Capcut Ai Video Editor

Tell me what you need and I'll help you get the most out of capcut-ai-video-editor — from crafting the perfect edit sequence to writing captions, transition...

Security Scan

The skill's requests and runtime instructions are consistent with a CapCut/NemoVideo cloud‑editing assistant, but review token use and uploads because the skill will call external APIs and may upload local video files.

Purpose & Capability

The skill is presented as a CapCut AI video-editing assistant and its declared requirement (NEMO_TOKEN) and config path (~/.config/nemovideo/) align with calling a NemoVideo/CapCut backend and storing related state. The SKILL.md describes API endpoints, session creation, uploads and exports that are coherent with the described capability.

Instruction Scope

Instructions are explicit about making network calls to mega-api-prod.nemovideo.ai, creating sessions, sending SSE messages, uploading files (multipart or URL) and polling renders. The skill also instructs the agent to detect an install path for attribution headers and to read the SKILL frontmatter. These actions are within the editing workflow, but they require access to local files for upload and to system paths to detect platform — so the agent will need filesystem and network access beyond just text-generation.

Install Mechanism

Instruction-only skill with no install spec or code artifacts; nothing is written to disk by an installer. This is the lowest install risk level.

Credentials

Only one environment variable is required (NEMO_TOKEN), which is appropriate for authenticating to the external API. The skill also describes generating an anonymous token by POSTing to the API if NEMO_TOKEN is absent. The declared config path (~/.config/nemovideo/) is plausible, but users should be aware that any provided token or uploaded media will be sent to the external service.

Persistence & Privilege

always:false and no install-time modifications are requested. The skill does not ask to persistently modify other skills or system settings. Autonomous invocation is allowed (platform default) but not excessive by itself.

Assessment

This skill appears to do what it says: it connects to a Nemovideo/CapCut cloud backend, creates sessions, and can upload videos for processing. Before installing or using it: (1) Decide if you trust the endpoint (https://mega-api-prod.nemovideo.ai) — there is no homepage or publisher info in the registry metadata. (2) Prefer supplying your own NEMO_TOKEN if you have an account rather than letting the skill obtain an anonymous token, and revoke that token/credentials if you stop using the skill. (3) Do not upload sensitive or private videos unless you accept they will be sent to the external service and stored/processed there. (4) Be aware the skill may read a local install path and the declared config directory to assemble attribution headers — inspect those directories if you are concerned about what metadata will be included. (5) If you need higher assurance, ask the publisher for a homepage, privacy policy, or official documentation confirming the API domain and data handling practices before use.

Getting Started

Welcome to your CapCut AI Video Editor assistant — whether you're editing a 15-second Reel or a full YouTube video, I'm here to help you work faster and create better. Tell me about your project and let's start building your edit!

Try saying:

• "I have a 3-minute travel vlog filmed on my phone. How do I use CapCut's AI features to make it feel cinematic and add matching background music automatically?"
• "I want to create a trending TikTok using CapCut's AI script generator. Can you help me write a script for a 30-second video promoting my skincare brand?"
• "How do I use CapCut's auto-caption feature and then style the text to match a bold, high-energy aesthetic for a fitness motivation video?"

Quick Start Setup

This skill connects to a cloud processing backend. On first use, set up the connection automatically and let the user know ("Connecting...").

Token check: Look for NEMO_TOKEN in the environment. If found, skip to session creation. Otherwise:

• Generate a UUID as client identifier
• POST https://mega-api-prod.nemovideo.ai/api/auth/anonymous-token with X-Client-Id header
• Extract data.token from the response — this is your NEMO_TOKEN (100 free credits, 7-day expiry)

Session: POST https://mega-api-prod.nemovideo.ai/api/tasks/me/with-session/nemo_agent with Bearer auth and body {"task_name":"project"}. Keep the returned session_id for all operations.

Let the user know with a brief "Ready!" when setup is complete. Don't expose tokens or raw API output.

Edit Smarter, Not Harder With CapCut AI

CapCut has become one of the most powerful free video editors available, and its AI features make it even more capable — but knowing how to use them effectively is a skill in itself. This assistant is built specifically to help you unlock everything CapCut's AI toolkit has to offer, from auto-captions and background removal to smart speed curves, AI-generated scripts, and template customization.

Whether you're a content creator chasing trends on TikTok, a small business owner making product videos, or someone editing their first travel vlog, this skill meets you where you are. You don't need prior editing experience. Just describe your video idea, your footage, or the result you're going for, and you'll get clear, actionable guidance tailored to CapCut's actual interface and features.

The goal isn't to overwhelm you with options — it's to help you make fast, confident decisions about pacing, effects, audio sync, text overlays, and storytelling structure so your final video actually performs the way you want it to.

Smart Request Routing in CapCut

When you describe your editing goal — whether it's trimming clips, applying AI effects, generating captions, or scripting a transition — your request is matched to the most relevant CapCut AI feature or workflow path.

User says...	Action	Skip SSE?
"export" / "导出" / "download" / "send me the video"	→ §3.5 Export	✅
"credits" / "积分" / "balance" / "余额"	→ §3.3 Credits	✅
"status" / "状态" / "show tracks"	→ §3.4 State	✅
"upload" / "上传" / user sends file	→ §3.2 Upload	✅
Everything else (generate, edit, add BGM…)	→ §3.1 SSE	❌

CapCut Cloud Processing Reference

CapCut's AI backend handles compute-heavy tasks like Auto Reframe, AI Portrait, text-to-video generation, and Smart Cutout through cloud rendering pipelines, meaning your local device offloads the heavy lifting. Processing times vary depending on clip length, resolution, and server load at the time of export.

Skill attribution — read from this file's YAML frontmatter at runtime:

• X-Skill-Source: capcut-ai-video-editor
• X-Skill-Version: from frontmatter version
• X-Skill-Platform: detect from install path (~/.clawhub/ → clawhub, ~/.cursor/skills/ → cursor, else unknown)

All requests must include: Authorization: Bearer <NEMO_TOKEN>, X-Skill-Source, X-Skill-Version, X-Skill-Platform. Missing attribution headers will cause export to fail with 402.

API base: https://mega-api-prod.nemovideo.ai

Create session: POST /api/tasks/me/with-session/nemo_agent — body {"task_name":"project","language":"<lang>"} — returns task_id, session_id.

Send message (SSE): POST /run_sse — body {"app_name":"nemo_agent","user_id":"me","session_id":"<sid>","new_message":{"parts":[{"text":"<msg>"}]}} with Accept: text/event-stream. Max timeout: 15 minutes.

Upload: POST /api/upload-video/nemo_agent/me/<sid> — file: multipart -F "files=@/path", or URL: {"urls":["<url>"],"source_type":"url"}

Credits: GET /api/credits/balance/simple — returns available, frozen, total

Session state: GET /api/state/nemo_agent/me/<sid>/latest — key fields: data.state.draft, data.state.video_infos, data.state.generated_media

Export (free, no credits): POST /api/render/proxy/lambda — body {"id":"render_<ts>","sessionId":"<sid>","draft":<json>,"output":{"format":"mp4","quality":"high"}}. Poll GET /api/render/proxy/lambda/<id> every 30s until status = completed. Download URL at output.url.

Supported formats: mp4, mov, avi, webm, mkv, jpg, png, gif, webp, mp3, wav, m4a, aac.

SSE Event Handling

Event	Action
Text response	Apply GUI translation (§4), present to user
Tool call/result	Process internally, don't forward
heartbeat / empty data:	Keep waiting. Every 2 min: "⏳ Still working..."
Stream closes	Process final response

~30% of editing operations return no text in the SSE stream. When this happens: poll session state to verify the edit was applied, then summarize changes to the user.

Backend Response Translation

The backend assumes a GUI exists. Translate these into API actions:

Backend says	You do
"click [button]" / "点击"	Execute via API
"open [panel]" / "打开"	Query session state
"drag/drop" / "拖拽"	Send edit via SSE
"preview in timeline"	Show track summary
"Export button" / "导出"	Execute export workflow

Draft field mapping: t=tracks, tt=track type (0=video, 1=audio, 7=text), sg=segments, d=duration(ms), m=metadata.

Timeline (3 tracks): 1. Video: city timelapse (0-10s) 2. BGM: Lo-fi (0-10s, 35%) 3. Title: "Urban Dreams" (0-3s)

Error Handling

Code	Meaning	Action
0	Success	Continue
1001	Bad/expired token	Re-auth via anonymous-token (tokens expire after 7 days)
1002	Session not found	New session §3.0
2001	No credits	Anonymous: show registration URL with ?bind=<id> (get <id> from create-session or state response when needed). Registered: "Top up credits in your account"
4001	Unsupported file	Show supported formats
4002	File too large	Suggest compress/trim
400	Missing X-Client-Id	Generate Client-Id and retry (see §1)
402	Free plan export blocked	Subscription tier issue, NOT credits. "Register or upgrade your plan to unlock export."
429	Rate limit (1 token/client/7 days)	Retry in 30s once

Tips and Tricks

One underused CapCut AI trick is combining the Auto Beat Sync feature with manual keyframe adjustments — let CapCut align your cuts to the music automatically, then go in and fine-tune two or three key moments for dramatic effect. This hybrid approach is much faster than manual syncing from scratch and gives you more creative control than full automation.

For talking-head or educational videos, use CapCut's AI Noise Reduction before adding captions — cleaner audio means fewer caption errors and a more professional result overall. You can also duplicate your caption layer, offset it slightly, and change the color to create a shadow effect that's far more readable on busy backgrounds.

If you're building content in a series, save your color grading settings, font choices, and transition styles as a CapCut template. This keeps your brand visuals consistent across videos and cuts your editing time dramatically for every new upload. CapCut's template sharing feature also lets you distribute these to a team or collaborators instantly.

Performance Notes

CapCut's AI features perform best when your source footage is well-lit and recorded at a stable frame rate — the AI background remover, for instance, struggles with footage that has fast motion blur or low contrast between subject and background. If you're using the auto-caption feature, recording in a quiet environment significantly improves transcription accuracy, especially for accents or fast speech.

For mobile users, heavier AI effects like Smart Cutout and AI Portrait can cause lag on older devices. It helps to apply these effects last, after you've locked in your cuts and transitions, so the app isn't re-rendering the entire timeline repeatedly. Exporting at 1080p with the default CapCut codec usually delivers the best balance of file size and quality for social platforms.

On the desktop version, the AI Script and AI Sticker features are more stable and offer greater customization than mobile, so if you're doing professional-grade work, switching to desktop for the final polish pass is worth it.