From 1183f189ebca6f631b1b749bea05bfb1fd0e19b2 Mon Sep 17 00:00:00 2001
From: maneatingape <44142177+maneatingape@users.noreply.github.com>
Date: Fri, 25 Jul 2025 17:09:53 +0100
Subject: [PATCH 1/2] Add CONTRIBUTING.md

---
 CONTRIBUTING.md | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 CONTRIBUTING.md

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..12f0344
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,39 @@
+# Contributing
+
+I hope that you've enjoyed reading these solutions as much as I enjoyed writing them.
+They're pretty fast and clean...but could you make them even *faster and cleaner*?
+
+If you have thought of an improvement then please
+[open a pull request](https://github.com/maneatingape/advent-of-code-rust/compare).
+Contributions are encouraged and valued. It should generally fall into one of the
+following two categories:
+
+* **Bug Fix** Solutions try to be as general as possible but can't test for every input. Your pull
+  request fixes an incorrect answer for your input or prevents a panic.
+* **Performance Improvement** Your pull request gives a significant (> 10%) performance improvement.
+  This could be achieved by using a better algorithm, better low level optimizations
+  or by applying the portable SIMD library.
+
+## Legal Notice
+
+When contributing to this project, you must agree that you have authored 100% of the content,
+that you have the necessary rights to the content and that the content you contribute
+may be provided under the project licence.
+
+## Guidelines
+
+Pull requests should meet the following baseline standards:
+
+* Commit messages and pull request title are clear and informative.
+* Code style matches the existing code. This one is somewhat subjective but try to "fit in" by
+  using the same naming conventions. Code should be portable, avoiding any architecture
+  specific intrinsics.
+* No performance regressions. Benchmark the new solution versus the original and try to keep it
+  within a ±5% margin of error. Bug fixes have more leniency to reduce performance.
+* Tests should pass.
+* Code is formatted using `rustfmt`.
+* Code is linted using `clippy`.
+
+Formatting and linting can be executed by running [`just`](https://github.com/casey/just)
+(if installed) on the command line at the project root, or alternatively copying and pasting
+the commands from `justfile` into the terminal.

From 2fc1b76c5398f37be07489f276054973842ad86e Mon Sep 17 00:00:00 2001
From: maneatingape <44142177+maneatingape@users.noreply.github.com>
Date: Fri, 25 Jul 2025 17:17:12 +0100
Subject: [PATCH 2/2] Test commit

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index b192087..e3a3882 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+Hello world.
+
 # Advent of Code [![checks-badge]][checks-link] [![docs-badge]][docs-link]
 
 Complete 2024 to 2015 entries written in Rust for the annual [Advent of Code] challenge,