optional.patch

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1bdc763..fc256d2 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -82,7 +82,7 @@ RED_CANDLE_REAL_INFERENCE=true bundle exec rspec

 **To switch back to working without Red Candle:**
 ```bash
-bundle config set --local without red_candle
+bundle config unset with
 bundle install
 ```

diff --git a/Gemfile b/Gemfile
index 8d54706..0cfcba3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -44,6 +44,6 @@ end

 # Optional group for Red Candle provider (requires Rust toolchain)
 # To include: bundle config set --local with red-candle
-group :red_candle do
+group :red_candle, optional: true do
   gem 'red-candle', '~> 1.2'
 end