@goan999999: Codex 5.6: The True 90% Efficiency Gap — Master Plan + Steer + Parallel. Do you use Codex by sending a single prompt and waiting? If the direction is wrong, all previous tokens, code, and time are wasted.

Codex 5.6: How to Create a 90% Efficiency Gap with Ordinary Users by Mastering Plan + Steer + Parallel

Do you use Codex by “sending one prompt and then waiting for it to run to completion”?

If the direction is wrong, all the tokens, code, and time spent are wasted.

Professional engineers, when doing vibe coding, treat Codex as an engineering team that can be dispatched at any time.

Plan Complex Tasks Before Execution

For architecture migration, refactoring, or full-stack features, don’t let it start writing code immediately. First, have Codex output a plan, including risks, steps, and acceptance criteria. Proceed only after confirmation.

Enter this directly:

“First, do not modify the code. Please analyze the current requirements and project structure, and output a concise execution plan. The plan should include objectives, key decisions, modification scope, risk points, and acceptance criteria. You may judge non-critical details yourself, but present key architectural choices for my confirmation. Begin execution only after the plan is confirmed, and perform an actual runtime verification upon completion.”

Steer Immediately When You Detect a Wrong Direction

The most wasteful use of tokens is continuing to let an agent run to completion when you already know it has misunderstood the task.

Codex supports changing the execution direction during a run. You are responsible for steering, and the agent handles execution.

Just enter this prompt:

“Pause the current implementation direction. Do not continue expanding modifications. Preserve the parts already completed correctly. Re-evaluate my newly added requirements and adjust the plan from the current state to continue execution. Do not redo everything from the start.”

Parallelize When Possible; Don’t Queue Tasks Serially

Frontend work, testing, bug troubleshooting, documentation—these don’t always depend heavily on each other. Don’t let a single agent handle them one after another.

Codex supports multi-agent parallel execution and worktrees, allowing multiple tasks to advance simultaneously in isolated workspaces, reducing interference and code conflicts.

When handling complex tasks, you can use:

“Please split the current task into subtasks that can be executed independently. Identify parts with weak dependencies and process them in parallel. Use isolated workspaces or worktrees for different code modifications. Afterward, consolidate the changes, check for conflicts, and run a full test suite. Do not let tasks that can run in parallel wait serially.”

Using Codex isn’t just about making it do more at once; it’s about continuously deciding during its work process:

When to plan first? When to parallelize? When to correct course immediately?

govin.eth | G哥 (@goan999999): Modifying these 3 permission settings in Codex 5.6 can reduce useless confirmations by 80% and directly improve agent execution efficiency by 90%.

Many people think giving an agent more permissions makes it more efficient, but it often leads to either frequent confirmation pop-ups or accidental execution of unintended actions.

However, the approach of true professionals is to set clear Autonomy Boundaries for Codex.

The core consists of just 3 settings:

1️⃣