Vibe coding — AI-assisted, intent-driven development coined by Andrej Karpathy — is accelerating every phase of the SDLC and reshaping what 'shift left' means in practice. While AI tools speed up first drafts and reduce mechanical workload, they also introduce hidden risks: code that looks correct but contains subtle bugs, incorrect business logic, or quietly expanded attack surfaces from new dependencies. Nearly half of enterprises are responding by embedding security earlier in development. The key takeaway is that security must now begin before the first line of code, living in prompts and patterns. Teams should treat AI like a junior developer — capable but requiring rigorous oversight — and weave security guardrails into AI workflows intentionally rather than relying on end-stage gatekeeping.
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