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 jqaisystems/jqai-ai-skills --skill media-spec-checkergit clone --depth 1 https://github.com/jqaisystems/jqai-ai-skillsWrote 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/jqaisystems/jqai-ai-skills/media-spec-checker)<a href="https://agentmods.dev/skills/jqaisystems/jqai-ai-skills/media-spec-checker"><img src="https://agentmods.dev/badge/skills/jqaisystems/jqai-ai-skills/media-spec-checker/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/jqaisystems/jqai-ai-skills/media-spec-checker"><img src="https://agentmods.dev/badge/skills/jqaisystems/jqai-ai-skills/media-spec-checker.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 | $0.00060 | $0.00490 |
| Opus 5.5 | $0.00024 | $0.00196 |
| Sonnet 5.5 | $0.00012 | $0.00098 |
| Haiku 4.5 | $0.00006 | $0.00049 |
Grade A, and why
media-spec-checker 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 3d 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 — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Media Spec Checker
Turn a supplied delivery specification into reproducible checks without changing the media.
Workflow
-
Identify the exact local files and intended delivery requirements. Do not infer current platform limits from memory.
-
Read the rules contract. Adapt the fictional profile to the supplied specification. Omitted checks are not performed.
-
Run the helper, using a finite timeout:
python scripts/check_media.py sample-media --rules rules.json --recursive --json -
Explain each failure and each unverified measurement. Missing tools, malformed media, unsupported files, absent durations, or an unconfigured media type are not passes.
-
Return measured values, the requirements used, the report counts, and the smallest suggested correction. Do not convert or alter files unless a separate task authorizes it.
Dependencies and limits
Python 3.11 or newer. Image inspection requires Pillow; video inspection requires ffprobe on PATH. Explain missing dependencies without installing anything automatically. Animated image timing is measured when frame delays are available; static images have no duration. Display dimensions account for image orientation and right-angle video rotation; video display ratio also uses sample aspect ratio.
The timeout bounds each ffprobe process, not Pillow decoding. Image inspection uses Pillow's decompression-bomb protection; very large or many-frame inputs can still require substantial local work.
The checker inspects supported local containers, not playback quality, visual legibility, accessibility, licensing, or platform acceptance. It does not run network probes, re-encode media, or remove metadata. Unknown files in a selected folder remain visible as unverified.
Privacy and output
Reports contain selected measurements and relative filenames, not arbitrary embedded tags. Filenames can still identify projects; keep real reports private and use generated assets for public examples. Linked directories and files are not followed.
What ships with it
5 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.
- 3d ago First seen · 34 lines · 60 tokens per session scan A 120cb71ae021
media-spec-checker is a skill published in the GitHub repository jqaisystems/jqai-ai-skills (3 stars, last pushed 4d ago), licensed MIT. It adds 60 tokens to every session and 490 once invoked, about $0.0002 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 2026-10-15.
Other skills, from other repositories
reins
Drive the user's real, logged-in browser from the shell via the reins CLI. Because it's their actual browser, every site is already authenticated — so you can scrape behind logins, read cookies/tokens/localStorage, watch and replay live API traffic, call a site's own API as the signed-in user, and…
baoyu-comic
A tool for creating original educational comics that explain knowledge or ideas through multiple illustrated panels. It supports different art styles and tones and can create several comics in one batch.
baoyu-diagram
Create professional, dark-themed SVG diagrams of any type — architecture diagrams, flowcharts, sequence diagrams, structural diagrams, mind maps, timelines, illustrative/conceptual diagrams, and more. Use this skill whenever the user asks for any kind of technical or conceptual diagram, visualization of a system…
playwright-cli
Automates browser interactions for testing and validating your own web applications using playwright-cli. Use when you need terminal-first browser control for navigation, form filling, screenshots, tracing, bound browser sessions, debugging, or generating Playwright test code. Only use against applications you own or…
agent-wiki
Incremental LLM-friendly wiki generator for Obsidian note vaults. Use when: (1) Building wiki from notes, (2) Ingesting notes to wiki, (3) Obsidian LLM wiki, (4) Incremental knowledge base management. Triggers: 'build wiki from notes', 'ingest notes to wiki', 'Obsidian LLM wiki', 'incremental knowledge base'.
better-prompt
A prompt editor that turns rough instructions for AI systems into clearer, more complete prompts. It follows published OpenAI and Anthropic guidance.