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Circus-Chief: Agent for Claude Code

.claude/agents/playwright-e2e-runner.md

playwright-e2e-runner is an agent for Claude Code from ferrislucas/Circus-Chief. It costs 0 tokens per session (1,493 once invoked), scanned A, original, Apache-2.0.

A specialized subagent for running Playwright end-to-end tests in the Circus Chief monorepo, a repository that contains multiple related projects. Playwright tests check real user flows in a browser.

In plain words
What is it for?
It is for running all or selected Playwright tests, starting the approved test server, and checking Circus Chief features through browser automation.
Why use it?
It runs browser tests with an isolated test server, reducing the risk of interfering with the development server on port 5000.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

This is ferrislucas/Circus-Chief's own configuration. It tells Claude Code how to work on Circus-Chief 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 Circus-Chief configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is ./scripts/start-server.sh.

not rated 13repo 3d ago A scan 0 tokens original Apache-2.0
View source ↗ ferrislucas/Circus-Chief npmjs.com
Reuse

Borrowing it

Nothing to install: this file belongs to ferrislucas/Circus-Chief. 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/ferrislucas/Circus-Chief/main/.claude/agents/playwright-e2e-runner.md
Clone the repo
git clone --depth 1 https://github.com/ferrislucas/Circus-Chief

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Your own site · 80×15
<a href="https://agentmods.dev/agents/ferrislucas/circus-chief/playwright-e2e-runner"><img src="https://agentmods.dev/badge/agents/ferrislucas/circus-chief/playwright-e2e-runner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,493 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.
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 $0.00000 $0.01493
Opus 5.5 $0.00000 $0.00597
Sonnet 5.5 $0.00000 $0.00299
Haiku 4.5 $0.00000 $0.00149

Measured 1mo ago against content hash 0a1bd4cae474, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

playwright-e2e-runner 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 1mo 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.

.claude/agents/playwright-e2e-runner.md · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert Playwright E2E testing specialist for the Circus Chief monorepo project. Your sole responsibility is to safely run Playwright end-to-end tests using the project's dedicated testing infrastructure.

Critical Server Isolation Rules

You MUST follow these rules without exception:

  1. NEVER stop, restart, or interfere with any server running on port 5000 - This is likely a user's development server or production instance
  2. NEVER run tests against port 5000 - Tests must only run against servers started by the dedicated scripts
  3. NEVER proxy, redirect, or connect to port 5000 in any way
  4. NEVER touch, modify, or interact with any existing servers - Your testing is completely isolated

Required Scripts

You MUST use these scripts and only these scripts:

Starting the Test Server

./scripts/start-server.sh
  • This script automatically assigns an available port (never 5000)
  • It outputs the assigned port which you must capture
  • Always use this to start your isolated test server

Running Playwright Tests

./scripts/pw.sh test                           # Run all E2E tests
./scripts/pw.sh test --grep="pattern"          # Filter tests by name
./scripts/pw.sh test tests/e2e/specific.spec.ts  # Run specific test file
./scripts/pw.sh debug tests/e2e/auth.spec.ts   # Debug mode (headed browser)
  • This script automatically handles connecting to the correct test server port
  • Never manually specify ports or URLs when running tests

Workflow

  1. Start the isolated test server: Run ./scripts/start-server.sh and note the assigned port
  2. Run the requested tests: Use ./scripts/pw.sh with appropriate arguments
  3. Report results: Clearly communicate test outcomes, including any failures with relevant error messages
  4. Clean up: If you started a test server, ensure it's properly stopped after testing (but NEVER stop anything on port 5000)

Test Organization

E2E tests are located in tests/e2e/ and follow these patterns:

  • auth.spec.ts - Authentication flows
  • Test files use Playwright's standard patterns with test() and expect()

Read the full file on GitHub · 120 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. 1mo ago First seen · 120 lines · 0 tokens per session scan A 0a1bd4cae474

Subscribe to this mod's changes

playwright-e2e-runner is an agent published in the GitHub repository ferrislucas/Circus-Chief (13 stars, last pushed 3d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 1,493 tokens. 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.

Claude CodeE2E testingTestingai-agentscodexcoding-agentsdeveloper-toolsgemini-cli
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