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Rewrite README with usage, status and version guidance - #88

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Aug 8, 2026
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Rewrite README with usage, status and version guidance#88
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Part of codehaus-plexus/.github#58. Same skeleton as the merged pilots (codehaus-plexus/plexus-archiver#438, codehaus-plexus/plexus-i18n#37, codehaus-plexus/plexus-utils#332).

The old README explained how the split happened — the history of the extraction from plexus-utils — but never answered the question people actually arrive with: which line do I take?

That matters more here than in most repos, because the two are not interchangeable:

Line Requires Works under
3.x Java 8 Maven 3 and Maven 4
4.x Java 17 Maven 4 only

Taking 4.x when you needed 3.x fails at runtime under Maven 3, and nothing in the README said so. It now leads with that table, and adds the sentence I would give someone who turned up confused:

If you are here because upgrading plexus-utils 3 → 4 gave you a NoClassDefFoundError on Xpp3Dom, you want 3.x.

Also adds the dependency snippet and the Java baseline — this was one of only two READMEs in the org that mentioned a Java version at all, and it did so in prose rather than anywhere findable.

Ran mvn spotless:apply.

Adds a dependency snippet, the Java baseline and documentation links,
none of which were present.

The substantial addition is the 3.x versus 4.x guidance. The two lines
are not interchangeable - 4.x requires Java 17 and works only under
Maven 4, while 3.x is the straight extraction from plexus-utils 4 and
works under both - and choosing wrong is a bad afternoon. The README
described the split but never said which line to take.

Part of codehaus-plexus/.github#58
@slachiewicz slachiewicz added the documentation Documentation and site content label Aug 8, 2026
@slachiewicz
slachiewicz merged commit 51d60d5 into master Aug 8, 2026
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slachiewicz deleted the docs/readme branch August 8, 2026 19:22
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