style: cargo fmt

.gitignore

@@ -4,3 +4,6 @@
 /temp
 .justfile
 *.svg
+NOTEPAD.md
+
+/.claude

Cargo.toml

@@ -10,6 +10,10 @@ bench = false
 name = "batch"
 harness = false
 
+[[bench]]
+name = "gaussian"
+harness = false
+
 [dependencies]
 approx = { version = "0.5.1", optional = true }
 

NOTEPAD.md

@@ -1,16 +0,0 @@
-# History
-
-```rust
-let mut history = History::new();
-
-let agent_a = history.new_agent();
-let agent_b = history.new_agent_with_prior(Prior::new(Gaussian::default(), BETA, GAMMA));
-```
-
-```rust
-trait Team {
-    fn players(&self) -> impl Iterator<Item = P>;
-    fn weights(&self) -> impl Iterator<Item = f64>;
-    fn score(&self) -> u16;
-}
-```

benches/gaussian.rs

@@ -0,0 +1,50 @@
+use criterion::{Criterion, criterion_group, criterion_main};
+use trueskill_tt::gaussian::Gaussian;
+
+fn benchmark_gaussian_arithmetic(criterion: &mut Criterion) {
+    // Define test Gaussians
+    let g1 = Gaussian::from_ms(25.0, 25.0 / 3.0);
+    let g2 = Gaussian::from_ms(0.0, 1.0);
+    let g3 = Gaussian::from_ms(1.0, 1.0);
+
+    // Benchmark addition
+    criterion.bench_function("Gaussian::add", |bencher| {
+        bencher.iter(|| g1 + g2);
+    });
+
+    // Benchmark subtraction
+    criterion.bench_function("Gaussian::sub", |bencher| {
+        bencher.iter(|| g1 - g3);
+    });
+
+    // Benchmark multiplication
+    criterion.bench_function("Gaussian::mul", |bencher| {
+        bencher.iter(|| g1 * g2);
+    });
+
+    // Benchmark division
+    criterion.bench_function("Gaussian::div", |bencher| {
+        bencher.iter(|| g1 / g2);
+    });
+
+    // Benchmark natural parameter conversions
+    criterion.bench_function("Gaussian::pi", |bencher| {
+        bencher.iter(|| g1.pi());
+    });
+
+    criterion.bench_function("Gaussian::tau", |bencher| {
+        bencher.iter(|| g1.tau());
+    });
+
+    // Benchmark combined pi/tau operations (used in mul/div)
+    criterion.bench_function("Gaussian::pi_tau_combined", |bencher| {
+        bencher.iter(|| {
+            let pi = g1.pi();
+            let tau = g1.tau();
+            (pi, tau)
+        });
+    });
+}
+
+criterion_group!(benches, benchmark_gaussian_arithmetic);
+criterion_main!(benches);

cliff.toml

@@ -0,0 +1,65 @@
+# git-cliff ~ configuration file
+# https://git-cliff.org/docs/configuration
+
+[changelog]
+# A Tera template to be rendered as the changelog's header.
+# See https://keats.github.io/tera/docs/#introduction
+header = """
+# Changelog\n
+All notable changes to this project will be documented in this file.\n
+"""
+# A Tera template to be rendered for each release in the changelog.
+# See https://keats.github.io/tera/docs/#introduction
+body = """
+{% if version %}\
+    ## {{ version | trim_start_matches(pat="v") }} - {{ timestamp | date(format="%Y-%m-%d") }}
+{% else %}\
+    ## Unreleased
+{% endif %}\
+{% for group, commits in commits | group_by(attribute="group") %}
+    ### {{ group | upper_first }}
+    {% for commit in commits %}
+        - {{ commit.message | split(pat="\n") | first | trim_end }}\
+    {% endfor %}
+{% endfor %}\n
+"""
+# A Tera template to be rendered as the changelog's footer.
+# See https://keats.github.io/tera/docs/#introduction
+footer = """
+<!-- generated by git-cliff -->
+"""
+# Remove leading and trailing whitespaces from the changelog's body.
+trim = true
+
+
+[git]
+# Parse commits according to the conventional commits specification.
+# See https://www.conventionalcommits.org
+conventional_commits = false
+# Exclude commits that do not match the conventional commits specification.
+filter_unconventional = false
+# Split commits on newlines, treating each line as an individual commit.
+split_commits = false
+# An array of regex based parsers for extracting data from the commit message.
+# Assigns commits to groups.
+# Optionally sets the commit's scope and can decide to exclude commits from further processing.
+commit_parsers = [
+    { message = "^feat", group = "Features" },
+    { message = "^fix", group = "Bug Fixes" },
+    { message = "^doc", group = "Documentation" },
+    { message = "^perf", group = "Performance" },
+    { message = "^refactor", group = "Refactor" },
+    { message = "^style", group = "Styling" },
+    { message = "^test", group = "Testing" },
+    { message = "^chore\\(release\\): prepare for", skip = true },
+    { message = "^chore", group = "Miscellaneous Tasks" },
+    { body = ".*security", group = "Security" },
+    { body = ".*", group = "Other (unconventional)" },
+]
+# Exclude commits that are not matched by any commit parser.
+filter_commits = false
+# Order releases topologically instead of chronologically.
+topo_order = false
+# Order of commits in each group/release within the changelog.
+# Allowed values: newest, oldest
+sort_commits = "oldest"

examples/atp.rs

@@ -159,10 +159,12 @@ fn main() {
 }
 
 mod csv {
-    use std::fs::File;
+    use std::{
-    use std::io::{self, BufRead, BufReader, Lines};
+        fs::File,
-    use std::ops;
+        io::{self, BufRead, BufReader, Lines},
-    use std::path::Path;
+        ops,
+        path::Path,
+    };
 
     pub struct Reader {
         header_map: Vec<String>,

release.toml

@@ -0,0 +1 @@
+pre-release-hook = ["git", "cliff", "-o", "CHANGELOG.md", "--tag", "{{version}}"]

rustfmt.toml

@@ -0,0 +1,2 @@
+imports_granularity = "Crate"
+group_imports = "StdExternalCrate"

src/batch.rs

@@ -391,9 +391,8 @@ pub(crate) fn compute_elapsed(last_time: i64, actual_time: i64) -> i64 {
 mod tests {
     use approx::assert_ulps_eq;
 
-    use crate::{IndexMap, agent::Agent, drift::ConstantDrift, player::Player};
-
     use super::*;
+    use crate::{IndexMap, agent::Agent, drift::ConstantDrift, player::Player};
 
     #[test]
     fn test_one_event_each() {

src/game.rs

@@ -203,9 +203,8 @@ impl<'a, D: Drift> Game<'a, D> {
 mod tests {
     use ::approx::assert_ulps_eq;
 
-    use crate::{ConstantDrift, GAMMA, Gaussian, N_INF, Player};
-
     use super::*;
+    use crate::{ConstantDrift, GAMMA, Gaussian, N_INF, Player};
 
     #[test]
     fn test_1vs1() {

src/history.rs

@@ -433,9 +433,8 @@ impl<D: Drift> History<D> {
 mod tests {
     use approx::assert_ulps_eq;
 
-    use crate::{ConstantDrift, EPSILON, Game, Gaussian, ITERATIONS, IndexMap, P_DRAW, Player};
-
     use super::*;
+    use crate::{ConstantDrift, EPSILON, Game, Gaussian, ITERATIONS, IndexMap, P_DRAW, Player};
 
     #[test]
     fn test_init() {

src/lib.rs

@@ -1,8 +1,10 @@
-use std::borrow::{Borrow, ToOwned};
+use std::{
-use std::cmp::Reverse;
+    borrow::{Borrow, ToOwned},
-use std::collections::HashMap;
+    cmp::Reverse,
-use std::f64::consts::{FRAC_1_SQRT_2, FRAC_2_SQRT_PI, SQRT_2};
+    collections::HashMap,
-use std::hash::Hash;
+    f64::consts::{FRAC_1_SQRT_2, FRAC_2_SQRT_PI, SQRT_2},
+    hash::Hash,
+};
 
 pub mod agent;
 #[cfg(feature = "approx")]