On the bundled sample: 6 findings (6 errors, 0 warnings) in 1 file from 18 rules, including setup-java oracle, an Oracle registry image and SDKMAN 21.0.8-oracle.

Who it’s for
For platform, DevOps and Java teams who must show where Oracle Java runs before an Oracle Java audit or a move to Temurin.

What breaks, and when
The free NFTC window for Java 21 closed on 2026-09-16: any CI job, image or SDKMAN line still pulling Oracle JDK 21 is outside it, and Java 8 and 11 Oracle builds are OTN, free for development and test only.

What you get
• SKILL.md, an offline Node scanner and the 18-rule table

See it first
The real output of the bundled example is on getreadystack.com/skills/oracle-jdk-license-check/ — free, no sign-up, so you see what it finds before you pay.

Install in 30 seconds
Unzip into ~/.claude/skills/, then ask Claude Code: “Oracle sent our company a letter about Java licensing. Are we pulling Oracle’s JDK anywhere in this repo’s builds or CI, and what free build should we switch to? Don’t edit anything yet.”. Needs Node 16+.

What it does not do
Not legal advice; it does not read your Oracle contract or servers.

FAQ
Q: How is this different from asking Claude without the skill?
A: The skill carries a dated rule table and a scanner that reads every file, so Claude quotes the exact date and line instead of guessing from memory.
Q: How do I get the files?
A: In your Whop library after paying: the lesson “oracle-jdk-license-check.zip”.