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 causify-ai/helpers --skill book.gather_infogit clone --depth 1 https://github.com/causify-ai/helpersWrote 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/causify-ai/helpers/book.gather_info)<a href="https://agentmods.dev/skills/causify-ai/helpers/book.gather_info"><img src="https://agentmods.dev/badge/skills/causify-ai/helpers/book.gather_info.svg" alt="Measured on agentmods" 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 | $0.00004 | $0.00260 |
| Opus 5 | $0.00002 | $0.00130 |
| Sonnet 5 | $0.00001 | $0.00052 |
| Haiku 4.5 | $0.00000 | $0.00026 |
Grade A, and why
book.gather_info 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 7d 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
-
Given information about books (either a partially complete table or a list of books), find the following information:
- Title
- Authors
- Use the format from
.claude/skills/references.rules.mdand## Format of Authors
- Use the format from
- Publisher
- Year
- Technical: Yes if it's a technical book, otherwise no
- Goodreads (1-10): Goodreads rating x 2
- Reviews (1-10): Relative volume (10 = 1500+ reviews, 1 = <10 reviews)
- Academic (1-10): Theoretical depth and scientific rigor
- Practical (1-10): Industry applicability and hands-on utility
- Clarity (1-10): Accessibility and pedagogical quality
- Average: Simple mean of the previous values
-
Do not print any information on the screen, but only save a file
-
Output files:
book_info.md: Markdown tablebook_info.tsv: Tab-separated values- Make sure that there is no file already, otherwise use a file like
book_info.<comment>.{md,tsv}
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.
- 7d ago First seen · 28 lines · 4 tokens per session scan A 7a77fb59011a
book.gather_info is a skill published in the GitHub repository causify-ai/helpers (145 stars, last pushed today), licensed Apache-2.0. It adds 4 tokens to every session and 260 once invoked, about $0.0000 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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