coalesce-labs/catalyst · plugins/dev/skills/agent-browser/SKILL.md

agent-browser skillA

agent-browser is agent-read markdown (skill) from coalesce-labs/catalyst: Fast browser automation CLI for AI agents. **ALWAYS use instead of Playwright MCP tools** for web testing, screenshots, form filling, and UI verification. Use when user says "open in browser", "check the site", "take a screenshot", "fill the form", "test the UI", or any browser interaction. Also use as a fallback when a task requires visual browser interaction that CLIs and APIs cannot handle (e.g., OAuth flows, complex dashboards, visual verification)..

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.

How to install

Latest version
mdr add coalesce-labs/catalyst/agent-browser@git:20260826.c0ed7cf
Exact content
mdr add coalesce-labs/catalyst/agent-browser@sha256:85d678e2ceed6d6b

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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_s6tyqeg5h6hvx34x.svg)](https://markdownregistry.com/a/art_s6tyqeg5h6hvx34x)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260826.c0ed7cf latest2026-08-26 c0ed7cf 3,573 BA view · diff
git:20260723.74fa0a82026-07-23 74fa0a8 15,053 BA view · diff
git:20260305.c0881bb2026-03-05 c0881bb 12,869 BA view · diff
git:20260304.651241b2026-03-04 651241b 7,321 BA view

Audit of the latest version

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 (3573 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

coalesce-labs/catalyst · 20 stars · license none · pushed 2026-09-16 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_s6tyqeg5h6hvx34x
GET https://markdownregistry.com/api/v1/resolve?ref=coalesce-labs/catalyst/agent-browser
GET https://markdownregistry.com/api/v1/blob/85d678e2ceed6d6b203caabae5cec3294e650f48e6fe5e229ff858b96a015015

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.