OpenAI Codex
Audience: Users running OpenAI Codex (or similar agents without a read_url_content
tool). No programming experience required after the one-time setup.
Unlike Antigravity, Codex may not automatically follow internal cross-references in skill files, so all five URLs are provided upfront in the system prompt.
Prerequisites
Section titled “Prerequisites”| Requirement | How to get it |
|---|---|
| OpenAI Codex access | platform.openai.com |
Python 3.10+ with aggeodata | See below |
| Internet access | Required to fetch skill files |
pip install "aggeodata[download,mcp] @ git+https://github.com/anaguilarar/aggeodata.git" s3fs zarrStep 0 — System prompt
Section titled “Step 0 — System prompt”Each skill page includes the system prompt to paste into Codex. Find it in the Codex tab of the skill you want to use — for example, GCF Pipeline → Codex.
Antigravity vs Codex
Section titled “Antigravity vs Codex”| Antigravity | Codex | |
|---|---|---|
| URL fetch tool | read_url_content (built-in) | curl / wget / web tool |
| URLs in system prompt | 5 (all skills upfront) | 5 (all skills upfront) |
| Sub-skill loading | Pre-fetched at task start | Pre-fetched at task start |
Troubleshooting
Section titled “Troubleshooting”| Symptom | Fix |
|---|---|
| Codex cannot access URLs | Enable internet access in Codex settings |
ModuleNotFoundError: aggeodata | Run the pip install command above |
| Agent invents code instead of following the skill | Verify the system prompt was saved and the fetch succeeded |