CODEX SKILLS

Reusable workflows.
Ready to install.

Step-by-step installation guidance and a growing library of skills you can download and use in Codex.

HOW CODEX SKILLS WORK

Give Codex a workflow it can reuse.

A skill packages instructions, examples, and supporting resources for a repeatable task. Install a shared skill once, then ask Codex to use it whenever that workflow comes up.

INSTALL A SHARED SKILL

From ZIP file to ready-to-use skill

No terminal commands are required. Do the installation inside a Codex task.

1
Download the skill ZIP
Save the ZIP file somewhere you can easily find it. Leave it compressed.
2
Attach it to a Codex task
Start a new task, select the attachment button, and choose the skill ZIP.
3
Ask Codex to use Skill Installer
Send the prompt below with the file attached. The $skill-installer mention makes the workflow explicit.
4
Wait for confirmation
Codex will report the installed skill name and when it is ready to use, typically on the next turn.

Codex · New task

SCREEN 1 · ATTACH

New taskAdd the skill ZIP to this task

skill-name.zipZIP · READY TO INSTALL

+Ask Codex anything↑

Attach the unopened ZIP to a new task.

Codex · Skill installation

SCREEN 2 · ASK

⌁ skill-name.zip

$skill-installer Install the attached skill ZIP…

✓

Skill installed

Codex confirms the skill name and when it will be available to use.

Ask for Skill Installer and wait for the confirmation.

COPY THIS PROMPT

$skill-installer Install the attached skill ZIP. Verify the installed skill name and confirm when it will be available to use.

AVAILABLE SKILLS

Download a skill

This library will grow as new skills are added. Each download includes the complete workflow and its supporting resources.

GENAI VALUEPROOF ROI CASE

AUDITABLE VALUE CASE Evidence → Value Assumptions tracked · outputs verified

QUICK ESTIMATE EVIDENCE-GRADE

FROM GENAI CLAIMS TO AN AUDITABLE BUSINESS CASE

FREE DOWNLOADZIP · 30 KB

GenAI ROI Calculator Skill

I built this skill to guide a GenAI business case from the first interview through a verified assessment. It evaluates the available evidence, recommends the right level of rigor, and completes the GenAI ValueProof workflow while preserving the assumptions and sources behind every result.

01
Guided discovery by ChatGPT Voice, dictation, or text
02
Quick Estimate or Evidence-Grade mode selection
03
Durable assumption, evidence, and project records
04
Verified PDF and CSV exports for review and comparison

EVIDENCE CONTROL

App defaults and unsupported claims are never treated as user facts, and critical safety, legal, security, privacy, or quality failures block a scale recommendation.

Download GenAI ROI Skill Explore GenAI ValueProof →

Example parent teaching guide showing a multiplication problem broken into three visual steps

EXAMPLE PARENT VISUAL GUIDE

FREE DOWNLOADZIP · 971 KB

Math Packet Skill

I built this skill to act as an early-childhood math development coach. It reviews a child’s completed work, identifies where they may need more support, and creates a personalized six-page practice packet.

01
A visual teaching guide for parents
02
Practice matched to the child’s current level
03
Short, focused sessions designed for about 10 minutes
04
Learning-history tracking to guide future packets

BUILT-IN GUARDRAIL

No word problems are introduced until the child demonstrates mastery and the parent approves a specific example.

Download Math Packet Skill Learn about skills ↗