The Planner → Executor pattern is the backbone of agent systems.

Here’s the breakdown:

🧠 1. Planner (Bob in my case)

Responsible for: - analysing the goal
- breaking it down
- generating a structured plan
- deciding which tools to use
- describing expected outputs

In English: thinks before acting.

🔧 2. Executor (Chad)

Responsible for: - running tools
- performing steps
- modifying files
- running scripts
- catching errors
- reporting results

In English: does the work.

🔁 3. Two-way feedback loop

After executing steps: - executor reports results
- planner revises plan
- executor keeps running

This is what lets an agent recover from errors.

🧩 4. Why this works

Humans do this instinctively:

"Let me think... ok I’ll do X, then Y, then Z."

LLMs don’t — unless you explicitly build this structure.

🚀 5. Why I built Bob + Chad this way

Because it mirrors how real engineering teams work:
one senior engineer + one junior engineer.

And it works unbelievably well.