Contract 9.1.0

The consistency pass (Jamie, 2026-09-25): decisions that had reached one tool now reach every tool they apply to, and the war family's old names go.

• A boat defense is not the member's battle: an enemy attacked the boat and the defense deck answered. It leaves battles_performance (and its streak), battles_compare, battles_cards, battles_decks, battles_trends, clans_participation and the timeline's battle sessions; boat attacks stay.
• battles_performance without a mode and battles_compare (which now takes mode) serve modes, the record split by mode family, and a note says the headline pools them.
• battles_trends over the corpus counts recorded players only, like every other metric; a battle-stub player is a ghost entry, never a metric.
• clanMate and unrecognized battle types are casual in every mode group, never ranked or an event.
• Battle deck cards carry form (base, evolution, hero) beside the API's raw evolutionLevel.
• elixir_timeline takes season like every windowed tool, and says where a capped feed stops (timeline_more_to).
• war_current, war_rivals and war_history drop the clan_score and our_clan_score aliases (deprecated since 6.19.0; the names are clan_war_trophies and our_clan_war_trophies), and war_current drops training_today (decks_today.day_kind says it).
• On a personal connection on_behalf_of is ignored and elixir_identify and elixir_my_identities are not listed: they map an agent's other people, and a person is themselves. Omitting clan_tag means your primary player's clan; the brief names the other clans you track.
• elixir_track_player refuses to remove your primary player while you track others (bad_request): make another player primary first. It used to promote one silently.
• rankings_clan_ladder always emits located_elsewhere; clans_standings declares current_streak as the object it is; elixir_collectors says credits follow points.

Additive, with removals that are patches under the agent-facing rule (DECISIONS: majors track domain shifts). The JSON API mirrors none of the removed names and moves to 2.1.0 separately.