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 kennethkhoocy/legal-scholarship-skills --skill download-gated-pdfsgit clone --depth 1 https://github.com/kennethkhoocy/legal-scholarship-skillsWrote 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/kennethkhoocy/legal-scholarship-skills/download-gated-pdfs)<a href="https://agentmods.dev/skills/kennethkhoocy/legal-scholarship-skills/download-gated-pdfs"><img src="https://agentmods.dev/badge/skills/kennethkhoocy/legal-scholarship-skills/download-gated-pdfs/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/kennethkhoocy/legal-scholarship-skills/download-gated-pdfs"><img src="https://agentmods.dev/badge/skills/kennethkhoocy/legal-scholarship-skills/download-gated-pdfs.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 | $0.00137 | $0.00794 |
| Opus 5 | $0.00068 | $0.00397 |
| Sonnet 5 | $0.00027 | $0.00159 |
| Haiku 4.5 | $0.00014 | $0.00079 |
Grade A, and why
download-gated-pdfs scanned grade A with 1 finding 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 12d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
Use when: (1) curl/WebFetch of a .pdf URL returns HTML instead of a PDF even with a This is a copy
100% identical to download-gated-pdfs — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Download bot-gated PDFs via Wayback id_
Problem
Many think-tank and publisher sites (taxpolicycenter.org, urban.org, SSRN delivery) serve an HTML bot-challenge page instead of the PDF to non-browser clients. A browser User-Agent header does not help. The downloaded "PDF" is actually HTML.
Context / Trigger Conditions
curl -o file.pdf <url>succeeds but the file starts with<!DOC- pypdf raises
invalid pdf header: b'<!DOC'orPdfStreamError: Stream has ended unexpectedly - Firecrawl
scrapereturns clean markdown for the same URL (its proxies get through), but Firecrawl does not return the binary — only parsed content
Solution
- Request the file through the Wayback Machine's raw-content (
id_) endpoint, which serves the original archived binary without rewriting:curl -sL -A "Mozilla/5.0 ... Chrome/126.0 Safari/537.36" \ "https://web.archive.org/web/<YYYY>id_/<original-pdf-url>" -o out.pdf<YYYY>is any year likely to have a snapshot (e.g. publication year); Wayback redirects to the nearest capture. Theid_suffix after the timestamp is what requests the untouched original. - Verify the download with pypdf — a bot page fails immediately:
from pypdf import PdfReader r = PdfReader("out.pdf"); print(len(r.pages), "pages") - If Wayback has no capture, fall back to: another mirror found via search (Exa/Firecrawl), or Firecrawl scrape for the parsed text when the binary is not strictly needed.
Verification
PdfReader opens the file and reports a plausible page count; first-page text matches
the expected title.
Example
Verified 2026-07-15: taxpolicycenter.org/sites/default/files/publication/165884/ssrn-id4797771.pdf
and urban.org/sites/default/files/publication/80621/2000790-...pdf both bot-gated to
direct curl (with UA), both downloaded intact via
https://web.archive.org/web/2024id_/<url> and .../web/2023id_/<url> (18 and 12 pages).
Notes
- Government data hosts (e.g.
ticdata.treasury.gov) are usually NOT gated — try direct curl first; Wayback is the fallback, not the default. - Wayback captures can be stale for frequently-revised documents; check the snapshot date if currency matters.
- See also: the
pdfskill (parsing/extraction after download) andfirecrawl:firecrawl-scrape(parsed markdown when the binary is unnecessary).
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.
- 12d ago First seen · 64 lines · 137 tokens per session scan A 991e75d80f01
download-gated-pdfs is a skill published in the GitHub repository kennethkhoocy/legal-scholarship-skills (9 stars, last pushed 7d ago), licensed MIT. It adds 137 tokens to every session and 794 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 100% identical to download-gated-pdfs, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
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A Chinese-language research workflow that searches the internet and produces a formatted PDF report about a specified topic.
download-gated-pdfs
Download the actual PDF binary from bot-gated sites (taxpolicycenter.org, urban.org, SSRN-hosted mirrors, think-tank/publisher sites) via the Wayback Machine id URL form. Use when: (1) curl/WebFetch of a .pdf URL returns HTML instead of a PDF even with a browser User-Agent, (2) pypdf fails with "invalid pdf header…
pdf-analyze
Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Claude needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale.
pdf-processing
Extract text and tables from PDF files, fill forms, merge documents. Use when working with PDF files or when the user mentions PDFs, forms, or document extraction.