Remove Skylight — replaced by Sentry

Drops the :skylight gem group (skylight, rbtrace, webrick), the probe
configuration in application.rb, and the RAILS_GROUPS env var in
fly.toml that opted the production container into the group.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nbudin

Gemfile

@@ -114,13 +114,6 @@ gem "rollbar"
 # Reduces boot times through caching; required in config/boot.rb
 gem "bootsnap", ">= 1.1.0", require: false
 
-# Production profiling
-group :skylight do
-  gem "rbtrace"
-  gem "skylight"
-  gem "webrick" # we don't actually use it, but Skylight needs it on boot
-end
-
 group :development do
   gem "rack-mini-profiler", require: false
 

Gemfile.lock

@@ -415,7 +415,6 @@ GEM
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
     openssl (4.0.2)
-    optimist (3.1.0)
     orm_adapter (0.5.0)
     ostruct (0.6.3)
     parallel (2.1.0)
@@ -511,10 +510,6 @@ GEM
     rbs (3.10.4)
       logger
       tsort
-    rbtrace (0.5.3)
-      ffi (>= 1.0.6)
-      msgpack (>= 0.4.3)
-      optimist (>= 3.0.0)
     rbtree (0.4.6)
     rdoc (7.2.0)
       erb
@@ -603,8 +598,6 @@ GEM
     simplecov-html (0.13.2)
     simplecov_json_formatter (0.1.4)
     simpleidn (0.2.3)
-    skylight (7.1.1)
-      activesupport (>= 7.2.0)
     slop (3.6.0)
     sorted_set (1.1.0)
       rbtree
@@ -751,7 +744,6 @@ DEPENDENCIES
   rack-mini-profiler
   rails (= 8.1.3)
   rails-controller-testing
-  rbtrace
   readline (~> 0.0.4)
   recaptcha
   redcarpet
@@ -770,7 +762,6 @@ DEPENDENCIES
   shoryuken
   simplecov
   simplecov-cobertura
-  skylight
   sprockets-rails
   stackprof
   stripe
@@ -780,7 +771,6 @@ DEPENDENCIES
   twilio-ruby (~> 7.10.0)
   typeprof
   tzinfo-data
-  webrick
   will_paginate
   with_advisory_lock
   yard

config/application.rb

@@ -35,9 +35,7 @@ class Application < Rails::Application
     config.middleware.insert_after ActionDispatch::Executor, Intercode::FindVirtualHost
     config.middleware.use Rack::Deflater
 
-    config.skylight.probes += %w[active_job graphql] if config.respond_to?(:skylight)
-
-    # To enable tsvectors and triggers; hopefully can get rid of this at some point :(
+# To enable tsvectors and triggers; hopefully can get rid of this at some point :(
     config.active_record.schema_format = :sql
 
     config.generators do |g|

fly.toml

@@ -22,7 +22,6 @@ JSON_LOGGING = "1"
 MALLOC_ARENA_MAX = "2"
 RACK_ENV = "production"
 RAILS_ENV = "production"
-RAILS_GROUPS = "skylight"
 RAILS_LOG_TO_STDOUT = "enabled"
 RAILS_MAX_THREADS = "3"
 RAILS_SERVE_STATIC_FILES = "enabled"