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Turn a project directory or a website URL into a short, shareable launch video with music, motion, and share copy. One file, no bundled assets — built entirely by the model with the tools already on t
The skill file stays in the publisher's repository.
Paste the copied command in a terminal. It installs this SKILL.md into that agent.
npx skills add latent-spaces/brag --skill brag-slim -a cursor -y
Turn a project directory or a website URL into a short, shareable launch video with music, motion, and share copy. One file, no bundled assets — built entirely by the model with the tools already on the machine. Use when someone says "/brag-slim", "let's /brag about this", "brag about a website", "make a launch video", or wants to show off what they built. If the /brag skill is also installed, let /brag handle those phrases; it hands off here on Opus 5.5.
Turn a project directory or a website URL into a short, shareable launch video with music, motion, and share copy. One file, no bundled assets — built entirely by the model with the tools already on the machine. Use when someone says "/brag-slim", "let's /brag about this", "brag about a website", "make a launch video", or wants to show off what they built. If the /brag skill is also installed, let /brag handle those phrases; it hands off here on Opus 5.5.
You built it. Now brag. You make the whole video yourself — story, visuals, audio, render — with whatever tools are on the machine.
Whatever the tone, it should feel like a modern, slick, polished launch video: nothing on screen or in the soundtrack that doesn't earn its place.
Usage: /brag-slim [input] [options]. Options (flags or plain language):
| Option | Default |
|---|---|
--tone <preset or freeform> | inferred; default if nothing clearly fits |
--format landscape|vertical|square | landscape (1920×1080; vertical 1080×1920, square 1080×1080), 30fps |
--duration <s> | about 20s |
Write the deliverables to brag-output/ in the current directory (timestamped brag-output-YYYY-MM-DD-HHmmss/ if it already exists). Keep every intermediate file (frames, downloads, scripts, stems) in a work/ subfolder inside it.
First decide what the input is, then gather material from it. Only the source changes; everything from the questions below onward is the same for every input.
| Input | How to recognize it | Where the material comes from |
|---|---|---|
| Project | No input given, and the current directory is a project | The code |
| Website | An http(s):// URL, or a bare domain like example.com | The live site |
If the input matches no type, or there's no input and the current directory isn't a project, ask the user what to brag about.
Read the code: the main page, styles (exact colors and fonts), README, routes and key components. The best material is the product in use — find its 2–3 beats: entry → key action → result.
You have the source, so use it directly: import or render the project's real components, stylesheets, fonts, images and animations in the video instead of rebuilding them.
Don't read build output (dist/, .next/, build/), lock files, test files, .git/, env and secret files (.env, .env.*), key and credential material (.pem, .key, id_rsa, service-account JSON, anything under secrets/ or credentials/), local config that commonly holds tokens, or anything .gitignore excludes for those reasons.
Get the site as a visitor sees it. Many sites build their page with JavaScript, so a plain download can come back as an almost empty shell. If it does, load the page in a headless browser to get the rendered result. Dismiss cookie banners and other overlays, and scroll section by section, since content that animates in on scroll stays blank in a single full-page capture.
work/.Before planning, answer: What is it (one sentence)? Who is it for, and what does it do for them? What sets it apart? What's the most impressive or funniest claim? What's the visual hook? What real UI or flow should be shown? What tone fits? What's the one-line share caption?
Everything gathered here can end up in a public video. Never carry secrets, API keys, tokens, internal hostnames or URLs, real customer or user names, email addresses, or other personal data into the plan, the video, or the share copy. If the real UI shows such data, swap in plausible fictional stand-ins and say so in the plan.
Write brag-plan.md: the angle, the hook, 2–3 highlights, the punchline, tone, visual identity, and a scene-by-scene storyboard with durations that sum to the target.
If the user points at one part — a new version, a new feature, one angle — make this the focus of the video.
Shape: Hook (2–3s) → Reveal (2–4s) → 2–3 sharp highlights → Punchline/outro (2–4s). A starting shape, not a template.
Presets are defaults; freeform direction ("fake Series A launch from 2016") refines or overrides them.
| Tone | Feel | Pacing / transitions |
|---|---|---|
default | Punchy, playful, clean | 4–5 scenes; soft transitions |
polished | Serious, elegant, restrained | 3–4 scenes, long holds; soft fades |
yc-parody | Deadpan startup launch, played straight | 4–5 scenes, one claim each; hard cuts |
chaotic | FAST, LOUD, ALL CAPS | 6–8 scenes, some under 2s; flash/zoom cuts |
deadpan | Calm, dry, nothing is a joke | 3–4 scenes, big empty space; slow fades |
cinematic | Trailer-scale, epic claims | 4–5 scenes, big type; dramatic wipes |
app-store | Clean feature cards | 4–6 scenes; smooth slides |
Write the music and sound effects as one piece: effects in the same key and the same space as the music, blended in rather than laid on top. Give it a basic, proper mix, the way a real track is mixed: effects sit softly under the music, nothing harsh or spiky, and repeated little sounds stay in the background.
Build it with whatever works on this machine. If you draw the video in a browser, make every frame a pure function of time and wait for fonts and images to load before capturing each one.
Before the full render, look at stills from every scene and from mid-transition, and fix overflow, collisions, and low contrast. A plain crossfade between two busy layouts makes a muddy double exposure; stagger it (old content out, then new content in) or dip through the background. Then render brag.mp4.
brag.jpg, and bake it in as frame 0 of brag.mp4 so every platform's thumbnail shows it. Replace frame 0 rather than adding a frame, so the duration and audio sync stay the same.share-copy.txt: 1–3 sentences, postable as-is, specific, matching the tone. No "excited to share."