Stop squashing your commits. You're squashing your AI too

2 jannesblobel 3 8/26/2025, 10:22:09 AM
Everyone keeps saying “keep your Git history clean.” Squash, rebase, linearize. It looks neat in the git log.

But here’s the thing: in 2025 our biggest collaborators aren’t just humans, they’re AI tools. And those tools need the messy history: the failed attempts, the typos, the bad refactors. That’s the context they learn from.

When we squash everything into a perfect history, we’re deleting the very breadcrumbs that could help an agent explain a bug, trace a regression, or warn us we’re about to repeat an old mistake.

“Clean history” makes reviewers happy today. But it’s technical debt for tomorrow’s AI-assisted development

Comments (3)

Hackbraten · 2h ago
I’m finding it difficult to agree with you without a concrete example.

How exactly would it help to have a commit that introduces a problem and then another one that fixes it? How does leaving in a bad refactor, failed attempt, or typo help the AI tool with anything?

jannesblobel · 1h ago
Think of a refactor where you tried one approach, rolled it back, then found the right fix. If you squash, all those failures vanish. With full history, an AI (or future you) can see the dead ends and spot patterns. I think that’s what Augment Code is doing with their Context Lineage idea: indexing the messy history so tools can explain how code evolved.

https://www.augmentcode.com/blog/announcing-context-lineage

skydhash · 21m ago
Today I downloaded the source code of a small utility to check its internals. You know what I was not interested in? The git history. Instead I just download the tarball from Debian.

Version history is only interesting if you’re doing archeology. And I would prefer seeing a squashed commit that introduce a complete change instead of going back and forth to get the complete picture (anyone with such messy history will introduce unrelated changes too).

As for failure, put that in some tracker, with an “abandoned” status.