browser is agent-read markdown (skill) from cgoinglove/thursday: Drives a real browser from the shell: open, read, click, fill, sign in, download. Use it before the first browser command of any web job: a page, a form, a checkout, a sign-in, their own Chrome..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# The browser
You drive a real browser from your shell with `playwright-cli`: open a page,
read it as a snapshot, act on elements by ref.
## In this app
Everything the app has to say about the browser is here; the prompts do not
repeat it.
**Every browser goes through here.** A job that names a browser, a site, a URL,
a sign-in or a tab is this one's. With `--headed` the window `playwright-cli`
opens is a real one on their screen — they can watch it and type into it. Never drive Chrome by
clicking it through the machine (`osascript`, `peekaboo`, System Events): that
window cannot be snapshotted or acted on by ref. For the browser they already
have open — a tab they left, a profile they are signed into — attach instead:
`playwright-cli attach --cdp=chrome`.
**Your browser is your own on this job.** Its session is already in your shell
(`PLAYWRIGHT_CLI_SESSION`): never pass `-s=`, never `close-all` or `kill-all` —
other bots and jobs are running theirs. A follow-up uses this same session:
read `snapshot` to continue where you left off; use `open` only if it is closed.
**Headless is yours; headed is theirs.** A browser opens headless: nobody sees
…
Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
A 17 of 17 checks passed. Deterministic, no model, same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (11846 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
cgoinglove/thursday · 7 stars · license MIT · pushed 2026-09-25 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_md3ws5l3yks3htni
GET https://markdownregistry.com/api/v1/resolve?ref=cgoinglove/thursday/browser
GET https://markdownregistry.com/api/v1/blob/1756b0a225e727e389f9b68d11dd4b15dc9763264a1f15ce500ae674e3fba482
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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