwiz) and [packwiz-installer](https://github.com/packwiz/packwiz-installer) (MIT); [Chunky](https://modrinth.com/mod/chunky) by pop4959 (GPL-3.0), used only to pregenerate the world template.