SkillsBench is a benchmark for measuring how effectively AI agents use modular skills—folders containing instructions, scripts, and resources—to complete specialized tasks. It helps researchers and developers evaluate both skill quality and agent behavior, including tasks that require combining multiple skills. The catalogue’s skills and instructions are evaluated as part of this workflow.
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 benchflow-ai/skillsbench --skill audiobookgit clone --depth 1 https://github.com/benchflow-ai/skillsbenchWrote 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/benchflow-ai/skillsbench/audiobook)<a href="https://agentmods.dev/skills/benchflow-ai/skillsbench/audiobook"><img src="https://agentmods.dev/badge/skills/benchflow-ai/skillsbench/audiobook.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Data Exfiltration · line 161 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 162 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 198 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 198 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 199 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00042 | $0.02299 |
| Opus 5 | $0.00021 | $0.01149 |
| Sonnet 5 | $0.00008 | $0.00460 |
| Haiku 4.5 | $0.00004 | $0.00230 |
Grade B, and why
audiobook scanned grade B with 3 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 8d 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.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
response = requests.post( "https://api.openai.com/v1/audio/speech", Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
"""Fetch article content using curl for reliability.""" Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
result = subprocess.run( Copies of this mod
1 near-identical copy found in the catalogue:
- audiobook — 100% identical, 3 lines differ
How it starts
The opening of the file, as written. The whole thing — 343 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Audiobook Creation Guide
Create audiobooks from web articles, essays, or text files. This skill covers the full pipeline: content fetching, text processing, and audio generation.
Quick Start
import os
# 1. Check which TTS API is available
def get_tts_provider():
if os.environ.get("ELEVENLABS_API_KEY"):
return "elevenlabs"
elif os.environ.get("OPENAI_API_KEY"):
return "openai"
else:
return "gtts" # Free, no API key needed
provider = get_tts_provider()
print(f"Using TTS provider: {provider}")
Step 1: Fetching Web Content
IMPORTANT: Verify fetched content is complete
WebFetch and similar tools may return summaries instead of full text. Always verify:
import subprocess
def fetch_article_content(url):
"""Fetch article content using curl for reliability."""
# Use curl to get raw HTML - more reliable than web fetch tools
result = subprocess.run(
["curl", "-s", url],
capture_output=True,
text=True
)
html = result.stdout
# Strip HTML tags (basic approach)
import re
text = re.sub(r'<script[^>]*>.*?</script>', '', html, flags=re.DOTALL)
text = re.sub(r'<style[^>]*>.*?</style>', '', html, flags=re.DOTALL)
text = re.sub(r'<[^>]+>', ' ', text)
text = re.sub(r'\s+', ' ', text).strip()
return text
Content verification checklist
Before converting to audio, verify:
- Text length is reasonable for the source (articles typically 1,000-10,000+ words)
- Content includes actual article text, not just navigation/headers
- No "summary" or "key points" headers that indicate truncation
def verify_content(text, expected_min_chars=1000):
"""Basic verification that content is complete."""
if len(text) < expected_min_chars:
print(f"WARNING: Content may be truncated ({len(text)} chars)")
return False
if "summary" in text.lower()[:500] or "key points" in text.lower()[:500]:
print("WARNING: Content appears to be a summary, not full text")
return False
return True
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.
- 8d ago First seen · 343 lines · 42 tokens per session scan B d9b52bdd1ec1
audiobook is a skill published in the GitHub repository benchflow-ai/skillsbench (1,748 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 42 tokens to every session and 2,299 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 3 findings (sends data to an external url, makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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