Probably that they used dynamic workflows to run long agent sessions to do the conversion, like Anthropic did when they ported Bun from Zig to Rust. Minimize Human in the Loop workflows, maximize Agents in the Loop workflows.
It’s the adverb of agentic, which is an adjective to describe something as having agency. I get it was a snark on the word, but it’s actually a legitimate pre-ai term.
Did you just wake up after a multi year slumber? Agentically means using tools. It means the workflow isn't predefined. It also spawned subagents.
That’s they used Claude code
Nope, that's the incorrect answer. One can do agentic development without using Claude. Any coding model with tools will do.