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Create or update AgentSkills, especially when a user wants the agent to learn a reusable capability, workflow, integration, domain rule, team process, or tool usage pattern for future tasks.
Passed 13 of 17 test cases with the skill, and 5 of 17 without it.
and 10 more in the full report
10 fixed7 passed either way5 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
What file extension and archive format does `scripts/package_skill.py` create when packaging a skill directory into a shareable artifact?
| Checked | Without skill | With skill |
|---|---|---|
| Identifies the packaged file extension as .skill | Missed | Passed |
| States that the package artifact is a zip archive with a .skill extension | Missed | Passed |
The instructions your model reads when the skill loads.
This skill provides guidance for creating effective skills.
Skills are modular, self-contained packages that extend Codex's capabilities by providing specialized knowledge, workflows, and tools. Think of them as "onboarding guides" for specific domains or tasks—they transform Codex from a general-purpose agent into a specialized agent equipped with procedural knowledge that no model can fully possess.
Prefer a skill when the user wants the agent to keep a reusable capability instead of only completing the current turn. A skill is the durable form for user-taught behavior: it stores when the capability should trigger, how to use it, what constraints matter, how to recover from common failures, and which resources make execution reliable.
Create or update a skill when the user asks to:
Do not create a skill for one-off work that is unlikely to repeat. Finish the task directly when the user only needs a single answer, file, edit, or command result and there is no durable workflow to preserve.
Use memory instead of a skill for lightweight facts, preferences, and simple
test cases passed, vs 5 / 17 without
Published skills whose descriptions closely match this one, with their headline benchmark lift.
More skills from the same source and nearby in the registry, with their headline benchmark lift.