Version-aware by default
Recommendations are cumulative through the detected release, from Java 8 through Java 25.
Agent Plugins 1.0 · Portable Agent Skill
Modern Java advice,
bounded by your JDK.
The java.evolved agent plugin detects the Java version your project actually targets, then recommends only the final language features, APIs, and practices that version supports.
$ detect_java_version.py .
source maven.compiler.release
target Java 21
preview disabled
✓ Guidance bounded to Java 21
It reads the contract, not just the machine.
An installed JDK does not prove what a project can compile. The detector prioritizes explicit build targets and keeps lower-confidence evidence visible.
Maven
Gradle
Toolchains
Version files
CI
Runtime
Effective target
with source, priority, and conflicts
Useful guardrails, built in.
Preview stays opt-in
Preview and incubating features are never presented as production-ready defaults.
Made for real Java work
Use it for implementation, review, refactoring, upgrades, concurrency, testing, security, and API design.
Portable, vendor-neutral
The package follows the open Agent Plugins 1.0 and Agent Skills specifications.
How it works in a session.
-
1
Detect
The agent inspects the project or module's compilation target and reports conflicting configuration.
-
2
Bound
It loads core practices plus final capabilities from the target release and every earlier release.
-
3
Recommend
It writes, reviews, or modernizes code without silently raising your minimum Java version.
Try asking
“Review this service and suggest modern Java improvements without changing its Java 17 target.”
Install it in your agent.
Copilot CLI supports the complete Agent Plugins package. Claude Code and Codex CLI use the portable modern-java skill included in the package.