Phase 4: veins in every chunk, drops for the mobs the island lacks

Ore veins: make_world.py loads the island again row by row until
Regenerating Ore Veins has filled every chunk (/cobblesurvival veins
unfilled), cave tiers sit at their biome's depths, small zones get denser
veins, showcase veins are full size. The world report checks surface
tiers against the zone grid, cave tiers within two biome cells of their
cave, and fails on unfilled chunks; the template passes (37,689 chunks).

Drops: tools/drop_audit.py checks every creature drop a recipe or brewing
needs (docs/pokemon-drops.md). Blaze rods, ghast tears, breeze rods,
shulker shells and nether stars now drop from Pokemon through species
additions (self-test drop_additions_apply). The field guide counts vanilla
mobs as absent, applies species additions and reads the veins as sources.

Cobblebase tried (loads, self-tests pass) and left out until Adrian
decides its scope. Phase 4 checklist with the open questions.

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

docs/balance.md

@@ -30,6 +30,12 @@ Every tunable lives in a config file or in this table. **Placeholder** means gue
 | 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`) | |
+| Ore tiers per zone | Button Isle: coal; Southwold: copper; Westmarch: iron, thunder stone; Verdant Jungle: redstone, leaf stone; Highland Meadows: lapis, sun stone; Sunscorch: gold, fire stone; Frostpeak Range: emerald, ice stone, dawn stone; Dripstone Depths: amethyst, moon stone; Deep Dark: diamond, dusk stone; Basalt Furnace: quartz, netherite; Lush Caves: shiny stone; Mangrove Mire: water stone | Placeholder | `world/zones.json` → `ores` → `tools/zone_ores.py` | Each tier in exactly one zone; evolution stones are tiers (their natural ores are off) |
+| Vein regrowth | 20 min: coal; 30 min: copper; 40 min: iron; 45 min: redstone, lapis; 60 min: gold, quartz, thunder stone, shiny stone, leaf stone, water stone, moon stone, sun stone, fire stone, ice stone; 75 min: emerald, dawn stone, dusk stone; 90 min: diamond; 120 min: amethyst; 180 min: netherite; ±10 % jitter; real time | Placeholder | `world/zones.json` → `ores` (`regen_minutes`, `ore_defaults.jitter`) | Counts while the server is off too |
+| Vein spacing, size, tries | spacing 4–14 chunks between candidate chunks, radius 0–2, 70 % filled, 1–4 tries per candidate chunk (per tier in `world/zones.json`) | Placeholder | `world/zones.json` → `ores`, `ore_defaults` | Ore blocks in the template (2026-10-30): copper 10,400, iron 6,356, quartz 2,397, lapis 2,236, coal 2,222, redstone 1,044, gold 815, diamond 559, shiny stone 466, thunder stone 239, sun stone 238, amethyst 238, dusk stone 222, emerald 181, leaf stone 125, ice stone 102, moon stone 100, fire stone 98, water stone 95, netherite 74, dawn stone 64. Per zone in `build/island-report.json` after `tools/make_world.py` |
+| Regenerators breakable by players | no; explosions don't hurt veins | Placeholder | `tools/zone_ores.py` → `global.json` | Otherwise a player could remove a vein for good |
+| Vein Locator | compass + copper ingot; 75 % chance to break per use (the mod's default) | Placeholder | `tools/zone_ores.py` → `vein_locator.json` | The mod's default recipe needs netherite |
+| Drops for mobs the island lacks | Blaze Rod: Carkol 10 %, Torkoal 25 % ×1–2; Ghast Tear: Drifloon 5 %, Dusclops 10 %; Breeze Rod: Whimsicott 10 %; Shulker Shell: Shuckle 10 %, Cloyster 10 %; Nether Star: Charizard 5 % | Placeholder | `datapacks/core/data/cobblesurvival/species_additions/` | Every drop and what consumes it: `docs/pokemon-drops.md` (`tools/drop_audit.py`) |
 | Ride stats (speed, stamina, ...) | Cobblemon's own | To tune after play-testing | species `riding` via `species_additions` | |
 | Healing while sleeping | off (`healPercent` 0) | Decided (roadmap) | `config/cobblemon/main.json` | |
 | Loot container refresh | 1 hour (72,000 ticks of game time) after first opened, all containers | Decided (Adrian, 2026-10-29) | `config/lootr-common.toml` | Tiering by structure/biome later |
@@ -39,4 +45,4 @@ Every tunable lives in a config file or in this table. **Placeholder** means gue
 | Server heap for smoke test | 4 GB | Tooling | `tools/smoke_test.py` | Not a gameplay value |
 | Dev client heap (Prism) | 6 GB | Tooling | `tools/prism_instance.py --memory` | Not a gameplay value |
 
-Sections to fill as phases land: zone level bands (Phase 3), drop rates and drop → consumer list (Phase 4), vein regeneration timers (Phase 4), pasture job cooldowns (Phase 4), hazard damage (Phase 3), field-move cooldowns and caps (Phase 5), machine output (Phase 6), boss attack damage and telegraph times (Phase 7).
+Sections to fill as phases land: pasture job cooldowns (Phase 4), hazard damage (Phase 3), field-move cooldowns and caps (Phase 5), machine output (Phase 6), boss attack damage and telegraph times (Phase 7).