undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports
⚡ Executive Summary & Quick Facts
Authoritative Sourceundercover is undercover is an open-source project written in Ruby: undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), grodowski/undercover has accumulated 845 GitHub stars and 36 forks. It is written in Ruby, licensed under MIT, and ranks #9,475 globally. It is actively maintained with the latest commit recorded on Oct 26, 2026.”
| Repository | grodowski/undercover ↗ |
|---|---|
| Primary Category | cli |
| Language & Stack | Ruby |
| Software License | MIT |
| Community Traction | ★ 845 stars · ⑂ 36 forks · #9,475 globally |
| Maintenance | ● Active (Last commit: Oct 26, 2026) · 8 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: 88/100 · Grade AYes, undercover is actively maintained. Continuous telemetry recorded the last code commit on Oct 26, 2026 (18 days ago). Supported by 845 stars and 36 community forks, this repository holds a calculated health index of 88/100, reflecting regular maintenance (18 days ago) and healthy issue cadence.
Star History
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+0
STARS · LAST 30 DAYS
1
PER DAY
#465
MOST-STARRED Ruby
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +0 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +10 |
undercover gained 0 stars in the last 30 days, about 1 a day, and now has 845. It is about 9 years old and has averaged roughly 94 stars a year. It ranks #465 among Ruby repositories and #9,475 across all languages on GitHubRepo.
Trending Record
41
DAYS ON TRENDING
#2605
BEST RANK
Sep 27, 2026
FIRST APPEARANCE
Active
STATUS TODAY
undercover has maintained a continuous presence across global trending indexes, peaking at #2605. Below is the 30-day activity profile:
💡 Overview
undercover is an open-source project written in Ruby: undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports.
Engineered for speed, consistency, and developer ease, it solves common hurdles in cli, code-quality, coverage. 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/grodowski/undercover.git
cd undercover⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Ruby >= 3.1 with Bundler
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
undercover 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
Command-Line Automation
Execute automated build, deployment, and maintenance tasks directly from the terminal.
CI/CD Workflow Integration
Run non-interactive validation checks in GitHub Actions, GitLab CI, or local pre-commit hooks.
Developer Environment Setup
Standardize local engineering workstations with single-binary utility commands.
Scripting & Pipeline Orchestration
Chain complex multi-stage scripts with reliable error reporting and exits.
🚀 Getting Started
Install undercover using your package manager: `git clone https://github.com/grodowski/undercover.git`
Initialize your project workspace or configuration file for undercover.
Import undercover into your codebase or invoke it directly from your terminal.
Execute your test suite or run `undercover --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
grodowski/undercover is currently ranked #9,475 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #9,467 | stan-dev/math | C++ | ★ 846 | Compare ↗ |
| #9,467 | basecamp/console1984 | Ruby | ★ 846 | Compare ↗ |
| #9,467 | PolyMeilex/rfd | Rust | ★ 846 | Compare ↗ |
| #9,467 | UniversalRobots/Universal_Robots_ROS2_Driver | C++ | ★ 846 | Compare ↗ |
| #9,467 | getopenpost/openpost | TypeScript | ★ 846 | Compare ↗ |
| #9,475 | grodowski/undercover This Project | Ruby | ★ 845 | |
| #9,475 | sparklemotion/sqlite3-ruby | Ruby | ★ 845 | Compare ↗ |
| #9,475 | voloko/uki | JavaScript | ★ 845 | Compare ↗ |
| #9,475 | jgilfelt/android-mapviewballoons | Java | ★ 845 | Compare ↗ |
| #9,475 | dradis/dradis-ce | Ruby | ★ 845 | Compare ↗ |
| #9,475 | LibreSign/libresign | PHP | ★ 845 | Compare ↗ |
Frequently Asked Questions
What does undercover do? +
undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports
Is undercover actively maintained in 2026? +
Yes, undercover is actively maintained. The latest code push was recorded on Oct 26, 2026 (18 days ago). It holds a calculated Maintenance Health Score of 88/100 (A rating) with 845 stars and 8 open issues.
What language is undercover written in? +
The primary language is Ruby. Topics include: cli, code-quality, coverage, hacktoberfest, linter.
How many stars does undercover have? +
undercover has 845 stars and 36 forks on GitHub.
How does undercover rank among GitHub repositories? +
With 845 stars, grodowski/undercover is ranked #9,475 globally across all repositories tracked on GitHubRepo and #465 among Ruby projects.
What license is undercover distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
