Who contributed to Rails on June 15, 2026?

1 developer shipped this update, including matthewd.

What were the notable Rails updates?

Run Action Cable JS tests with Web Test Runner, Action Cable integration testing tweaks, and Include adapter in Active Job perform_start event payload.

@rails

Ruby on Rails - Shopify, Basecamp, GitHub all run on it

github ↗

Pick a date

Topics: Ruby Full archive →

The Wire · Showcase

RAILS DROPS KARMA FOR WEB TEST RUNNER, FIXES ACTION CABLE CI

By RepoJournal · Filed 06:00 UTC on June 15, 2026 · About Rails

1 person shipped this

matthewd @matthewd 2 cited

Rails is ditching deprecated Karma and moving Action Cable tests to Web Test Runner, while fixing a critical logging gap in Active Job events.

The Rails core team completed the migration away from Karma, the deprecated JavaScript test runner, by switching Action Cable's QUnit suite to Web Test Runner [1]. Karma hasn't accepted new features or bug fixes for months, and Web Test Runner provides a maintained Sauce launcher that keeps browser testing on supported tooling. Alongside this shift, the buildkite-config landed adjustments to stabilize Action Cable integration testing [2], installing iproute2 for Sauce browser sessions and treating exit code 3 as retryable before soft-failing, reducing noise in CI. On the framework side, Active Job's StructuredEventSubscriber now includes the adapter key in perform_start event payloads [3], matching every sibling event and fixing LogSubscriber output that expects adapter data to format queue information. Rails also fixed an edge case where remove_column migrations without a type argument are now properly marked irreversible [4], preventing silent rollback failures.

Action items

→ Review your Active Job event subscribers if you parse perform_start payloads rails/rails [plan]
→ Watch for Action Cable test stabilization in your CI runs after Web Test Runner switch rails/rails [monitor]

References

[1] Run Action Cable JS tests with Web Test Runner ↗ rails/rails
[2] Action Cable integration testing tweaks ↗ rails/buildkite-config
[3] Include adapter in Active Job perform_start event payload rails/rails
[4] Merge pull request #57714 from 55728/fix-invert-remove-column-options-only rails/rails

Quick answers

What shipped in Rails on June 15, 2026?: Rails is ditching deprecated Karma and moving Action Cable tests to Web Test Runner, while fixing a critical logging gap in Active Job events. In total, 30 commits and 17 pull requests landed.
Who contributed to Rails on June 15, 2026?: 1 developer shipped this update, including matthewd.
What were the notable Rails updates?: Run Action Cable JS tests with Web Test Runner, Action Cable integration testing tweaks, and Include adapter in Active Job perform_start event payload.

RAILS CLEANS UP DATABASE ADAPTER CRUFT, MARKS INSERT_RETURNING FOR REMOVAL

Rails is deprecating the `insert_returning` option after it became redundant across multiple insert paths, while extracting hidden parameters and removing dead code across the database layer.

ruby 24 shipped 1-min read

@rails 2 days ago

Rails drops Python 2 relics, tightens TimeZone validation

Rails is removing ruby2_keywords shims across the codebase now that Ruby 3.3.1 is the minimum, while TimeZone#parse gets stricter about invalid input.

ruby 22 shipped 1-min read

@rails 3 days ago

RAILS 8 LAZY ROUTES NOW THREAD-SAFE, SOLID QUEUE ADDS MIGRATION GENERATOR

A race condition in Rails 8's deferred route loading could serve 404s on valid routes under concurrent requests, and a fix landed overnight.

ruby 18 shipped 1-min read

@rails 4 days ago

SOLID QUEUE 1.5.0 SHIPS WITH CRITICAL CONCURRENCY FIXES

Solid Queue v1.5.0 lands three separate fixes for a production bug that corrupts semaphore counts and lets concurrency-limited jobs run wild.

ruby 45 shipped 1-min read

Elsewhere on the wire

AI Agents about 21 hours ago

CLINE SHIPS FIVE CRITICAL AGENT FIXES AFTER END-TO-END TESTING BLITZ

Saoudrizwan just landed a cascade of fixes that prevent the agent loop from running wild, stop file reads from resolving to the wrong directory, and plug the compaction pipeline.

ai-agents 16 shipped 2-min read

Local LLMs about 21 hours ago

LLAMA.CPP SHIPS MINIMAX-M3 SPARSE ATTENTION, VLLM UNLOCKS HETEROGENEOUS PREFILL-DECODE

The inference stack gets a new model architecture and a fundamental shift in how prefill and decode can run on different hardware configurations.

+10

llms 125 shipped 1-min read

@CachyOS about 21 hours ago

GLIBC 2.43 REBUILD SHIPS, INSTALLER JUMPS TO C++26

CachyOS pushed glibc 2.43 through the pipeline while the CLI installer upgraded its C++ standard to C++26, signaling a major refresh across core infrastructure.

infra 97 shipped 1-min read

Elixir & Phoenix about 21 hours ago

ECTO FIXES SUBQUERY PLANNING IN JOINS, ELIXIR PATCHES IEX PARSING

Ecto's query planner now handles subqueries correctly in interpolated join filters, while Elixir fixes a syntax error that broke 'not in' as a continuation operator in IEx.