"Starting with Git 3.0, the default branch for new repositories will no longer be master, but main - aligning Git with the modern tooling ecosystem and long-standing community requests. This isn't just a symbolic rename. Git 3.0 arrives with several deep technical changes that will reshape workflows, security, and long-term compatibility across the entire developer ecosystem. Welcome to the post-master world."
"Yes - the main migration is the headline. But the real story? Git 3.0 contains several major under-the-hood upgrades developers should prepare for. Let's break them down. For 19 years, Git has relied on SHA-1, a hash once considered secure - until attacks proved otherwise. Git already introduced optional SHA-256 support in past releases, but Git 3.0 makes it the default. git hash-object --hash=sha256 README.md Older SHA-1 hashes still work."
Git 3.0 changes the default branch for new repositories from master to main, aligning the CLI with platforms that already adopted main. The change follows earlier community and platform migrations and was confirmed in Git 2.52 before becoming the new default. Most developers will see no disruption, but organizations with large monorepos, legacy CI/CD, or scripts hard-coded to master may encounter breaking issues. Git 3.0 also makes SHA-256 the default hashing algorithm while preserving SHA-1 compatibility. The release introduces deeper technical changes that affect workflows, security posture, and long-term compatibility, so preparation and testing are advised.
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