Drift now takes &T -> &T and is generic over the time axis. Untimed
impls return elapsed=0. ConstantDrift impl covers all T via the Time
trait. An additional variance_for_elapsed(i64) method on the trait
serves callers that work with the pre-cached i64 elapsed count.
Competitor.last_time moves from i64 with MIN sentinel to Option<T>
with None sentinel. receive(&T) computes variance from last_time
dynamically; receive_for_elapsed(i64) uses a pre-cached elapsed count
(needed in convergence sweeps where last_time has already advanced).
TimeSlice.time changes from i64 to T. compute_elapsed is now generic
over T and takes Option<&T> for the last-seen time. new_forward_info
uses receive_for_elapsed to preserve the cached elapsed during sweeps.
History<D> becomes History<T, D>; HistoryBuilder<D> becomes
HistoryBuilder<T, D>; Game<D> becomes Game<T, D>. Defaults keep
existing call sites compiling with zero changes: T = i64,
D = ConstantDrift.
add_events / add_events_with_prior stay on impl History<i64, D> since
times: Vec<i64> is i64-specific (Task 8 will generalise this).
In !self.time mode the old i64::MAX sentinel guaranteed elapsed=1 for
every slice transition regardless of time gaps. Replaced by advancing
all previously-seen agents' last_time to Some(current_slice_time) at
the end of each slice; this preserves elapsed=1 between adjacent
slices in sequential-integer untimed mode.
The time: bool field on History and .time(bool) on HistoryBuilder are
NOT removed by this task — deferred to Task 8 so this commit is
purely a type-level generification.
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>
TimeSlice says what it is: every event sharing one timestamp. The
History field .batches is renamed to .time_slices. Local variables
named `batch` referring to TimeSlice instances are renamed to
`time_slice`.
Part of T2 of docs/superpowers/specs/2026-04-23-trueskill-engine-redesign-design.md.
Competitor holds dynamic per-history state (message, last_time) for
someone competing; its configuration lives in a Rating.
AgentStore renamed to CompetitorStore to match. The internal
`clean()` free function's parameter name changed from `agents` to
`competitors` for consistency.
Local variable names (agent_idx, this_agent) inside history.rs are
left unchanged — they represent abstract identifiers, not Competitor
instances.
Part of T2 of docs/superpowers/specs/2026-04-23-trueskill-engine-redesign-design.md.
The struct holds prior/beta/drift — a rating configuration, not a
person. The person-with-temporal-state is the Competitor (renamed in
the next task). Resolves Player/Agent ambiguity.
Part of T2 of docs/superpowers/specs/2026-04-23-trueskill-engine-redesign-design.md.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Address code review feedback from Task 2:
- key_table module doesn't need pub visibility; the KeyTable re-export
at lib.rs root already exposes the only public type. Matches the
error/history private-module pattern.
- Revert an incidental bench variable rename (index_map → index) that
wasn't part of the task scope.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The former name collided with the popular indexmap crate. KeyTable
lives in its own module. Public API unchanged beyond the rename.
Part of T2 of docs/superpowers/specs/2026-04-23-trueskill-engine-redesign-design.md.
AgentStore<D> is a Vec<Option<Agent<D>>>-backed store indexed directly
by Index.0, eliminating per-iteration hashing in the cross-history
forward/backward sweep. Implements Index<Index>/IndexMut<Index> for
ergonomic agent access.
AgentStore is public (so benches/batch.rs can use it). SkillStore
remains pub(crate) since Skill is pub(crate) in batch.rs.
HashMap<Index, _> is now only used for the posteriors() return value
(temporary; will be replaced in T2 with a proper typed return) and
for the add_events_with_prior(priors: HashMap<Index, Player<D>>) API
(also T2 target).
Part of T0 engine redesign.
