using-webctl SKILL.md skillA
using-webctl from oaustegard/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add oaustegard/claude-skills/using-webctl@v0.0.2Pins v0.0.2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- oaustegard/claude-skills
- Path
plugins/web-and-retrieval/skills/using-webctl/SKILL.md- Versions recorded
- 1
- Latest version
- v0.0.2, committed Jul 7, 2026
- Size
- 5,586 bytes
- Repository stars
- 158
- License
- MIT
Browser automation via webctl CLI in Claude.ai containers with authenticated proxy support. Use when users mention webctl, browser automation, Playwright browsing, web scraping, or headless Chrome in container environments.
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
# Using webctl in Claude.ai Containers Browser automation using webctl CLI with automatic proxy authentication handling for Claude.ai's egress-controlled environment. ## When This Skill Applies - User requests browser automation, web scraping, or page interaction - webctl commands fail with `ERR_TUNNEL_CONNECTION_FAILED` - Playwright/Chromium needs to work through authenticated HTTP proxy ## Core Problem Claude.ai containers route traffic through an authenticated egress proxy (`HTTP_PROXY` env var with JWT credentials). Chromium doesn't properly handle proxy authentication for HTTPS CONNECT tunnels, causing all HTTPS navigation to fail even though curl works. ## Solution A local forwarding proxy (port 18080) intercepts Chromium connections and injects `Proxy-Authorization` headers before forwarding to the real egress proxy. ## Setup Procedure ### 1. Install webctl ```bash pip install webctl --break-system-packages webctl setup # Downloads Chromium if needed ``` ### 2. Deploy Auth Proxy Module Copy `scripts/auth_proxy.py` to webctl's daemon directory: ```bash cp /mnt/skills/user/using-webctl/scripts/auth_proxy.py \ …
Read the whole file at its exact version.
How to install
mdr add oaustegard/claude-skills/using-webctl@sha256:938af05aa19996b3The line at the top of this page pins the label v0.0.2, 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_n56sp4qkc4wxbwuc)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 7, 2026.
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 (5586 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
oaustegard/claude-skills · 158 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_n56sp4qkc4wxbwuc GET https://markdownregistry.com/api/v1/resolve?ref=oaustegard/claude-skills/using-webctl GET https://markdownregistry.com/api/v1/blob/938af05aa19996b32ad459f9b1b84db01db12b6d9cf3105cab2847a70f2f3113
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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