osm6495 · Jul 14, 2026 · Jul 14, 2026
@@ -5,18 +5,11 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 ruby '~> 3.3.4'
 
-# Rails 7.0 on purpose: this app reproduces the CardFlight failure where the
-# OTel Rails-family instrumentations (opentelemetry-instrumentation-rails >= 0.35)
-# raised their floor to Rails 7.1, so on Rails 7.0 they fail their runtime
-# `compatible?` check and never attach. Ruby stays at 3.3.4 (>= 3.2) so bundler
-# resolves the LATEST opentelemetry-instrumentation-all — the same versions a
-# real Rails 7.0 customer on a current Ruby gets. (On Ruby < 3.2 bundler would
-# self-heal to an older instrumentation-all and the bug would not reproduce.)
-gem 'rails', '~> 7.0.0'
-
-# Rails 7.0's test runner (railties test_unit line filtering) is incompatible
-# with minitest 6.x (the `run` arity changed). Pin to 5.x so the suite runs.
-# Unrelated to the instrumentation bug — just a Rails-7.0 test-toolchain pin.
+# Keep the legacy Rails-family instrumentation coverage on the oldest safe
+# Rails 7.1 release line.
+gem 'rails', '~> 7.1.5', '>= 7.1.5.2'
+
+# The Rails test runner is incompatible with minitest 6.x (`run` arity changed).
 gem 'minitest', '~> 5.0'
 
 # The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]

@@ -1,7 +1,7 @@
 PATH
   remote: ../../../../sdk/@launchdarkly/observability-ruby
   specs:
-    launchdarkly-observability (0.2.2)
+    launchdarkly-observability (0.3.0)
       launchdarkly-server-sdk (>= 8.11.0)
       opentelemetry-exporter-otlp (~> 0.28)
       opentelemetry-exporter-otlp-logs (~> 0.1)
@@ -31,72 +31,78 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (7.0.10)
-      actionpack (= 7.0.10)
-      activesupport (= 7.0.10)
+    actioncable (7.1.6)
+      actionpack (= 7.1.6)
+      activesupport (= 7.1.6)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (7.0.10)
-      actionpack (= 7.0.10)
-      activejob (= 7.0.10)
-      activerecord (= 7.0.10)
-      activestorage (= 7.0.10)
-      activesupport (= 7.0.10)
+      zeitwerk (~> 2.6)
+    actionmailbox (7.1.6)
+      actionpack (= 7.1.6)
+      activejob (= 7.1.6)
+      activerecord (= 7.1.6)
+      activestorage (= 7.1.6)
+      activesupport (= 7.1.6)
       mail (>= 2.7.1)
       net-imap
       net-pop
       net-smtp
-    actionmailer (7.0.10)
-      actionpack (= 7.0.10)
-      actionview (= 7.0.10)
-      activejob (= 7.0.10)
-      activesupport (= 7.0.10)
+    actionmailer (7.1.6)
+      actionpack (= 7.1.6)
+      actionview (= 7.1.6)
+      activejob (= 7.1.6)
+      activesupport (= 7.1.6)
       mail (~> 2.5, >= 2.5.4)
       net-imap
       net-pop
       net-smtp
-      rails-dom-testing (~> 2.0)
-    actionpack (7.0.10)
-      actionview (= 7.0.10)
-      activesupport (= 7.0.10)
+      rails-dom-testing (~> 2.2)
+    actionpack (7.1.6)
+      actionview (= 7.1.6)
+      activesupport (= 7.1.6)
+      cgi
+      nokogiri (>= 1.8.5)
       racc
-      rack (~> 2.0, >= 2.2.4)
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
       rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (7.0.10)
-      actionpack (= 7.0.10)
-      activerecord (= 7.0.10)
-      activestorage (= 7.0.10)
-      activesupport (= 7.0.10)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    actiontext (7.1.6)
+      actionpack (= 7.1.6)
+      activerecord (= 7.1.6)
+      activestorage (= 7.1.6)
+      activesupport (= 7.1.6)
       globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (7.0.10)
-      activesupport (= 7.0.10)
+    actionview (7.1.6)
+      activesupport (= 7.1.6)
       builder (~> 3.1)
-      erubi (~> 1.4)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    activejob (7.0.10)
-      activesupport (= 7.0.10)
+      cgi
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (7.1.6)
+      activesupport (= 7.1.6)
       globalid (>= 0.3.6)
-    activemodel (7.0.10)
-      activesupport (= 7.0.10)
-    activerecord (7.0.10)
-      activemodel (= 7.0.10)
-      activesupport (= 7.0.10)
-    activestorage (7.0.10)
-      actionpack (= 7.0.10)
-      activejob (= 7.0.10)
-      activerecord (= 7.0.10)
-      activesupport (= 7.0.10)
+    activemodel (7.1.6)
+      activesupport (= 7.1.6)
+    activerecord (7.1.6)
+      activemodel (= 7.1.6)
+      activesupport (= 7.1.6)
+      timeout (>= 0.4.0)
+    activestorage (7.1.6)
+      actionpack (= 7.1.6)
+      activejob (= 7.1.6)
+      activerecord (= 7.1.6)
+      activesupport (= 7.1.6)
       marcel (~> 1.0)
-      mini_mime (>= 1.1.0)
-    activesupport (7.0.10)
+    activesupport (7.1.6)
       base64
       benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
       logger (>= 1.4.2)
@@ -122,8 +128,10 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
+    cgi (0.5.2)
     concurrent-ruby (1.3.7)
-    crass (1.0.6)
+    connection_pool (3.0.2)
+    crass (1.0.7)
     date (3.5.1)
     debug (1.11.1)
       irb (~> 1.10)
@@ -132,7 +140,7 @@ GEM
     drb (2.2.3)
     erb (6.0.4)
     erubi (1.13.1)
-    globalid (1.3.0)
+    globalid (1.4.0)
       activesupport (>= 6.1)
     google-protobuf (4.35.1)
       bigdecimal
@@ -162,7 +170,7 @@ GEM
       llhttp (~> 0.6.1)
     http-cookie (1.1.6)
       domain_name (~> 0.5)
-    i18n (1.15.1)
+    i18n (1.15.2)
       concurrent-ruby (~> 1.0)
     importmap-rails (2.2.3)
       actionpack (>= 6.0.0)
@@ -196,15 +204,14 @@ GEM
     loofah (2.25.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    mail (2.9.0)
+    mail (2.9.1)
       logger
       mini_mime (>= 0.1.1)
       net-imap
       net-pop
       net-smtp
     marcel (1.2.1)
     matrix (0.4.3)
-    method_source (1.1.0)
     mini_mime (1.1.5)
     minitest (5.27.0)
     msgpack (1.8.3)
@@ -346,37 +353,45 @@ GEM
     puma (6.6.1)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (2.2.23)
+    rack (3.2.6)
+    rack-session (2.1.2)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
     rack-test (2.2.0)
       rack (>= 1.3)
-    rails (7.0.10)
-      actioncable (= 7.0.10)
-      actionmailbox (= 7.0.10)
-      actionmailer (= 7.0.10)
-      actionpack (= 7.0.10)
-      actiontext (= 7.0.10)
-      actionview (= 7.0.10)
-      activejob (= 7.0.10)
-      activemodel (= 7.0.10)
-      activerecord (= 7.0.10)
-      activestorage (= 7.0.10)
-      activesupport (= 7.0.10)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (7.1.6)
+      actioncable (= 7.1.6)
+      actionmailbox (= 7.1.6)
+      actionmailer (= 7.1.6)
+      actionpack (= 7.1.6)
+      actiontext (= 7.1.6)
+      actionview (= 7.1.6)
+      activejob (= 7.1.6)
+      activemodel (= 7.1.6)
+      activerecord (= 7.1.6)
+      activestorage (= 7.1.6)
+      activesupport (= 7.1.6)
       bundler (>= 1.15.0)
-      railties (= 7.0.10)
+      railties (= 7.1.6)
     rails-dom-testing (2.3.0)
       activesupport (>= 5.0.0)
       minitest
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.7.0)
       loofah (~> 2.25)
       nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (7.0.10)
-      actionpack (= 7.0.10)
-      activesupport (= 7.0.10)
-      method_source
+    railties (7.1.6)
+      actionpack (= 7.1.6)
+      activesupport (= 7.1.6)
+      cgi
+      irb
+      rackup (>= 1.0.0)
       rake (>= 12.2)
-      thor (~> 1.0)
-      zeitwerk (~> 2.5)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
     rake (13.4.2)
     rdoc (7.2.0)
       erb
@@ -427,7 +442,7 @@ GEM
       railties (>= 6.0.0)
     webrick (1.9.2)
     websocket (1.2.11)
-    websocket-driver (0.8.1)
+    websocket-driver (0.8.2)
       base64
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -459,7 +474,7 @@ DEPENDENCIES
   launchdarkly-server-sdk (~> 8.0)
   minitest (~> 5.0)
   puma (~> 6.0)
-  rails (~> 7.0.0)
+  rails (~> 7.1.5, >= 7.1.5.2)
   redis (~> 4.0)
   selenium-webdriver
   sprockets-rails

@@ -1,20 +1,16 @@
-# demo-rails70 — Rails 7.0 observability regression repro
+# demo-rails70 — legacy Rails observability regression repro
 
-A Rails **7.0** application that pins the LaunchDarkly observability plugin to a
-known-broken scenario and guards against it regressing. It is a copy of
-[`../demo`](../demo) (Rails 7.2) with Rails pinned to `~> 7.0`.
+A legacy Rails application that pins the LaunchDarkly observability plugin to a
+known-broken scenario and guards against it regressing. The historical directory
+name is retained to avoid path churn, while Rails is constrained to the oldest
+safe 7.1 release line.
 
 ## Why this exists
 
-CardFlight runs Rails 7.0. The plugin used to depend on
-`opentelemetry-instrumentation-all`, whose Rails-family members raised their
-minimum to **Rails 7.1**. On Rails 7.0 every Rails-family instrumentation failed
-its runtime `compatible?` check, logged a flurry of `"... failed to install"`
-warnings, and never attached — so the app lost all Rails auto-instrumentation
-(no HTTP server spans, DB spans, etc.) and got only manual instrumentation.
-
-The other e2e apps run Rails 7.2, which is **above** that floor, so they can
-never catch this class of break. This app reproduces it on Rails 7.0.
+The plugin used to depend on `opentelemetry-instrumentation-all`, whose
+Rails-family members could fail their runtime `compatible?` checks and never
+attach. This app keeps dedicated coverage for the individually pinned
+Rails-family instrumentations on an older supported Rails release.
 
 Ruby stays at **3.3.4** on purpose: on a current Ruby, Bundler still resolves the
 *latest* instrumentation gems, faithfully matching a real Rails 7.0 customer. (On
@@ -33,9 +29,9 @@ are actually **exported over the wire** — in pure Ruby, no Docker or Node, und
 
 `test/integration/otlp_export_e2e_test.rb` is the headline test:
 
-- **Before the fix** (instrumentation-all → instrumentation-rails 0.42): no server
-  span is produced or exported — the test fails.
-- **After the fix** (instrumentation-rails pinned to 0.41): the server span,
+- **Without compatible Rails-family instrumentation**: no server span is
+  produced or exported — the test fails.
+- **With instrumentation-rails pinned to 0.41**: the server span,
   log, and exception all reach the sink — the test passes.
 
 ## Running it

@@ -69,7 +69,7 @@
 	},
 	"author": "",
 	"peerDependencies": {
-		"next": ">=14",
+		"next": ">=14.2.25",
 		"react": ">=17"
 	},
 	"dependencies": {
@@ -87,7 +87,7 @@
 		"@types/js-cookie": "^3",
 		"@types/node": "^20.14.7",
 		"@types/react": "^19.0.10",
-		"next": ">=14",
+		"next": ">=14.2.25",
 		"react": "^19.0.0",
 		"rollup": "^4.4.1",
 		"typescript": "^5.0.4"