Create CONTRIBUTING.md

Author: Waishnav

CONTRIBUTING.md

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+# Contributing
+
+## Read This First
+
+I'm not actively accepting contributions right now.
+
+You can still open an issue or PR, but please do so knowing there is a high chance I close it, defer it forever, or never look at it.
+
+If that sounds annoying, that is because it is. This project is still early and me and users trying to keep it scoped, quality, and direction under control.
+
+## What I'm Most Likely To Accept
+
+Small, focused bug fixes.
+
+Small reliability fixes.
+
+Small performance improvements.
+
+Tightly scoped maintenance work that clearly improves the project without changing its direction.
+
+## What I Least Likely To Accept
+
+Large PRs.
+
+Drive-by feature work.
+
+Opinionated rewrites.
+
+Anything that expands product scope without discussing it in community or asking for it first.
+
+If you open a 1,000+ line PR full of new features, I will probably close it quickly and remember that you ignored the clearly written instructions.
+
+## If You Still Want To Open A PR
+
+Keep it small.
+
+Explain exactly what changed.
+
+Explain exactly why the change should exist.
+
+Do not mix unrelated fixes together.
+
+If the PR makes anything resembling a UI change, include clear before/after images.
+
+If the change depends on motion, timing, transitions, or interaction details, include a short video.
+
+If I have to guess what changed, I are much less likely to review it.
+
+## Issues First
+
+If you are thinking about a non-trivial change, open an issue first.
+
+That still does not mean I will want the PR, but it gives you a chance to avoid wasting your time.
+
+## Be Realistic
+
+Opening a PR does not create an obligation on our side.
+
+I may close it. I may ignore it. I may ask you to shrink it. I may reimplement the idea ourselves later.
+
+If you are fine with that, proceed.