How to Master AI Coding Agents: From Vibe Coding to Agentic Engineering

Andrej Karpathy named it in February 2025: Vibe Coding.

You describe what you want, the LLM generates something, you vibe-check it, you ship. Fun. Fast. Surprisingly effective for prototypes.

Then, exactly one year later, Karpathy moved on.
He called the next step agentic engineering: humans stop writing code entirely. They direct AI agents that do it for them.

We are somewhere in that transition right now.

The tools are not toys anymore.
Claude Code scored 80.8% on SWE-bench Verified and became the most-used AI coding tool among professional engineers.

At Anthropic, engineers adopted Claude Code so heavily that roughly 90% of the code for Claude Code itself is now written by Claude Code.
Cursor reached $2 billion ARR in February 2026, doubling from $1 billion just three months earlier.
OpenCode hit 147,000 GitHub stars and 6.5 million monthly developers by April 2026.