Phase 5: breeding with Cobbreeding, Ditto a rare Deep Dark find

Adrian (2026-10-31): add Cobbreeding without a gate; only Ditto should
be rare, in an endgame area or gated behind something else.

- Cobbreeding 2.4.1 (Modrinth only) and Cloth Config (client) in the
  pack; Cobblebase's hatchery takes Cobbreeding's eggs.
- Ditto moved from Button Isle to the Deep Dark with both of Cobblemon's
  entries (rare in slime chunks, ultra-rare elsewhere): zone_spawns.py
  pins take {"zone", "all_entries"}; Deep Dark target +1, Button Isle -1
  so no other line moved; Southwold and Frostpeak guardians pinned (they
  tie on base stats and flipped between runs).
- HMs' Trainer Ditto is made uncatchable; it still trades.
- check_deps.py skips other-side dependencies; Cobbreeding's harmless
  client-mixin log line allowlisted.
- Self-tests cobbreeding_eggs_fit_the_hatchery, trainer_ditto_cant_be_caught;
  docs, balance table, Phase 5 checklist.

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

docs/balance.md

@@ -17,17 +17,18 @@ Every tunable lives in a config file or in this table. **Placeholder** means gue
 | Fainted Pokémon auto-recovery | never (`defaultFaintTimer` 1e9 s) | Decided (permadeath) | `config/cobblemon/main.json` | |
 | Zone level bands | Button Isle 2–10, Southwold 8–18, Westmarch 15–25, Verdant Jungle 18–30, Highland Meadows 25–35, Mangrove Mire 25–38, Sunscorch 30–45, Frostpeak 40–55, Shallows 5–20, Deep Sea 30–50, Lush Caves 12–28, Dripstone 22–38, Deep Dark 45–60, Basalt Furnace 55–70 | Decided (Adrian, 2026-10-30) | `world/zones.json` → `levels`, then `tools/zone_layout.py` and `tools/zone_spawns.py` | Zone shapes approved (Adrian, 2026-10-29) |
 | Evolution lines per zone (targets) | 15–35 per zone, scaled to the 377 lines available | Decided (Adrian, 2026-10-30) | `world/zones.json` → `lines` | Result per zone in `docs/zone-species.md` |
-| Lines pinned to a zone | Durant, Torkoal, Heatmor → Basalt Furnace | Decided (Adrian, 2026-10-30) | `world/zones.json` → `species` | Basalt's own lines were all too big for its caves |
+| Lines pinned to a zone | Durant, Torkoal, Heatmor → Basalt Furnace; Ditto → Deep Dark, rare bucket in slime chunks and ultra-rare elsewhere (Placeholder; Adrian, 2026-10-31: rare, in an endgame area) | Decided (Adrian, 2026-10-30) | `world/zones.json` → `species` | Basalt's own lines were all too big for its caves. Ditto breeds with anything, so it's an endgame find; Deep Dark target 21 lines, Button Isle 19, so nothing else moved |
 | Comfortable temperature range | 0.25–1.51 (Cold Sweat units; Cold Sweat: 0.4–1.51) | Decided (Adrian, 2026-10-30) | `config/coldsweat/main.toml` | Keeps the lowlands' nights livable without gear |
 | Windswept hills temperature | 45–72 °F (Cold Sweat: 24–58 °F) | Decided (Adrian, 2026-10-30) | `config/coldsweat/world.toml` | They lie in the starter lowlands too |
 | Insulating armour | fur set (cold 10/14/12/10), hide set (heat 10/14/12/10), as Cold Sweat; leather armour none (Cold Sweat: 5/7/6/5 both) | Decided (Adrian, 2026-10-30) | `config/coldsweat/item.toml` | Frostpeak at noon: about 1 min bare, 14 min in fur; Sunscorch at noon: about 2 min bare, 25 min in hide |
 | Sewn-in insulation | goat fur 2 cold, hoglin hide 2 heat, wool 0.5 cold, leather 0.5/0.5 (Cold Sweat: wool 1.5, leather 1/1, rabbit hide 1.5 heat) | Decided (Adrian, 2026-10-30) | `config/coldsweat/item.toml` | |
 | Goat Fur / Hoglin Hide recipes | 8 wool + 1 Heat Rock → 8 Goat Fur; 8 leather + 1 Icy Rock → 8 Hoglin Hide (a set takes 24) | Decided (Adrian, 2026-10-30) | `kubejs/server_scripts/insulation.js` | Heat and Icy Rocks come from the guardians before Frostpeak and Sunscorch (archaeology finds too) |
 | Guardian respawn | 5 hours of game time after being beaten | Decided (Adrian, 2026-10-29) | `world/zones.json` → `guardian_respawn_hours` | Fixed spots |
-| Guardian strength | strongest Pokémon spawning in the zone, band top + 5 levels, 1.5× size, uncatchable | Decided (Adrian, 2026-10-30) | `tools/zone_spawns.py` (`GUARDIAN_*`), `world/zones.json` → `guardian.species` | |
+| Guardian strength | strongest Pokémon spawning in the zone, band top + 5 levels, 1.5× size, uncatchable | Decided (Adrian, 2026-10-30) | `tools/zone_spawns.py` (`GUARDIAN_*`), `world/zones.json` → `guardian.species` | Southwold (Pinsir) and Frostpeak (Tyranitar) are pinned: they tie on base stats with Hawlucha and Archaludon |
 | Guardian drops | Button Isle 10 Poké Balls + 4 Potions; Southwold 6 Great Balls + 4 Exp. Candy S; Westmarch and Jungle Mire Waders + 4 Pecha Berries + 2 Exp. Candy M; Mire and Highlands 3 Icy Rocks + 4 Super Potions; Sunscorch 3 Heat Rocks + 2 Exp. Candy L; Frostpeak and Deep Dark 3 Icy Rocks + 2 Exp. Candy L; Deep Sea Mystic Water + 3 Exp. Candy M | Decided (Adrian, 2026-10-30) | `world/zones.json` → `guardian.drops` | 3 rocks make one full fur or hide set |
 | Mire poison | Poison I for 7 s, renewed every 5 s while in the Mire without Mire Waders | Decided (Adrian, 2026-10-30) | `datapacks/core/data/cobblesurvival/zone_hazards/mire.json` | Vanilla Poison stops at half a heart |
 | Field moves (Cobblemon HMs) | mod defaults: all 39 abilities on, no level minimum, no fullness or friendship cost; Rock Smash breaks up to 32 connected ore blocks with no cooldown | Placeholder | `config/cobblemon_hms.json` (generated by the mod; the pack ships none yet) | Rock Smash mines any ore, whatever pickaxe the player has. HMs' `minLevel` is the player's XP level, not the Pokémon's |
+| Breeding (Cobbreeding) | mod defaults: an egg every 8,000–14,000 ticks per breeding pasture, hatch multiplier 1.0 (about 10 min for 20 egg cycles), Masuda shiny boost ×4, no random eggs from two Dittos, no gate | Placeholder | `config/cobbreeding/main.json` (written by the mod; the pack ships none) | Adrian, 2026-10-31: breeding without a gate |
 | Level pressure | full experience up to 5 levels above the zone's band, then 10 % less per level, at least 10 % (Exp. Candy and commands exempt) | Decided (Adrian, 2026-10-30) | `world/zones.json` → `level_pressure` | E.g. on Button Isle (up to Lv 10): Lv 15 full, Lv 20 half, Lv 24+ a tenth |
 | Strong flyer | ridable through the air with top speed ≥ 60 or top stamina ≥ 85 (Cobblemon ride stats) | Decided (Adrian, 2026-10-30) | `tools/zone_spawns.py` (`STRONG_FLYER_*`) | 29 species |
 | High zone for strong flyers | band starts at Lv 30 or more (Sunscorch, Frostpeak, Deep Sea, Deep Dark, Basalt Furnace) | Decided (Adrian, 2026-10-30) | `tools/zone_spawns.py` (`HIGH_ZONE_LEVEL`) | |