GitHub Adopts Herb Across 500K Lines of ERB
Joel Hawksley, staff engineer on the github.com Rails monolith, publishes the inside story: Rails core wants Herb to replace Erubi, and GitHub — rendering ERB at the largest scale of any Rails app — was asked to validate the parser.
500,000 lines of ERB across 10,000 files. 2,768 files initially failed Herb parsing. Herb caught markup and Ruby errors erb_lint had missed (~150 mismatched-tag cases alone). Marco Roth's Herb v0.10 shipped the same week — diff engine, dev server, and the foundation for reactive ERB rendering.
May 6, 2026 · hawksley.org
Matz Ships an AI-Built Ruby Compiler
Apr 24, 2026
At RubyKaigi 2026, Matz unveils Spinel — a native Ruby AOT compiler 11.6× faster than MiniRuby on Ruby 4.1. Ruby → AST → C → native binary. A three-year-old idea, implemented in weeks with Claude Code. MIT, 1.5K stars in two weeks.
Read more about SpinelStripe: 50M-Line Ruby CI + 288 at Sessions
Apr 9 · Apr 29–May 1, 2026
SF Ruby company (Sinatra + internal framework) bookends April with two big signals. Aditya Anchuri details Stripe's 50-million-line Ruby monolith and Selective Test Execution (~5% of tests per PR). Days later: 288 Sessions launches — Agentic Commerce with Meta/Google, AI-agent wallet, 9,000 attendees at Moscone.
Read the CI post about StripeIntercom Launches Fin for Sales
Apr 24, 2026
Fin moves beyond support. New Fin for Sales qualifies leads, books meetings, starts trials; Fin Copilot adds a free tier (10 conversations/month per agent); Fin Insights ships CX Score. Fin growing 350% YoY across 8,000 companies — all on a 2M-line Rails monolith.
Read more about Intercom Fin for SalesRubyLLM 1.15: Image Editing + Cost Tracking
Carmine Paolino's RubyLLM (≈5M downloads) ships image editing via paint, conversation cost tracking with cache-read/write buckets, and Action Text plain-text extraction so HTML doesn't leak into prompts. Now the de-facto Ruby LangChain.
SF Ruby Meetup, May @ Checkr
Thursday May 21, 5pm, One Montgomery St. Kurt Ude (Checkr) on engineering fraud at enterprise scale, Waldemar Quevedo (Synadia) on building agents in Ruby with DSPy, and Pranav Raj (Chatwoot CEO, YC W21). 116+ RSVPs.
RSVP on Luma - SF Ruby May meetup at CheckrRails World 2026: Austin, AI Track, 1,200 Seats
Rails Foundation announces the biggest Rails World yet: Austin, Sep 23–24, 1,200-attendee capacity, dedicated AI / Agentic Systems and Trust & Security tracks. CFP closes May 16. General admission ($699) on sale May 12, 10am CT.
Read announcement - Rails World 2026 CFPJoin the Next SF Ruby Meetup
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April 2026
13 talks · Intercom
Show talks
- 5:10 Brian Scanlan (Intercom) — Turning Claude into a Full-Stack Engineering Platform
- 50:41 Konstantin Gredeskoul (Archive) — Stop Asking Useless Questions: Adaptive User Flows with Ruby DSLs and LLMs
- 1:20:07 John Woodell — Building Voter Mailers in Ruby
- 1:28:36 Miles Georgi — Ractorize: Wrapping Ruby Objects in Ractors
- 1:31:43 Matt Duszynski (NexHealth) — Volunteer Standup 😎
- 1:33:59 Jake Moffatt — My AI Development Workflow with Parallel Coding Agents
- 1:38:55 Michael Foley — Judging Code on Gut — Reading DHH's 2012 Ruby Rogues Letter
- 1:42:00 Ziggy the Hamster — Announcing 'Weird and Wacky Machines Running Ruby' at RubyConf 2026
- 1:46:25 Galileo Friedman (Superconductor) — Superconductor: Multiplayer Agent Workflows in the Cloud
- 1:58:23 Irina Nazarova (Evil Martians) — Whop Is Hiring an SRE
- 2:00:18 Hector Miramontes (RefundDesk) — RefundDesk: A Rails App for Customs Brokers to Claim Tariff Refunds
- 2:03:10 Chris Davis (Bootstrapital) — Semi-Autonomous Software: Putting the Human in the Loop with Rubot
- 2:14:52 Dmitry Kozlov — claude-yolo: Parallel Claude Code Agents in tmux
February 2026
14 talks · Sentry
Show talks
- 4:15 Neil Manvar (Sentry) — Introducing Sentry Seer
- 9:54 Sohil Kshirsagar (Tusk) — Why Coding Agents Need a Harness, Not Just Guardrails
- 33:08 Mike Dalton (Calendar Vision) — How to Turn Images into Calendar Events
- 1:01:12 André Arko (gem.coop) — gem.coop: A Community-Owned Gem Hosting Service
- 1:03:29 Ziggy the Hamster — Announcing 'What Cursed Platforms Does Ruby Run On?' at RubyConf 2026
- 1:05:31 Miles Georgi — Ractors Are Just Actors with an R — Benchmarking Ractors vs Threads
- 1:07:08 Rhiannon Payne — Marketing Services for Ruby Startups
- 1:08:13 Daniel Farina (Ubicloud) — Ubicloud Is Hiring
- 1:09:30 Jake Moffatt — Building an Ambient OS on the Open Home Dev Kit
- 1:10:20 Justin Bowen — Ragents: A Ractor-Based Agent Gem (RubyKaigi 2026 Preview)
- 1:11:50 Cameron Dutro (Cisco Meraki) — garnet-js: Implementing the YARV Virtual Machine in TypeScript
- 1:15:12 Irina Nazarova (Evil Martians) — Solaris: Vibe-Coding an Internal Rails App Over Two Weekends
- 1:20:19 Vladimir Dementyev (Evil Martians) — Does Architecture Still Matter When AI Writes the Code?
- 2:03:09 Brandon Weaver (One Medical) — Q&A about Ruby Central
Rails X: Shaping the Future of Rails Together
Vladimir (Vova) Dementyev · SF Ruby Conf 2025
RubyLLM: One API, One Person, One Machine for AI
Carmine Paolino · SF Ruby Conf 2025
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Suppli provides digital payments and accounts receivable (AR) software solutions for construction materials supply and distribution sector.
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Simple AI makes it easy to build and deploy enterprise-grade phone agents in days, not weeks. Iconic businesses use us for sales calls, customer support, leads qualification, and more. YC-backed.
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