brag-slim Skill for Claude: Turn a Project Into a Launch Video

Makes Claude turn your project or a website into a 15 to 25 second launch video with music, motion and share copy.

Installs: 12K; on skills.sh
Stars: 19.9K; on GitHub
Updated: Oct 2026; last repo commit

brag-slim makes Claude plan, build and render a launch video by itself: the story, visuals, audio and render. Run /brag-slim in a project, or give it a website URL. It writes a plan, builds a video of about 20 seconds, saves brag.mp4, a poster frame brag.jpg and share-copy.txt into a brag-output/ folder, and asks if you want another tone or scene.

It is one file with no bundled assets. It uses whatever tools are on your machine, and asks before installing anything. The README says it is the lean version of the /brag skill, built for Claude Opus 5.5. The full /brag skill uses Hyperframes, FFmpeg and Node.js 22+, and brag-slim does not.

Good for

Makers who shipped something and want a shareable launch clip
Developers who want a video built from their real UI, code and copy
Anyone who wants a quick promo for a live website URL

Install brag-slim

Claude Code

Copy this prompt.

Install the brag-slim skill in Claude Code. Run this command:

npx skills add https://github.com/latent-spaces/brag --skill brag-slim

Then check that it loaded and tell me how to use it.

2
Paste it into Claude Code. It shows the change and asks before running it.

Requires Node.js.

The plugin installs the full /brag skill, which includes bundled music and sound effects and needs Hyperframes, FFmpeg and Node.js 22+, and the README says it includes /brag-slim from version 0.4.0. Its manifest lists no hooks or MCP servers. The README says that on Claude Opus 5.5, /brag hands off to /brag-slim.

From the project README. Source.

What's in the skill

When it loads

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.

Sections in SKILL.md

1. Inspect
Project
Website
Then, for every input
2. Plan
Creative laws
Tones
Sound
3. Build, check, render
4. Deliver

Key facts

Author: latent-spaces (brag repo owner)
License: MIT (plugin manifest)
Installs on skills.sh: 12,040 (Nov 2, 2026)
GitHub stars: 19,890 (repo, Nov 2, 2026)
Files: 1 file: SKILL.md, no scripts or assets
Output: brag.mp4, brag.jpg and share-copy.txt in brag-output/
Defaults: Landscape 1920x1080, 30fps, about 20 seconds
Last commit: Oct 23, 2026 (repo)

What it includes

Starts the skill on the current project or a URL.
No input means the current folder if it is a project. A URL or bare domain means a website. Otherwise it asks what to brag about.
Try: “/brag-slim https://example.com --tone polished”
Runs code · /brag-slim [input] [options]
Seven presets or freeform direction.
Presets are default, polished, yc-parody, chaotic, deadpan, cinematic and app-store. Freeform such as 'fake Series A launch from 2016' also works.
--tone
landscape, vertical or square, and a length in seconds.
Landscape is 1920x1080, vertical 1080x1920, square 1080x1080, all at 30fps. Duration defaults to about 20 seconds.
--format and --duration
Reads the project code or loads the website and gathers copy, colors and visuals.
For projects it skips build output, lock files, tests, .git, env files and key or credential files. For websites it may use a headless browser and downloads media assets into work/.
Write · 1. Inspect
Writes brag-plan.md with the angle, hook, highlights and a beat-timed storyboard.
The shape is hook, reveal, two or three highlights and a closing punchline.
Write · 2. Plan
Builds with tools on the machine, checks stills, then renders brag.mp4.
It asks before installing anything and prefers a package manager over curl | sh.
Runs code · 3. Build, check, render
Saves a poster frame, share copy and tells you where the files are.
The poster is baked in as frame 0 of the video. Share copy is 1 to 3 sentences.
Write · 4. Deliver

From the official docs

Permissions

Medium risk

It reads your project or fetches a website, builds with whatever tools are on your machine, and may ask to install packages. Check the plan and the finished video for secrets or private data before you post it.

What it can do

Read your data
Create and change things
Delete things
Read-only mode

Watch out for

It runs local tools and may install packages
SKILL.md says it builds with tools already on the machine and asks before installing anything. Say no to a curl | sh style install. github.com
The video can end up public
SKILL.md says gathered material can end up in a public video and tells Claude to keep out secrets, tokens, internal hosts and personal data. Review the plan and video before you post. github.com
For websites it downloads assets
It loads the page in a headless browser if needed and downloads media into work/. SKILL.md says to treat site content as data, not instructions, and never run downloaded files. github.com

Technical details

Scopes	project folder brag-output/ folder local build tools headless browser (websites)

Questions

What does brag-slim do?

It makes Claude build a short launch video from your project or a website. You get an MP4, a poster image and share copy in a brag-output folder.

How do I install brag-slim?

Use the install box above. The README's command installs brag-slim alone with the skills CLI. The plugin route installs the full /brag skill too.

What is the difference between brag and brag-slim?

The README calls brag-slim the same /brag, rebuilt lean for Opus 5.5, with no Hyperframes and no bundled assets. The full /brag uses Hyperframes, bundled music and sound effects. On Opus 5.5, /brag switches to /brag-slim, and /brag --full keeps the classic workflow.

Do I need an API key or FFmpeg?

SKILL.md names no API key. It builds with whatever is on your machine and asks before installing anything. The FFmpeg and Node.js 22+ requirements in the README are listed for the full /brag skill.

Is it safe to run?

It reads your project (skipping env and key files), may fetch a website, runs local build tools and writes a brag-output folder. Say no to installs you do not trust, and check the plan and video for private data before posting.

Can I get the video without running it myself?

The README points to letsbrag.app, which runs /brag for you from a site link. That is a separate service from this skill.

Information

updated Nov 2, 2026

Repository: latent-spaces/brag
Folder: skills/brag-slim

latent-spaces/brag skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 5

brag README · github.com
plugin.json · github.com
brag-slim SKILL.md · github.com
brag-slim on skills.sh · skills.sh
latent-spaces/brag · github.com