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.
npx skills add nek1987/auto-agent-harness --skill agent-browsergit clone --depth 1 https://github.com/nek1987/auto-agent-harnessWrote 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.
[](https://agentmods.dev/skills/nek1987/auto-agent-harness/agent-browser)<a href="https://agentmods.dev/skills/nek1987/auto-agent-harness/agent-browser"><img src="https://agentmods.dev/badge/skills/nek1987/auto-agent-harness/agent-browser/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.
<a href="https://agentmods.dev/skills/nek1987/auto-agent-harness/agent-browser"><img src="https://agentmods.dev/badge/skills/nek1987/auto-agent-harness/agent-browser.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00051 | $0.01937 |
| Opus 5.5 | $0.00020 | $0.00775 |
| Sonnet 5.5 | $0.00010 | $0.00387 |
| Haiku 4.5 | $0.00005 | $0.00194 |
Grade A, and why
agent-browser 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 1mo 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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 1mo ago First seen · 252 lines · 51 tokens per session scan A 90345f84e551
agent-browser is a skill published in the GitHub repository nek1987/auto-agent-harness (4 stars, last pushed 6mo ago), with no licence file. It adds 51 tokens to every session and 1,937 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.
Other skills, from other repositories
e2e-browser-test
Use when a ticket asks for end-to-end or browser coverage of a user journey — sign-up, checkout, a form submission, a dashboard flow — driven through the real UI with Playwright, Cypress, or the repo's browser harness. Invoke for "add an e2e test", "cover the flow in the browser", or when an acceptance criterion can…
playwright-automation
Browser automation and testing with Playwright. Use when testing web applications, automating browser tasks, taking screenshots, or validating UI behavior.
browser-testing-with-devtools
Use when building or debugging anything that runs in a browser. Use when you need to inspect the DOM, capture console errors, analyze network requests, profile performance, or verify visual output with real runtime data via Chrome DevTools MCP.
e2e
Agentic end-to-end tests with e2e, the e2e runner. Covers scaffolding e2e.config.ts, picking the Playwright browser engine or the agent-device mobile engine, starting the app under test from the config, driving flows with agent.act, judging with agent.assert, agent.waitFor, and agent.extract, pinning values with…
dev-browser
CIEL's framework for browser automation with persistent page state. Navigates URLs, fills forms, takes screenshots, scrapes data, and tests web apps via sandboxed JavaScript scripts.
webapp-testing
Verify a local web app in a real browser with page, element, click, form, console and screenshot evidence. Use after a build or UI change; do not implement features or publish deployments with this skill.