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 xberg-io/crawlberg --skill crawlberg-crawling-a-sitegit clone --depth 1 https://github.com/xberg-io/crawlbergWrote 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/xberg-io/crawlberg/crawlberg-crawling-a-site)<a href="https://agentmods.dev/skills/xberg-io/crawlberg/crawlberg-crawling-a-site"><img src="https://agentmods.dev/badge/skills/xberg-io/crawlberg/crawlberg-crawling-a-site/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/xberg-io/crawlberg/crawlberg-crawling-a-site"><img src="https://agentmods.dev/badge/skills/xberg-io/crawlberg/crawlberg-crawling-a-site.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 | $0.00046 | $0.01382 |
| Opus 5.5 | $0.00018 | $0.00553 |
| Sonnet 5.5 | $0.00009 | $0.00276 |
| Haiku 4.5 | $0.00005 | $0.00138 |
Grade A, and why
crawlberg-crawling-a-site 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 yesterday.
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 — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crawling a site
Reach for crawlberg crawl when one URL is not enough — the user wants
the docs site, the blog, the marketing pages, or the whole domain.
Quick recipe
crawlberg crawl https://example.com \
--depth 3 \
--max-pages 200 \
--concurrent 8 \
--rate-limit 250 \
--stay-on-domain \
--respect-robots-txt \
--format markdown
Defaults you should usually override:
--depth 2is shallow — set it explicitly.--max-pagesis unbounded by default; cap it for any unknown site.--concurrent 10is aggressive for small hosts; drop to 4-8 for third-party sites.
Flag surface
| Flag | Default | Purpose |
|---|---|---|
--depth, -d |
2 |
Maximum hop count from the seed URL. |
--max-pages, -n |
— | Hard cap on pages fetched. Set this on any unknown site. |
--concurrent, -c |
10 |
Parallel in-flight requests. |
--rate-limit |
200 |
Milliseconds between requests to the same origin. |
--stay-on-domain |
off | Skip links that leave the seed domain. |
--respect-robots-txt |
off | Honour robots.txt. Pass it for any third-party host. |
--proxy |
— | HTTP, HTTPS, or SOCKS5 proxy URL. |
--user-agent |
— | Override the request UA. Be honest. |
--timeout |
30000 |
Per-request timeout in ms. |
--browser-mode |
auto |
auto, always, never — see the headless-fallback skill. |
--browser-endpoint |
— | External CDP ws:// URL. |
--format |
json |
json or markdown. |
--config |
— | Inline JSON or @file.json for the full CrawlConfig. |
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- yesterday First seen · 149 lines · 46 tokens per session scan A 64c8fd04e45b
crawlberg-crawling-a-site is a skill published in the GitHub repository xberg-io/crawlberg (185 stars, last pushed today), licensed MIT. It adds 46 tokens to every session and 1,382 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 2026-10-15.
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