browser-harness SKILL.md skillA
browser-harness from davidondrej/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add davidondrej/skills/browser-harness@git:20261012.bbafe9dPins git:20261012.bbafe9d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- davidondrej/skills
- Path
skills/research-and-web/browser-harness/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261012.bbafe9d, committed Oct 12, 2026
- First version recorded
- Sep 5, 2026
- Size
- 11,866 bytes
- Repository stars
- 4,161
- License
- MIT
Direct browser control via CDP. Use when the user wants to automate, scrape, test, or interact with web pages. Connects to the user's already-running Chrome.
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-harness
Direct browser control via CDP. For task-specific edits, use `agent-workspace/agent_helpers.py`. For setup, install, or connection problems, read install.md.
**Routing check first:** if the task needs no interaction (no clicks, logins, or forms) and you just want page content, use DeepAPI `POST /v1/scrape/website` instead of driving a browser — see the `deepapi` skill. Use browser-harness when the task needs a real browser: interaction, JS-heavy flows, logged-in sessions, or visual verification.
Domain skills (community-contributed per-site playbooks under `agent-workspace/domain-skills/`) are off by default. Set `BH_DOMAIN_SKILLS=1` to enable them; see the bottom section.
**If `BH_DOMAIN_SKILLS=1` and the task is site-specific, read every file in the matching `agent-workspace/domain-skills/<site>/` directory before inventing an approach.**
## Usage
```bash
browser-harness -c '
new_tab("https://docs.browser-use.com")
wait_for_load()
print(page_info())
'
```
- Invoke as browser-harness — it's on $PATH. No cd, no uv run.
- First navigation is new_tab(url), not goto_url(url) — goto runs in the user's active tab and clobbers their work.
## Tool call shape
…Read the whole file at its exact version.
How to install
mdr add davidondrej/skills/browser-harness@sha256:3a57a3cd348aaf86The line at the top of this page pins the label git:20261012.bbafe9d, 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_rf7m5bsda3l2smvo)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Sep 5, 2026 and Oct 12, 2026, about one every 19 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261012.bbafe9d latest | 2026-10-12 | bbafe9d | 11,866 B | A | view · diff |
| git:20260925.cb72780 | 2026-09-25 | cb72780 | 11,871 B | A | view · diff |
| git:20260905.9dc1cd3 | 2026-09-05 | 9dc1cd3 | 11,867 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 (11866 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
davidondrej/skills · 4,161 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rf7m5bsda3l2smvo GET https://markdownregistry.com/api/v1/resolve?ref=davidondrej/skills/browser-harness GET https://markdownregistry.com/api/v1/blob/3a57a3cd348aaf86c38b4400e0af867d5cb3632392755912d9d56a7bb4048150
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.
More from davidondrej/skills
Every file in davidondrej/skills