Case 04164

Skill knownasnaffy/prompthound/dataset/case_04164

A fast, offline static risk analysis CLI for AI agent skill files. Detects malicious instructions, steganographic payloads, and dangerous capability chains.

Install

npx -y skills add knownasnaffy/prompthound --skill case_04164

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What its author says it does

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Create product demo videos by automating browser interactions and capturing frames. Use when the user wants to record a demo, walkthrough, product showcase, or interactive video of a web application. Supports Playwright CDP screencast for high-quality capture and FFmpeg for video encoding.

SKILL.md

2.8 KB, 638 tokens by cl100k_base, as published. Nobody here has run it

Demo Video Creator

Create polished product demo videos by automating browser interactions.

Overview

Plan the demo sequence (pages, interactions, timing)
Record frames using Playwright CDP screencast
Encode to video with FFmpeg

Quick Start

Prerequisites

Clawdbot browser running (browser action=start profile=clawd)
App accessible via browser (localhost or remote)
FFmpeg installed for encoding

Recording Workflow

Start the Clawdbot browser if not running
Navigate to the app manually or via browser action=open
Customize scripts/record-demo.js for the target app
Run: node scripts/record-demo.js
Encode: bash scripts/frames-to-video.sh

Planning a Demo

See references/demo-planning.md for guidance on:

Structuring demo sequences
Timing and pacing
Interaction patterns
What makes demos compelling

Scripts

`scripts/record-demo.js`

Template Playwright script that:

Connects to Clawdbot browser via CDP
Starts screencast capture (JPEG frames)
Executes demo sequence (navigation, clicks, hovers, typing)
Saves frames to output directory

Customize for each demo:

DEMO_SEQUENCES array - define pages and interactions
OUTPUT_DIR - where to save frames
FRAME_SKIP - skip every Nth frame (lower = more frames)

`scripts/frames-to-video.sh`

FFmpeg encoding script with presets:

mp4 - H.264, good quality/size balance (default)
gif - Animated GIF for embedding
webm - VP9, smaller files

Usage: ./frames-to-video.sh [input_dir] [output_name] [format]

Interaction Patterns

// Navigation
await page.goto('http://localhost/dashboard');
await page.waitForTimeout(2000);

// Click element
await page.locator('button:has-text("Create")').click();
await page.waitForTimeout(500);

// Hover (show tooltips, hover states)
await page.locator('.card').first().hover();
await page.waitForTimeout(1000);

// Type text
await page.locator('input[placeholder="Search"]').fill('query');
await page.waitForTimeout(500);

// Press key
await page.keyboard.press('Enter');
await page.keyboard.press('Escape');

// Scroll
await page.evaluate(() => window.scrollBy(0, 300));

Tips

Timing: 2s on page load, 0.5-1s between interactions, 1.5s to show results
Frame skip: Use 3-5 for smooth video, 8-10 for smaller files
Quality: 85-90 JPEG quality balances size and clarity
Resolution: Browser window size determines output resolution
Loops: GIFs should loop seamlessly - end where you started

What ships with it: 3 files

9.3 KB alongside SKILL.md, 2 of them executable

references/

demo-planning.md2.7 KB

scripts/

frames-to-video.shruns2.4 KB
record-demo.jsruns4.2 KB