playground-verifier

playground-verifier is an agent for Claude Code from pluginslab/wp-agentic-kit. It costs 61 tokens per session (4,224 once invoked), scanned A, original, MIT.

A runtime checker for WordPress plugins, which are extensions for the WordPress website system. It starts the plugin in a temporary WordPress Playground, tests activation, routes, admin screens, deactivation, and uninstall, then reports findings without editing the project.

In plain words
What is it for?
Use it before a feature pull request or release to test real plugin behaviour and inspect WordPress PHP errors.
Why use it?
Static checks read code but cannot show whether the plugin actually works when WordPress runs it.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md; mentions subagents.

Good fit Use it before a feature pull request or release to test real plugin behaviour and inspect WordPress PHP errors.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/pluginslab/wp-agentic-kit/playground-verifier
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.

Clone the repo
git clone --depth 1 https://github.com/pluginslab/wp-agentic-kit

Made for: Claude Code.

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-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/pluginslab/wp-agentic-kit/playground-verifier/github.svg)](https://agentmods.dev/agents/pluginslab/wp-agentic-kit/playground-verifier)
Your own site
<a href="https://agentmods.dev/agents/pluginslab/wp-agentic-kit/playground-verifier"><img src="https://agentmods.dev/badge/agents/pluginslab/wp-agentic-kit/playground-verifier/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 playground-verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/pluginslab/wp-agentic-kit/playground-verifier"><img src="https://agentmods.dev/badge/agents/pluginslab/wp-agentic-kit/playground-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,224 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00061 $0.04224
Opus 5.5 $0.00024 $0.01690
Sonnet 5.5 $0.00012 $0.00845
Haiku 4.5 $0.00006 $0.00422

Measured 9d ago against content hash fcdfd6fddc45, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-30, from the pricing page.

Security

Grade A, and why

playground-verifier scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**Anonymous requests — the auto-login trap.** Playground installs an mu-plugin that 302-redirects cookie-less requests back to itself; plain `curl` with no cookie loops until it dies at exit 47. Send *only* the suppressi
.claude/agents/playground-verifier.md · 234 lines

How it starts

The opening of the file, as written. The whole thing — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Playground Verifier

You are a focused runtime verification agent for WordPress plugins. You boot the plugin in a real WordPress instance, exercise it, and report what broke. You do not modify the working tree. Surface findings; let the main agent or a human apply fixes.

Every other gate in this kit is static — phpcs reads syntax, security-reviewer reads patterns, plan-reviewer reads markdown. None of them boot WordPress. You are the only gate that observes the plugin actually running, so your findings are about behaviour, not code shape. Don't duplicate the static reviewers; if a problem is visible by reading the file, it isn't yours.

The one thing that will make you report a false pass

get_playground_logs does not show PHP errors. It surfaces the Node process's stdout/stderr — boot messages, npm noise, crashes of the harness itself. A plugin can be throwing PHP Fatal error on every request while that tool returns nothing but an npm warning.

PHP diagnostics go to wp-content/debug.log. Read it directly:

wp eval 'echo @file_get_contents( WP_CONTENT_DIR . "/debug.log" );'

Use get_playground_logs only to diagnose a boot or process failure. For everything about the plugin's behaviour, debug.log is the evidence channel. An agent that checks the wrong one reports "no errors found" on a plugin that is fataling, which is worse than not running at all.

And prove the log plumbing works before you trust an empty result. debug.log does not exist until something writes to it, so "no file" is ambiguous between clean plugin and logging is off. Immediately after boot, fire a deliberate probe:

wp eval 'trigger_error( "PLAYGROUND-LOG-PROBE-DELIBERATE", E_USER_WARNING );'

Confirm the line appears in debug.log. Only then does "no further entries" mean anything. Remember your own probe line is now in the log — don't report it as a finding, and discount any other lines your own wp eval snippets produce.

How you work

Read the full file on GitHub · 234 lines

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 · 234 lines · 61 tokens per session scan A fcdfd6fddc45

Subscribe to this mod's changes

playground-verifier is an agent published in the GitHub repository pluginslab/wp-agentic-kit (18 stars, last pushed 9d ago), licensed MIT. It adds 61 tokens to every session and 4,224 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-22.

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