ReactiveX/RxJava

GitHub
https://github.com/ReactiveX/RxJava

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

  • flow
  • java
  • reactive-streams
  • rxjava
Stars:
48.2k
Language:
Java
Default branch:
4.x
Last scored:
Overall

At a glance

Rank
#140 of 401
Top 35% · #4 of 28 Java repos
Checks passed
8 of 17
Full list below
Best set up for
Claude Code
Score 76.7
Needs most work for
Cursor
Biggest fix: Cursor rules (.cursor/rules) (+11.5 pts)

What it has

What it's missing

What to fix first

Pick an AI agent

Showing fixes for Claude Code

  1. 1
    AGENTS.md / CLAUDE.md
    Add an AGENTS.md covering project goals, layout, setup commands, and conventions. Aim for 800+ chars of real guidance (not boilerplate).
    +13.2 pts
  2. 2
    Pre-commit / git hooks
    Set up pre-commit (.pre-commit-config.yaml), husky, or lefthook to run format+lint on every commit.
    +5.3 pts
  3. 3
    Reproducible dev env
    Add a Makefile or devcontainer or Dockerfile so the agent can set up the project in one command.
    +3.6 pts

Score for each AI agent

Each agent weighs the checks by its own docs. Under each score are its top three. How each agent is scored →

Claude Code
#153 of 401
76.7
  • ✗AGENTS.md / CLAUDE.md
  • ✓Test suite
  • ~Reproducible dev env
Codex
#154 of 401
74.6
  • ✗AGENTS.md / CLAUDE.md
  • ✓README
  • ✓Test suite
Aider
#87 of 401
74.2
  • ✗.aider.conf.yml
  • ✓Linter / formatter config
  • ✓Test suite
Devin
#138 of 401
73.6
  • ~Reproducible dev env
  • ✓Dependency manifest
  • ✓Test suite
Pi
#161 of 401
72.3
  • ✗AGENTS.md / CLAUDE.md
  • ✓Test suite
  • ✓Linter / formatter config
Kimi Code CLI
#170 of 401
72.1
  • ✗AGENTS.md / CLAUDE.md
  • ✓Test suite
  • ✓Dependency manifest
OpenHands
#126 of 401
70.6
  • ✓CI configuration
  • ✓Dependency manifest
  • ~Reproducible dev env
Gemini CLI
#131 of 401
69.5
  • ✗GEMINI.md
  • ✓README
  • ✓Test suite
Cursor
#143 of 401
68.6
  • ✗Cursor rules (.cursor/rules)
  • ✓README
  • ✓Type configuration

Does ReactiveX/RxJava have agent instructions?

An AGENTS.md (or CLAUDE.md) at the root tells AI coding agents how to build, test and work in the repo. A few agents also read a file of their own.

AGENTS.md / CLAUDE.md
None at the root (no AGENTS.md, CLAUDE.md, AGENT.md, .claude/CLAUDE.md or .claude/AGENTS.md)
Agent-specific files
None: no GEMINI.md, .cursor/rules, .openhands/setup.sh, .aider.conf.yml or .agents/skills
Repos that have one
19 of 28 Java repos · 221 of 401 repos on the leaderboard · See examples →
Get a starter AGENTS.md

From the files the checks found. Fill in the commands, then commit it at the root.

# AGENTS.md

Guidance for AI coding agents working in ReactiveX/RxJava. RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM. Written mainly in Java.

## Where things are

- Dependencies are declared in `build.gradle`.
- Tests live in `src/test`.
- Lint and format rules are configured in `config/checkstyle/checkstyle.xml`.
- CI is defined in `.github/workflows`; read it for the exact install, lint and test steps.
- Use the `./gradlew` wrapper, not a system install.
- Follow the conventions in `CONTRIBUTING.md`.

## Commands

<!-- Fill in the exact commands CI runs. -->
- Install: TODO
- Test: TODO
- Lint: TODO

All 17 checks · 8 passed

No .agents/skills/<name>/SKILL.md
No agent instructions file found
.aider.conf.yml· 0% pass
No .aider.conf.yml at repo root
CI configuration· 100% pass
11 GitHub Actions workflows
CONTRIBUTING guide· 100% pass
Guide present
No .cursor/rules/*.mdc or .cursorrules
Manifest present
Has gradlew
GEMINI.md· 0% pass
No GEMINI.md at repo root
License file· 100% pass
License present
No .openhands/setup.sh
No pre-commit / husky / lefthook found
README· 100% pass
README detailed (36,952 characters)
Manageable size· 80% pass
956 files
Test suite· 100% pass
Found /src/test
Type configuration· 100% pass
Typed language (Java/Kotlin)

How ReactiveX/RxJava compares

vs leaderboard average
5.7 pts above
Average 66.8
vs Java average
11.3 pts above
Average 61.2
Stars among Java repos
#5 of 28

Missing here, and how many repos have it

  • Pre-commit / git hooks · passed by 29% of leaderboard repos, 4% of Java repos
  • Skills (.agents/skills) · passed by 17% of leaderboard repos, 4% of Java repos
  • Cursor rules (.cursor/rules) · passed by 4% of leaderboard repos, 0% of Java repos

One fix for the most agents: AGENTS.md / CLAUDE.md would raise the score for all 9 agents, by up to 13.3 points.

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