Anders Olsson 044fb83a38 feat(api): add record_winner, record_draw, intern, lookup on History ...

Spec Section 4 "three-tier event ingestion" tier 2: one-off match
convenience. Spec open question 3: expose Index + intern/lookup for
power users.

History and HistoryBuilder gain a 4th generic parameter
K: Eq + Hash + Clone = &'static str. The default ensures existing
tests using Index-based add_events compile unchanged.

History internally owns a KeyTable<K>. intern(&Q) creates or returns
an Index for the given key; lookup(&Q) returns Option<Index> without
creating. record_winner and record_draw are thin 1v1 wrappers around
the internal add_events_with_prior.

Part of T2 of docs/superpowers/specs/2026-04-23-trueskill-engine-redesign-design.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-04-24 12:30:04 +02:00

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