The Fast Downward domain-independent classical planning system
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+10
STARS · LAST 30 DAYS
1
PER DAY
#749
MOST-STARRED C++
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +7 | +10 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +1 | +4 | +11 |
downward gained 10 stars in the last 30 days, about 1 a day, and now has 406. It is about 7 years old and has averaged roughly 58 stars a year. It ranks #749 among C++ repositories and #9,745 across all languages on GitHubRepo.
Trending Record
6
DAYS ON TRENDING
#4035
BEST RANK
Oct 13, 2026
FIRST APPEARANCE
Active
STATUS TODAY
downward has maintained a continuous presence across global trending indexes, peaking at #4035. Below is the 30-day activity profile:
💡 Overview
downward is an open-source project written in C++: The Fast Downward domain-independent classical planning system.
Engineered for speed, consistency, and developer ease, it solves common hurdles in classical-planning, planning. 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 C++ 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/aibasel/downward.git
cd downward⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C++20 compliant compiler (GCC 11+, Clang 13+, MSVC)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
downward coordinates its core functionality through a modular C++ 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
Production System Integration
Embed downward into C++ backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open GPL-3.0 license.
🚀 Getting Started
Install downward using your package manager: `git clone https://github.com/aibasel/downward.git`
Initialize your project workspace or configuration file for downward.
Import downward into your codebase or invoke it directly from your terminal.
Execute your test suite or run `downward --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C++, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
aibasel/downward is currently ranked #9,745 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #9,739 | github/auto-complete-element | JavaScript | ★ 407 | Compare ↗ |
| #9,739 | VSadov/Satori | C# | ★ 407 | Compare ↗ |
| #9,739 | decocms/studio | TypeScript | ★ 407 | Compare ↗ |
| #9,739 | sqdshguy/wreq-js | TypeScript | ★ 407 | Compare ↗ |
| #9,739 | Agent-Threat-Rule/agent-threat-rules | TypeScript | ★ 407 | Compare ↗ |
| #9,745 | aibasel/downward This Project | C++ | ★ 406 | |
| #9,745 | wwood/CoverM | Rust | ★ 406 | Compare ↗ |
| #9,745 | tbroyer/gradle-errorprone-plugin | Java | ★ 406 | Compare ↗ |
| #9,745 | CDrummond/lms-material | JavaScript | ★ 406 | Compare ↗ |
| #9,745 | chaos-polymtl/lethe | C++ | ★ 406 | Compare ↗ |
| #9,745 | marzent/XIV-on-Mac | Swift | ★ 406 | Compare ↗ |
Frequently Asked Questions
What does downward do? +
The Fast Downward domain-independent classical planning system
What language is downward written in? +
The primary language is C++. Topics include: classical-planning, planning.
Is downward actively maintained? +
Yes, the last recorded push was on Oct 16, 2026 with 20 open issues being tracked.
How many stars does downward have? +
downward has 406 stars and 210 forks on GitHub.
How does downward rank among GitHub repositories? +
With 406 stars, aibasel/downward is ranked #9,745 globally across all repositories tracked on GitHubRepo and #749 among C++ projects.
What license is downward distributed under? +
The repository reports a GPL-3.0 license. Always verify the repository LICENSE file for legal terms.
