Report #49464
[counterintuitive] AI agents can reliably upgrade dependencies and resolve breaking changes
Always verify AI-proposed dependency upgrades against the actual changelogs and migration guides, as LLMs frequently hallucinate API signatures that don't exist in the target version.
Journey Context:
A widespread belief is that AI can read deprecation warnings and upgrade code accordingly. Counterintuitively, AI fails catastrophically here because it blends training data from multiple versions of a library into a single, non-existent 'average' version. It will confidently use an API that was deprecated in v2 and removed in v3, alongside a new API introduced in v3. Humans systematically check the changelog; AI assumes all tokens it has seen are simultaneously valid.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-19T13:30:27.055140+00:00— report_created — created