I let an AI coding agent loose inside a real codebase, and yeah, it was impressive for about five minutes. Then the weird stuff started. A clean refactor broke auth, renamed things no one asked for, and quietly added a cost line item nobody mentions in demos. But it also saved hours on boring edits, test scaffolding, and repo search. That’s the truth most blog posts skip. AI coding agents are useful, but they are not magic, and they are definitely not free. If you’re thinking about shipping faster, this is the part you should read first today. The Quick Answer Yes, an AI coding agent can speed up delivery. No, it should not touch your codebase without guardrails. That’s the whole story in one breath. GitHub says its Copilot coding agent can research a repository, create an implementation plan, and make code changes on a branch before a pull request is opened. That sounds great, and honestly, sometimes it is.…