Atmosphere/atmosphere
Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.
⚡ Executive Summary & Quick Facts
Authoritative Sourceatmosphere is atmosphere is an open-source project written in Java: Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), Atmosphere/atmosphere has accumulated 3,821 GitHub stars and 764 forks. It is written in Java, licensed under Apache-2.0, and ranks #3,602 globally. It is actively maintained with the latest commit recorded on Oct 14, 2026.”
| Repository | Atmosphere/atmosphere ↗ |
|---|---|
| Primary Category | a2a |
| Language & Stack | Java |
| Software License | Apache-2.0 |
| Community Traction | ★ 3.8K stars · ⑂ 764 forks · #3,602 globally |
| Maintenance | ● Active (Last commit: Oct 14, 2026) · 7 open issues |
| Target Audience | Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 92/100 · Grade AYes, atmosphere is actively maintained. Continuous telemetry recorded the last code commit on Oct 14, 2026 (29 days ago). Supported by 3,821 stars and 764 community forks, this repository holds a calculated health index of 92/100, reflecting regular maintenance (29 days ago) and healthy issue cadence.
Star History
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+2
STARS · LAST 30 DAYS
1
PER DAY
#220
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +2 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +38 |
atmosphere gained 2 stars in the last 30 days, about 1 a day, and now has 3.8K. It is about 16 years old and has averaged roughly 239 stars a year. It ranks #220 among Java repositories and #3,602 across all languages on GitHubRepo.
Trending Record
45
DAYS ON TRENDING
#792
BEST RANK
Sep 24, 2026
FIRST APPEARANCE
Active
STATUS TODAY
atmosphere has maintained a continuous presence across global trending indexes, peaking at #792. Below is the 30-day activity profile:
💡 Overview
atmosphere is an open-source project written in Java: Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.
Engineered for speed, consistency, and developer ease, it solves common hurdles in a2a, acp, agentic-ai. 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 Java 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/Atmosphere/atmosphere.git
cd atmosphere⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
atmosphere coordinates its core functionality through a modular Java 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 atmosphere.
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 atmosphere using your package manager: `git clone https://github.com/Atmosphere/atmosphere.git`
Initialize your project workspace or configuration file for atmosphere.
Import atmosphere into your codebase or invoke it directly from your terminal.
Execute your test suite or run `atmosphere --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
Atmosphere/atmosphere is currently ranked #3,602 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #3,597 | OliveTin/OliveTin | Go | ★ 3.8K | Compare ↗ |
| #3,598 | OpenHFT/Chronicle-Queue | Java | ★ 3.8K | Compare ↗ |
| #3,599 | IAHispano/Applio | Python | ★ 3.8K | Compare ↗ |
| #3,599 | AmintaCCCP/GithubStarsManager | TypeScript | ★ 3.8K | Compare ↗ |
| #3,601 | haml/haml | Ruby | ★ 3.8K | Compare ↗ |
| #3,602 | Atmosphere/atmosphere This Project | Java | ★ 3.8K | |
| #3,603 | libjxl/libjxl | C++ | ★ 3.8K | Compare ↗ |
| #3,604 | sofastack/sofa-jraft | Java | ★ 3.8K | Compare ↗ |
| #3,604 | HolmesGPT/holmesgpt | Python | ★ 3.8K | Compare ↗ |
| #3,606 | reactjs/react-docgen | TypeScript | ★ 3.8K | Compare ↗ |
| #3,607 | oddbird/susy | SCSS | ★ 3.8K | Compare ↗ |
Frequently Asked Questions
What does atmosphere do? +
Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.
Is atmosphere actively maintained in 2026? +
Yes, atmosphere is actively maintained. The latest code push was recorded on Oct 14, 2026 (29 days ago). It holds a calculated Maintenance Health Score of 92/100 (A rating) with 3,821 stars and 7 open issues.
What language is atmosphere written in? +
The primary language is Java. Topics include: a2a, acp, agentic-ai, ai-agents, anthropic.
How many stars does atmosphere have? +
atmosphere has 3,821 stars and 764 forks on GitHub.
How does atmosphere rank among GitHub repositories? +
With 3,821 stars, Atmosphere/atmosphere is ranked #3,602 globally across all repositories tracked on GitHubRepo and #220 among Java projects.
What license is atmosphere distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
