v0.5.0

You can take an ability away now. Roll, jump, either attack, guard — name it in locked_abilities
and the game simply will not do it, all run. It is not a keybind trick: the lock sits on the
character's own action layer, so rebinding does not dodge it, keyboard and mouse are covered the same
as a pad, and your menus are untouched. Lock roll and learn to space; lock jump and the world gets
taller; lock a hand and fight one-sided. Heal is lockable too — it owns no action bit, so locking it
disables the flask instead, and the flask heals nothing until it comes back.

And then you can give them back. Set ability_lock_mode: progressive and every locked ability starts
off but turns into an item somewhere in the multiworld — your Unlock: Roll might be behind a boss,
or in a friend's game three worlds over. Find it, get it back. By default those unlocks are
goal-required, exactly like a required Great Rune: your abilities can land in a partner's world, and
you cannot finish until they send them home. That mutual dependency is the point of playing in an
Archipelago — set ability_unlocks_required: false if you'd rather the unlocks never gate
completion. Roll is forced to show up early either way (thanks bobler), so you're never dodgeless
for hours.

What you need to update

• Client: Required — a progressive seed needs a client that understands ability unlocks, and the
  version handshake moves to 0.5.0. A 0.4.x client still plays a 0.4.x seed.
• APWorld: Required to generate 0.5.0 seeds.
• YAML: New YAML optional. Existing YAMLs remain valid. locked_abilities and
  ability_lock_mode are new and default off; every existing YAML stays valid.
• Existing seed/save: Compatible — a seed that sets neither option plays exactly as before.
• Profile/assets: No action.

What else is in it

• Co-op difficulty (#993) — coop_difficulty adds enemy-scaling tiers per seamless co-op
  partner, so a duo isn't facing half the threat. Off by default; needs enemy_scaling on.
• Remove merchant checks (#994) — shop_checks: false takes all ~562 merchant purchase slots
  out of the check pool. Merchants still sell their vanilla wares.
• Armor bundles are a YAML option (#986) — armor_bundles: false restores the classic pool
  where every helm, chest, gauntlet and greave is its own item.
• Leyndell's capital gate no longer fights itself (clients#409) — the reconciler was clearing
  the two fog-wall flags every tick while the key-item backstop re-set them, holding the wall shut
  with two Great Runes received. Fixed.
• Great Runes from boss drops arrive as-sent (clients#393) — the restored-row rewrite that
  could leave a received rune inert is gone.
• 129 more checks pay retroactively from the corpse-award sweep (#984) — death_award_pairs
  grows 179 → 308 pairs, and it works on existing seeds.
• !check <name> (#1008) — look up a check's flag by name and get a ready !setflag for
  anything that "didn't fire". GETTING-UNSTUCK grew matching walkthroughs (#1007).
• Two Dryleaf Dane sweeps re-keyed to the real defeat flags, 41 checks (#1015). Updater errors
  finally name the URL they tried (#978).

Notes

v0.5 was cut as an integration branch and merged to main on 08-24 once the ability-lock client
build checked out in play. stable stays on v0.4.13 until this window is tagged. CONTRACT_HASH
moved to 13db0b3a (the new abilityUnlockItems key); an older client reports incompatible for a
progressive seed rather than silently leaving abilities locked. Client half is 3797563 on client
main, pinned by the gitlink.