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Commits
| Author | SHA1 | Message | Date | |
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  logaritmiskandClaude Opus 5
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8e4d6a637d |
fix: reject malformed events at the ingestion boundary
A one-team event reached `run_chain`, which builds one diff link per
adjacent pair of teams, leaving it to index `links[1..]` on an empty
vector. That panicked with "range start index 1 out of range for slice
of length 0" — from `History::add_events`, in a release build, through
entirely safe API.
An empty team was the quieter half of the same gap. It contributes no
performance, so a malformed event converged and handed back a finite,
plausible-looking posterior for whoever it was matched against. That is
this crate's characteristic defect: a public surface reporting a
constant that looks like an answer.
A non-finite score was the third. `converge` did report NonFiniteResult,
so it was detected — but a caller reading `current_skill` before
converging was handed `tau: NaN` with nothing to say so.
`NotEnoughTeams` and `EmptyTeam` already existed. They were checked on
the prediction paths and nowhere else, which is exactly why ingestion
could still manufacture the states they describe. The checks go in
`add_events_with_prior` alongside the tie check, for the same reason
that one is there: every ingestion route lands on it, so `record_winner`,
`record_draw` and `EventBuilder` inherit them rather than each needing
their own.
Also corrects documentation that had been stating the opposite of the
code since
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logaritmiskandClaude Opus 5
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8c087ad015 |
fix!: apply competitor configuration whenever it is supplied
`Member::with_prior` and `with_drift_scale` were consumed only on the branch that *creates* a competitor — `priors.remove` sat inside `if !self.agents.contains(..)`. Supplying either for a key the history already knew did nothing at all: no error, no warning, and output computed from the default prior. A prior applied on a competitor's very first event and was silently discarded ever after. Configuration now applies whenever supplied. Two details this forced: Configuration is tracked per *field* rather than as a merged `Rating`. A member setting only `drift_scale` must not also assert the default prior, or it would silently undo a prior seeded on an earlier event. Slice state has to be refreshed. `drift_scale` is re-derived on every forward pass, but a prior is written into the competitor's earliest slice once, at ingestion, and `iteration` refreshes only slices after the first. Without the refresh a late prior would reach the drift terms and nothing else — a subtler version of the drop being fixed. This was caught by a test, not by reading the code. Conflicting values for one competitor within a single batch are now `ConflictingCompetitorConfig` rather than resolved by iteration order. Events in a batch are unordered, so "last one wins" would make the result depend on traversal — and `tests/ingestion_equivalence.rs` exists to rule exactly that out. Repeating the same value stays inert, which is the shape callers get when configuration is a property of the domain. That invariant turned out to be tested only for *unconfigured* competitors: every helper in that file built members with `Member::new`. Extended to cover configured ones, including a check that configuration changes the fit at all, so the order tests cannot pass vacuously. `with_prior` had no coverage under `tests/` whatsoever, which is how this survived. Adds `tests/competitor_config.rs`. `drift_scale_is_ignored_after_first_appearance` asserted the old behaviour and now asserts the new one. It was written as a deliberate change-detector — "moving the capture would be a visible break, not a silent one" — so it inverted rather than being deleted. Also removes `InferenceError::ConvergenceFailed` and `NegativePrecision`, which no code path ever constructed: public variants advertising failure modes no caller could observe. Partial #20 — its other items were already resolved, except `Outcome::winner` still panicking. BREAKING CHANGE: `prior` and `drift_scale` now take effect for competitors the history already knows, where they were previously ignored; a batch supplying conflicting values for one competitor is now an error. `InferenceError::ConvergenceFailed` and `InferenceError::NegativePrecision` are removed. Closes #10. Refs #20. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011hcFjNDmHXZF8URGLku5zZ |
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logaritmiskandClaude Opus 5
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87fca8dcca |
docs: correct drifted documentation and compile the README in CI
Four README code blocks no longer compiled: `Player` was renamed `Rating`
in T2, the `Drift` trait gained a `T: Time` parameter and a second method,
and two blocks were missing imports outright. The `Rating` example needed
more than a rename — with the binding unused, `T` is ambiguous because
`ConstantDrift` implements `Drift<T>` for every `T`, so it now carries an
explicit annotation.
Nothing compiled those blocks. `src/lib.rs` gains a `cfg(doctest)` struct
carrying `#[doc = include_str!("../README.md")]`, which turns every `rust`
block into a doctest without displacing the curated crate docs as the
front page. Verified it bites: reintroducing `Player` fails the build with
E0432 rather than shipping. Illustrative blocks are fenced `text` — note
that a bare fence defaults to `rust` under rustdoc, which is how the
`variance_delta = elapsed * γ²` formula became a compile error.
Prose fixes: README claimed `Gaussian::forget` takes a square root (it
works in variance space) and pointed at a `.gamma()` builder method that
does not exist. CLAUDE.md's data-flow diagram spliced the public ingestion
shape into the internal one — `Team` is not in that chain — listed
`cdf()`/`erfc()` as public when they are `pub(crate)` and private, and
called `SkillStore` public when only `CompetitorStore` escapes the crate.
Rustdoc fixes: `EventBuilder::scores_with_sigma` claimed a debug-assert
that `Outcome::scores_with_sigma` never had and whose own docs contradict;
rejection happens at ingestion as `InvalidParameter`. `event.rs` described
`add_events_with_prior` as replaced when it is still the ingestion
chokepoint. `factors.rs` advertised `Game::custom` without noting it is
`#[doc(hidden)]`. Internal T2/T4 milestone labels are dropped from public
items; the ones in the private `time_slice` module are left alone.
Closes #35
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014b6wy2q8rnFK8U8GPJVQNU
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logaritmiskandClaude Opus 5
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617bc07f6f |
feat: allow drift to vary per competitor via Member::with_drift_scale
Drift was a property of the History, so every competitor drifted at the same rate and a fixed reference point could not share a graph with moving competitors. A bot at a known strength, a rating floor, a course difficulty — all of them drifted along with the players. Member::with_drift_scale(s) multiplies the drift *variance* a competitor accumulates, so s is in the same units as gamma: ConstantDrift(g) at scale s behaves exactly as ConstantDrift(g * s) would for that competitor. A scalar rather than a per-competitor Drift keeps History's single D type parameter untouched and stays Copy. 0.0 pins a competitor still. The scale lives on Rating, beside the drift it scales, and is applied only through Rating::drift_variance_delta / drift_variance_for_elapsed. Making those the sole entry points means a caller cannot reach the raw drift and silently skip a competitor's scale — the filtered pass was exactly that bug during development, caught because its test was written before the wiring. Like with_prior, the scale is competitor configuration captured at first appearance rather than a per-event override; a competitor that is static is static, and a scale that changed between events would make the skill trajectory hard to interpret. Member's docs claimed prior was a per-event override, which the code has never done — corrected here. A negative scale is rejected rather than squared into its absolute value, and a non-finite one rejected outright, both as InvalidParameter. None means 1.0, so no existing call site changes and no existing fit moves. Adding a public field to Member does break struct-literal construction downstream. Closes #34 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014b6wy2q8rnFK8U8GPJVQNU |
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logaritmiskandClaude Opus 5
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9b2c2b38c8 |
docs: complete the public API documentation contract
Closes the last open item in #25. `cargo clippy -W missing_errors_doc -W missing_panics_doc -W must_use_candidate -W doc_markdown` went from 56 warnings to zero. The 13 hand-written sections name the actual variants each function returns rather than gesturing at "an error". Establishing that meant reading the error paths — `Game::ranked` alone returns four distinct variants, and `record_draw` can hit TieWithoutDrawProbability where `record_winner` provably cannot, since a two-team decisive outcome has nothing to tie. Documenting those as interchangeable would have been worse than leaving them undocumented, because a reader would trust it. Two existing doc comments already described panics in prose but not under a `# Panics` heading, so neither rustdoc nor clippy surfaced them: `Outcome::winner` and `EventBuilder::weights`. Both now carry the heading, and `Outcome::winner` gained the note that it ties every loser, so `n >= 3` needs a positive p_draw — the crate's easiest error to hit by accident. The 43 mechanical fixes (31 `#[must_use]` on pure accessors, 11 missing backticks) were applied with `cargo clippy --fix`. `#[must_use]` on Gaussian's arithmetic and on `posteriors()` matters: discarding those results is always a bug, and until now nothing said so. Also documented why `[profile.release] debug = true` exists — cargo-flamegraph needs the symbols, and library profile settings are ignored downstream, so it reads as an oversight without the note. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01T5SYDExxL4vZgvunrcNSMc |
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logaritmisk
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d2aab82c1e |
T0 + T1 + T2: engine redesign through new API surface (#1)
Implements tiers T0, T1, T2 of `docs/superpowers/specs/2026-04-23-trueskill-engine-redesign-design.md`. All three tiers have landed together on this branch because they build on one another; this PR rolls them up for a single review pass. Per-tier plans: - T0: `docs/superpowers/plans/2026-04-23-t0-numerical-parity.md` - T1: `docs/superpowers/plans/2026-04-24-t1-factor-graph.md` - T2: `docs/superpowers/plans/2026-04-24-t2-new-api-surface.md` ## Summary ### T0 — Numerical parity (internal) - `Gaussian` switched to natural-parameter storage `(pi, tau)`; mul/div now ~7× faster (218 ps vs 1.57 ns). - `HashMap<Index, _>` → dense `Vec<_>` keyed by `Index.0` (via `AgentStore<D>`, `SkillStore`). - `ScratchArena` eliminates per-event allocations in `Game::likelihoods`. - `InferenceError` seed type added (1 variant). - 38 → 53 tests passing through T1. - Benchmark: `Batch::iteration` 29.84 → 21.25 µs. ### T1 — Factor graph machinery (internal) - `Factor` trait + `BuiltinFactor` enum (TeamSum / RankDiff / Trunc) driving within-game inference. - `VarStore` flat storage for variable marginals. - `Schedule` trait + `EpsilonOrMax` impl replacing the hand-rolled EP loop. - `Game::likelihoods` rebuilt on the factor-graph machinery; iteration counts and goldens preserved to within 1e-6. - 53 tests passing. - Benchmark: `Batch::iteration` 23.01 µs (slight regression absorbed in T2). ### T2 — New API surface (breaking) **Renames:** - `IndexMap → KeyTable`, `Player → Rating`, `Agent → Competitor`, `Batch → TimeSlice` **New types:** - `Time` trait with `Untimed` ZST and `i64` impls; `Drift<T>`, `Rating<T, D>`, `Competitor<T, D>`, `TimeSlice<T>`, `History<T, D, O, K>` all generic. - `Event<T, K>`, `Team<K>`, `Member<K>`, `Outcome` (`Ranked` variant; `#[non_exhaustive]`). - `Observer<T>` trait + `NullObserver`. - `ConvergenceOptions`, `ConvergenceReport`. - `GameOptions`, `OwnedGame<T, D>`. **Three-tier ingestion:** - `history.record_winner(&K, &K, T)` / `record_draw(&K, &K, T)` — 1v1 convenience. - `history.add_events(iter)` — typed bulk. - `history.event(T).team([...]).weights([...]).ranking([...]).commit()` — fluent. **Query API:** `current_skill`, `learning_curve`, `learning_curves` (keyed on `K`), `log_evidence`, `log_evidence_for`, `predict_quality`, `predict_outcome`. **Game constructors:** `ranked`, `one_v_one`, `free_for_all`, `custom` — all returning `Result<_, InferenceError>`. **`factors` module:** `Factor`, `Schedule`, `VarStore`, `VarId`, `BuiltinFactor`, `EpsilonOrMax`, `ScheduleReport`, `TeamSumFactor`, `RankDiffFactor`, `TruncFactor` now public. **Errors:** `InferenceError` gains `MismatchedShape`, `InvalidProbability`, `ConvergenceFailed`; boundary panics converted to `Result`. **Removed (breaking):** `History::convergence(iters, eps, verbose)`, `HistoryBuilder::gamma(f64)`, `HistoryBuilder::time(bool)`, `History.time: bool`, `learning_curves_by_index`, nested-Vec public `add_events`. ## Behavior change (documented in CHANGELOG) `Time = Untimed` has `elapsed_to → 0`, so no drift accumulates between slices. The old `time=false` mode implicitly forced `elapsed=1` on reappearance via an `i64::MAX` sentinel — that quirk is not reproducible under a typed time axis. Tests that depended on it now use `History::<i64, _>` with explicit `1..=n` timestamps. One test (`test_env_ttt`) had 3 Gaussian goldens updated to reflect the corrected semantics; documented in commit `33a7d90`. ## Final numbers | Metric | Before T0 | After T2 | Delta | |---|---|---|---| | `Batch::iteration` | 29.84 µs | 21.36 µs | **-28%** | | `Gaussian::mul` | 1.57 ns | 219 ps | **-86%** | | `Gaussian::div` | 1.57 ns | 219 ps | **-86%** | | Tests passing | 38 | 90 | +52 | All other Gaussian ops unchanged (~219 ps add/sub, ~264 ps pi/tau reads). ## Test plan - [x] `cargo test --features approx` — 90/90 pass (68 lib + 10 api_shape + 6 game + 4 record_winner + 2 equivalence) - [x] `cargo clippy --all-targets --features approx -- -D warnings` — clean - [x] `cargo +nightly fmt --check` — clean - [x] `cargo bench --bench batch` — 21.36 µs - [x] `cargo bench --bench gaussian` — unchanged from T1 - [x] `cargo run --example atp --features approx` — rewritten in new API, runs clean - [x] Historical Game-level goldens preserved in `tests/equivalence.rs` - [x] Public API matches spec Section 4 (verified by integration tests in `tests/api_shape.rs`) ## Commit history ~45 commits total across T0 + T1 + T2. Each task is self-contained and individually tested; the branch is bisectable. See `git log main..t2-new-api-surface` for the full list. ## Deferred to later tiers - `Outcome::Scored` + `MarginFactor` — T4 - `Damped` / `Residual` schedules — T4 - `Send + Sync` bounds + Rayon parallelism — T3 - N-team `predict_outcome` — T4 - `Game::custom` full ergonomics — T4 🤖 Generated with [Claude Code](https://claude.com/claude-code) Reviewed-on: #1 Co-authored-by: Anders Olsson <anders.e.olsson@gmail.com> Co-committed-by: Anders Olsson <anders.e.olsson@gmail.com> |