playground

playground is a skill for Claude Code, Codex from Arize-ai/phoenix. It costs 42 tokens per session (3,599 once invoked), scanned A, original, no licence file.

A prompt-editing guide for Phoenix, a tool for testing AI applications. It covers writing prompts and running prompt experiments over a dataset, which is a collection of test examples.

In plain words
What is it for?
Use it to write, edit, and compare prompts in the Phoenix prompt playground, including dataset-based experiments.
Why use it?
It gives a defined way to revise prompts and check their results across many examples rather than relying on one test.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/arize-ai/phoenix/playground
Any agent
npx skills add Arize-ai/phoenix --skill playground
Clone the repo
git clone --depth 1 https://github.com/Arize-ai/phoenix

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for playground

README.md
[![agentmods](https://agentmods.dev/badge/skills/arize-ai/phoenix/playground.svg)](https://agentmods.dev/skills/arize-ai/phoenix/playground)
Your own site
<a href="https://agentmods.dev/skills/arize-ai/phoenix/playground"><img src="https://agentmods.dev/badge/skills/arize-ai/phoenix/playground.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,599 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00042 $0.03599
Opus 5 $0.00021 $0.01800
Sonnet 5 $0.00008 $0.00720
Haiku 4.5 $0.00004 $0.00360

Measured 4d ago against content hash a69836f12190, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

playground scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

src/phoenix/server/agents/prompts/skills/playground/SKILL.md · 326 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 326 lines · 42 tokens per session scan A a69836f12190

Subscribe to this mod's changes

playground is a skill published in the GitHub repository Arize-ai/phoenix (11,311 stars, last pushed today), with no licence file. It adds 42 tokens to every session and 3,599 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.