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 damionrashford/media-os --skill audio-jackgit clone --depth 1 https://github.com/damionrashford/media-osWrote 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/damionrashford/media-os/audio-jack)<a href="https://agentmods.dev/skills/damionrashford/media-os/audio-jack"><img src="https://agentmods.dev/badge/skills/damionrashford/media-os/audio-jack/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/damionrashford/media-os/audio-jack"><img src="https://agentmods.dev/badge/skills/damionrashford/media-os/audio-jack.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 | $0.00191 | $0.03324 |
| Opus 5.5 | $0.00076 | $0.01330 |
| Sonnet 5.5 | $0.00038 | $0.00665 |
| Haiku 4.5 | $0.00019 | $0.00332 |
Grade A, and why
audio-jack 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 1mo 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 — 320 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Audio JACK
Context: $ARGUMENTS
Quick start
- Start a JACK server: → Step 1 (
jackctl.py start) - List ports / connections: → Step 2 (
jackctl.py ports) - Connect two clients: → Step 3 (
jackctl.py link) - Check buffer size / rate / CPU: → Step 4 (
jackctl.py status) - Measure round-trip latency: → Step 5 (
jackctl.py latency) - Record N ports to WAV: → Step 6 (
jackctl.py record) - Send audio over the internet: → Step 7 (
jackctl.py jacktrip)
When to use
- User wants guaranteed low-latency routing between pro-audio apps that speak the JACK client API (Ardour, Reaper, Carla, SuperCollider, Pure Data, Bitwig, REAPER).
- User wants to bridge multichannel audio across the internet with JackTrip.
- User wants explicit control over period size / number of periods / sample rate.
- User's distro runs PipeWire — the libjack shim still answers all these commands, but see Gotchas.
Not for: generic Linux desktop routing (use audio-pipewire), macOS default-device
changes (use audio-coreaudio), Windows default-device changes (use audio-wasapi).
Step 1 — Start a JACK server
jackd accepts a single backend driver after -d. This wrapper picks a per-OS
default (alsa on Linux, coreaudio on macOS, portaudio on Windows).
uv run ${CLAUDE_SKILL_DIR}/scripts/jackctl.py start \
--rate 48000 --period 256 --nperiods 2
Force backend + device:
uv run ${CLAUDE_SKILL_DIR}/scripts/jackctl.py start \
--backend alsa --device hw:0 --rate 48000 --period 128
Typical period / nperiods:
| Scenario | --period |
--nperiods |
|---|---|---|
| Live performance, PCIe / Thunderbolt card | 64–128 | 2 |
| Tracking / monitoring, USB class-compliant | 128–256 | 3 |
| Mixing, offline | 512–1024 | 2 |
See references/backends.md for per-backend flag quirks.
On JACK2 systems with D-Bus, jack_control can drive the server instead — this
wrapper does not (jack_control is interactive by design; scripts should call
jackd directly as shown).
What ships with it
3 files 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.
- 1mo ago First seen · 320 lines · 191 tokens per session scan A d01ef880b639
audio-jack is a skill published in the GitHub repository damionrashford/media-os (21 stars, last pushed 4mo ago), licensed MIT. It adds 191 tokens to every session and 3,324 once invoked, about $0.0008 per session on Opus 5.5. 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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