https://github.com/wesnoth/wesnoth/blob/master/data/schema/units/types.cfg
Some need to be fixed, should rerun with master.
wesnoth --validate-addon Ageless_Era
error validation: Extra tag [filter]; there may only be 1 [filter] in [event]
error validation: Extra tag [filter_second]; there may only be 1 [filter_second] in [event]
error validation: Extra tag [specials]; there may only be 1 [specials] in [attack]
error validation: Invalid key 'active_on=' in tag [*]
error validation: Invalid key 'acuracy=' in tag [attack]
error validation: Invalid key 'affect=' in tag [damage]
error validation: Invalid key 'affect_self=' in tag [chance_to_hit]
error validation: Invalid key 'affect_self=' in tag [damage]
error validation: Invalid key 'apply_to=' in tag [*]
error validation: Invalid key 'attack_sound_frame=' in tag [attack_anim]
error validation: Invalid key 'attack_sound_start_time=' in tag [frame]
error validation: Invalid key 'attack_sound_time=' in tag [attack_anim]
error validation: Invalid key 'bduration=' in tag [*_frame]
error validation: Invalid key 'circle_time=' in tag [resistance_anim]
error validation: Invalid key 'color=' in tag [heals]
error validation: Invalid key 'cycles=' in tag [standing_anim]
error validation: Invalid key 'direction=' in tag [filter_attack]
error validation: Invalid key 'female_name=' in tag [*]
error validation: Invalid key 'female_name=' in tag [damage]
error validation: Invalid key 'female_name_inactive=' in tag [chance_to_hit]
error validation: Invalid key 'find_vacant=' in tag [unit]
error validation: Invalid key 'full_heal=' in tag [effect]
error validation: Invalid key 'halo=' in tag [remove_item]
error validation: Invalid key 'hit=' in tag [else]
error validation: Invalid key 'id=' in tag [set_specials]
error validation: Invalid key 'id=' in tag [variation]
error validation: Invalid key 'ignore_global_traits=' in tag [unit_type]
error validation: Invalid key 'ignore_passability=' in tag [teleport]
error validation: Invalid key 'immediate=' in tag [get_global_variable]
error validation: Invalid key 'is_enemy=' in tag [affect_adjacent]
error validation: Invalid key 'is_enemy=' in tag [filter]
error validation: Invalid key 'mage_diagonal=' in tag [*_frame]
error validation: Invalid key 'mode=' in tag [store_locations]
error validation: Invalid key 'movement_type=' in tag [filter]
error validation: Invalid key 'name=' in tag [advancement]
error validation: Invalid key 'path=' in tag [textdomain]
error validation: Invalid key 'range=' in tag [defend]
error validation: Invalid key 'side=' in tag [store_unit]
error validation: Invalid key 'sounds=' in tag [frame]
error validation: Invalid key 'start=' in tag [*_frame]
error validation: Invalid key 'start=' in tag [attack_anim]
error validation: Invalid key 'start_anim=' in tag [leading_anim]
error validation: Invalid key 'start_frame=' in tag [defend]
error validation: Invalid key 'start_missile_frame=' in tag [attack_anim]
error validation: Invalid key 'team_name=' in tag [attack]
error validation: Invalid key 'terrain=' in tag [attack_anim]
error validation: Invalid key 'terrain=' in tag [death]
error validation: Invalid key 'terrain=' in tag [defend]
error validation: Invalid key 'terrain=' in tag [movement_anim]
error validation: Invalid key 'time=' in tag [effect]
error validation: Invalid key 'upkeep=' in tag [unit_type]
error validation: Invalid key 'value=' in tag [*]
error validation: Invalid key 'variation_name=' in tag [unit_type]
error validation: Invalid value ' ' in key 'description=' in tag [race]
error validation: Invalid value '$drone.attack[0].damage' in key 'damage=' in tag [effect]
error validation: Invalid value '$drone.attack[0].number' in key 'number=' in tag [effect]
error validation: Invalid value '$second_unit.alignment' in key 'alignment=' in tag [harm_unit]
error validation: Invalid value '$second_unit.facing' in key 'adjacent=' in tag [filter_adjacent_location]
error validation: Invalid value '$unit.alignment' in key 'alignment=' in tag [harm_unit]
error validation: Invalid value '' in key 'deep_water=' in tag [movement_costs]
error validation: Invalid value '' in key 'usage=' in tag [unit_type]
error validation: Invalid value '-$knockback_direction' in key 'adjacent=' in tag [filter_adjacent_location]
error validation: Invalid value '-$pierce_direction' in key 'adjacent=' in tag [filter_adjacent_location]
error validation: Invalid value '-$unit.facing' in key 'adjacent=' in tag [filter_adjacent_location]
error validation: Invalid value 'Better Guards' in key 'description=' in tag [advancement]
error validation: Invalid value 'Darker Magic' in key 'description=' in tag [advancement]
error validation: Invalid value 'Fighter' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'Frost' in key 'name=' in tag [attack]
error validation: Invalid value 'Hide in the Forest' in key 'description=' in tag [advancement]
error validation: Invalid value 'Hunting Spear' in key 'name=' in tag [attack]
error validation: Invalid value 'Inspire others' in key 'description=' in tag [advancement]
error validation: Invalid value 'Kusari' in key 'name=' in tag [attack]
error validation: Invalid value 'Laela the Snow Dragon' in key 'name=' in tag [filter]
error validation: Invalid value 'Laela' in key 'name=' in tag [filter]
error validation: Invalid value 'Laela' in key 'name=' in tag [or]
error validation: Invalid value 'Life draining sword' in key 'description=' in tag [advancement]
error validation: Invalid value 'Ravana the Night Dragon' in key 'name=' in tag [filter]
error validation: Invalid value 'Ravana' in key 'name=' in tag [filter]
error validation: Invalid value 'Ravens steal life' in key 'description=' in tag [advancement]
error validation: Invalid value 'Staff' in key 'name=' in tag [attack]
error validation: Invalid value 'Stronger Spells' in key 'description=' in tag [advancement]
error validation: Invalid value 'Stronger bow' in key 'description=' in tag [advancement]
error validation: Invalid value 'Summon Burning Lich (29 Gold)' in key 'description=' in tag [set_menu_item]
error validation: Invalid value 'Summon burning Lich' in key 'name=' in tag [*]
error validation: Invalid value 'Sword' in key 'name=' in tag [attack]
error validation: Invalid value 'Teleport between villages' in key 'description=' in tag [advancement]
error validation: Invalid value 'Trapped!' in key 'alert=' in tag [hides]
error validation: Invalid value '_ram' in key 'description=' in tag [attack]
error validation: Invalid value 'a stronger mage' in key 'description=' in tag [advancement]
error validation: Invalid value 'alternate' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'aspect of the hunter' in key 'name=' in tag [*]
error validation: Invalid value 'aura of darkness' in key 'name=' in tag [illuminates]
error validation: Invalid value 'better bow' in key 'description=' in tag [advancement]
error validation: Invalid value 'better swordsman' in key 'description=' in tag [advancement]
error validation: Invalid value 'bug 3827 workaround' in key 'name=' in tag [unit_type]
error validation: Invalid value 'ceiling' in key 'round=' in tag [set_variable]
error validation: Invalid value 'darkarcher' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'defender' in key 'animate=' in tag [harm_unit]
error validation: Invalid value 'dragonstaff' in key 'description=' in tag [attack]
error validation: Invalid value 'fish' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'halo' in key 'name=' in tag [leadership]
error validation: Invalid value 'harder bite' in key 'description=' in tag [advancement]
error validation: Invalid value 'heavier club' in key 'description=' in tag [advancement]
error validation: Invalid value 'hire a shipmechanic' in key 'description=' in tag [advancement]
error validation: Invalid value 'hit more often' in key 'description=' in tag [advancement]
error validation: Invalid value 'hit,miss,!,kill' in key 'hits=' in tag [attack_anim]
error validation: Invalid value 'hooded' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'hotter oil' in key 'description=' in tag [advancement]
error validation: Invalid value 'hungrier' in key 'description=' in tag [advancement]
error validation: Invalid value 'is_guard' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'larger crew' in key 'description=' in tag [advancement]
error validation: Invalid value 'lead ammunition' in key 'description=' in tag [advancement]
error validation: Invalid value 'light aura' in key 'name=' in tag [illuminates]
error validation: Invalid value 'mage' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'magical fireballs' in key 'description=' in tag [advancement]
error validation: Invalid value 'marksman' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'mixed Fighter' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'mixed warrior' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'mixed-fighter' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'mixed_fighter' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'more ballistas' in key 'description=' in tag [advancement]
error validation: Invalid value 'more bolas' in key 'description=' in tag [advancement]
error validation: Invalid value 'more darts' in key 'description=' in tag [advancement]
error validation: Invalid value 'more knives' in key 'description=' in tag [advancement]
error validation: Invalid value 'more powerful voice' in key 'description=' in tag [advancement]
error validation: Invalid value 'more umph' in key 'description=' in tag [advancement]
error validation: Invalid value 'mount/dismount' in key 'name=' in tag [*]
error validation: Invalid value 'pathfinder' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'range' in key 'name=' in tag [*]
error validation: Invalid value 'red' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'regenerates +10' in key 'name=' in tag [regenerate]
error validation: Invalid value 'regenerates +12' in key 'name=' in tag [regenerate]
error validation: Invalid value 'regenerates +2' in key 'name=' in tag [regenerate]
error validation: Invalid value 'regenerates +4' in key 'name=' in tag [regenerate]
error validation: Invalid value 'regenerates +5' in key 'name=' in tag [regenerate]
error validation: Invalid value 'regenerates +6' in key 'name=' in tag [regenerate]
error validation: Invalid value 'regenerates +8' in key 'name=' in tag [regenerate]
error validation: Invalid value 'regenerates +9' in key 'name=' in tag [regenerate]
error validation: Invalid value 'self repair' in key 'name=' in tag [*]
error validation: Invalid value 'sell the trophies' in key 'description=' in tag [advancement]
error validation: Invalid value 'shadow aura' in key 'name=' in tag [illuminates]
error validation: Invalid value 'sharper bones' in key 'description=' in tag [advancement]
error validation: Invalid value 'sharper claws' in key 'description=' in tag [advancement]
error validation: Invalid value 'shifter_bear' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'shifter_beaver' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'shifter_goat' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'shifter_human' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'shifter_warthog' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'shifter_wolf' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'ship' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'special' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'stealthier' in key 'description=' in tag [advancement]
error validation: Invalid value 'strike faster' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger Ballista' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger ballista' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger bow' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger catapult' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger crew' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger magic' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger ram' in key 'description=' in tag [advancement]
error validation: Invalid value 'stronger tail' in key 'description=' in tag [advancement]
error validation: Invalid value 'surface' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'tank' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'unhooded' in key 'variation_name=' in tag [variation]
error validation: Invalid value 'unpoison self' in key 'description=' in tag [advancement]
error validation: Invalid value 'upgraded blades' in key 'description=' in tag [advancement]
error validation: Invalid value 'warrior' in key 'usage=' in tag [unit_type]
error validation: Invalid value 'wild rabbit' in key 'description=' in tag [advancement]
error validation: Invalid value 'zombie-serpent' in key 'usage=' in tag [unit_type]
error validation: Missing key 'apply_to=' in tag [animation]
error validation: Tag [and] may not be used in [affect_adjacent]
error validation: Tag [chance_to_hit] may not be used in [attack]
error validation: Tag [else] may not be used in [frame]
error validation: Tag [event] may not be used in [effect]
error validation: Tag [filter] may not be used in [remove_object]
error validation: Tag [filter_attack] may not be used in [attack]
error validation: Tag [filter_location] may not be used in [idle_anim]
error validation: Tag [filter_location] may not be used in [regenerate]
error validation: Tag [filter_weapon] may not be used in [chance_to_hit]
error validation: Tag [frame] may not be used in [defense]
error validation: Tag [frame] may not be used in [frame]
error validation: Tag [if] may not be used in [frame]
error validation: Tag [levelin_anim] may not be used in [unit_type]
error validation: Tag [levelin_anim] may not be used in [variation]
error validation: Tag [levelout_anim] may not be used in [unit_type]
error validation: Tag [levelout_anim] may not be used in [variation]
error validation: Tag [missile_frame] may not be used in [defense]
error validation: Tag [movement] may not be used in [unit_type]
error validation: Tag [movetype] may not be used in [unit_type]
error validation: Tag [not] may not be used in [affect_adjacent]
error validation: Tag [not] may not be used in [movement_anim]
error validation: Tag [not] may not be used in [standing_anim]
error validation: Tag [portrait] may not be used in [female]
error validation: Tag [portrait] may not be used in [unit_type]
error validation: Tag [resistance] may not be used in [race]
error validation: Tag [rune_frame] may not be used in [defense]
error validation: Tag [second_unit] may not be used in [kill]
error validation: Tag [sound] may not be used in [attack_anim]
error validation: Tag [special] may not be used in [attack]
error validation: Tag [special_note] may not be used in [race]
error validation: Tag [specials] may not be used in [unit_type]
error validation: Tag [teleport_anim] may not be used in [unit_type]
https://github.com/wesnoth/wesnoth/blob/master/data/schema/units/types.cfg
Some need to be fixed, should rerun with master.
wesnoth --validate-addon Ageless_Era