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 agentmods add skills/only-cli/oc/web-browsing-clinpx skills add only-cli/oc --skill web-browsing-cligit clone --depth 1 https://github.com/only-cli/ocWhat 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 | $0.00043 | $0.01892 |
| Opus 5 | $0.00022 | $0.00946 |
| Sonnet 5 | $0.00009 | $0.00378 |
| Haiku 4.5 | $0.00004 | $0.00189 |
Grade A, and why
web-browsing-cli 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
only-cli
Renders a web page as a compact, numbered terminal view instead of raw HTML. A typical page is under 500 tokens.
npx --yes @only-cli/[email protected] open <url> compact view, numbered elements
npx --yes @only-cli/[email protected] do <n> follow link [n], or read it if [n] is text
npx --yes @only-cli/[email protected] find <query> where a string appears, or that place itself
when only one matches
npx --yes @only-cli/[email protected] next next ~500 tokens of the page already open
npx --yes @only-cli/[email protected] read <n> full text of region [n]
npx --yes @only-cli/[email protected] raw [url] whole page as markdown (--html for cleaned HTML)
npx --yes @only-cli/[email protected] login seed cookies (--cookie, --domain, --expires)
npx --yes @only-cli/[email protected] logout [session] forget a session: cookies and saved page
None of these except open/do/raw <url> fetch anything; they replay the page open already saved.
Site shortcuts
oc <site> <verb> [args] resolves to a URL and then behaves exactly like open on it, so it costs the same and reads the same. It saves guessing a URL shape and, on a few sites, points at the feed or public API that answers without a login. search on py, node, and ruby ranks the docs' own index locally, and on mdn asks the site's API; each prints a normal numbered result page.
oc hn top oc reddit sub ClaudeAI oc gh repo only-cli oc
oc wiki article Eiffel Tower oc wiki search anthropic oc wiki lang de Berlin
oc ddg search claude code oc so question 231767 oc learn doc azure/aks/what-is-aks
oc py library json oc mdn js Array/map oc node api fs
Sites: hn, reddit, gh, x, linkedin, ddg, bing, so, yahoo, yt, aws, gcp, learn, wiki, py, mdn, node, ruby, go, rust, java, php, cpp, ts. Name one by short name, bare name, or domain (oc hn, oc ycombinator, oc news.ycombinator.com). The last argument takes every word after it, so a query or title needs no quoting. oc sites lists every site with its verbs, which is cheaper than guessing one.
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.
- 2d ago First seen · 100 lines · 43 tokens per session scan A 9a05f1dd4706
web-browsing-cli is a skill published in the GitHub repository only-cli/oc (411 stars, last pushed 6d ago), licensed MIT. It adds 43 tokens to every session and 1,892 once invoked, about $0.0002 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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