How do I get the AI to accept Adopt into House?

The AI weighs it (the answer is partly random). Its reasons: Child reluctant to leave living parent's House -15, Close Family of House Head -15, Weak Hook used +40, I get Gold +25, I already have a House -15, My House is a Powerful Family -10, My House is a Dominant Family -25, Your House is a Powerful Family +10, Your House is a Dominant Family +25, I hate my House Head +15, I like my House Head -15, You are my Friend +10, You are my Guardian +10, I am Lowborn +10, I am a noble -15, I have ambitions of more +10, Relative House Family Rating, Relative House Level of Splendor, My House is smaller +10, Your Faith is …, Faith Hostility to Realm State Rite, …-… Cultural Acceptance, …-… Cultural Acceptance, Noble Family Adoption is foreign Tradition -10 and Their Age.

Interaction · Friendly actions

Adopt into House

from 150Prestigefrom 100Piety

variesInfluenceThe AI weighs it (the answer is partly random)

Adopt the recipient as a member of House …

What you need

You

To send it

Is an Adult
The recruitee:
- is_hostage = no
- … is traveling to become a Hostage
- Already under negotiation to become someone's Ward
- Already under negotiation to become someone's Guardian
- If a child: Is an unrelated child
- None of these
  - Is imprisoned
  - Is Leasing holdings from their Liege
  - is_diarch = yes
  - If
    Their host: Is played by a person
    Is not the recruiter’s player heir
    Then
    is_player_heir_of = host
  - If
    Their host: Is played by the AI
    Is not the recruiter’s player heir
    Then
    is_primary_heir_of = host
  - If
    a check the game hides
    Then
    is_consort_of = host
  - If
    a check the game hides
    Then
    Their host: They is pressing … Claim
  - If
    a check the game hides
    Then
    One of these
    is_councillor_of = scope:recruitee.host
    or
    is_knight_of = scope:recruitee.host
    or
    Any relation:
    One of these
    this = scope:recruitee.host
    or
    is_close_family_of = scope:recruitee.host
    or
    Any relation:
    One of these
    this = scope:recruitee.host
    or
    is_close_family_of = scope:recruitee.host
    or
    Any relation:
    One of these
    this = scope:recruitee.host
    or
    is_close_family_of = scope:recruitee.host
    or
    Any relation:
    One of these
    this = scope:recruitee.host
    or
    is_close_family_of = scope:recruitee.host
    or
    Any court position employer:
    this = scope:recruitee.host
  - If
    The recruiter: Has a Adventurer Government
    Then
    Adventurers may only invite their Player Heir, Soulmate, Best Friend, or Spouses to their Camp
  - They is in a Matrilineal marriage and their partner is employed by their liege
  - They is in a Patrilineal marriage and their partner is employed by their liege
  - You recently tried to Imprison They
  - They is a merchant traveling on a nomad ruler's order

To see it in the menu

Your house’s house head › Any held title: The … is a Noble Family Title
Your culture: The Culture has the Noble Family House Heads may use the Adopt into House Interaction Tradition
If
a check the game hides
Then
- Your house: Has the house check as house head
If played by the AI › Your house: House member (at most 5):

The character you target

To send it

Is at least 10 years old
If
a check the game hides
Then
- … is a House Head
Is not a ruler
Does not have the Trait: Monk
Also needed: available (not in an army, not imprisoned, not incapable) · none of the traits Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux · not busy in an Activity · not planning another Activity · not busy in a Mandala succession

To see it in the menu

Is not of the same house as you
No ancestor:

Adopt into House is a friendly character interaction in Crusader Kings III. You need: Is an Adult. The character you target needs: Is available (not in an army, not imprisoned, not incapable), Has none of the traits: Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux, Busy participating in an Activity and 5 more. The AI weighs it (the answer is partly random). Reasons the AI weighs include Child reluctant to leave living parent's House (-15), Close Family of House Head (-15), Weak Hook used (+40) and 15 more. It costs Prestige (from 150), Piety (from 100), Influence (varies). Patch 1.20.1.2, from game/common/character_interactions/06_ep3_interactions.txt.

for a guide, post or blog

Quick answers (3)

What are the requirements for Adopt into House in CK3?: You: Is an Adult. The character you target: Is available (not in an army, not imprisoned, not incapable), Has none of the traits: Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux, Busy participating in an Activity, You are already planning another Activity, You are currently busy in a Mandala succession, Is at least 10 years old, Is not a ruler and Does not have the Trait: Monk. (patch 1.20.1.2)
How do I get the AI to accept Adopt into House?: The AI weighs it (the answer is partly random). Its reasons: Child reluctant to leave living parent's House -15, Close Family of House Head -15, Weak Hook used +40, I get Gold +25, I already have a House -15, My House is a Powerful Family -10, My House is a Dominant Family -25, Your House is a Powerful Family +10, Your House is a Dominant Family +25, I hate my House Head +15, I like my House Head -15, You are my Friend +10, You are my Guardian +10, I am Lowborn +10, I am a noble -15, I have ambitions of more +10, Relative House Family Rating, Relative House Level of Splendor, My House is smaller +10, Your Faith is …, Faith Hostility to Realm State Rite, …-… Cultural Acceptance, …-… Cultural Acceptance, Noble Family Adoption is foreign Tradition -10 and Their Age.
How much does Adopt into House cost?: Prestige (from 150), Piety (from 100), Influence (varies) (patch 1.20.1.2).

Will they accept?

The AI adds these up and accepts above zero; near zero the answer is partly random (ai_maybe). Reasons in italics are the script's, with no label in the game.

Reason	Amount
Base	0
Child reluctant to leave living parent's House when Any parent: Is of the same house as the target	-15
Close Family of House Head when `is_close_family_of = house.house_head`	-15
Weak Hook used when You use a Hook	+40
I get Gold when The option “gold” is chosen	+25
I already have a House	-15
My House is a Powerful Family when Your house: `is_powerful_family = yes`	-10
My House is a Dominant Family when Your house: `is_dominant_family = yes`	-25
Your House is a Powerful Family when Your house: `is_powerful_family = yes`	+10
Your House is a Dominant Family when Your house: `is_dominant_family = yes`	+25
Their opinion of you × 0.5	varies
I hate my House Head when If a check the game hides Then Your house: Does not have the house check as house head Opinion of house.house_head at most -40	+15
I like my House Head when If a check the game hides Then Your house: Does not have the house check as house head Opinion of house.house_head at least 40	-15
You are my Friend when Has you as friend	+10
You are my Guardian when Has you as guardian	+10
I am Lowborn	+10
I am a noble when Is Lowborn or of an insignificant Dynasty	-15
I have ambitions of more when Has the Trait: Ambitious Is Lowborn or of an insignificant Dynasty	+10
Relative House Family Rating when `house.house_head.top_liege ?= scope:actor.house.house_head.top_liege`	varies
Relative House Level of Splendor when `scope:recipient.dynasty.dynasty_prestige_level != scope:actor.dynasty.dynasty_prestige_level`	varies
My House is smaller when Your house: House member (less than 5): Your house: House member (at least 5):	+10
Your Faith is … when Your faith: `faith_hostility_level = { target = scope:actor.faith value >= faith_astray_level }`	varies
Faith Hostility to Realm State Rite when Your rite: `rite_hostility_level = { target = scope:actor.top_liege.primary_title.state_rite value >= faith_astray_level }`	varies
…-… Cultural Acceptance when Your culture is the same as that of actor `scope:recipient.culture.cultural_acceptance(scope:actor.culture) < 50`	varies
…-… Cultural Acceptance when Your culture is the same as that of actor `scope:recipient.culture.cultural_acceptance(scope:actor.culture) >= 50`	varies
Noble Family Adoption is foreign Tradition when None of these Your culture: The Culture has the Noble Family House Heads may use the Adopt into House Interaction Tradition	-10
Their Age when Is at least 31 years old	varies

Acceptance (ai_accept) (216 lines of game script)

base = 0
modifier = {
	exists = house
	any_parent = {
		is_alive = yes
		house = scope:recipient.house
	}
	add = -15
	desc = MY_PARENT_HOUSE
}
modifier = {
	exists = house.house_head
	is_close_family_of = house.house_head
	add = -15
	desc = CLOSE_FAMILY_OF_HOUSE_HEAD
}
modifier = {
	scope:hook = yes
	add = 40
	desc = SCHEME_WEAK_HOOK_USED
}
modifier = {
	scope:gold = yes
	add = 25
	desc = SCHEME_WITH_GIFT_SIGNIFICANT
}
modifier = {
	add = -15
	desc = I_ALREADY_HAVE_A_HOUSE
	exists = house.house_head
}
modifier = {
	add = -10
	desc = MY_HOUSE_IS_POWERFUL
	house ?= {
		is_powerful_family = yes
	}
}
modifier = {
	add = -25
	desc = MY_HOUSE_IS_DOMINANT
	house ?= {
		is_dominant_family = yes
	}
}
modifier = {
	scope:actor.house = {
		is_powerful_family = yes
	}
	add = 10
	desc = YOUR_FAMILY_IS_POWERFUL
}
modifier = {
	scope:actor.house = {
		is_dominant_family = yes
	}
	add = 25
	desc = YOUR_FAMILY_IS_DOMINANT
}
opinion_modifier = {
	opinion_target = scope:actor
	multiplier = 0.5
}
modifier = {
	add = 15
	desc = I_HATE_MY_HOUSE_HEAD
	exists = house.house_head
	is_house_head = no
	opinion = {
		value <= medium_negative_opinion
		target = house.house_head
	}
}
modifier = {
	add = -15
	desc = I_LIKE_MY_HOUSE_HEAD
	exists = house.house_head
	is_house_head = no
	opinion = {
		value >= medium_positive_opinion
		target = house.house_head
	}
}
modifier = {
	add = 10
	desc = youre_my_friend_tt
	has_relation_friend = scope:actor
}
modifier = {
	add = 10
	desc = youre_my_guardian_tt
	has_relation_guardian = scope:actor
}
modifier = {
	add = 10
	desc = I_WANT_A_HOUSE
	NOT = {
		exists = house
	}
}
modifier = {
	add = -15
	desc = i_am_noble_tt
	has_no_particular_noble_roots_trigger = no
}
modifier = {
	add = 10
	desc = ambition_tt
	has_trait = ambitious
	has_no_particular_noble_roots_trigger = yes
}
modifier = {
	exists = scope:actor.house
	exists = scope:recipient.house
	house.house_head.top_liege ?= scope:actor.house.house_head.top_liege
	add = {
		value = scope:actor.house.house_power_score
		subtract = scope:recipient.house.house_power_score
	}
	desc = RELATIVE_FAMILY_RATING
}
modifier = {
	exists = scope:actor.house
	exists = house
	scope:recipient.dynasty.dynasty_prestige_level != scope:actor.dynasty.dynasty_prestige_level
	add = {
		value = scope:actor.dynasty.dynasty_prestige_level
		subtract = scope:recipient.dynasty.dynasty_prestige_level
		multiply = 10
	}
	desc = RELATIVE_FAMILY_RENOWN
}
modifier = {
	house ?= {
		any_house_member = {
			count < 5
			is_alive = yes
		}
	}
	scope:actor.house ?= {
		any_house_member = {
			count >= 5
			is_alive = yes
		}
	}
	add = 10
	desc = MY_HOUSE_IS_SMALL
}
modifier = {
	faith = {
		faith_hostility_level = {
			target = scope:actor.faith
			value >= faith_astray_level
		}
	}
	add = {
		value = faith.faith_hostility_level(scope:actor.faith)
		multiply = -10
	}
	desc = FAITH_HOSTILITY_LEVEL
}
modifier = {
	exists = scope:actor.top_liege.primary_title.state_rite
	rite = {
		rite_hostility_level = {
			target = scope:actor.top_liege.primary_title.state_rite
			value >= faith_astray_level
		}
	}
	add = {
		value = rite.rite_hostility_level(scope:actor.top_liege.primary_title.state_rite)
		multiply = -5
	}
	desc = FAITH_HOSTILITY_LEVEL_STATE_FAITH
}
modifier = {
	culture != scope:actor.culture
	scope:recipient.culture.cultural_acceptance(scope:actor.culture) < 50
	add = {
		value = 50
		subtract = scope:recipient.culture.cultural_acceptance(scope:actor.culture)
		multiply = -0.25
		round = yes
	}
	desc = CULTURAL_ACCEPTANCE
}
modifier = {
	culture != scope:actor.culture
	scope:recipient.culture.cultural_acceptance(scope:actor.culture) >= 50
	add = {
		value = scope:recipient.culture.cultural_acceptance(scope:actor.culture)
		subtract = 50
		multiply = 0.25
		round = yes
	}
	desc = CULTURAL_ACCEPTANCE
}
modifier = {
	NOT = {
		culture = {
			has_cultural_parameter = allows_noble_family_adoption
		}
	}
	add = -10
	desc = NOBLE_FAMILY_ADOPTION_NOT_CULTURAL
}
modifier = {
	exists = house
	age >= 31
	add = {
		value = age
		subtract = 30
		multiply = -1
	}
	desc = THEIR_AGE_REASON
}

As written in game/common/character_interactions/06_ep3_interactions.txt.

What happens

If they accept

The character you target:
- If
  a check the game hides
  Then
  Their house’s house head:
  If
  Your culture: Their Culture has the Characters of this Culture can Adopt unrelated orphaned Children, and do not lose Opinion for doing so Tradition
  The character you target:
  Their culture: The Culture has the Characters of this Culture can Adopt unrelated orphaned Children, and do not lose Opinion for doing so Tradition
  None of these
  Any parent:
  is_alive = yes
  can_be_combatant_based_on_gender_trigger = { ARMY_OWNER = liege }
  Then
  Opinion: Adopted My House Member (+25)
  Otherwise
  Opinion: Adopted My House Member (-25)
  If
  has_hook_of_type = { type = house_head_hook target = scope:recipient }
  Then
  remove_hook = { type = house_head_hook target = scope:recipient }
You:
- If
  The option “gold” is chosen
  Then
  Pay gold to the target
- If
  You use a Hook
  Then
  Use a Hook on the target
- The character you target:
  - set_house = scope:actor.house
- Their house:
  - Every Zealous House member:
    Where:
    Ai zeal at least 35
    Their faith:
    faith_hostility_level = { target = scope:recipient.faith value >= faith_astray_level }
    Opinion: Adopted New House Member (-20)
  - Every Close Family member in House …:
    Only some of them (the filter is in the script below)
    Opinion: Adopted New House Member (-10)
The character you target:
- If any relation:
  - The old guardian:
    remove_relation_ward = scope:adoptee
    If
    is_foreign_court_guest = yes
    None of these
    host = liege
    is_playable_character = { }
    Any relation:
    is_playable_character = { }
    this = scope:old_guardian.host
    Then
    return_to_court = yes
  - If never › The adoptee:
    return_ward_travel_effect = { }
  - Otherwise:
    If
    a check the game hides
    Then
    The old guardian:
    If
    Has the opinion “Guardian of Your Heir”
    Then
    remove_opinion = { modifier = guardian_of_heir_opinion target = scope:adoptee.liege }
    Else if
    Has the opinion “Guardian of Your Relative”
    None of these
    Any relation:
    is_close_family_of = scope:adoptee.liege
    Then
    remove_opinion = { modifier = guardian_of_relative_opinion target = scope:adoptee.liege }
    If
    Has the opinion “Parochial Guardian of Your Heir”
    Then
    remove_opinion = { modifier = guardian_of_heir_parochial_opinion target = scope:adoptee.liege }
    Else if
    Has the opinion “Parochial Guardian of Your Relative”
    None of these
    Any relation:
    is_close_family_of = scope:adoptee.liege
    Then
    remove_opinion = { modifier = guardian_of_relative_parochial_opinion target = scope:adoptee.liege }
    The adoptee:
    If
    a check the game hides
    Then
    var:guardian_liege:
    If
    Has the opinion “Guardian of Your Heir”
    Then
    remove_opinion = { modifier = guardian_of_heir_opinion target = scope:adoptee.liege }
    Else if
    Has the opinion “Guardian of Your Relative”
    None of these
    Any relation:
    is_close_family_of = scope:adoptee.liege
    Then
    remove_opinion = { modifier = guardian_of_relative_opinion target = scope:adoptee.liege }
    If
    Has the opinion “Parochial Guardian of Your Heir”
    Then
    remove_opinion = { modifier = guardian_of_heir_parochial_opinion target = scope:adoptee.liege }
    Else if
    Has the opinion “Parochial Guardian of Your Relative”
    None of these
    Any relation:
    is_close_family_of = scope:adoptee.liege
    Then
    remove_opinion = { modifier = guardian_of_relative_parochial_opinion target = scope:adoptee.liege }
- If
  NOT = { scope:destination_province = scope:recipient.location }
  Then
  Sets out on a journey (a travel plan)
  … must first Travel to … court
  Else if
  You:
  NOT = { is_in_the_same_court_as = scope:recipient }
  Then
  You:
  add_courtier = scope:recipient

If they refuse

The character you target:
- If
  You: Is played by the AI
  Then
  You gains the opinion “Angry” (-20) of them
- If played by the AI: Opinion: Respect (-10)

Options when sending

Use Gold
Use a Hook

Events it fires: ep3_interactions_events.0400

• the game's own tooltip text · ◦ our reading of the script line · code the script where neither exists

Who can use it and sees it (is_available, is_shown) (29 lines of game script)

is_available = house.house_head ?= {
	any_held_title = {
		is_noble_family_title = yes
	}
}
culture ?= {
	has_cultural_parameter = allows_noble_family_adoption
}
is_house_head = yes
trigger_if = {
	limit = {
		is_ai = yes
	}
	house ?= {
		any_house_member = {
			count <= 5
			is_alive = yes
		}
	}
}
is_shown = scope:actor != scope:recipient
scope:recipient = {
	NOR = {
		house ?= scope:actor.house
		any_ancestor = {
			this = scope:actor
		}
	}
}

As written in game/common/character_interactions/06_ep3_interactions.txt.

Can be sent when (is_valid…) (25 lines of game script)

scope:actor = {
	is_adult = yes
}
can_recruit_character_to_court_trigger = {
	RECRUITER = scope:actor
	RECRUITEE = scope:recipient
}
scope:recipient = {
	is_available = yes
	age >= 10
	trigger_if = {
		limit = {
			exists = house.house_head
		}
		custom_tooltip = {
			text = adopt_interaction_noble_family_is_not_house_head_tt
			scope:recipient.house.house_head != scope:recipient
		}
	}
	is_ruler = no
	NOT = {
		has_trait = devoted
	}
}

As written in game/common/character_interactions/06_ep3_interactions.txt.

Effects (on_send, on_accept, on_decline) (49 lines of game script)

on_accept = show_as_tooltip = {
	noble_family_adoption_effect = {
		ADOPTEE = scope:recipient
		ADOPTER = scope:actor
	}
}
hidden_effect = {
	scope:actor = {
		trigger_event = ep3_interactions_events.0400
	}
}
on_decline = scope:actor = {
	send_interface_toast = {
		type = event_toast_effect_bad
		title = noble_family_adoption_effect_toast
		left_icon = scope:recipient
		right_icon = scope:actor
		scope:recipient = {
			send_interface_toast = {
				type = event_toast_effect_bad
				title = noble_family_adoption_effect_toast
				left_icon = scope:recipient
				right_icon = scope:actor
				if = {
					limit = {
						scope:actor = {
							is_ai = yes
						}
					}
					reverse_add_opinion = {
						modifier = angry_opinion
						opinion = -20
						target = scope:actor
					}
				}
				if = {
					limit = {
						is_ai = yes
					}
					add_opinion = {
						modifier = respect_opinion
						opinion = -10
						target = scope:actor
					}
				}
			}
		}
	}
}

As written in game/common/character_interactions/06_ep3_interactions.txt.

Category: Friendly actions
Cost: Prestige: from 150
Cost: Piety: from 100
Cost: Influence: varies
Again on the same character: after 5 years
In the menu: under More…
ID: noble_family_adoption_interaction

Source: game/common/character_interactions/06_ep3_interactions.txt and the English localisation, Crusader Kings III 1.20.1.2. “You” is the character who sends it (scope:actor, or a puppet acting for you); “the character you target” is the recipient. “…” marks words the game fills in at play time (a name, a title).