phoenix: Skill for Claude Code

.agents/skills/phoenix-pxi-playwright/SKILL.md

phoenix-pxi-playwright is a skill for Claude Code, Codex from Arize-ai/phoenix. It costs 68 tokens per session (2,430 once invoked), scanned A, original, no licence file.

A guide for writing and debugging Playwright end-to-end tests for Phoenix's PXI agent interface. End-to-end tests check a feature through the application as a user or connected system would use it.

In plain words
What is it for?
Adding PXI frontend tests, writing LLM-as-judge scoring rules, checking agent tool use, saving test runs as Phoenix experiments, and investigating failures.
Why use it?
It helps verify agent behaviour, tool calls, evaluation rules, saved test runs, and frontend changes without relying only on unit tests.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is Arize-ai/phoenix's own configuration. It tells Claude Code and Codex how to work on phoenix itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything phoenix configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Arize-ai/phoenix. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Arize-ai/phoenix/main/.agents/skills/phoenix-pxi-playwright/SKILL.md
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 phoenix-pxi-playwright

README.md
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Your own site
<a href="https://agentmods.dev/skills/arize-ai/phoenix/phoenix-pxi-playwright"><img src="https://agentmods.dev/badge/skills/arize-ai/phoenix/phoenix-pxi-playwright/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for phoenix-pxi-playwright

Your own site · 80×15
<a href="https://agentmods.dev/skills/arize-ai/phoenix/phoenix-pxi-playwright"><img src="https://agentmods.dev/badge/skills/arize-ai/phoenix/phoenix-pxi-playwright.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,430 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Rogue Agent · line 183
    Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.
    Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
How audits are shown
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 5.1 $0.00068 $0.02430
Opus 5 $0.00034 $0.01215
Sonnet 5 $0.00014 $0.00486
Haiku 4.5 $0.00007 $0.00243

Measured 9d ago against content hash fc7e098f5df2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

phoenix-pxi-playwright 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 9d 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.

.agents/skills/phoenix-pxi-playwright/SKILL.md · 184 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 9d ago First seen · 184 lines · 68 tokens per session scan A fc7e098f5df2

Subscribe to this mod's changes

phoenix-pxi-playwright is a skill published in the GitHub repository Arize-ai/phoenix (11,385 stars, last pushed today), with no licence file. It adds 68 tokens to every session and 2,430 once invoked, about $0.0003 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.