Ken C. Demanawa Claim this profile

Reliable delivery of PostgreSQL logical replication events with retries, dead letters, and operational state.

Floating Spherical Mammoth in a Fluffy Cloud -- a production-shaped, cloud-native SaaS reference application showcasing the Mammoth PostgreSQL CDC data plane and modern platform engineering practices.

Public product and customer onboarding site for the commercial CDC Pro for Redis

Ractor-safe mutable data structures for Ruby

Database-agnostic Change Data Capture domain primitives for Ruby

Headless Chrome Ruby API

Lightweight creator/updater/deleter tracking for ActiveRecord models

Consumer-side integrity verification for Ruby gems

A Ruby Client Library for Twelve Data API

Normalize decoded pgoutput events into downstream change-event platforms.

Decodes pgoutput-parser protocol messages into immutable Ruby row-change events.

Transport-only PostgreSQL logical replication client for receiving pgoutput CopyData payloads.

PostgreSQL-native Search Observability Data Plane built on Mammoth CDC. Implements real-time data sovereignty, RLS multi-tenancy, and layout drift isolation for SERP API payloads with SearchApi as the first supported provider adapter.

Canonical audit sink for the CDC ecosystem. Chronicle immutable change events into pluggable ledgers.

Bridges PostgreSQL CDC events into Solid Queue-backed Active Job processors.

whodunit-chronicles - the complete historical record of your data of whodunit did what

Optional Ractor-backed parallel execution for `cdc-core`. It accelerates Change Data Capture (CDC) pipelines while preserving the simplicity and composability of the CDC Ecosystem

Sidekiq-powered Change Data Capture processing for Ruby applications.

JWT authentication and authorization middleware for multi-tenant Rack applications

Provides optional Async-backed I/O-concurrent execution for cdc-core. It accelerates I/O-bound Change Data Capture (CDC) event processing while preserving the cdc-core programming model.

A pure Ruby parser for PostgreSQL pgoutput logical replication CopyData payloads.

No description.

A multi-tenant, open-source API Gateway built on OpenResty with a Sinatra admin API.

TenantGate - The Multi-Tenant API Gateway That Actually Gets It

A rails app to demonstrate how to deploy to an AWS EC2 using Gjallarhon

Multi-cloud deployment guardian as legendary as Heimdall's horn

Unified interface for AI providers including Ollama (local), Anthropic Claude, OpenAI GPT, and HuggingFace models

An AI-powered chat application demonstrating the Prescient gem's capabilities with provider fallback mechanisms, built with Rails 8 and modern web technologies.

Ruby on Rails integration for TimescaleDB's pgai PostgreSQL extension

Extends the Time class with methods for parsing and conversion

The Ruby Programming Language

Easily build Ruby native extensions in Rust

Ayayay!

A high-performance Ractor web server for Ruby 4.0+: Rack 3-based, with a Rust Tokio/Hyper front-end and Ractor-parallel Ruby workers and threaded fallback mode.

Fast high-level web crawling Ruby framework

Ruby bindings for wreq, an HTTP client with TLS/HTTP2 browser fingerprinting

Kubernetes adapter, Helm charts, KEDA templates, and operational defaults for Ruby CDC workloads.

Platform-neutral operational contracts for Ruby CDC workloads.

Ruby resource objects, waiters, endpoint helpers, project scaffolding, packaging, and deployment ergonomics built on top of aws-sdk-lambda.

No description.

A proof of concept demonstrating how Ratomic::Map and Ratomic::Counter can be applied to API gateway concerns.

Sidekiq middleware for caching tenant policy decisions with `Ratomic::Map` and tracking middleware counters with `Ratomic::Counter`

A Hello World ruby gem with rust extension example

Ruby ♥︎ JavaScript

Networked Ruby Ractors

A self-paced course to learn Rust, one exercise at a time.

Lightweight Ruby

A production Next.js SaaS on AWS for **$0.00/month** — no NAT Gateway, no managed services, no public IPs

rack-jwt-aegis-example

The open LMS by Instructure, Inc.

No description.

Ruby on Rails

Automatically check the ruby-advisory-db Database for advisories in your installed Gems.

A development framework for Ruby on Rails developers using Claude Code, inspired by SuperClaude

A Ruby gem implementation of a Model Context Protocol (MCP) server for Rails projects. This server allows LLMs (Large Language Models) to interact with Rails projects through the Model Context Protocol.

Easily launch a Claude Code session that is connected to a swarm of Claude Code Agents

DeSIRu (Declarative Self-Improving Ruby)

Yet Another Todo API only app written in Go

No description.

No description.