Pure-Ruby DOOM, AOT-compiled to wasm by ASTro / koruby_precise, playable in the browser

Two Puma-derived Rack servers exercising Ruby's newest concurrency features: the M:N scheduler (PuMaNy) and Ractors (Punicorn).

GitHub Action for lumitrace: trace a PR's changed lines during tests and post the results as a Check Run.

lumitrace_sample_project

Analyze your Ruby scripts with prism

Launch [debugger](https://github.com/ruby/debug) if spec is failed.

kv: A page viewer written in Ruby

iseq_collector gem

to keep namespace

This gem provide `finalize_block` method.

プレゼントを提供するためのウェブアプリケーション

Inline expression tracing for Ruby

namespace for debug.gem (rdbg command)

Dump compiled iseq by binary (kakidasu) and load binary (yomidasu)

mysql2_recorder

MmappedString

safepoint-based sampling performance profiler for Ruby

vim clone on Ruby with agentic coding

Build Ruby from source code.

Show Ruby script with execution results.

MaNy project examples

Pretty your exception backtrace.

Ractor::LVar

Sync modified files using pscp on Windows.

SimplePaste web application