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.
git clone --depth 1 https://github.com/ratnesh-maurya/cursor-claude-personasWrote 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/rules/ratnesh-maurya/cursor-claude-personas/rules-get-video-duration)<a href="https://agentmods.dev/rules/ratnesh-maurya/cursor-claude-personas/rules-get-video-duration"><img src="https://agentmods.dev/badge/rules/ratnesh-maurya/cursor-claude-personas/rules-get-video-duration/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/rules/ratnesh-maurya/cursor-claude-personas/rules-get-video-duration"><img src="https://agentmods.dev/badge/rules/ratnesh-maurya/cursor-claude-personas/rules-get-video-duration.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 | $0.00013 | $0.00331 |
| Opus 5 | $0.00006 | $0.00166 |
| Sonnet 5 | $0.00003 | $0.00066 |
| Haiku 4.5 | $0.00001 | $0.00033 |
Grade A, and why
get-video-duration 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 7d 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
Getting video duration with Mediabunny
Mediabunny can extract the duration of a video file. It works in browser, Node.js, and Bun environments.
Getting video duration
import { Input, ALL_FORMATS, UrlSource } from "mediabunny";
export const getVideoDuration = async (src: string) => {
const input = new Input({
formats: ALL_FORMATS,
source: new UrlSource(src, {
getRetryDelay: () => null,
}),
});
const durationInSeconds = await input.computeDuration();
return durationInSeconds;
};
Usage
const duration = await getVideoDuration("https://remotion.media/video.mp4");
console.log(duration); // e.g. 10.5 (seconds)
Using with local files
For local files, use FileSource instead of UrlSource:
import { Input, ALL_FORMATS, FileSource } from "mediabunny";
const input = new Input({
formats: ALL_FORMATS,
source: new FileSource(file), // File object from input or drag-drop
});
const durationInSeconds = await input.computeDuration();
Using with staticFile in Remotion
import { staticFile } from "remotion";
const duration = await getVideoDuration(staticFile("video.mp4"));
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.
- 7d ago First seen · 59 lines · 13 tokens per session scan A 7b31fab3cbf9
get-video-duration is a cursor rule published in the GitHub repository ratnesh-maurya/cursor-claude-personas (8 stars, last pushed 5mo ago), licensed MIT. It adds 13 tokens to every session and 331 once invoked, about $0.0001 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 2026-09-03.
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agents
Always-loaded project anchor. Read this first. Contains project identity, non-negotiables, commands, and pointer to ROUTER.md for full context.