Concat
Concat is an open‑source, command‑line video editor that lets you stitch, trim and add basic effects to clips—essentially a self‑hosted CapCut for fast marketing videos.
- •You need to batch‑process dozens of short promo clips without paying for a SaaS editor.
- •Your team prefers a lightweight CLI that can run in CI/CD pipelines to generate video assets automatically.
- •You want full control over video processing on‑premise to avoid data‑privacy concerns.
concat -i product_demo.mp4 testimonial.mp4 logo_loop.mp4 -filter overlay=logo.png,position=bottom_right -o marketing_video.mp4
Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.
Installs with a command or two; your AI agent can do it for you.
mkdir -p ~/.claude/skills/d18b4584-646c-4c4e-a4f1-7703e3fbbac3 && curl -fsSL https://workflowstacks.com/api/skills/d18b4584-646c-4c4e-a4f1-7703e3fbbac3/claude-skill -o ~/.claude/skills/d18b4584-646c-4c4e-a4f1-7703e3fbbac3/SKILL.mdOpens the app with this repo with the prompt ready to go — no copy-paste needed.
Concat is a very large Rust project (~65k lines across 138 code files, plus 2 test files). Setup is light: installs like a normal app. Reading the code is optional. Last commit this month, AGPL-3.0 license, has a test suite.
- 1README.mdStart here — what it does and how to install it
- 2src/README.mdInside src/ — the main logic begins here
Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.
Installs with a command or two; your AI agent can do it for you.
mkdir -p ~/.claude/skills/d18b4584-646c-4c4e-a4f1-7703e3fbbac3 && curl -fsSL https://workflowstacks.com/api/skills/d18b4584-646c-4c4e-a4f1-7703e3fbbac3/claude-skill -o ~/.claude/skills/d18b4584-646c-4c4e-a4f1-7703e3fbbac3/SKILL.mdOpens the app with this repo with the prompt ready to go — no copy-paste needed.
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Do this with a working workflow
Pages we wrote and tested that put a skill like this to work — importable n8n templates, outcome guides and Claude Desktop configs.
Automate your content repurposing
One private form, one paste, four formats back by email — every time you publish. It removes the manual reshaping that stalls content programs.
Free n8n templateContent Repurposer
Paste one blog post or script into a private form and get back a LinkedIn post, an X thread, an Instagram caption, and an email blurb — in your voice.
Outcome guideRepurpose blog posts into social media content
Paste one piece of content into a private form and the workflow emails you back four ready-to-post formats — LinkedIn, X thread, Instagram, and an email blurb — all in the original’s voice.
Related skills
More automation tools founders pair with this one.