joelhawksley · Oct 19, 2026 · Oct 19, 2026 · Oct 19, 2026 · Oct 19, 2026
diff --git a/Appraisals b/Appraisals
@@ -47,23 +47,29 @@ end
 appraise "rails-main" do
   ruby "~> 4.0"
 
-  gem "rack", git: "https://github.com/rack/rack", ref: "8a4475a9f416a72e5b02bd7817e4a8ed684f29b0"
-  gem "rails", github: "rails/rails", branch: "main"
+  gem "rack", git: "https://github.com/rack/rack", ref: "a9833c8f3bd6b6d1e0ab35de00a1f1a16b5095f5"
+  gem "rails", github: "rails/rails", ref: "7a569bc6cbf10cb07023ac63a838fd0a6b39cad4"
+  # Ractor support, https://github.com/ruby-i18n/i18n/pull/741
+  gem "i18n", github: "Shopify/i18n", ref: "58aa1dcd3e04c34831e1c2ec06c83391559c7c91"
 
   group :development, :test do
     gem "turbo-rails", "~> 2"
-    gem "rspec-rails", "~> 8"
+    # Compatibility with frozen default_url_options, unreleased as of 8.0.4
+    gem "rspec-rails", github: "rspec/rspec-rails", ref: "4832492d8a1683bab4b74dc218576f64b0ff988c"
   end
 end
 
 appraise "rails-main_head" do
   ruby "4.1.0.dev"
 
-  gem "rack", git: "https://github.com/rack/rack", ref: "8a4475a9f416a72e5b02bd7817e4a8ed684f29b0"
-  gem "rails", github: "rails/rails", branch: "main"
+  gem "rack", git: "https://github.com/rack/rack", ref: "a9833c8f3bd6b6d1e0ab35de00a1f1a16b5095f5"
+  gem "rails", github: "rails/rails", ref: "7a569bc6cbf10cb07023ac63a838fd0a6b39cad4"
+  # Ractor support, https://github.com/ruby-i18n/i18n/pull/741
+  gem "i18n", github: "Shopify/i18n", ref: "58aa1dcd3e04c34831e1c2ec06c83391559c7c91"
 
   group :development, :test do
     gem "turbo-rails", "~> 2"
-    gem "rspec-rails", "~> 8"
+    # Compatibility with frozen default_url_options, unreleased as of 8.0.4
+    gem "rspec-rails", github: "rspec/rspec-rails", ref: "4832492d8a1683bab4b74dc218576f64b0ff988c"
   end
 end
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
@@ -10,6 +10,14 @@ nav_order: 6
 
 ## main
 
+* Support rendering compiled components, including slots, collections, variants, inheritance, and sidecar translations, in non-main Ractors under Rails' experimental `Rails.application.ractorize!`. Methods ViewComponent generates are now defined with Ractor-shareable procs, the compile cache is shareable, and class-level state read while rendering is made shareable before the application is ractorized. Sidecar translations also require an i18n release with Ractor support.
+
+    *Joel Hawksley*
+
+* Support Rails main's `ActionView::TemplateDetails::Requested`, which no longer exposes `locale`, `formats`, `variants` or `handlers`, in `MissingTemplateError`. Use `I18n.reserved_keys` when available, since newer i18n deprecates `I18n::RESERVED_KEYS`.
+
+    *Joel Hawksley*
+
 * Only register the executor hook that watches component templates when Action View doesn't cache templates at boot. With template caching on, as in production, the hook did nothing but still read `ActionView::Base.cache_template_loading` on every request. That value lives in a class variable, which non-main Ractors can't read on Ruby 4.0, so under Rails' experimental `Rails.application.ractorize!` every request failed.
 
     *Mikael Henriksson*

diff --git a/gemfiles/rails_main.gemfile b/gemfiles/rails_main.gemfile
@@ -4,8 +4,9 @@ source "https://rubygems.org"
 
 ruby "~> 4.0"
 
-gem "rails", github: "rails/rails", branch: "main"
-gem "rack", git: "https://github.com/rack/rack", ref: "8a4475a9f416a72e5b02bd7817e4a8ed684f29b0"
+gem "rails", github: "rails/rails", ref: "7a569bc6cbf10cb07023ac63a838fd0a6b39cad4"
+gem "rack", git: "https://github.com/rack/rack", ref: "a9833c8f3bd6b6d1e0ab35de00a1f1a16b5095f5"
+gem "i18n", github: "Shopify/i18n", ref: "58aa1dcd3e04c34831e1c2ec06c83391559c7c91"
 
 group :development, :test do
   gem "appraisal", "~> 2"
@@ -31,7 +32,7 @@ group :development, :test do
   gem "rails-dom-testing", "~> 2.3.0"
   gem "reactionview"
   gem "redis"
-  gem "rspec-rails", "~> 8"
+  gem "rspec-rails", github: "rspec/rspec-rails", ref: "4832492d8a1683bab4b74dc218576f64b0ff988c"
   gem "rubocop-md", "~> 2"
   gem "selenium-webdriver", "~> 4"
   gem "simplecov-console", "< 1"

diff --git a/gemfiles/rails_main.gemfile.lock b/gemfiles/rails_main.gemfile.lock
@@ -1,14 +1,22 @@
+GIT
+  remote: https://github.com/Shopify/i18n.git
+  revision: 58aa1dcd3e04c34831e1c2ec06c83391559c7c91
+  ref: 58aa1dcd3e04c34831e1c2ec06c83391559c7c91
+  specs:
+    i18n (1.15.2)
+      concurrent-ruby (~> 1.0)
+
 GIT
   remote: https://github.com/rack/rack
-  revision: 8a4475a9f416a72e5b02bd7817e4a8ed684f29b0
-  ref: 8a4475a9f416a72e5b02bd7817e4a8ed684f29b0
+  revision: a9833c8f3bd6b6d1e0ab35de00a1f1a16b5095f5
+  ref: a9833c8f3bd6b6d1e0ab35de00a1f1a16b5095f5
   specs:
-    rack (3.1.1)
+    rack (3.2.0)
 
 GIT
   remote: https://github.com/rails/rails.git
-  revision: 9cc62ec2a5c4ac56f7571f05489da9d27c6df69d
-  branch: main
+  revision: 7a569bc6cbf10cb07023ac63a838fd0a6b39cad4
+  ref: 7a569bc6cbf10cb07023ac63a838fd0a6b39cad4
   specs:
     actioncable (8.2.0.alpha)
       actionpack (= 8.2.0.alpha)
@@ -52,11 +60,12 @@ GIT
       activesupport (= 8.2.0.alpha)
       builder (~> 3.1)
       erubi (~> 1.11)
+      herb (>= 0.10)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.7)
     activejob (8.2.0.alpha)
       activesupport (= 8.2.0.alpha)
-      globalid (>= 0.3.6)
+      globalid (>= 1.4.0)
     activemodel (8.2.0.alpha)
       activesupport (= 8.2.0.alpha)
     activerecord (8.2.0.alpha)
@@ -68,7 +77,7 @@ GIT
       activejob (= 8.2.0.alpha)
       activerecord (= 8.2.0.alpha)
       activesupport (= 8.2.0.alpha)
-      marcel (~> 1.0)
+      marcel (~> 2.0)
     activesupport (8.2.0.alpha)
       base64
       bigdecimal
@@ -80,6 +89,7 @@ GIT
       logger (>= 1.4.2)
       minitest (>= 5.1)
       psych (>= 4)
+      ractor-dispatch (>= 0.3.0)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
       uri (>= 0.13.1)
@@ -107,6 +117,20 @@ GIT
       tsort (>= 0.2)
       zeitwerk (~> 2.6)
 
+GIT
+  remote: https://github.com/rspec/rspec-rails.git
+  revision: 4832492d8a1683bab4b74dc218576f64b0ff988c
+  ref: 4832492d8a1683bab4b74dc218576f64b0ff988c
+  specs:
+    rspec-rails (8.1.0.pre)
+      actionpack (>= 7.2)
+      activesupport (>= 7.2)
+      railties (>= 7.2)
+      rspec-core (>= 3.13.0, < 5.0.0)
+      rspec-expectations (>= 3.13.0, < 5.0.0)
+      rspec-mocks (>= 3.13.0, < 5.0.0)
+      rspec-support (>= 3.13.0, < 5.0.0)
+
 PATH
   remote: ..
   specs:
@@ -149,7 +173,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.8)
     connection_pool (3.0.2)
     crass (1.0.6)
     cuprite (0.17)
@@ -175,7 +199,7 @@ GEM
       concurrent-ruby (~> 1.1)
       webrick (~> 1.7)
       websocket-driver (~> 0.7)
-    globalid (1.3.0)
+    globalid (1.4.0)
       activesupport (>= 6.1)
     haml (7.2.0)
       temple (>= 0.8.2)
@@ -190,8 +214,6 @@ GEM
     herb (0.10.1-x86_64-darwin)
     herb (0.10.1-x86_64-linux-gnu)
     herb (0.10.1-x86_64-linux-musl)
-    i18n (1.14.8)
-      concurrent-ruby (~> 1.0)
     io-console (0.8.2)
     irb (1.18.0)
       pp (>= 0.6.0)
@@ -216,11 +238,10 @@ GEM
       net-imap
       net-pop
       net-smtp
-    marcel (1.1.0)
+    marcel (2.1.0)
     matrix (0.4.3)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.9)
     minitest (6.0.6)
       drb (~> 2.0)
       prism (~> 1.5)
@@ -240,9 +261,6 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.5)
-    nokogiri (1.19.3)
-      mini_portile2 (~> 2.8.2)
-      racc (~> 1.4)
     nokogiri (1.19.3-aarch64-linux-gnu)
       racc (~> 1.4)
     nokogiri (1.19.3-aarch64-linux-musl)
@@ -285,6 +303,7 @@ GEM
       rack (>= 1.3)
     rackup (2.3.1)
       rack (>= 3)
+    ractor-dispatch (0.3.0)
     rails-dom-testing (2.3.0)
       activesupport (>= 5.0.0)
       minitest
@@ -317,14 +336,6 @@ GEM
     rspec-mocks (3.13.8)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-rails (8.0.4)
-      actionpack (>= 7.2)
-      activesupport (>= 7.2)
-      railties (>= 7.2)
-      rspec-core (>= 3.13.0, < 5.0.0)
-      rspec-expectations (>= 3.13.0, < 5.0.0)
-      rspec-mocks (>= 3.13.0, < 5.0.0)
-      rspec-support (>= 3.13.0, < 5.0.0)
     rspec-support (3.13.7)
     rubocop (1.84.2)
       json (~> 2.3)
@@ -456,6 +467,7 @@ DEPENDENCIES
   dry-initializer
   erb_lint
   haml (~> 7)
+  i18n!
   jbuilder (~> 2)
   m (~> 1)
   method_source (~> 1)
@@ -471,7 +483,7 @@ DEPENDENCIES
   rake (~> 13)
   reactionview
   redis
-  rspec-rails (~> 8)
+  rspec-rails!
   rubocop-md (~> 2)
   selenium-webdriver (~> 4)
   simplecov (< 1)
@@ -511,7 +523,7 @@ CHECKSUMS
   bigdecimal (4.1.2) sha256=53d217666027eab4280346fba98e7d5b66baaae1b9c3c1c0ffe89d48188a3fbd
   builder (3.3.0) sha256=497918d2f9dca528fdca4b88d84e4ef4387256d984b8154e9d5d3fe5a9c8835f
   capybara (3.40.0) sha256=42dba720578ea1ca65fd7a41d163dd368502c191804558f6e0f71b391054aeef
-  concurrent-ruby (1.3.6) sha256=6b56837e1e7e5292f9864f34b69c5a2cbc75c0cf5338f1ce9903d10fa762d5ab
+  concurrent-ruby (1.3.8) sha256=b2f1be836e968ccc78ccfce277ea79c72a88633f22306782c16ff23fb415d1e1
   connection_pool (3.0.2) sha256=33fff5ba71a12d2aa26cb72b1db8bba2a1a01823559fb01d29eb74c286e62e0a
   crass (1.0.6) sha256=dc516022a56e7b3b156099abc81b6d2b08ea1ed12676ac7a5657617f012bd45d
   cuprite (0.17) sha256=b140d5dc70d08b97ad54bcf45cd95d0bd430e291e9dffe76fff851fddd57c12b
@@ -524,7 +536,7 @@ CHECKSUMS
   erb_lint (0.9.0) sha256=dfb5e40ad839e8d1f0d56ca85ec9a7ac4c9cd966ec281138282f35b323ca7c31
   erubi (1.13.1) sha256=a082103b0885dbc5ecf1172fede897f9ebdb745a4b97a5e8dc63953db1ee4ad9
   ferrum (0.17.2) sha256=2c2540a850b211a46f4d81de21bfd62048f507e4c327d1807225c3823c17e6ee
-  globalid (1.3.0) sha256=05c639ad6eb4594522a0b07983022f04aa7254626ab69445a0e493aa3786ff11
+  globalid (1.4.0) sha256=037f12fbf1d9d7a014d501c2d5c77356fd4ddd96d7a7991d6700bba96706f427
   haml (7.2.0) sha256=87fd2b71f7feab1724337b090a7d767f5ab2d42f08c974f3ead673f18cfcd55a
   herb (0.10.1) sha256=e7b64076e275a2e97fc5dd5e8ab9ad1bd55840871395ea8d3e481de73a82d32f
   herb (0.10.1-aarch64-linux-gnu) sha256=fd9f4f8e0bcd9a421de55ff8810066550e9bcba8c8bf53737b32a04eb2fcbc49
@@ -535,7 +547,7 @@ CHECKSUMS
   herb (0.10.1-x86_64-darwin) sha256=dc266814a63215eefb82cf4f55ce723bc20218395b13c1631c11ca7cfc782d07
   herb (0.10.1-x86_64-linux-gnu) sha256=c7762d411a6d2e1a032cf403b0429155c01ab48b3b5be2a0aab1e921da6b8948
   herb (0.10.1-x86_64-linux-musl) sha256=a5bb7c82bbc30a9eb80cb833fea749f543a0709d9f858f7db366a3c2616d969b
-  i18n (1.14.8) sha256=285778639134865c5e0f6269e0b818256017e8cde89993fdfcbfb64d088824a5
+  i18n (1.15.2)
   io-console (0.8.2) sha256=d6e3ae7a7cc7574f4b8893b4fca2162e57a825b223a177b7afa236c5ef9814cc
   irb (1.18.0) sha256=de9454a0703a54704b9811a5ef31a60c86949fbf4013fcf244fabc7c775248e3
   jbuilder (2.14.1) sha256=4eb26376ff60ef100cb4fd6fd7533cd271f9998327e86adf20fd8c0e69fabb42
@@ -546,11 +558,10 @@ CHECKSUMS
   loofah (2.25.1) sha256=d436c73dbd0c1147b16c4a41db097942d217303e1f7728704b37e4df9f6d2e04
   m (1.7.0) sha256=058f793da8150c51353cc59366ffae7774683e868bede3c78f81d920fb9d633a
   mail (2.9.0) sha256=6fa6673ecd71c60c2d996260f9ee3dd387d4673b8169b502134659ece6d34941
-  marcel (1.1.0) sha256=fdcfcfa33cc52e93c4308d40e4090a5d4ea279e160a7f6af988260fa970e0bee
+  marcel (2.1.0) sha256=f8b0327111dc7e516331eeefe052e981ce50e2bd826c1042a53cdf047fcc3512
   matrix (0.4.3) sha256=a0d5ab7ddcc1973ff690ab361b67f359acbb16958d1dc072b8b956a286564c5b
   method_source (1.1.0) sha256=181301c9c45b731b4769bc81e8860e72f9161ad7d66dd99103c9ab84f560f5c5
   mini_mime (1.1.5) sha256=8681b7e2e4215f2a159f9400b5816d85e9d8c6c6b491e96a12797e798f8bccef
-  mini_portile2 (2.8.9) sha256=0cd7c7f824e010c072e33f68bc02d85a00aeb6fce05bb4819c03dfd3c140c289
   minitest (6.0.6) sha256=153ea36d1d987a62942382b61075745042a2b3123b1cd48f4c3675af9cc7d6f1
   minitest-memory (1.1.0) sha256=1251476a6e636a9b3bf4f02cd50a2edd6837db53afb81c5e78474e7144f1b747
   minitest-mock (5.27.0) sha256=7040ed7185417a966920987eaa6eaf1be4ea1fc5b25bb03ff4703f98564a55b0
@@ -560,7 +571,6 @@ CHECKSUMS
   net-protocol (0.2.2) sha256=aa73e0cba6a125369de9837b8d8ef82a61849360eba0521900e2c3713aa162a8
   net-smtp (0.5.1) sha256=ed96a0af63c524fceb4b29b0d352195c30d82dd916a42f03c62a3a70e5b70736
   nio4r (2.7.5) sha256=6c90168e48fb5f8e768419c93abb94ba2b892a1d0602cb06eef16d8b7df1dca1
-  nokogiri (1.19.3) sha256=78312cbac32a40c812780d9678221b79d51288eec00054c1a8d15f7ce05960e8
   nokogiri (1.19.3-aarch64-linux-gnu) sha256=46b89e5d7b9e844c2ee360794240c6ea2a4e6fa0c5892a4ed487db621224b639
   nokogiri (1.19.3-aarch64-linux-musl) sha256=8392dfdcd21be7a94dbbe9ccc138dea01b97b24cb2dc02a114ca98bfb1d9a0b7
   nokogiri (1.19.3-arm-linux-gnu) sha256=3919d5ffc334ad778a4a9eb88fda7dcb8b1fb58c8a52ac640c6dcd2f038e774f
@@ -579,10 +589,11 @@ CHECKSUMS
   public_suffix (7.0.5) sha256=1a8bb08f1bbea19228d3bed6e5ed908d1cb4f7c2726d18bd9cadf60bc676f623
   puma (8.0.1) sha256=7b94e50c07655718c1fb8ae41a11fc06c7d61293208b3aa608ff71a46d3ad37c
   racc (1.8.1) sha256=4a7f6929691dbec8b5209a0b373bc2614882b55fc5d2e447a21aaa691303d62f
-  rack (3.1.1)
+  rack (3.2.0)
   rack-session (2.1.2) sha256=595434f8c0c3473ae7d7ac56ecda6cc6dfd9d37c0b2b5255330aa1576967ffe8
   rack-test (2.2.0) sha256=005a36692c306ac0b4a9350355ee080fd09ddef1148a5f8b2ac636c720f5c463
   rackup (2.3.1) sha256=6c79c26753778e90983761d677a48937ee3192b3ffef6bc963c0950f94688868
+  ractor-dispatch (0.3.0) sha256=cd2d46743303e00fe500df168b4dde85080160fd9f04539cada4b4dd5e588f68
   rails (8.2.0.alpha)
   rails-dom-testing (2.3.0) sha256=8acc7953a7b911ca44588bf08737bc16719f431a1cc3091a292bca7317925c1d
   rails-html-sanitizer (1.7.0) sha256=28b145cceaf9cc214a9874feaa183c3acba036c9592b19886e0e45efc62b1e89
@@ -599,7 +610,7 @@ CHECKSUMS
   rspec-core (3.13.6) sha256=a8823c6411667b60a8bca135364351dda34cd55e44ff94c4be4633b37d828b2d
   rspec-expectations (3.13.5) sha256=33a4d3a1d95060aea4c94e9f237030a8f9eae5615e9bd85718fe3a09e4b58836
   rspec-mocks (3.13.8) sha256=086ad3d3d17533f4237643de0b5c42f04b66348c28bf6b9c2d3f4a3b01af1d47
-  rspec-rails (8.0.4) sha256=06235692fc0892683d3d34977e081db867434b3a24ae0dd0c6f3516bad4e22df
+  rspec-rails (8.1.0.pre)
   rspec-support (3.13.7) sha256=0640e5570872aafefd79867901deeeeb40b0c9875a36b983d85f54fb7381c47c
   rubocop (1.84.2) sha256=5692cea54168f3dc8cb79a6fe95c5424b7ea893c707ad7a4307b0585e88dbf5f
   rubocop-ast (1.49.1) sha256=4412f3ee70f6fe4546cc489548e0f6fcf76cafcfa80fa03af67098ffed755035
@@ -657,4 +668,4 @@ RUBY VERSION
   ruby 4.0.1
 
 BUNDLED WITH
-  4.1.0.dev
+  4.0.16
diff --git a/gemfiles/rails_main_head.gemfile b/gemfiles/rails_main_head.gemfile
@@ -4,8 +4,9 @@ source "https://rubygems.org"
 
 ruby "4.1.0.dev"
 
-gem "rails", github: "rails/rails", branch: "main"
-gem "rack", git: "https://github.com/rack/rack", ref: "8a4475a9f416a72e5b02bd7817e4a8ed684f29b0"
+gem "rails", github: "rails/rails", ref: "7a569bc6cbf10cb07023ac63a838fd0a6b39cad4"
+gem "rack", git: "https://github.com/rack/rack", ref: "a9833c8f3bd6b6d1e0ab35de00a1f1a16b5095f5"
+gem "i18n", github: "Shopify/i18n", ref: "58aa1dcd3e04c34831e1c2ec06c83391559c7c91"
 
 group :development, :test do
   gem "appraisal", "~> 2"
@@ -31,7 +32,7 @@ group :development, :test do
   gem "rails-dom-testing", "~> 2.3.0"
   gem "reactionview"
   gem "redis"
-  gem "rspec-rails", "~> 8"
+  gem "rspec-rails", github: "rspec/rspec-rails", ref: "4832492d8a1683bab4b74dc218576f64b0ff988c"
   gem "rubocop-md", "~> 2"
   gem "selenium-webdriver", "~> 4"
   gem "simplecov-console", "< 1"