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Your Link Checker Is Probably Checking Nothing
We planted eight defects in our own CI. Three were caught. One gate was skipping 133,874 of 149,516 links and reporting green. Here is the command that proves it.
· Paul Keen
What RubyLLM Retries, and For How Long
RubyLLM retries POSTs that Faraday would not, and honors Retry-After with no upper bound. A 429 can park a Rails request for as long as the provider says.
· JetThoughts Team
RubyLLM vs Langchainrb for Rails
RubyLLM is a model client with Rails generators. Langchainrb is retrieval plumbing. Pick by whether you query your own documents, not by provider count.
· JetThoughts Team
RubyLLM in Rails: Chat, Tools, Streaming
Add LLM chat to Rails with RubyLLM: one API for OpenAI, Claude, and Ollama, acts_as_chat persistence, tool calling, streaming into Turbo, and real trade-offs.
· JetThoughts Team
Ruby Fibers for LLM Streaming in Rails
LLM responses stream for 30 seconds while a Rails thread waits. The arithmetic of Puma threads vs open SSE streams, and when Falcon's fibers earn the switch.
Ruby 4.0 YJIT vs ZJIT: Performance Guide
Ruby 4.0 ships two JIT compilers. What YJIT delivers on Rails apps in 2026, the two flags worth tuning, and when the experimental ZJIT is worth a try.
Multi-Agent LLM Pipelines in Rails
Our production multi-agent LLM pipeline in Rails: eight RubyLLM agents on a 21-line base class, a 16-line loop, and the deploy that starved the database pool.
· JetThoughts Team
Evaluating LLM Agents in Rails
How a Rails team knows whether its LLM agents still work: bounded schemas at the boundary, and a per-iteration audit trail you can read a month later.
· JetThoughts Team
Debugging RubyLLM Agents in Rails
What a green Rails suite actually asserts when the thing under test is a hosted model: VCR matches on method and URI only, and the model can be retired.
· JetThoughts Team
Falcon in Production: Tuning and Benchmarks
Falcon production tuning: real benchmarks vs Puma, worker-count formulas, memory profiling, GC tuning, connection-pool sizing, and working config examples.
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Paul Keen, founder