Phase 5: soft gates instead of guardian flags, shoulder passives

Adrian (2026-10-31): HMs abilities stay open; the ones that get around
zone hazards get soft gates (materials or a high-level Pokemon, never
flags; gifted Pokemon and materials count the same); party passives from
shoulder Pokemon; Cobblebase skills and the Power Block move to soft
gates too.

- Gates: a zone gate passes at the top of the zone's band or while the
  Pokemon holds the zone's material (or a harder zone's). Cobblebase
  skills check the pastured Pokemon and tell the owner once what it needs.
- Progress record, guardian unlock messages, the Power Block placement
  gate and /cobblesurvival progress removed; the Power Block's recipe
  already needs Jungle redstone.
- HmsGate: switches off gated HMs auras (Flash, Dive, Mist, Rock Climb,
  Magnet Rise, Lucky Chant, Lava Plume) whose Pokemon doesn't pass.
- ShoulderPassives: type-based effects from shoulder Pokemon, hazard
  ones (warmth, frigidness, water breathing, night vision) gated.
- Self-tests for all of it; docs, balance table, Phase 5 checklist.

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

docs/balance.md

@@ -38,8 +38,11 @@ Every tunable lives in a config file or in this table. **Placeholder** means gue
 | Regenerators breakable by players | no; explosions don't hurt veins | Fine for now (Adrian, 2026-10-30) | `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) | Fine for now (Adrian, 2026-10-30) | `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 % | Fine for now (Adrian, 2026-10-30) | `datapacks/core/data/cobblesurvival/species_additions/` | Every drop and what consumes it: `docs/pokemon-drops.md` (`tools/drop_audit.py`) |
-| Cobblebase skill gates | start: gatherer, harvester, irrigator, producer, furnace fuel, water fill, extinguisher, scout, guard; Button Isle: fishing, forager, botanist, collector, snow fill, brewing fuel, craftsman; Southwold: pharmacist, scholar, mentor (passive XP), lava fill; Westmarch: mining, excavator, architect, armorer, diving; Verdant Jungle: alchemist, trainer, smith, prospector, growth aura; Highland Meadows: speed, jump, haste, night vision, water breathing, saturation buffs; Mangrove Mire: resistance, strength buffs; Sunscorch: friend recruiter, aura boost; Frostpeak: healer, lucky charm; Deep Dark: breeder, egg hatcher | Placeholder | `datapacks/core/data/cobblesurvival/progression_gates/base.json` | A zone means "after beating its Alpha guardian" |
-| Power Block gate | after the Verdant Jungle guardian | Placeholder | same file, `blocks` | Recipe: Poke Power's own (iron blocks, redstone blocks, Electirizer) |
+| Cobblebase skill gates | start: gatherer, harvester, irrigator, producer, furnace fuel, water fill, extinguisher, scout, guard; Button Isle: fishing, forager, botanist, collector, snow fill, brewing fuel, craftsman; Southwold: pharmacist, scholar, mentor (passive XP), lava fill; Westmarch: mining, excavator, architect, armorer, diving; Verdant Jungle: alchemist, trainer, smith, prospector, growth aura; Highland Meadows: speed, jump, haste, night vision, water breathing, saturation buffs; Mangrove Mire: resistance, strength buffs; Sunscorch: friend recruiter, aura boost; Frostpeak: healer, lucky charm; Deep Dark: breeder, egg hatcher | Placeholder | `datapacks/core/data/cobblesurvival/progression_gates/base.json` → `cobblebase_skills` | A zone means its soft gate, checked on the pastured Pokémon (see "Soft gate levels and materials") |
+| Power Block gate | none of its own: Poke Power's recipe takes 4 redstone blocks (Verdant Jungle ore), 4 iron blocks and an Electirizer | Placeholder | Poke Power's recipe | The Phase 4 guardian flag is gone (Adrian, 2026-10-31) |
+| Soft gate levels and materials | a Pokémon passes a zone's gate at the top of its band (Button Isle 10, Southwold 18, Lush Caves 28, Westmarch 25, Jungle 30, Highlands 35, Mire 38, Dripstone 38, Sunscorch 45, Deep Sea 50, Frostpeak 55, Deep Dark 60, Basalt 70), or holding a material: coal; raw copper/copper ingot; shiny stone; raw iron/iron ingot/thunder stone; redstone/leaf stone; lapis/sun stone; water stone; amethyst shard/moon stone; raw gold/gold ingot/fire stone/Heat Rock; Mystic Water; emerald/ice stone/dawn stone; diamond/dusk stone; quartz/netherite scrap. A harder zone's material counts too | Placeholder | `progression_gates/base.json` → `zones` (an optional `level` overrides the band top) | Adrian, 2026-10-31: soft gates, no flags |
+| Gated field moves (Cobblemon HMs auras) | Flash: Dripstone; Dive, Mist: Mire; Rock Climb: Highlands; Magnet Rise: Sunscorch; Lucky Chant: Frostpeak; Lava Plume: Deep Dark | Placeholder | `progression_gates/base.json` → `field_moves` | Checked on the Pokémon giving the aura |
+| Shoulder passives | Flying slow falling, Electric speed, Rock/Ground/Steel haste; gated: Fire warmth (Highlands), Ice frigidness (Jungle), Water water breathing (Mire), Ghost/Dark night vision (Dripstone); all level I | Placeholder | `datapacks/core/data/cobblesurvival/shoulder_passives/base.json` | Warmth and frigidness are Cold Sweat's effects |
 | Poke Power output | 50 FE/t per Pokémon level, block stores 120,000 FE, 16,000 FE/t out; cable 32,000 / 16,000 | The mod's defaults | `pack/config/poke_power/server.toml` | Nothing uses the energy before Phase 6 |
 | Cobblebase jobs | the mod's defaults (finder cooldown 240 s, passive XP 5 % a minute with a Mentor, recruiter rates, buffs) | The mod's defaults | `pack/config/cobblebase.json` (skill cooldowns in its own skill data) | Tune after play-testing |
 | Catch rate against stronger Pokémon | full up to the trainer's strongest party level, then falling linearly to 2 % of the normal rate at +20 levels and beyond | Placeholder (Adrian, 2026-10-30: 20+ levels higher very improbable) | `datapacks/core/data/cobblesurvival/catching/rules.json` → `catch_rate` | E.g. +10 levels: about half the normal rate |