How are you centralising AI for development at your company?

I'm asking this because I'm seeing some frustrating patterns and if I may be bold, I think my answer is the correct one.

Here's one I'm seeing: its the SDLC agent pattern and I think its wrong.

Step 1: you have good AGENTS.md documentation for your code and other principles. (this is good)

Step 2: There's a somewhat strict workflow and steps enforced like planner agent, reviewer agent, critique agent and directly create a PR from a ticket. Every human intervention here is considered an anti-pattern.

I'd like it to be as simple as having documentation and giving developer full freedom with choice of harness, tools (MCP) and just make the pull request.

What's the logic behind the multi step planner, reviewer, critique agents?