The real problem is not that AI writes code quickly
The failure begins when a coding agent is asked to keep moving without a stable answer to what the product is, which behavior matters, and who gets to change the important rules. Each new session can sound reasonable while creating a slightly different app.
Six decisions to settle before the next coding task
You do not need a 60-page specification. You need enough authority that the next implementation request has a clear job and a clear boundary.
- What is the product trying to help one user or customer accomplish?
- Which objects, records, or events are important enough to own truth?
- Who can act, approve, change, or view each important part of the product?
- What workflow must work end to end before expansion?
- What may change in the future, but does not belong in the current build boundary?
- What must a coding agent report back instead of deciding silently?
Use one agent or a leader and executor deliberately
One capable agent can investigate and implement a bounded task. For larger work, a leader agent reads the product authority, chooses the next mission, and turns evidence from an executor into options for the builder. The point is not role-play. It is keeping discovery, product decisions, and code changes from collapsing into one uncontrolled conversation.
Know when to stop coding and decide
Pause when a change alters the product boundary rather than merely fixing implementation. Typical examples are adding a new user role, changing who owns a record, replacing an approval rule, introducing payments, or expanding a personal tool into shared collaboration. Ask for options in plain English, make the decision, then let the agent implement it.
Turn discoveries into controlled changes
Real implementation exposes facts the original plan missed. Do not rewrite the whole product after every discovery. Record what changed, decide whether it affects the governing architecture, and make a bounded adjustment. Bugs can be fixed inside the current authority; product changes deserve a new explicit decision.
Replace vague requests with bounded missions
A weak instruction says: “clean up the onboarding flow.” A bounded instruction says: “inspect the current onboarding paths, preserve account creation, report competing sources of truth, and do not change user roles or billing behavior without returning options.” The second request gives the agent room to work without giving it room to rewrite the product.
A small architecture sheet is better than another giant prompt
Before your next agent session, write the product promise, the important objects, the one workflow that must be trustworthy, the current scope boundary, and the decisions the agent may not make alone. That small sheet will do more for continuity than switching to another model mid-project.