README.md in rubocop-ast-0.0.3 vs README.md in rubocop-ast-0.1.0

@@ -1,15 +1,18 @@
 # RuboCop AST
 
 [![Gem Version](https://badge.fury.io/rb/rubocop-ast.svg)](https://badge.fury.io/rb/rubocop-ast)
 [![CI](https://github.com/rubocop-hq/rubocop-ast/workflows/CI/badge.svg)](https://github.com/rubocop-hq/rubocop-ast/actions?query=workflow%3ACI)
+[![Test Coverage](https://api.codeclimate.com/v1/badges/a29666e6373bc41bc0a9/test_coverage)](https://codeclimate.com/github/rubocop-hq/rubocop-ast/test_coverage)
+[![Maintainability](https://api.codeclimate.com/v1/badges/a29666e6373bc41bc0a9/maintainability)](https://codeclimate.com/github/rubocop-hq/rubocop-ast/maintainability)
 
 Contains the classes needed by [RuboCop](https://github.com/rubocop-hq/rubocop) to deal with Ruby's AST, in particular:
 * `RuboCop::AST::Node`
-* `RuboCop::AST::NodePattern` ([doc](manual/node_pattern.md))
+* `RuboCop::AST::NodePattern` ([doc](docs/modules/ROOT/pages/node_pattern.adoc))
 
-This gem may be used independently from the main RuboCop gem.
+This gem may be used independently from the main RuboCop gem. It was extracted from RuboCop in version 0.84 and its only
+dependency is the `parser` gem, which `rubocop-ast` extends.
 
 ## Installation
 
 Just install the `rubocop-ast` gem
 
@@ -23,10 +26,20 @@
 gem 'rubocop-ast'
 ```
 
 ## Usage
 
-Refer to the documentation of `RuboCop::AST::Node` and [`RuboCop::AST::NodePattern`](manual/node_pattern.md)
+Refer to the documentation of `RuboCop::AST::Node` and [`RuboCop::AST::NodePattern`](docs/modules/ROOT/pages/node_pattern.adoc)
+
+### Parser compatibility switches
+
+The main `RuboCop` gem uses [legacy AST output from parser](https://github.com/whitequark/parser/#usage).
+This gem is meant to be compatible with all settings. For example, to have `-> { ... }` emitted
+as `LambdaNode` instead of `SendNode`:
+
+```ruby
+RuboCop::AST::Builder.emit_lambda = true
+```
 
 ## Contributing
 
 Checkout the [contribution guidelines](CONTRIBUTING.md).