browser-use SKILL.md skillB
browser-use from letta-ai/letta-code is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add letta-ai/letta-code/browser-use@git:20260903.d9a1dc2Pins git:20260903.d9a1dc2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- letta-ai/letta-code
- Path
src/skills/builtin/browser-use/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260903.d9a1dc2, committed Sep 3, 2026
- First version recorded
- Aug 31, 2026
- Size
- 13,200 bytes
- Repository stars
- 3,759
- License
- Apache-2.0
Control a real browser to navigate pages, click, type, fill forms, inspect rendered UI, take screenshots, or record video. Load only when the user asks to open or automate a browser, interact with or test rendered page UI, scrape a site that needs browser execution, or capture a browser screenshot or video. Do not load for backend logs, traces, API or stream events, source-code inspection, or plain HTTP or web research that does not require a browser.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Browser Use with CDP Drive the browser through its native Chrome DevTools Protocol over the remote-debugging WebSocket. This works with zero dependencies: launch the browser with `--remote-debugging-port`, then talk JSON over `fetch` and the built-in `WebSocket` global (available in Bun and Node ≥ 22 — no `ws` package). If the project already has Playwright or Puppeteer installed, using it is usually simpler — reach for raw CDP when no automation library is available, when protocol-level control is needed, or when recording a deterministic visual demo. Protocol reference: https://chromedevtools.github.io/devtools-protocol/. The running browser's exact schema is at `http://127.0.0.1:<port>/json/protocol`; tip-of-tree docs can differ from the installed version. ## Visible by default when a display exists When the computer has a display, prefer a visible (headful) browser for any task the user might watch or take over: clicking or typing, forms, sign-in, checkout/payment, CAPTCHAs or bot protection, and user handoff. Most browser tasks exist because plain HTTP is not enough; a headless browser is more …
Read the whole file at its exact version.
How to install
mdr add letta-ai/letta-code/browser-use@sha256:3c98f7be0b956721The line at the top of this page pins the label git:20260903.d9a1dc2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_nyf33d5iztojxhqo)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Aug 31, 2026 and Sep 3, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260903.d9a1dc2 latest | 2026-09-03 | d9a1dc2 | 13,200 B | B | view · diff |
| git:20260831.c346e35 | 2026-08-31 | c346e35 | 15,499 B | B | view |
Audit of the latest version
- fail: No link to a raw IP address (matched: http://127.0.0.1)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13200 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 script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
letta-ai/letta-code · 3,759 stars · license Apache-2.0 · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nyf33d5iztojxhqo GET https://markdownregistry.com/api/v1/resolve?ref=letta-ai/letta-code/browser-use GET https://markdownregistry.com/api/v1/blob/3c98f7be0b9567219e7d03d5fb03536171b239dd8b856a28ed546c4db7c1e6e6
Your AI assistant 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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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