Origins: Powerful Powers Handbook

Origins: Powerful Powers (OPP) is a Fabric mod for Minecraft 1.20.1 that adds new building blocks to Origins datapacks. Everything it adds is used from power JSON with "type": "origins-powerful-powers:<id>", the same way as Origins' own origins:<id> types.

What it adds:

40 entity conditions: attack cooldown, recent damage and damage blocked, knockback, crouch depth, sprint time, glide ratio, friction, light level at the eyes, moon phase, sleeping, redstone power, vanilla statistics, and more.
A block condition for redstone signal strength (redstone_power), usable wherever Origins checks a block.
Actions: turn an entity's view (set_rotation, look_at), fake block-crack animations (play_block_crack), item and vibration cooldowns, fake mobs and fake players only chosen players can see, which powers can act on (spawn_fake_entity, fake_entity_action), and disguises that make an entity look like another type (disguise).
Signals: one power announces something by name (emit_signal) and unrelated powers react (action_on_signal), so separately written origins can work together.
Fake blocks: show chosen players a different block at a position (set_fake_block, the fake_blocks power, /opp fakeblock).
Name obfuscation and tab-list hiding: scramble a player's name and Styled Nicknames nickname for chosen viewers (obfuscate_name, /opp obfuscate), or leave a player out of chosen tab lists (hidden_from_tablist, hide_from_tablist, /opp tablist).
Entity-tied chunk loading: keep the chunks around an entity loaded like /forceload, following it as it moves (the chunk_loader power, load_chunks, /opp chunkload).
Power tags: group powers in one datapack file (wildcards included) and check them with has_power_tag.
45 read-only attributes with the same values, readable with /attribute and Origins' origins:attribute condition, with no power needed.
A settable drag attribute on every living entity that replaces vanilla's fall-drag constant.
Variables and lists. Typed per-player data (int, double, String, …) that you change and check with Java expressions. You can use it in any Origins field and in commands, and it can read scoreboards and the items in a power inventory.
A global store. Typed values and lists addressed by a key, saved with the world, with optional locking and automatic cleanup of keys tied to entities.
Power inventories read and written from commands, including each slot's item id as plain text.
Simple Voice Chat integration: conditions for talking, whispering and groups, plus voice broadcast, forced mute and forced deafen.
Hardcore Revival integration: an is_downed condition for players knocked out in Hardcore Revival.
Styled Nicknames integration: name obfuscation covers nicknames too.
Commands: /opp with (variables in any command), /opp powerinv (read and write origins:inventory powers), /opp fakeentity, /opp disguise, /opp global, /opp fakeblock, /opp chunkload, /opp obfuscate, /opp tablist, /opp powertag, /disableshield, /oppvc.

The pages read in order, like slides, and each one also works as a reference.

Pages

#	Page	What's in it
1	Getting started	Requirements, installing, your first OPP power, how these docs are laid out
2	Entity conditions	The 40 condition types: combat, movement, body, world, mobs, items, integrations
3	Bi-entity conditions	`is_observed_by`, `has_power_tag`
4	Damage conditions	`damage_source_nbt`
5	Block conditions	`redstone_power`
6	Entity actions	signals, fake blocks, entity-tied chunk loading, name obfuscation, tab list hiding, `set_vibration_cooldown`, `set_item_cooldown`, `set_rotation`, `look_at`, `spawn_fake_entity`, `disguise`, `undisguise`, the block action `play_block_crack`, `fake_entity_action`, the `fake_entity` condition, `action_on_fake_entity_hit`, the event powers (death, join, disconnect, start tracking, mob conversion, sleep start), `action_on_chat`, and where the other actions live
7	Attributes	The 45 read-only attributes, plus the settable `drag`
8	Variables	Declaring, changing and checking per-player variables, and HUD bars
9	Variables in Origins fields, commands and scoreboards	`with_variables`, `/opp with`, `Scoreboard.get`, modifier `resource`
10	Language reference	The Java expression language: operators, types, built-ins (including `Death`, `Stat` and `Global`), errors
11	Lists and loops	`list`, `power_list`, `for_each`, `for_each_read`
12	Global store	Values shared by every entity: `Global.*`, `global_variables`, `modify_global`, locking, cleanup, `/opp global`
13	Voice chat	Simple Voice Chat conditions, broadcast, mute and deafen
14	Power inventories	Reading and writing `origins:inventory` powers
15	Commands	Every command in one place
16	Power tags	Grouping powers in a datapack file, the `has_power_tag` condition, `/opp powertag`
17	Cookbook	Complete powers that combine several features

Every id

Condition types

Id	Kind	Page
`attack_cooldown_progress`	entity	2
`biome_temperature`	entity	2
`critical_hit_eligible`	entity	2
`crouch_depth`	entity	2
`damage_source_nbt`	damage	4
`distance_to_nearest_player`	entity	2
`exhaustion`	entity	2
`expression`	entity, bi-entity	8
`friction`	entity	2
`glide_ratio`	entity	2
`has_attack_target`	entity	2
`has_power_tag`	entity, bi-entity	16
`hurt_time`	entity	2
`in_same_voice_group`	bi-entity	13
`in_voice_group`	entity	13
`in_voice_range_of`	bi-entity	13
`invulnerable_ticks`	entity	2
`is_blocking`	entity	2
`is_broadcasting_voice`	entity	13
`is_deafened_voice`	entity	13
`is_jumping`	entity	2
`is_moving_loudly`	entity	2
`is_muted_voice`	entity	13
`is_observed_by`	bi-entity	3
`is_sleeping`	entity	2
`is_talking`	entity	13
`is_whispering`	entity	13
`item_on_cooldown`	entity	2
`last_attack_reach`	entity	2
`last_damage_amount`	entity	2
`last_damage_was_crit`	entity	2
`last_damage_type`	entity	2
`last_hit_was_crit`	entity	2
`light_at_eyes`	entity	2
`look_angle`	entity	2
`moon_phase`	entity	2
`fake_entity`	entity	6
`projectile_age`	entity	2
`recent_damage_taken`	entity	2
`recent_damage_blocked`	entity	2
`recent_knockback`	entity	2
`redstone_power`	block, entity	5, 2
`regional_difficulty`	entity	2
`sprint_ticks`	entity	2
`stat`	entity	2
`submersion_depth`	entity	2
`time_airborne`	entity	2
`time_since_last_meal`	entity	2
`velocity`	entity	2
`vibration_on_cooldown`	entity	2
`voice_installed`	entity	13
`voice_mic_disabled`	entity	13
`with_variables`	entity, bi-entity	9
`xp_progress`	entity	2

Action types

Id	Kind	Page
`clear_fake_block`	entity, block	6
`delete_global`	entity, bi-entity	12
`despawn_fake_entity`	entity	6
`disguise`	entity	6
`execute`	entity, bi-entity	8
`for_each`	entity, bi-entity	11
`for_each_read`	entity, bi-entity	11
`hide_from_tablist`	entity	6
`load_chunks`	entity	6
`emit_signal`	entity	6
`look_at`	entity, bi-entity	6
`modify_global`	entity, bi-entity	12
`modify_variable`	entity, bi-entity	8
`fake_entity_action`	entity	6
`play_block_crack`	block	6
`set_fake_block`	entity, block	6
`show_in_tablist`	entity	6
`set_item_cooldown`	entity	6
`set_rotation`	entity	6
`set_vibration_cooldown`	entity	6
`spawn_fake_entity`	entity	6
`start_broadcast_voice`	entity	13
`stop_broadcast_voice`	entity	13
`stop_loading_chunks`	entity	6
`undisguise`	entity	6
`with_variables`	entity, bi-entity	9

Power types

Id	Page
`variables`	8
`variable_bar`	8
`global_variables`	12
`list`	11
`power_list`	11
`item_list`	11
`action_on_death`	6
`action_on_join`	6
`action_on_disconnect`	6
`action_on_start_tracking`	6
`action_on_mob_conversion`	6
`action_on_sleep_start`	6
`action_on_signal`	6
`fake_blocks`	6
`chunk_loader`	6
`obfuscate_name`	6
`hidden_from_tablist`	6
`action_on_chat`	6
`action_on_fake_entity_hit`	6

Commands

Command	Page
`/opp with <targets> <command>`	9, 15
`/opp fakeentity spawn\|player <owner> <entity_type\|username> <pos> <lifetime> [behavior …] [viewers …] [id …]`	6, 15
`/opp fakeentity run <id> <command>`	6, 15
`/opp disguise <targets> <entity_type> [duration …] [viewers …]`, `/opp undisguise <targets>`	6, 15
`/opp global get\|set\|delete\|list\|prune\|lock\|unlock …`	12, 15
`/opp fakeblock set\|clear …`	6, 15
`/opp chunkload start\|stop\|list …`	6, 15
`/opp obfuscate <targets> [duration …] [viewers …]`, `/opp unobfuscate <targets>`	6, 15
`/opp tablist hide\|show …`	6, 15
`/opp powertag list\|of …`	16
`/opp powerinv …`	14, 15
`/disableshield <targets> <ticks>`	15
`/oppvc broadcast\|mute\|deafen …`	13, 15
`/gamerule whitelistFeedback <username> …`	15
`/gamerule oppPlayerExpiryDays <days>`	15

The 45 read-only attributes (plus drag) are listed on page 7.

Suspected bugs

Unconfirmed behavior worked out from the code.

Where	Suspected behavior
`look_angle`	The raw yaw is unwrapped, so after turning around several times it can leave the −180 to 180 range. The attribute is clamped to that range.
Variable bar	Origins' `/resource` command works on the bar too.
`Scoreboard.get`	The client may only know objectives shown in a display slot, so conditions that Origins checks on the client may fail to read scores.

Changelog

Every version's changes, newest first

1.0.0

First release.