Concat — workflow skill for AI editing agents

For AI agents: find the right skill in one call — curl -s "https://varg.ai/how-to/api/search?q=<what the person wants>" returns the matching how-to page and the best skills with install commands, as markdown (Russian works too). Full index: https://varg.ai/how-to/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the how-to page.

Free, local-first CapCut replacement with a built-in MCP server and JSON-RPC API so agents can cut video.

• Type: Workflow · AI editing agents
• Slug: concat
• Status: live
• Publisher: jub0t (community)
• License: AGPL-3.0
• Source: https://github.com/jub0t/Concat
• Works in: Claude Code, Any MCP client
• Cost: Free/open source (AGPL)
• Adoption: 12,100 GitHub stars (GitHub, 2026-10-27)

What it does

A cross-platform desktop editor positioned as an open CapCut alternative. Besides the usual timeline UI it ships an MCP server (concat --mcp) so Claude and other agents can edit with it, and a JSON-RPC API for scripts; a source build adds gRPC and a command-line tool.

Use when

• give an agent a free desktop editor to drive
• script edits over JSON-RPC
• replace CapCut without lock-in

Install

• Any MCP client: concat --mcp

More AI editing agents skills

• OpenMontage: Open-source agentic video studio: 12 pipelines (8 edit your footage), 100+ tools, ~140 skills. Run your agent in it.
• video-use: Drop raw takes in a folder, chat with your agent, get final.mp4: transcript-first cuts, grade, subtitles, overlays.
• FireRed-OpenStoryline: Conversational editing agent: finds media, writes the storyline, beat-syncs music and refines the cut by chat.
• ButterCut: Claude Code builds selects, scenes and rough cuts from your footage library and exports XML for FCP, Premiere, Resolve.
• Agentic Video Editor (ave): CLI where Gemini agents pick shots, trim, render with FFmpeg and score the result until a brief is met.
• OpenChatCut: Local-first chat video editor with a multi-track timeline that Codex and Claude Code can edit over MCP.

Run the generation on varg

varg is one API key for the models these skills drive — Seedance 2.5, Kling 4, Veo 3.1, Wan 3, Nano Banana 2.1, GPT Image 2.5, ElevenLabs v4 and 200+ more — billed in credits, with a cost estimate before anything runs.

• Claude Code: claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg (skill + hosted MCP)
• Codex, Cursor, Gemini CLI, OpenClaw: npx skills add vargHQ/skills --skill varg-ai -a <agent> -y
• Grok and any agent that reads SKILL.md: npx skills add vargHQ/skills --skill varg-ai, or point it at the skill's SKILL.md
• Claude.ai, ChatGPT, any MCP client: connect https://mcp.varg.ai/mcp
• API key: https://varg.ai/dashboard/api · Model specs: https://varg.ai/models/llms.txt