Big, tough bosses; working machines show it; JEI drop pages on the roadmap

Bosses (Adrian, 2026-11-02: Eternatus too small and too easy; guardians way
bigger and tougher; only defensive stats up; no attack takes more than 25 %):
- Guardians scale to about 8 blocks tall (1.5x-12x), Eternatus to 15 blocks
  (2.5x, was 0.2x). Cave guardians look for a spot with room above them.
  Bosses already in a world grow on the next check outside battle.
- Perfect IVs and 170 EVs each in HP, Defense and Sp. Def, nothing offensive.
- The Guardian's Ward, a Showdown-only held item (held_items/guardiansward.js)
  handed to every boss by a HeldItemProvider: Defense and Sp. Def x2 while
  defending, and one attack (all hits together) takes at most 25 % of max HP.
- Area attacks that start at the boss reach half its width further.

Machines (Adrian, 2026-11-02): a working core is active: it glows, its front
animates (flickering fire on the furnace core, pulsing emblems elsewhere), and
particles show in the chamber and at the core (client side). The Pokemon
inside flinches about every 15 s (red flash, Cobblemon's hit sound, no damage).

Roadmap Phase 8: every item that can drop gets a JEI page naming its sources.

Self-tests: practice_bosses_spawn checks size and training,
boss_takes_a_quarter_per_attack runs a real battle (each Lv 100 Bullet Seed
takes exactly a quarter), heat_core_cooks_with_hoppers checks the active state
and the flinch. Self-tests and the island check pass.

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

docs/design.md

@@ -261,6 +261,8 @@ Adrian's choices: the Large Furnace has a Fire Pokémon heat real furnaces, and
 
 Self-tests (`MachineTests`): in and out, wrong Pokémon refused, broken shell and broken core (to the PC when the party is full), chunk unload, server restart, and each machine's work (a furnace fed and emptied by hoppers without fuel, a Poke Power cable charged by a Dynamo Core, Magikarp's salmon through a hopper under a gold Synthesis Core, a confirmed sacrifice with a Lv 100 Dragonite's rewards, a rebirth from Charizard to a shiny Lv 1 Charmander with its moves and ability).
 
+**A working machine shows it** (Adrian, 2026-11-02: particles around the Pokémon and an animated core, like the fire in a furnace; the Pokémon should now and then look as if it takes a hit). While its machine works, the core's block state is `active`: the core gives off light, its front switches to an animated face (the furnace's flame flickers; the other emblems pulse with sparks rising; `tools/machine_assets.py`), and particles show (`MachineEffects`, client side): flames around a Fire Pokémon and at the furnace core's front with smoke and the furnace crackle; electric sparks in the generator; enchanting glyphs flowing into the Pokémon in the synthesizer; souls and soul fire at the altar; end rods and glyphs in the rebirth chamber. It stays active two seconds after the work stops, so it doesn't flicker. About every 15 seconds of work the Pokémon inside flinches: it flashes red and Cobblemon's hit sound plays, but nothing is hurt (`MachineDisplay.flinch`). Working means: a heated furnace has something to cook, the generator isn't full, the synthesizer gets energy, a rebirth runs, the altar holds a Pokémon. Self-test: `heat_core_cooks_with_hoppers` also checks that the core turns active while cooking and back afterwards, and that a flinch leaves the Pokémon unharmed.
+
 **Generator.** The Dynamo Core stores Forge Energy and pushes it to whatever touches the core and takes energy (cables, machines from other mods); its output per tick depends on the Pokémon's level and Special Attack, in line with Poke Power's 50 FE per level.
 
 ## Phase 7: boss battles with area attacks (Adrian, 2026-11-02)
@@ -274,7 +276,7 @@ Adrian's choices: every zone guardian gets area attacks (more and harder in hard
 | Highland Meadows | Cinderace | **Mudsdale** | a draft horse of highland pastures, not a starter |
 | Sunscorch | Delphox | **Flygon** | the desert spirit of sandstorms |
 | Frostpeak Range | Tyranitar | **Abomasnow** | lives on snowy mountains; spawns there |
-| Deep Dark | Crobat | **Regigigas** (normal size) | a legendary; the ancient colossus sleeping in ruins, like the Ancient Cities |
+| Deep Dark | Crobat | **Regigigas** | a legendary; the ancient colossus sleeping in ruins, like the Ancient Cities |
 | Basalt Furnace | none | **Moltres** (Lv 75) | the flame bird of the volcano; stands in for Groudon |
 | The End | Ender Dragon | **Eternatus** | the cosmic final boss; stands in for Giratina |
 
@@ -288,7 +290,9 @@ The others fit and stay: Morpeko (Button Isle), Pinsir (Southwold), Scyther (Wes
 
 Self-tests (`BossTests`): every guardian has a fight and a Cobblemon model; each attack shape hits a player standing in it and misses one ten blocks away; attacks stop when the battle ends; leaving the arena ends the battle and the boss heals; the dragon can't join the End, Eternatus appears, and beating it opens the exit portal with the egg.
 
-**Eternatus** replaces the Ender Dragon: the dragon no longer spawns; Eternatus (uncatchable, Lv 80, scaled down to fit) appears on the main End island while a player is there, and beating it does what killing the dragon did (exit portal, gateways, the egg on the first win). Only one at a time: it waits until the entities around its spot have loaded before deciding it's missing, and a second copy never joins while the recorded one is alive (Adrian met a second Eternatus on his second visit, 2026-11-02); extra copies left in older worlds are removed.
+**Eternatus** replaces the Ender Dragon: the dragon no longer spawns; Eternatus (uncatchable, Lv 80, 15 blocks tall) appears on the main End island while a player is there, and beating it does what killing the dragon did (exit portal, gateways, the egg on the first win). Only one at a time: it waits until the entities around its spot have loaded before deciding it's missing, and a second copy never joins while the recorded one is alive (Adrian met a second Eternatus on his second visit, 2026-11-02); extra copies left in older worlds are removed.
+
+**Bosses are big and tough, not strong** (Adrian, 2026-11-02: Eternatus was too small and too easy; guardians should be way bigger and tougher; only defensive stats go up, never Attack or Speed; no single attack may take more than a quarter of a boss's HP). Every boss (guardian, End boss, practice copy) is scaled to stand about 8 blocks tall (Eternatus 15; `tools/zone_spawns.py`, `tools/zone_bosses.py`) and gets perfect IVs and 170 EVs each in HP, Defense and Sp. Def, nothing offensive (`BossToughness`). In battle it brings the **Guardian's Ward**, a held item that exists only inside Cobblemon's battle engine (Showdown): Cobblemon loads it from `datapacks/core/data/cobblesurvival/held_items/guardiansward.js`, and the companion mod hands it to every boss ahead of whatever it holds, so it can't be stolen, knocked off or suppressed. It starts a lasting condition that doubles Defense and Sp. Def while the boss defends (not for Body Press) and caps one attack, all hits of a multi-hit move together, at a quarter of the boss's max HP. Guardians and an Eternatus already standing in a world grow and get their training on the next check outside battle; a cave guardian moves to a spot it fits in. Area attacks that start at the boss (rings, lines, cones) reach half its width further, so a big boss's ring starts at its edge. Self-tests: `practice_bosses_spawn` (size, training, full health) and `boss_takes_a_quarter_per_attack` (a real battle: a Lv 100 Garchomp's Bullet Seed, every hit enough to knock out the Lv 15 boss, takes exactly a quarter per use).
 
 **The End has Pokémon** (Adrian, 2026-11-02: it looked barren). The End is a zone of its own, "The End", Lv 50–70 (`world/zones.json` → `dimensions`; `Zones.at` returns it anywhere in the End). Every line Cobblemon spawns in End biomes spawns there too, on top of its home on the island: Beheeyem, Reuniclus and Metagross anywhere; Gothitelle and Sigilyph in End cities; Malamar and Unown with a Poké Snack. Gothita had no island home (it only spawns in the End), so it's new. Cobblemon has all of these uncommon or rare, and it rolls the bucket before the Pokémon, so in the End they move to the common bucket or the End would stay nearly empty; each line weighs the same, Metagross a fifth. Being a zone, the End also has level pressure (full experience up to Lv 75, like the Basalt Furnace) and the wild-Pokémon cleanup above Lv 80; Eternatus is exempt as an uncatchable boss. Self-test `end_has_spawns`.