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What is pub.dev, and how does it serve as the genuinely official central package repository specifically for the entire Dart and Flutter ecosystem? What are the basic required steps to actually properly publish your own genuinely first package to pub.dev, including properly configuring its pubspec.yaml file? How should you properly write a genuinely comprehensive CHANGELOG.md file for your published package, and why does it genuinely matter quite a lot to consumers deciding whether to actually update to a genuinely newer version? How does pub.dev's own automated scoring system genuinely evaluate a given package's own overall quality, and what specific concrete steps can you genuinely take to actually improve your own particular package's own resulting score? How should you properly maintain backward compatibility for a genuinely widely used published package while still continuing to actively evolve its own overall API design and add genuinely new features over time? How can you properly set up an automated CI/CD pipeline specifically to automatically test, version, and publish a given package to pub.dev whenever a genuinely new release is actually properly ready?
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How does proper semantic versioning genuinely work for a published package, and why does correctly incrementing the genuinely correct specific version number component matter quite a lot for consumers of your package?

Intermediate

Answer

Semantic versioning follows a genuinely standard major dot minor dot patch numbering format, where incrementing the major version number properly indicates a genuine breaking change that could potentially require consumers to actually update their own existing code, incrementing the minor version number properly indicates a genuinely new backward compatible feature was added, and incrementing the patch version number properly indicates just a genuinely simple backward compatible bug fix, and correctly following this particular well established convention lets consumers of your package confidently understand exactly what kind of change a given specific new release actually genuinely contains before they actually genuinely decide to update to it.
version: 2.1.3
# major: 2 (breaking changes since version 1.x)
# minor: 1 (a new backward compatible feature was added)
# patch: 3 (a simple bug fix)
Real-world example A package maintainer properly releases version 2.0.0 specifically to clearly signal a genuine breaking API change, correctly letting consumers immediately understand they will likely need to carefully review that particular release's own changelog before simply blindly updating their own existing dependency.

Common follow-ups: What genuinely happens if a package maintainer accidentally introduces a genuine breaking change but only mistakenly increments the minor version number instead?;How do dependency version constraints, such as the caret symbol, actually genuinely relate to semantic versioning?

Flutter Plugin & Package Development;Dart Language Basics & Syntax
All 7 Publishing Packages on pub.dev questions