Will the AI accept Restore Inheritance?

Yes: it is accepted automatically.

Interaction · Friendly actions

Restore Inheritance

variesRenownAccepted automatically

Dynasty Head Interaction Restore the recipient to the natural Line of Succession This is available because they has been Disinherited

What you need

You

To send it

Your dynasty:
- dynasty_prestige >= miniscule_dynasty_prestige_value

To see it in the menu

If played by the AI:
- Is a Dynasty Head
- Is at not War
Is a Dynasty Head
Is of the same dynasty as the target

The character you target

Has the Trait: Disinherited

Restore Inheritance is a friendly character interaction in Crusader Kings III. Accepted automatically. It costs Renown (varies). Patch 1.20.1.2, from game/common/character_interactions/00_dynast_interactions.txt.

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Quick answers (2)

Will the AI accept Restore Inheritance?: Yes: it is accepted automatically.
How much does Restore Inheritance cost?: Renown (varies) (patch 1.20.1.2).

Will they accept?

The other character has no choice: the game accepts it automatically.

What happens

Effects

Stress and fulfillment impact: by trait: Vengeful +20, Stubborn +20
The character you target:
- Loses the Trait Disinherited
- If
  Has the opinion “Disinherited” of you
  Then
  Loses the opinion “Disinherited” of you
  Their house:
  If
  None of these
  Any house member:
  this != scope:recipient
  Has the opinion “Disinherited” of you
  Then
  All house members of …: Loses the opinion “Disinherited a House Member” of you
  Otherwise
  If
  a check the game hides
  Then
  Opinion: Restored Inheritance
  Their house › All house members of …: Opinion: Restored a House Member Inheritance
If
- You: Government is Clan
- The character you target: Government is Clan
- Your house is the target’s
- If
  You are not the target
  Then
  You are not the target
Then
- Your house:
  add_unity_value = { … }
Else if
- No
- You: Government is Clan
- Your house: Has you as house head
- One of these
  All of these
  exists = scope:recipient.house
  Your house is not the target’s
  or
  The character you target: Is Lowborn
Then
- Your house:
  add_unity_value = { … }

When it is accepted automatically

The character you target: Event char_interaction.0030

Events it fires: char_interaction.0030

• 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) (14 lines of game script)

is_available = trigger_if = {
	limit = {
		is_ai = yes
	}
	is_dynast = yes
	is_at_war = no
}
is_shown = scope:puppet_or_actor ?= {
	is_dynast = yes
	dynasty ?= scope:recipient.dynasty
}
scope:recipient = {
	has_trait = disinherited
}

As written in game/common/character_interactions/00_dynast_interactions.txt.

Can be sent when (is_valid…) (3 lines of game script)

scope:puppet_or_actor.dynasty = {
	dynasty_prestige >= miniscule_dynasty_prestige_value
}

As written in game/common/character_interactions/00_dynast_interactions.txt.

Effects (on_send, on_accept, on_decline) (31 lines of game script)

on_accept = scope:puppet_or_actor = {
	stress_and_fulfillment_impact = {
		vengeful = minor_stress_impact_gain
		stubborn = minor_stress_impact_gain
	}
	hidden_effect = {
		send_interface_message = {
			type = event_dynasty_neutral
			title = restore_inheritance_interaction_notification
			right_icon = scope:recipient
			show_as_tooltip = {
				scope:recipient = {
					restore_inheritance_effect = yes
				}
			}
		}
	}
}
scope:recipient = {
	restore_inheritance_effect = yes
}
add_clan_unity_interaction_effect = {
	CHARACTER = scope:puppet_or_actor
	TARGET = scope:recipient
	VALUE = minor_unity_gain
	DESC = clan_unity_re_inheritance.desc
	REVERSE_NON_HOUSE_TARGET = no
}
on_auto_accept = scope:recipient = {
	trigger_event = char_interaction.0030
}

As written in game/common/character_interactions/00_dynast_interactions.txt.

Category: Friendly actions
Cost: Renown: varies
In the menu: under More…
ID: restore_inheritance_interaction

Source: game/common/character_interactions/00_dynast_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.