NeoOrigins 2.0 Migration Guide

Reference for pack authors updating JSON from pre-2.0 types to the 2.0 generic / composable types.

What changed

Pre-2.0 NeoOrigins had 88 hardcoded PowerType classes — one per behaviour. 2.0 collapses these into ~25 generic types that compose via DSL (condition + action + event).

For existing packs: nothing to change. Legacy type IDs still work via the alias table. On first load of a legacy type, the log prints a one-time [2.0-legacy] power type '<old>' is deprecated — remap to '<new>' warning so you know where to migrate when you next touch the pack.

For new / updated packs: author against the 2.0 generic types directly. They’re more expressive, cheaper to maintain, and won’t be deprecated in 3.0.

The source of truth for every alias is src/main/java/com/cyberday1/neoorigins/power/registry/LegacyPowerTypeAliases.java. Each register(old, new, remap) call below corresponds to a row here; if this document drifts from the code, the code wins.

The deprecation log line

Every aliased legacy type emits exactly one warning per boot:

[2.0-legacy] power type 'neoorigins:thorns_aura' is deprecated — remap to 'neoorigins:action_on_event' (first seen on power 'examplepack:spiky_skin')

Grep your logs for [2.0-legacy] to get the migration punch list. Deprecated types will be removed no earlier than NeoOrigins 4.0 — you have time.

Aliases fire only once the legacy Java class is physically deleted. While the legacy class still exists in the registry (see the // <type> retired in 2.0 comments in PowerTypes.java), the alias is dormant and the legacy behaviour keeps running. This lets us stage the collapse without breaking in-flight packs.

Collapse table

Grouped by target generic type. Each row reflects the actual remap lambda in LegacyPowerTypeAliases.java — the “After” column shows exactly what the JSON is rewritten to before PowerTypes.get(...) dispatches to the generic type.

→ neoorigins:action_on_event

Fourteen legacy types collapse into this single event-listener.

neoorigins:action_on_kill

Before:

{
  "type": "neoorigins:action_on_kill",
  "action": "restore_health",
  "amount": 4.0
}

After:

{
  "type": "neoorigins:action_on_event",
  "event": "kill",
  "entity_action": { "type": "neoorigins:heal", "amount": 4.0 }
}

action also accepts "restore_hunger" (→ neoorigins:feed { food: <amount> }) and "grant_effect" (→ neoorigins:apply_effect { effect, duration, amplifier }).

neoorigins:action_on_hit_taken

Before:

{
  "type": "neoorigins:action_on_hit_taken",
  "action": "teleport",
  "chance": 0.5,
  "min_damage": 2.0
}

After (chance + min_damage compose neoorigins:chance + neoorigins:if_else):

{
  "type": "neoorigins:action_on_event",
  "event": "hit_taken",
  "entity_action": {
    "type": "neoorigins:if_else",
    "condition": {
      "type": "neoorigins:hit_taken_amount",
      "comparison": ">=",
      "compare_to": 2.0
    },
    "if_action": {
      "type": "neoorigins:chance",
      "chance": 0.5,
      "action": {
        "type": "neoorigins:random_teleport",
        "horizontal_range": 16.0,
        "vertical_range": 8.0
      }
    }
  }
}

action also accepts "ignite_attacker" (→ neoorigins:ignite_attacker { ticks }) and "effect_on_attacker" (→ neoorigins:effect_on_attacker { effect, duration, amplifier }).

neoorigins:thorns_aura

Before:

{ "type": "neoorigins:thorns_aura", "return_ratio": 0.25 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "hit_taken",
  "entity_action": {
    "type": "neoorigins:damage_attacker",
    "amount_ratio": 0.25,
    "source": { "name": "magic" }
  }
}

neoorigins:food_restriction

Both modes now use the same outer shape — an action_on_event listening on food_eaten, dispatching an if_else whose condition checks the food being eaten. Cancelling the event blocks the bite.

Blacklist — “these foods are forbidden”:

{
  "type": "neoorigins:food_restriction",
  "mode": "blacklist",
  "item_tag": "minecraft:fishes"
}

becomes

{
  "type": "neoorigins:action_on_event",
  "event": "food_eaten",
  "entity_action": {
    "type": "neoorigins:if_else",
    "condition": {
      "type": "neoorigins:food_item_in_tag",
      "tag": "minecraft:fishes"
    },
    "if_action":   { "type": "neoorigins:cancel_event" },
    "else_action": { "type": "neoorigins:nothing" }
  }
}

Reads: “if the food is in minecraft:fishes, cancel; otherwise allow.”

Whitelist — “only these foods are allowed”:

{
  "type": "neoorigins:food_restriction",
  "mode": "whitelist",
  "item_tag": "yourpack:edible_for_me"
}

becomes

{
  "type": "neoorigins:action_on_event",
  "event": "food_eaten",
  "entity_action": {
    "type": "neoorigins:if_else",
    "condition": {
      "type": "neoorigins:food_item_in_tag",
      "tag": "yourpack:edible_for_me"
    },
    "if_action":   { "type": "neoorigins:nothing" },
    "else_action": { "type": "neoorigins:cancel_event" }
  }
}

Reads: “if the food is in yourpack:edible_for_me, allow; otherwise cancel.”

Notice the only thing that changed between blacklist and whitelist is the branch placement — cancel_event moved from if_action to else_action. You can also keep the same branch placement and instead wrap the condition in neoorigins:not — same outcome, different phrasing:

"entity_action": {
  "type": "neoorigins:if_else",
  "condition": {
    "type": "neoorigins:not",
    "condition": {
      "type": "neoorigins:food_item_in_tag",
      "tag": "yourpack:edible_for_me"
    }
  },
  "if_action":   { "type": "neoorigins:cancel_event" },
  "else_action": { "type": "neoorigins:nothing" }
}

⚠️ Common mistake: neoorigins:not is a condition type, not an action type. It wraps a condition; it does not replace if_else. If your power’s entity_action.type is neoorigins:not, the parser doesn’t know what to do with it and the whole power silently no-ops. Always keep if_else (or another action type) at the outer level.

neoorigins:hunger_drain_modifier

Before:

{ "type": "neoorigins:hunger_drain_modifier", "multiplier": 1.3 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_exhaustion",
  "modifier": { "operation": "multiplication", "value": 1.3 }
}

neoorigins:natural_regen_modifier

Before:

{ "type": "neoorigins:natural_regen_modifier", "multiplier": 0.5 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_natural_regen",
  "modifier": { "operation": "multiplication", "value": 0.5 }
}

neoorigins:knockback_modifier

Before:

{ "type": "neoorigins:knockback_modifier", "multiplier": 0.25 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_knockback",
  "modifier": { "operation": "multiplication", "value": 0.25 }
}

neoorigins:longer_potions

Before:

{ "type": "neoorigins:longer_potions", "duration_multiplier": 1.5 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_potion_duration",
  "modifier": { "operation": "multiplication", "value": 1.5 }
}

neoorigins:teleport_range_modifier

Before:

{ "type": "neoorigins:teleport_range_modifier", "multiplier": 2.0 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_teleport_range",
  "modifier": { "operation": "multiplication", "value": 2.0 }
}

neoorigins:more_animal_loot

Before:

{ "type": "neoorigins:more_animal_loot", "multiplier": 2.0 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_harvest_drops",
  "modifier": { "operation": "multiplication", "value": 2.0 }
}

neoorigins:efficient_repairs

Before:

{ "type": "neoorigins:efficient_repairs", "cost_multiplier": 0.5 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_anvil_cost",
  "modifier": { "operation": "multiplication", "value": 0.5 }
}

neoorigins:better_enchanting

Before:

{ "type": "neoorigins:better_enchanting", "bonus_levels": 5 }

After (note: add_base, not multiplication):

{
  "type": "neoorigins:action_on_event",
  "event": "mod_enchant_level",
  "modifier": { "operation": "add_base", "value": 5.0 }
}

neoorigins:better_crafted_food

Before:

{ "type": "neoorigins:better_crafted_food", "saturation_bonus": 0.5 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_crafted_food_saturation",
  "modifier": { "operation": "add_base", "value": 0.5 }
}

neoorigins:better_bone_meal

Before:

{ "type": "neoorigins:better_bone_meal", "extra_applications": 1 }

After:

{
  "type": "neoorigins:action_on_event",
  "event": "mod_bonemeal_extra",
  "modifier": { "operation": "add_base", "value": 1.0 }
}

→ neoorigins:persistent_effect

Collapses status-effect variants into a single list-of-effects shape.

neoorigins:status_effect

Pass-through: the legacy JSON shape already matches persistent_effect’s top-level fallback parse. Just change the type. Toggleable stays true by default (matching AbstractTogglePower semantics).

neoorigins:stacking_status_effects

Effects list passes through verbatim. The remap forces "toggleable": false since persistent_effect defaults to toggleable-on.

Before:

{
  "type": "neoorigins:stacking_status_effects",
  "effects": [
    { "effect": "minecraft:speed", "amplifier": 1 },
    { "effect": "minecraft:strength", "amplifier": 0 }
  ]
}

After:

{
  "type": "neoorigins:persistent_effect",
  "toggleable": false,
  "effects": [
    { "effect": "minecraft:speed", "amplifier": 1 },
    { "effect": "minecraft:strength", "amplifier": 0 }
  ]
}

neoorigins:night_vision

Before:

{ "type": "neoorigins:night_vision" }

After:

{
  "type": "neoorigins:persistent_effect",
  "effects": [
    {
      "effect": "minecraft:night_vision",
      "amplifier": 0,
      "ambient": true,
      "show_particles": false,
      "show_icon": false
    }
  ]
}

neoorigins:glow

Same shape as night_vision but with "effect": "minecraft:glowing" and "show_icon": true.

neoorigins:water_breathing

Before:

{ "type": "neoorigins:water_breathing" }

After (gated by neoorigins:in_water, not toggleable, icon hidden):

{
  "type": "neoorigins:persistent_effect",
  "toggleable": false,
  "condition": { "type": "neoorigins:in_water" },
  "effects": [
    {
      "effect": "minecraft:water_breathing",
      "amplifier": 0,
      "ambient": true,
      "show_particles": false,
      "show_icon": false
    }
  ]
}

→ neoorigins:condition_passive

Tick-based condition + action pairs. Default interval is 20 ticks.

neoorigins:biome_buff

Before:

{
  "type": "neoorigins:biome_buff",
  "biome_tag": "minecraft:is_forest",
  "effect": "minecraft:regeneration",
  "amplifier": 0
}

After:

{
  "type": "neoorigins:condition_passive",
  "condition": { "type": "neoorigins:biome", "tag": "minecraft:is_forest" },
  "entity_action": {
    "type": "neoorigins:apply_effect",
    "effect": "minecraft:regeneration",
    "duration": 300,
    "amplifier": 0
  },
  "interval": 20
}

neoorigins:damage_in_biome

Before:

{
  "type": "neoorigins:damage_in_biome",
  "biome_tag": "minecraft:is_ocean",
  "damage_per_second": 1.0,
  "damage_type": "generic"
}

After:

{
  "type": "neoorigins:condition_passive",
  "condition": { "type": "neoorigins:biome", "tag": "minecraft:is_ocean" },
  "entity_action": {
    "type": "neoorigins:damage",
    "amount": 1.0,
    "source": { "name": "generic" }
  },
  "interval": 20
}

neoorigins:damage_in_daylight

Before:

{
  "type": "neoorigins:damage_in_daylight",
  "damage_per_second": 1.0,
  "ignite": false
}

After (composed with neoorigins:and + neoorigins:not):

{
  "type": "neoorigins:condition_passive",
  "condition": {
    "type": "neoorigins:and",
    "conditions": [
      { "type": "neoorigins:exposed_to_sun" },
      { "type": "neoorigins:not", "condition": { "type": "neoorigins:in_water" } },
      { "type": "neoorigins:not", "condition": { "type": "neoorigins:on_fire" } }
    ]
  },
  "entity_action": {
    "type": "neoorigins:damage",
    "amount": 1.0,
    "source": { "name": "in_fire" }
  },
  "interval": 20
}

When "ignite": true, entity_action becomes { "type": "neoorigins:set_on_fire", "ticks": 40 } instead.

neoorigins:damage_in_water

Before:

{
  "type": "neoorigins:damage_in_water",
  "damage_per_second": 1.0,
  "include_rain": true
}

After (rain included via neoorigins:or):

{
  "type": "neoorigins:condition_passive",
  "condition": {
    "type": "neoorigins:or",
    "conditions": [
      { "type": "neoorigins:in_water" },
      { "type": "neoorigins:in_rain" }
    ]
  },
  "entity_action": {
    "type": "neoorigins:damage",
    "amount": 1.0,
    "source": { "name": "magic" }
  },
  "interval": 20
}

With "include_rain": false, the condition is just { "type": "neoorigins:in_water" }.

neoorigins:burn_at_health_threshold

Before:

{
  "type": "neoorigins:burn_at_health_threshold",
  "threshold_percent": 0.25,
  "fire_ticks": 60
}

After:

{
  "type": "neoorigins:condition_passive",
  "condition": {
    "type": "neoorigins:relative_health",
    "comparison": "<=",
    "compare_to": 0.25
  },
  "entity_action": { "type": "neoorigins:set_on_fire", "ticks": 60 },
  "interval": 20
}

neoorigins:regen_in_fluid

Before (water):

{
  "type": "neoorigins:regen_in_fluid",
  "fluid": "water",
  "amount_per_second": 1.0
}

After:

{
  "type": "neoorigins:condition_passive",
  "condition": { "type": "neoorigins:in_water" },
  "entity_action": { "type": "neoorigins:heal", "amount": 1.0 },
  "interval": 20
}

For "fluid": "lava", condition is { "type": "neoorigins:submerged_in", "fluid": "minecraft:lava" }.

→ neoorigins:attribute_modifier

Consolidated attribute modifier with optional condition / equipment_condition / location_condition gates (these fields pre-date 2.0 — see v1.13 release notes).

neoorigins:less_item_use_slowdown

Before:

{
  "type": "neoorigins:less_item_use_slowdown",
  "speed_multiplier": 0.5,
  "item_type": "any"
}

After:

{
  "type": "neoorigins:attribute_modifier",
  "attribute": "minecraft:movement_speed",
  "amount": 0.5,
  "operation": "add_multiplied_base",
  "condition": { "type": "neoorigins:using_item" }
}

Lossy: the legacy item_type filter ("bow" / "shield") is dropped — the alias applies to any item-use. A _migration_note field is written into the JSON at load time warning the pack author. If you need the filter, stay on the legacy class until a future DSL verb lands.

→ neoorigins:active_ability

Active-ability DSL collapses eight legacy active types onto entity_action.

neoorigins:active_launch

Before:

{ "type": "neoorigins:active_launch", "power": 1.5 }

After:

{
  "type": "neoorigins:active_ability",
  "entity_action": { "type": "neoorigins:add_velocity", "y": 1.5 }
}

neoorigins:active_dash

Before:

{ "type": "neoorigins:active_dash", "strength": 1.2 }

After (lossy — horizontal impulse approximates look-direction dash):

{
  "type": "neoorigins:active_ability",
  "entity_action": {
    "type": "neoorigins:pull_entities",
    "radius": 0,
    "strength": -1.2
  }
}

neoorigins:repulse

Before:

{ "type": "neoorigins:repulse", "radius": 6.0, "strength": 1.0 }

After:

{
  "type": "neoorigins:active_ability",
  "entity_action": {
    "type": "neoorigins:pull_entities",
    "radius": 6.0,
    "strength": -1.0,
    "include_players": true
  }
}

neoorigins:active_aoe_effect

Before:

{
  "type": "neoorigins:active_aoe_effect",
  "radius": 8.0,
  "effect": "minecraft:weakness",
  "duration": 200,
  "amplifier": 0
}

After:

{
  "type": "neoorigins:active_ability",
  "entity_action": {
    "type": "neoorigins:area_of_effect",
    "radius": 8.0,
    "entity_action": {
      "type": "neoorigins:apply_effect",
      "effect": "minecraft:weakness",
      "duration": 200,
      "amplifier": 0
    }
  }
}

neoorigins:active_swap

Before:

{ "type": "neoorigins:active_swap", "range": 20.0 }

After (swaps with NEAREST entity in radius — legacy used a look-direction raycast):

{
  "type": "neoorigins:active_ability",
  "entity_action": { "type": "neoorigins:swap_with_entity", "radius": 20.0 }
}

neoorigins:active_fireball

Before:

{ "type": "neoorigins:active_fireball", "speed": 1.5 }

After (lossy — legacy fired 3–4 fireballs with spread; alias fires one):

{
  "type": "neoorigins:active_ability",
  "entity_action": {
    "type": "neoorigins:spawn_projectile",
    "entity_type": "minecraft:small_fireball",
    "speed": 1.5
  }
}

neoorigins:active_bolt

Before:

{ "type": "neoorigins:active_bolt", "speed": 1.2 }

After:

{
  "type": "neoorigins:active_ability",
  "entity_action": {
    "type": "neoorigins:spawn_projectile",
    "entity_type": "minecraft:wind_charge",
    "speed": 1.2
  }
}

neoorigins:healing_mist

Before:

{
  "type": "neoorigins:healing_mist",
  "heal_amount": 6.0,
  "radius": 8.0,
  "heal_self": true
}

After:

{
  "type": "neoorigins:active_ability",
  "entity_action": {
    "type": "neoorigins:area_of_effect",
    "radius": 8.0,
    "include_source": true,
    "entity_action": { "type": "neoorigins:heal", "amount": 6.0 }
  }
}

Cross-mod compat aliases

Foreign-namespace equivalents for packs extracted from Apugli (abandoned at 2.11.0+1.20.4) and legacy Apoli. These bypass the neoorigins: / apace: translator because isOriginsFormat doesn’t match their prefixes.

apugli:edible_item / apoli:edible_item → neoorigins:edible_item

The remap hoists singular item → items[], singular tag → tags[], and flattens food_component.{nutrition, saturation_modifier, always_edible} up to the root.

Before:

{
  "type": "apugli:edible_item",
  "item": "minecraft:rotten_flesh",
  "food_component": {
    "nutrition": 4,
    "saturation_modifier": 0.2,
    "always_edible": true
  }
}

After:

{
  "type": "neoorigins:edible_item",
  "items": ["minecraft:rotten_flesh"],
  "nutrition": 4,
  "saturation": 0.2,
  "always_edible": true
}

Apugli-only fields effect, action, return_stack are dropped (same policy as the origins/apace translator).

apugli:action_on_jump → action_on_event { event: jump }

Thin event-key injection; entity_action passes through verbatim.

apugli:action_on_target_death → action_on_event { event: kill }

Thin event-key injection; entity_action passes through verbatim.

Power types NOT retired

These legacy types kept their standalone classes because the DSL can’t express them yet (too stateful, not an event trigger, or no matching verb exists). They still work, just aren’t collapsed.

Active abilities (stateful / specialised):

  • neoorigins:active_teleport — no look-direction teleport verb
  • neoorigins:active_recall — stateful saved position
  • neoorigins:active_place_block — no raycast-and-place verb
  • neoorigins:shadow_orb — stateful orb with tick loop
  • neoorigins:ground_slam — AoE on mobs; area_of_effect is players-only
  • neoorigins:tidal_wave — cone shape not modelled in area_of_effect
  • neoorigins:active_phase — movement state toggle, not an active ability

Non-tick-based condition interceptors:

  • neoorigins:mobs_ignore_player — LivingChangeTargetEvent interceptor
  • neoorigins:no_mob_spawns_nearby — MobSpawnEvent.FinalizeSpawn interceptor
  • neoorigins:item_magnetism — item-entity pull, no DSL verb yet
  • neoorigins:breath_in_fluid — air-supply drain, no DSL verb yet

Attribute-modifier candidates held back:

  • neoorigins:break_speed_modifier — PlayerEvent.BreakSpeed fires client-side only in current NeoForge
  • neoorigins:underwater_mining_speed — same BreakSpeed constraint
  • neoorigins:no_slowdown — unwired holder pending a slowdown-source DSL

Persistent-effect candidates held back:

  • neoorigins:effect_immunity — migrates under a different generic in a later phase

See the carve-out comments in LegacyPowerTypeAliases.registerActiveAbilityAliases, registerConditionPassiveAliases, registerAttributeModifierAliases, and registerPersistentEffectAliases for the authoritative list. Phase 7+ may add raycast / cone / mob-AoE verbs and shrink this list further.

Verb namespace migration — neoorigins: / apace: → neoorigins:

In 2.0.0 the canonical DSL verb namespace is neoorigins:. The legacy neoorigins: and apace: prefixes still parse — every verb your pack uses today will keep working — but they emit a one-shot [2.0-legacy] warning at first use:

[2.0-legacy] DSL verb 'neoorigins:damage' is deprecated — use 'neoorigins:damage'

Grep your logs for [2.0-legacy] to get the migration punch list. Verbs under the legacy prefixes will be removed no earlier than NeoOrigins 3.0 — you have the full 2.x lifecycle to migrate.

Why

Pre-2.0, the parser was an Apoli-compat layer. Verb names lived under neoorigins: because that’s what upstream Apoli used. When 2.0 introduced its own power types (neoorigins:condition_passive, neoorigins:modify_damage, …) the DSL verbs they composed with stayed on neoorigins:*, producing the awkward mix of namespaces inside a single power JSON:

// Pre-2.0 style — mixed namespaces
{
  "type": "neoorigins:condition_passive",
  "condition": { "type": "neoorigins:biome", "tag": "minecraft:is_nether" },
  "entity_action": { "type": "neoorigins:damage", "amount": 1.0 },
  "interval": 20
}

The canonicalization fixes this. Power types, condition verbs, and action verbs all live under the same namespace:

// 2.0.0 canonical
{
  "type": "neoorigins:condition_passive",
  "condition": { "type": "neoorigins:biome", "tag": "minecraft:is_nether" },
  "entity_action": { "type": "neoorigins:damage", "amount": 1.0 },
  "interval": 20
}

How to migrate

For a quick pass, run a find-replace over your pack’s JSON:

# On every power JSON:
sed -i 's/"type": *"neoorigins:/"type": "neoorigins:/g' path/to/powers/*.json
sed -i 's/"type": *"apace:/"type": "neoorigins:/g' path/to/powers/*.json

The verb names are identical — only the namespace changes. No field shapes were changed as part of this canonicalization.

Bare verb names ("type": "and") still work and are auto-prefixed; the autoprefix target moved from neoorigins: → neoorigins: for the 2.0 release. If your pack relies on bare names and needed them resolved as neoorigins:* for some reason, write them out explicitly.

Verbs that were already neoorigins:*

A dozen or so verbs introduced fresh in 2.0 were already namespaced correctly: neoorigins:in_set, neoorigins:no_minions_alive, neoorigins:hit_taken_amount, neoorigins:food_item_in_tag, neoorigins:toggle, neoorigins:add_to_set, neoorigins:remove_from_set, neoorigins:chain_to_nearest, neoorigins:pull_entities, neoorigins:swap_with_entity, neoorigins:teleport_to_marker, neoorigins:damage_attacker, neoorigins:ignite_attacker, neoorigins:effect_on_attacker, neoorigins:random_teleport, neoorigins:cancel_event, neoorigins:spawn_projectile.

These were unchanged.

Lossy translations — aliases that drop fields

A handful of aliases simplify the legacy behaviour because no 2.0 DSL verb matches the legacy 1:1. They still work, but a pack that actually relied on the dropped field will behave differently after the alias kicks in. Keep the legacy type declaration (i.e. let the legacy class stay registered) if any of these matter for your pack.

Legacy type What’s dropped Workaround / roadmap
active_dash Look-direction projection — the alias lands a horizontal impulse; the legacy class computed the dash vector from the player’s look axis. Needs a look_direction vector DSL verb. Targeted for Phase 7. Until then, keep the legacy class or expect roughly horizontal dashes.
active_fireball Multi-shot spread — legacy fired 3–4 small fireballs with a random spread cone. The alias shoots one. No multi-shot DSL verb yet. Legacy class still registered; keep it for shotgun behaviour.
less_item_use_slowdown Item-type filter (item_type: bow / shield / any). Alias applies to any item-use. No item-type condition verb yet. Packs filtering by tool keep the legacy class.

Aliases that inject a _migration_note field into the rewritten JSON will also have this flagged in the runtime log the first time they fire.

DSL gaps worth knowing about

Runtime hooks and verb shapes that don’t exist in 2.0 yet — flagged in LegacyPowerTypeAliases.java as carve-outs. Each one blocks one or more alias collapses until it lands.

Missing verb / hook Blocks Notes
Look-direction vector active_dash full port, any future look_impulse Needs a direction_source: look field on add_velocity.
Multi-shot projectile active_fireball shotgun, future spray powers Either loop spawn_projectile × N with a spread seed, or a dedicated spawn_projectile_spread verb.
Raycast-and-place block active_place_block Needs a block-placement action with a raycast source.
Cone-shape AoE tidal_wave Existing area_of_effect is radial only; needs an angled/cone variant.
AoE on mobs (not players) ground_slam area_of_effect targets players only by default; needs a mob-target mode.
Item-type condition less_item_use_slowdown filter Predicate on the item stack the player is currently using.
Slowdown-source condition no_slowdown Need to tell movement-slowdown from tick-slowdown vs item-use slowdown.
Air-supply modifier action breath_in_fluid Either a tick-driven attribute or a dedicated air-drain action.
Item-entity pull action item_magnetism Needs an entity-attraction action with item-entity filter.
Server-authoritative PlayerEvent.BreakSpeed break_speed_modifier, underwater_mining_speed collapses BreakSpeed fires client-only in current NeoForge; packs use the attribute fallback in the concrete class.

Questions

If you hit a legacy type not documented here, check LegacyPowerTypeAliases.java — it’s the source of truth. Or open an issue.