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.
npx skills add joinwell52-AI/CodeFlowMu-open --skill browser-playwright-checkgit clone --depth 1 https://github.com/joinwell52-AI/CodeFlowMu-openWrote 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.
[](https://agentmods.dev/skills/joinwell52-ai/codeflowmu-open/browser-playwright-check)<a href="https://agentmods.dev/skills/joinwell52-ai/codeflowmu-open/browser-playwright-check"><img src="https://agentmods.dev/badge/skills/joinwell52-ai/codeflowmu-open/browser-playwright-check/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.
<a href="https://agentmods.dev/skills/joinwell52-ai/codeflowmu-open/browser-playwright-check"><img src="https://agentmods.dev/badge/skills/joinwell52-ai/codeflowmu-open/browser-playwright-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00045 | $0.00462 |
| Opus 5.5 | $0.00018 | $0.00185 |
| Sonnet 5.5 | $0.00009 | $0.00092 |
| Haiku 4.5 | $0.00005 | $0.00046 |
Grade A, and why
browser-playwright-check 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.
What it actually says
Browser Playwright Check
When to use
Use when the task requires browser-visible evidence or interactive web verification.
Typical triggers:
- Open a local HTML file or dev-server URL in a browser.
- Click through UI, fill a form, test navigation, or inspect page state.
- Capture screenshots for evidence.
- Verify responsive layouts across desktop and mobile viewports.
- Check canvas, media, animation, or visual nonblank rendering.
- Diagnose Panel or web app behavior that cannot be proven by static code reading.
Rules
- Prefer an existing project test command if it already uses Playwright.
- If no test exists, write the smallest ad hoc Playwright check needed for evidence.
- Use stable selectors where available; otherwise use visible text, roles, or narrow DOM queries.
- Verify behavior, not only file existence.
- Capture evidence: command output, screenshot paths, viewport sizes, URL, and pass/fail notes.
- Keep browser automation scoped to local/dev URLs or explicit user-provided URLs.
- Do not require network access unless the task explicitly depends on a remote page.
- Do not hide flaky or unverified criteria in the final report.
Required output
When reporting, include:
- URL or local file opened.
- Viewports tested.
- Interactions performed.
- Evidence paths for screenshots or traces when captured.
- Any untested or flaky criteria.
Forbidden actions
- Do not use Playwright as a substitute for code review when source inspection is required.
- Do not perform destructive UI actions unless explicitly authorized.
- Do not log secrets, session tokens, cookies, or private form data.
- Do not mark a visual/UI task done without at least one browser-visible verification when a browser can run locally.
Minimal example
Check: open http://127.0.0.1:5173, click "Submit", verify success toast
Viewport: 1280x720 and 390x844
Evidence: screenshots/playwright-submit-desktop.png
Result: pass
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.
- 1mo ago First seen · 57 lines · 45 tokens per session scan A ad08fd0f4115
browser-playwright-check is a skill published in the GitHub repository joinwell52-AI/CodeFlowMu-open (2 stars, last pushed 2mo ago), licensed MIT. It adds 45 tokens to every session and 462 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.
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