chore(openfeature): pin mixpanel-ruby ~> 3.3 for fallback_reason (SDK-126)

openfeature-provider/CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## openfeature/v0.2.0
+
+- Dispatch on `SelectedVariant#fallback_reason` so `MISSING_CONTEXT_KEY`,
+  `NO_ROLLOUT_MATCH`, and `BACKEND_ERROR` map to distinct OpenFeature
+  responses instead of every fallback collapsing to `FLAG_NOT_FOUND`.
+  Requires `mixpanel-ruby >= 3.3.0`.
+
 ## [openfeature/v0.1.0](https://github.com/mixpanel/mixpanel-ruby/tree/openfeature/v0.1.0) (2026-05-13)
 
 Initial release of the Mixpanel OpenFeature provider for Ruby.

openfeature-provider/lib/mixpanel/openfeature/version.rb

@@ -2,6 +2,6 @@
 
 module Mixpanel
   module OpenFeature
-    VERSION = '0.1.0'
+    VERSION = '0.2.0'
   end
 end

openfeature-provider/mixpanel-ruby-openfeature.gemspec

@@ -17,7 +17,14 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_runtime_dependency 'openfeature-sdk', '~> 0.5'
-  spec.add_runtime_dependency 'mixpanel-ruby', '~> 3.1'
+  # SDK-126: pinned to `~> 3.3` because the wrapper's provider.rb calls
+  # `SelectedVariant#fallback_reason`, which was introduced in the
+  # SDK-79 merge and will ship in the next mixpanel-ruby release
+  # (3.3.0). Any earlier 3.x release lacks that method and would raise
+  # NoMethodError on every evaluation. Do NOT loosen this constraint
+  # unless the mixpanel-ruby version being permitted also exposes
+  # fallback_reason.
+  spec.add_runtime_dependency 'mixpanel-ruby', '~> 3.3'
 
   spec.add_development_dependency 'rspec', '~> 3.0'
   spec.add_development_dependency 'simplecov'