How to write an effective agent role for Codex
Define a focused agent role through its objective, evidence, tools, boundaries, handoff, and stopping condition.
Meet the author
Editor & author
Abdessalam is the editor of AboutCodex. He writes practical guides to project briefs, reusable instructions, and reviewable Codex workflows, and curates useful resources for the publication.
The article index
Showing 1–8 of 10 articles · Getting started
Clear filtersDefine a focused agent role through its objective, evidence, tools, boundaries, handoff, and stopping condition.
Diagnose discovery, context, tool, permission, environment, and validation problems without adding random instructions.
Inspect a skill package, choose the correct project or personal scope, install it, and verify that Codex can discover it.
Choose the right Codex building block by deciding whether you need a one-time request, durable project context, a reusable procedure, connected tools, or an installable bundle.
Check instruction scope and conflicts before rewriting AGENTS.md.
Check the workspace, sign-in, instructions, and validation evidence in a useful order.
A practical learning path from a clear brief to a small, reviewed change.
A copyable brief that gives Codex the outcome, context, constraints, and validation it needs.
THE ABOUTCODEX BRIEFING
One workflow to try, one change explained, and one resource to keep. Planned weekly.
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