docs: add Contributing section

README.md

@@ -99,104 +99,16 @@ classifier.classify("Cheap pills!")  # => "Spam"
 ```ruby
 classifier = Classifier::LogisticRegression.new(:positive, :negative)
 classifier.train(positive: "love amazing great wonderful")
-classifier.train(negative: "hate terrible awful bad")
-classifier.classify("I love it!")  # => "Positive"
-```
-[Logistic Regression Guide →](https://rubyclassifier.com/docs/guides/logisticregression/basics)
-
-### LSI (Latent Semantic Indexing)
-
-```ruby
-lsi = Classifier::LSI.new
-lsi.add(dog: "dog puppy canine bark fetch", cat: "cat kitten feline meow purr")
-lsi.classify("My puppy barks")  # => "dog"
-```
-[LSI Guide →](https://rubyclassifier.com/docs/guides/lsi/basics)
-
-### k-Nearest Neighbors
-
-```ruby
-knn = Classifier::KNN.new(k: 3)
-%w[laptop coding software developer programming].each { |w| knn.add(tech: w) }
-%w[football basketball soccer goal team].each { |w| knn.add(sports: w) }
-knn.classify("programming code")  # => "tech"
-```
-[k-Nearest Neighbors Guide →](https://rubyclassifier.com/docs/guides/knn/basics)
-
-### TF-IDF
-
-```ruby
-tfidf = Classifier::TFIDF.new
-tfidf.fit(["Ruby is great", "Python is great", "Ruby on Rails"])
-tfidf.transform("Ruby programming")  # => {:rubi => 1.0}
-```
-[TF-IDF Guide →](https://rubyclassifier.com/docs/guides/tfidf/basics)
-
-## Key Features
-
-### Incremental LSI
-
-Add documents without rebuilding the entire index—400x faster for streaming data:
-
-```ruby
-lsi = Classifier::LSI.new(incremental: true)
-lsi.add(tech: ["Ruby is elegant", "Python is popular"])
-lsi.build_index
-
-# These use Brand's algorithm—no full rebuild
-lsi.add(tech: "Go is fast")
-lsi.add(tech: "Rust is safe")
-```
-
-[Learn more →](https://rubyclassifier.com/docs/guides/lsi/basics)
-
-### Persistence
-
-```ruby
-classifier.storage = Classifier::Storage::File.new(path: "model.json")
-classifier.save
-
-loaded = Classifier::Bayes.load(storage: classifier.storage)
-```
-
-[Learn more →](https://rubyclassifier.com/docs/guides/persistence/basics)
-
-### Streaming Training
-
-```ruby
-classifier.train_from_stream(:spam, File.open("spam_corpus.txt"))
-```
-
-[Learn more →](https://rubyclassifier.com/docs/tutorials/streaming-training)
-
-## Performance
-
-Native C extension provides 5-50x speedup for LSI operations:
-
-| Documents | Speedup |
-|-----------|---------|
-| 10 | 25x |
-| 20 | 50x |
-
-```bash
-rake benchmark:compare  # Run your own comparison
-```
-
-## Development
-
-```bash
-bundle install
-rake compile  # Build native extension
-rake test     # Run tests
-```
+classifier.train(negative: "hate terrible
 
-## Authors
+## Contributing
 
-- **Lucas Carlson** - lucas@rufy.com
-- **David Fayram II** - dfayram@gmail.com
-- **Cameron McBride** - cameron.mcbride@gmail.com
-- **Ivan Acosta-Rubio** - ivan@softwarecriollo.com
+We welcome contributions! To get started:
+1. Fork the repository and create your feature branch.
+2. Run `bundle install` to install dependencies.
+3. Ensure all tests pass by running `rake test`.
+4. Submit a Pull Request with a clear description of your changes.
 
 ## License
 
-[LGPL 2.1](LICENSE)
+This library is released under the [LGPL-2.1 License](https://opensource.org/licenses/LGPL-2.1).