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 ondrej-svec/heart-of-gold-toolkit --skill audiogit clone --depth 1 https://github.com/ondrej-svec/heart-of-gold-toolkitWrote 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/ondrej-svec/heart-of-gold-toolkit/audio)<a href="https://agentmods.dev/skills/ondrej-svec/heart-of-gold-toolkit/audio"><img src="https://agentmods.dev/badge/skills/ondrej-svec/heart-of-gold-toolkit/audio/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/ondrej-svec/heart-of-gold-toolkit/audio"><img src="https://agentmods.dev/badge/skills/ondrej-svec/heart-of-gold-toolkit/audio.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 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 Rogue Agent · line 15 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 184 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Data Exfiltration · line 245 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 | $0.00108 | $0.05005 |
| Opus 5 | $0.00054 | $0.02502 |
| Sonnet 5 | $0.00022 | $0.01001 |
| Haiku 4.5 | $0.00011 | $0.00500 |
Grade A, and why
audio 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 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.
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 — 552 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Audio Production
Generate audio — from single-line TTS to multi-voice podcasts. Currently powered by ElevenLabs. Includes ready-to-run Python scripts. Claude writes them to a temp file and executes directly.
Boundaries
This skill MAY: install the SDK, generate audio files, list voices, create voice clones, write and execute generation scripts, play audio.
This skill MAY NOT: store API keys in code (use env vars or ~/.elevenlabs/api_key), commit audio files to git, generate audio without user approval of the script first.
Common Rationalizations
| Shortcut | Why It Fails | The Cost |
|---|---|---|
| Hardcode API key in script | Leaks credentials to git history | Security incident |
| Skip voice selection | Default voice may not match content tone | Wasted credits on re-gen |
| Generate full podcast without preview | Long audio = expensive; mistakes compound | Non-refundable credits |
| Import pydub for concatenation | Broken on Python 3.13+ (audioop removed) | Runtime crash |
| Use VoiceSettings with cloned voices | Custom settings destabilize cloned voices | Garbled/robotic audio |
Use ... for pauses |
Causes hesitation/nervousness artifacts | Unnatural stuttering |
| Use large chunks for long content | Quality degrades in second half | Robotic pacing |
Skip language_code with accented speakers |
Model guesses language from accent | Chinese/French mid-narration |
Phase 0: Environment Setup
Entry: User wants audio content.
Step 1: Detect Authentication
Check in order — use the first one found:
# 1. Check CLI auth (preferred — already logged in)
elevenlabs auth whoami --no-ui 2>/dev/null
# 2. Check env var
echo "${ELEVENLABS_API_KEY:+set}"
# 3. Check stored key file
cat ~/.elevenlabs/api_key 2>/dev/null | head -c 10
API key resolution in Python (use this in ALL scripts):
import os
def get_api_key() -> str:
"""Resolve ElevenLabs API key from CLI store, env var, or fail."""
key_file = os.path.expanduser("~/.elevenlabs/api_key")
if os.path.exists(key_file):
return open(key_file).read().strip()
key = os.environ.get("ELEVENLABS_API_KEY", "")
if key:
return key
raise RuntimeError(
"No ElevenLabs API key found. Run `elevenlabs auth login` or "
"set ELEVENLABS_API_KEY environment variable."
)
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 · 552 lines · 108 tokens per session scan A e8bb776efc34
audio is a skill published in the GitHub repository ondrej-svec/heart-of-gold-toolkit (19 stars, last pushed 22d ago), licensed MIT. It adds 108 tokens to every session and 5,005 once invoked, about $0.0005 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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