browser-harness-ats-automation

browser-harness-ats-automation is a skill for Claude Code, Codex from arimanyus/hermes-merchant. It costs 56 tokens per session (3,014 once invoked), scanned A, original, MIT.

A browser-automation guide for job application systems such as Ashby, Greenhouse, and Workday. It explains how to work with forms displayed inside embedded frames and how to handle uploads, hidden checkboxes, and known blockers.

In plain words
What is it for?
Use it to connect to the correct embedded form, fill fields, upload files, set hidden checkboxes, and diagnose blocked applications on recruiting sites.
Why use it?
It addresses failures caused by trying to control an application form from the wrong browser context. It also identifies cases such as reCAPTCHA or storage restrictions that can stop submission.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to connect to the correct embedded form, fill fields, upload files, set hidden checkboxes, and diagnose blocked applications on recruiting sites.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/arimanyus/hermes-merchant/browser-harness-ats-automation
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add arimanyus/hermes-merchant --skill browser-harness-ats-automation
Clone the repo
git clone --depth 1 https://github.com/arimanyus/hermes-merchant

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for browser-harness-ats-automation

README.md
[![agentmods](https://agentmods.dev/badge/skills/arimanyus/hermes-merchant/browser-harness-ats-automation/github.svg)](https://agentmods.dev/skills/arimanyus/hermes-merchant/browser-harness-ats-automation)
Your own site
<a href="https://agentmods.dev/skills/arimanyus/hermes-merchant/browser-harness-ats-automation"><img src="https://agentmods.dev/badge/skills/arimanyus/hermes-merchant/browser-harness-ats-automation/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for browser-harness-ats-automation

Your own site · 80×15
<a href="https://agentmods.dev/skills/arimanyus/hermes-merchant/browser-harness-ats-automation"><img src="https://agentmods.dev/badge/skills/arimanyus/hermes-merchant/browser-harness-ats-automation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,014 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00056 $0.03014
Opus 5 $0.00028 $0.01507
Sonnet 5 $0.00011 $0.00603
Haiku 4.5 $0.00006 $0.00301

Measured 13d ago against content hash 07f751e0e280, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

browser-harness-ats-automation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

browser-harness-ats-automation/SKILL.md · 282 lines

How it starts

The opening of the file, as written. The whole thing — 282 lines — stays where its author put it; the contents beside it link to each section on GitHub.

browser-harness-ats-automation

Automate job applications on ATS platforms (Ashby, Greenhouse, Workday) using browser-use/browser-harness with CDP.

Critical architecture: ATS forms live in iframes

Modern ATS platforms (Ashby, Greenhouse) render application forms inside cross-origin iframes. This is the root cause of most automation failures. You MUST attach to the iframe session before any DOM operations.

Standard setup

# Start Xvfb + Chrome with remote debugging
Xvfb :99 -screen 0 1280x800x24 &
export DISPLAY=:99
/usr/bin/chromium-browser --headless --no-sandbox --disable-gpu \
  --remote-debugging-port=9222 \
  --remote-debugging-address=127.0.0.1 &
sleep 3

# Install browser-harness
git clone https://github.com/browser-use/browser-harness.git
cd browser-harness && uv sync && uv tool install -e .

# Start daemon
cd browser-harness && nohup uv run bu-daemon &
sleep 2

CDP socket pattern

The socket is at /tmp/bu-default.sock. Use this helper inside uv run browser-harness <<'PY':

import socket, json

def cdp(method, session_id=None, **params):
    sk = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
    sk.connect("/tmp/bu-default.sock")
    r = {"method": method, "params": {"session_id": session_id, **params} if session_id else params}
    sk.sendall((json.dumps(r) + "\n").encode())
    data = b""
    while not data.endswith(b"\n"):
        chunk = sk.recv(1 << 20)
        if not chunk: break
        data += chunk
    sk.close()
    return json.loads(data).get("result", {})

FRAME_ID = "DFF978A387F9E4D8D8A8AF1EF7385A08"
sid = cdp("Target.attachToTarget", targetId=FRAME_ID, flatten=True).get("sessionId")

Finding the right iframe target

targets = cdp("Target.getTargets")
for t in targets.get("result", {}).get("targetInfos", []):
    if t["type"] in ("page", "iframe"):
        print(f"  {t['type']}: {t.get('url','')[:80]} id={t['targetId']}")

File upload in iframes

Read the full file on GitHub · 282 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 13d ago First seen · 282 lines · 56 tokens per session scan A 07f751e0e280

Subscribe to this mod's changes

browser-harness-ats-automation is a skill published in the GitHub repository arimanyus/hermes-merchant (36 stars, last pushed 4mo ago), licensed MIT. It adds 56 tokens to every session and 3,014 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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