Agentlas OS is a local-first system for creating, storing, borrowing, and running specialist AI agents and temporary agent teams through supported hosts and models. It serves people who want reusable agents that remain available across computers and model workspaces, and the catalogue contains its skills, commands, hooks, agents, instructions, plugin, and rule.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/agentlas-ai/Agentlas-OSnpx agentmods add skills/agentlas-ai/agentlas-os/hep-browserWrote 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/agentlas-ai/agentlas-os/hep-browser)<a href="https://agentmods.dev/skills/agentlas-ai/agentlas-os/hep-browser"><img src="https://agentmods.dev/badge/skills/agentlas-ai/agentlas-os/hep-browser.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00015 | $0.00545 |
| Opus 5 | $0.00008 | $0.00272 |
| Sonnet 5 | $0.00003 | $0.00109 |
| Haiku 4.5 | $0.00002 | $0.00055 |
Grade A, and why
hep-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 5d 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.
What it actually says
Update fallback: 자동 업데이트가 안 되면 hephaestus update를 한 번 실행하세요. 업데이트하지 않아도 현재 버전 명령은 그대로 동작합니다.
Hephaestus Browser
Raw arguments: everything the user typed after /skill:hep-browser.
Codex plugins cannot register slash commands, so this custom prompt is the
explicit entrypoint: /prompts:hep-browser.
Use this when the task needs a real browser, page rendering, login-visible state, click/form behavior, or JS-heavy evidence. Prefer the Agentlas browser hardpoint first.
Behavior:
/prompts:hep-browser <url>reads a rendered browser snapshot./prompts:hep-browser <url> "<instruction>"or/prompts:hep-browser <url> --act "<instruction>"performs browser automation throughbrowser.agent_cli, then captures a snapshot.- If the Agentlas Browser CDP port is already live, the command attaches to it by default so logged-in Desktop/browser state is reused.
- Prefer the human-facing URL a person would type over app-shell automation
URLs. For example, use
https://mail.google.com/instead ofhttps://mail.google.com/mail/u/0/#inboxunless that exact deep route is required. Add--raw-urlto preserve the exact URL. - Use
--click @e1or--click-text "Compose"for LLM-free browser primitives after the host has selected a ref/text target. - Add
--wait-ms 2000when a dynamic app opens dialogs after a short delay. - Add
--readto force snapshot-only mode when extra text is context rather than an action.
RUNNER=""
for c in "$HOME/.agentlas/runtime/current/bin/hephaestus" ./bin/hephaestus; do
[ -x "$c" ] && RUNNER="$c" && break
done
[ -n "$RUNNER" ] || { echo "Hephaestus runtime not found. Run the installer first." >&2; exit 1; }
"$RUNNER" hep-browser "$ARGUMENTS"
Report whether browser.agent_cli mounted, whether setup is needed, and the
receipt id. For automation, also report the action, whether CDP/profile flags
were used, and the final snapshot status. If setup is needed, show
hep-browser --setup and hep-browser --check.
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.
- 5d ago First seen · 48 lines · 15 tokens per session scan A 1bae2393c427
hep-browser is a skill published in the GitHub repository agentlas-ai/Agentlas-OS (1,103 stars, last pushed 2d ago), licensed Apache-2.0. It adds 15 tokens to every session and 545 once invoked, about $0.0001 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 2026-09-03.
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