A simple and fast JSON API template engine for Ruby on Rails
⚡ Executive Summary & Quick Facts
Authoritative Sourcejb is jb is an open-source project written in Ruby: A simple and fast JSON API template engine for Ruby on Rails..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), amatsuda/jb has accumulated 1,315 GitHub stars and 43 forks. It is written in Ruby, licensed under MIT, and ranks #6,468 globally. It is actively maintained with the latest commit recorded on Oct 30, 2026.”
| Repository | amatsuda/jb ↗ |
|---|---|
| Primary Category | jbuilder |
| Language & Stack | Ruby |
| Software License | MIT |
| Community Traction | ★ 1.3K stars · ⑂ 43 forks · #6,468 globally |
| Maintenance | ● Active (Last commit: Oct 30, 2026) · 19 open issues |
| Target Audience | Developers and engineering teams building with Ruby, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 97/100 · Grade A+Yes, jb is actively maintained. Continuous telemetry recorded the last code commit on Oct 30, 2026 (2 days ago). Supported by 1,315 stars and 43 community forks, this repository holds a calculated health index of 97/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
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+33
STARS · LAST 30 DAYS
1
PER DAY
#298
MOST-STARRED Ruby
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +7 | +33 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +1 | +3 | +10 |
jb gained 33 stars in the last 30 days, about 1 a day, and now has 1.3K. It is about 10 years old and has averaged roughly 132 stars a year. It ranks #298 among Ruby repositories and #6,468 across all languages on GitHubRepo.
Trending Record
1
DAYS ON TRENDING
#9672
BEST RANK
Nov 1, 2026
FIRST APPEARANCE
Active
STATUS TODAY
jb has maintained a continuous presence across global trending indexes, peaking at #9672. Below is the 30-day activity profile:
💡 Overview
jb is an open-source project written in Ruby: A simple and fast JSON API template engine for Ruby on Rails.
Engineered for speed, consistency, and developer ease, it solves common hurdles in jbuilder, json, rails. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Ruby for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/amatsuda/jb.git
cd jb⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Ruby >= 3.1 with Bundler
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
jb coordinates its core functionality through a modular Ruby pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Autonomous AI Agents
Orchestrate intelligent workflows and tool-calling routines with jb.
Model Inference & Prompting
Integrate fast, local or cloud-hosted generative AI models directly into production code.
Context Memory & RAG
Augment language models with dynamic vector retrieval and structured project memory.
Developer Productivity
Automate repetitive engineering tasks, code generation, and test creation using AI agents.
🚀 Getting Started
Install jb using your package manager: `git clone https://github.com/amatsuda/jb.git`
Initialize your project workspace or configuration file for jb.
Import jb into your codebase or invoke it directly from your terminal.
Execute your test suite or run `jb --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Ruby, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
amatsuda/jb is currently ranked #6,468 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
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|---|---|---|---|---|
| #6,462 | eliaskosunen/scnlib | C++ | ★ 1.3K | Compare ↗ |
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| #6,466 | sindresorhus/pretty-bytes | JavaScript | ★ 1.3K | Compare ↗ |
| #6,466 | Shopify/job-iteration | Ruby | ★ 1.3K | Compare ↗ |
| #6,468 | amatsuda/jb This Project | Ruby | ★ 1.3K | |
| #6,468 | matthuhiggins/foreigner | Ruby | ★ 1.3K | Compare ↗ |
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Frequently Asked Questions
What does jb do? +
A simple and fast JSON API template engine for Ruby on Rails
Is jb actively maintained in 2026? +
Yes, jb is actively maintained. The latest code push was recorded on Oct 30, 2026 (2 days ago). It holds a calculated Maintenance Health Score of 97/100 (A+ rating) with 1,315 stars and 19 open issues.
What language is jb written in? +
The primary language is Ruby. Topics include: jbuilder, json, rails, template-engine.
How many stars does jb have? +
jb has 1,315 stars and 43 forks on GitHub.
How does jb rank among GitHub repositories? +
With 1,315 stars, amatsuda/jb is ranked #6,468 globally across all repositories tracked on GitHubRepo and #298 among Ruby projects.
What license is jb distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
