Borrowing it
Nothing to install: this file belongs to beel-collab/presets.dev. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/beel-collab/presets.dev/main/release/playwright/native/copilot/.github/instructions/playwright.instructions.mdgit clone --depth 1 https://github.com/beel-collab/presets.devWrote 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/instructions/beel-collab/presets.dev/playwright)<a href="https://agentmods.dev/instructions/beel-collab/presets.dev/playwright"><img src="https://agentmods.dev/badge/instructions/beel-collab/presets.dev/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.
<a href="https://agentmods.dev/instructions/beel-collab/presets.dev/playwright"><img src="https://agentmods.dev/badge/instructions/beel-collab/presets.dev/playwright.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 | $0.00821 | $0.00821 |
| Opus 5.5 | $0.00328 | $0.00328 |
| Sonnet 5.5 | $0.00164 | $0.00164 |
| Haiku 4.5 | $0.00082 | $0.00082 |
Grade A, and why
presets.dev playwright.instructions.md 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Playwright Copilot Instructions: Locators, Fixtures and Assertions
Path-specific Copilot instructions for Playwright. They apply through applyTo and leave .github/copilot-instructions.md in place.
Updated for Playwright 1.65.0, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
Project shape
Tests live in the directory the config already scans. Name the file the way neighbors are named. Share auth or a seeded account through a fixture, not through a login copied into every test. A storage state file is generated. Do not commit a storage state that contains a real session.
One test owns one behavior. A serial chain is a last resort and must say why.
Locators and assertions
Locate by role and accessible name first, then by test id when the role is not unique. Do not use a CSS path that walks three divs. Do not use an xpath you cannot read out loud.
Assert with a web-first assertion: toBeVisible, toHaveText, toHaveURL. Those wait. expect(await locator.textContent()).toBe(...) does not retry the locator. A fixed waitForTimeout is a bug, not a fix for a race.
Isolation
Each test can run alone, in any order. Create the data it needs. Do not depend on a previous test's row. Do not share a mutable account across workers. The exclusive lock exists for the rare case that must be alone. Do not put it on every test.
A dialog, a download, and a popup are events you wait for before the click that opens them, using the project's pattern.
Failures
On failure, the trace and the screenshot are the evidence. Turn them on in the config the project already has, usually retain-on-failure. Read the trace before you add a sleep. The failures reporter is useful when the installed version has it. Do not add a second reporter that hides the trace.
Security and performance
Tests use a test account and a local or disposable base URL. Do not point the suite at production, and do not embed a password in the spec. Read credentials from the env the config already documents.
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.
- today First seen · 73 lines · 821 tokens per session scan A db2bdc4b9d24
presets.dev playwright.instructions.md is an instructions file published in the GitHub repository beel-collab/presets.dev (3 stars, last pushed yesterday), licensed MIT. It adds 821 tokens to every session, about $0.0033 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 2026-11-13.
presets.dev playwright.instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| presets.dev playwright.instructions.mdbeel-collab/presets.dev | Instructions file | 3 | yesterday | MIT | A | 821 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,685 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,086 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 280k | 2d ago | MIT | A | 4,325 | Codex, OpenCode |