> ## Documentation Index
> Fetch the complete documentation index at: https://docs.arrays.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Install on OpenAI Codex

> Use Arrays Skills inside OpenAI Codex agents.

## 1. Clone the Skills repo

```bash theme={null}
git clone https://github.com/ArraysData/arrays-skills.git
```

## 2. Include Skills as Codex instructions

When configuring your Codex agent, include the relevant `SKILL.md` files as part of the instruction set. Codex's markdown context format is directly compatible.

```bash theme={null}
# Example: load equity fundamentals skill into agent
codex agent create my-finance-agent \
  --instructions ./arrays-skills/skills/arrays-data-api-equity-fundamentals/SKILL.md \
  --env ARRAYS_API_KEY=$ARRAYS_API_KEY
```

<Tip>
  For agents that handle many domains, concatenate multiple `SKILL.md` files together, or use a meta-instruction that references the whole `skills/` directory.
</Tip>

## 3. Test it

Ask your Codex agent:

```
Give me the top 10 holdings of SPY and their weight.
```

The agent should pull from the `arrays-data-api-etf-fundamentals` Skill.

## Notes

* Codex doesn't yet support automatic Skill selection across multiple `SKILL.md` files — you may need to specify which Skill is active per agent.
* For multi-domain agents, see the [`arrays-skill-creator`](https://github.com/ArraysData/arrays-skills/tree/main/skills/arrays-skill-creator) template to compose custom Skills.