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/checklists/phase-5.md

@@ -4,20 +4,30 @@
 
 **2026-10-31:** the field moves come from Cobblemon HMs instead of our own system. Mining ore is the one hard requirement, the other moves are nice to have. Furnaces are lit by putting a Pokémon inside a Phase 6 machine, not by a field move. Details: `docs/design.md` → "Phase 5: field moves from Cobblemon HMs".
 
+**Answers (2026-10-31):** (1) HMs' abilities stay open from the start; (2) the ones that get around zone hazards get soft gates: materials (also from guardians) or a high-level Pokémon, never flags, and a gifted Pokémon or material counts the same; (3) party passives come from shoulder Pokémon. Follow-up: Cobblebase's skills and the Power Block move from guardian flags to soft gates too.
+
 ## Built so far
 
 - **Cobblemon HMs** 4.1.0 is in the pack with its default config (39 abilities, all on).
 - **Rock Smash mines the island's ore:** the ore drops, and mined vein blocks turn into regenerators that grow back. Automated: `rock_smash_mines_veins`.
 - **HMs' Trainer Ditto** (a visiting TM seller that is a wild Ditto underneath) neither hunts weak trainers nor despawns as a stray.
+- **Soft gates** replace the guardian flags. A gate names a zone; the Pokémon doing the work passes it at the top of that zone's level band, or while holding one of its materials (or a harder zone's). Table in `docs/balance.md`.
+  - Cobblebase skills: checked on the pastured Pokémon; its owner is told once what it needs. Automated: `cobblebase_skills_need_level_or_material`.
+  - Power Block: no gate of its own, its recipe takes the Jungle's redstone blocks. Automated: `power_block_gated_by_its_recipe`.
+  - HMs auras that get around hazards (Flash, Dive, Mist, Rock Climb, Magnet Rise, Lucky Chant, Lava Plume): switched off, with a message, while the Pokémon giving them doesn't pass. Automated: `hazard_auras_need_level_or_material`.
+- **Shoulder passives:** a shoulder Pokémon gives an effect by type (Flying slow falling, Electric speed, Rock/Ground/Steel haste; gated: Fire warmth, Ice frigidness, Water water breathing, Ghost/Dark night vision). Automated: `shoulder_pokemon_give_passives`.
 
 ## In game (Prism instance)
 
 - [ ] Send out a Pokémon that knows Rock Smash, pick Rock Smash on its interaction wheel, and punch an ore node: the node breaks in one go, drops its ore and turns into a regenerator.
 - [ ] Do the same on an underground vein that needs a better pickaxe than the one you hold (e.g. iron in Westmarch with no pickaxe): it still breaks.
-- [ ] Look at the other abilities your Pokémon offer on the wheel (Cut, Flash, Strength, Surf boosts, ...) and note any you want switched off or tuned.
+- [ ] Switch on Flash from a low-level Pokémon: it switches off again with a message saying what it needs. Give it an amethyst shard to hold (or a diamond), switch it on again: it stays on.
+- [ ] Put a Pokémon below Lv 25 with the Mining skill in a pasture: you get a message that it needs Lv 25 or Westmarch ore. Give it an iron ingot to hold: it starts mining.
+- [ ] Craft and place a Power Block in survival: no guardian needed.
+- [ ] Put Pidgey (or another Flying type) on your shoulder: slow falling. A low-level Fire type on your shoulder: a message about warmth; with a sun stone or lapis held, Cold Sweat's warmth shows.
+- [ ] Look at the other abilities your Pokémon offer on the wheel (Cut, Strength, Surf boosts, ...) and note any you want switched off or tuned.
 
-## Ask Adrian: Phase 5 decisions
+## Ask Adrian
 
-1. **Progression.** HMs' abilities all work from the start. Should some wait for guardians like Cobblebase's skills (Rock Smash after an early one, so tiers still matter at first)? HMs' own `minLevel` is the *player's* XP level, which the island doesn't use otherwise.
-2. **Zone hazards.** Some abilities get around them: Flash (night vision, lights up the Deep Dark), Lava Plume (fire immunity and walking on lava in the Basalt Furnace), Magnet Rise (flying), Lucky Chant (more ore). Leave them on, switch them off, or gate them behind the zone's guardian?
-3. **Party passives.** The roadmap's other half (e.g. Haste with a Rock type, warmth from a Fire type in Frostpeak; your idea of effects from shoulder Pokémon). Still wanted on top of HMs' auras?
+- The gate levels, materials and which aura sits behind which zone are placeholders (`docs/balance.md`). Dive, Mist and Rock Climb were added to your four because they get around hazards the same way; say if any should stay open.
+- Phase 5's roadmap done-when asked for fire with `doFireTick`; there's no fire move any more (furnaces are Phase 6). Approve Phase 5 as it is?