reins SKILL.md skillA
reins from karnstack/reins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add karnstack/reins/reins@git:20260928.50170efPins git:20260928.50170ef in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- karnstack/reins
- Path
skills/reins/SKILL.md- Versions recorded
- 7
- Latest version
- git:20260928.50170ef, committed Sep 28, 2026
- First version recorded
- Jul 11, 2026
- Size
- 17,579 bytes
- Repository stars
- 24
- License
- MIT
Drive the user's real, logged-in browser from the shell via the reins CLI. Because it's their actual browser, every site is already authenticated — so you can scrape behind logins, read cookies/tokens/localStorage, watch and replay live API traffic, call a site's own API as the signed-in user, and click/type/screenshot. Use whenever asked to interact with, test, scrape, extract data from, or automate a live webpage or authenticated site in the user's 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
# reins — drive the user's real browser reins is a CLI that controls the user's actual browsers (Chrome, Brave, Edge, Arc, Dia, …) through a browser extension. Real sessions, real logins — no separate automation profile, no login flows, no API keys. Everything runs locally on 127.0.0.1. ## Your superpower You are not in a sandboxed headless browser. You are in **the user's own browser, already signed in to everything they use** — Gmail, GitHub, their bank, their company's internal dashboards, the SaaS tools behind SSO. Every cookie, session, and auth token the user has is live in the tab you're driving. Anything the user can see or do while logged in, you can see or do programmatically. That changes what's possible: - **Scrape behind logins.** Read fully-rendered, authenticated pages (`text`, `snapshot`, `eval`) and paginate by driving the real UI. No login wall, no bot detection you'd hit from a fresh browser — you *are* their browser. - **Read tokens and storage.** `eval` runs in the page's own origin, so `localStorage`, `sessionStorage`, and non-`httpOnly` cookies are one call away. `httpOnly` cookies that JavaScript can't touch are still reachable via …
Read the whole file at its exact version.
How to install
mdr add karnstack/reins/reins@sha256:5792bbb687bf2b4fThe line at the top of this page pins the label git:20260928.50170ef, 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_yus44ppqkuelzwp6)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Jul 11, 2026 and Sep 28, 2026, about one every 13 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260928.50170ef latest | 2026-09-28 | 50170ef | 17,579 B | A | view · diff |
| git:20260928.f2b0801 | 2026-09-28 | f2b0801 | 17,319 B | A | view · diff |
| git:20260926.1033778 | 2026-09-26 | 1033778 | 12,414 B | A | view · diff |
| git:20260926.9c7fb71 | 2026-09-26 | 9c7fb71 | 11,642 B | A | view · diff |
| git:20260926.f7669b6 | 2026-09-26 | f7669b6 | 11,511 B | A | view · diff |
| git:20260926.3ddece9 | 2026-09-26 | 3ddece9 | 11,254 B | A | view · diff |
| git:20260711.e07ff48 | 2026-07-11 | e07ff48 | 10,343 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (17579 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
karnstack/reins · 24 stars · license MIT · pushed 2026-10-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yus44ppqkuelzwp6 GET https://markdownregistry.com/api/v1/resolve?ref=karnstack/reins/reins GET https://markdownregistry.com/api/v1/blob/5792bbb687bf2b4f1d2de1022676060203ae4d1abf881ab13a94dd30cdbfe820
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.