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 agentmods add skills/jackfranklin/dotfiles/convert-audio-mononpx skills add jackfranklin/dotfiles --skill convert-audio-monogit clone --depth 1 https://github.com/jackfranklin/dotfilesWrote 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/jackfranklin/dotfiles/convert-audio-mono)<a href="https://agentmods.dev/skills/jackfranklin/dotfiles/convert-audio-mono"><img src="https://agentmods.dev/badge/skills/jackfranklin/dotfiles/convert-audio-mono.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 | $0.00034 | $0.00482 |
| Opus 5 | $0.00017 | $0.00241 |
| Sonnet 5 | $0.00007 | $0.00096 |
| Haiku 4.5 | $0.00003 | $0.00048 |
Grade A, and why
convert-audio-mono 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 6d 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
Convert Audio to Mono
Overview
This skill converts the stereo audio channel of a media file (typically video or audio) to mono. It optimizes the process by copying the video stream without re-encoding to preserve video quality, and handles silent channels by extracting the active channel rather than a simple downmix.
When to Use
Use when a video or audio file's sound plays in only one ear/channel, or when a mono mix is requested.
Core Pattern
- Analyze Channel Volumes:
Run
ffmpeg -i <input> -filter_complex "[0:a]astats=metadata=1" -f null -to identify the peak and RMS volume of each channel. Note: Do not usereset=1in the filter, as it resets stats per frame. - Determine Extraction Strategy:
- If one channel is silent (volume ~ -90 dB or less) and the other has sound, isolate the active channel to avoid a 6 dB volume drop from normal averaging:
- Left channel only:
-af "pan=mono|c0=c0"(orFL) - Right channel only:
-af "pan=mono|c0=c1"(orFR)
- Left channel only:
- If both channels have active sound, use standard downmixing:
-ac 1
- If one channel is silent (volume ~ -90 dB or less) and the other has sound, isolate the active channel to avoid a 6 dB volume drop from normal averaging:
- Execute Conversion:
Run ffmpeg, copying the video stream to save time and preserve quality:
ffmpeg -i <input> -c:v copy -af "<filter>" -c:a aac -b:a 256k <output>
Common Mistakes
- Re-encoding video: Re-encoding the video stream degrades quality and takes significant time. Always use
-c:v copy. - Averaging silent channels: A simple
-ac 1downmix of a one-eared track averages it with silence, dropping the overall volume by 6 dB. Always analyze first and use thepanfilter for single-channel isolation.
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.
- 6d ago First seen · 32 lines · 34 tokens per session scan A 34460457b16e
convert-audio-mono is a skill published in the GitHub repository jackfranklin/dotfiles (254 stars, last pushed 5d ago), licensed MIT. It adds 34 tokens to every session and 482 once invoked, about $0.0002 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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