add-captions

add-captions is a skill for Claude Code from DojoCodingLabs/remotion-superpowers. It costs 89 tokens per session (1,416 once invoked), scanned A, original, MIT.

A captioning workflow for adding animated subtitles to a Remotion video. It can create word-level captions from speech, use an existing SRT subtitle file, and apply TikTok, karaoke, YouTube, or minimal styles.

In plain words
What is it for?
Use it to add readable captions to voiceovers and clips, including highlighted word-by-word captions or subtitles with a selected style.
Why use it?
It removes the need to transcribe speech, split it into timed words, and position every caption manually. It can also use an existing transcript when one is already available.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the remotion-superpowers plugin — 15 skills, 3 agents, 2 hooks, 5 MCP servers shipped together

Good fit Use it to add readable captions to voiceovers and clips, including highlighted word-by-word captions or subtitles with a selected style.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dojocodinglabs/remotion-superpowers/add-captions
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add DojoCodingLabs/remotion-superpowers --skill add-captions
Clone the repo
git clone --depth 1 https://github.com/DojoCodingLabs/remotion-superpowers

Made for: Claude Code.

Or install remotion-superpowers, the plugin that ships this one along with the rest of its 15 skills, 3 agents, 2 hooks, 5 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for add-captions

README.md
[![agentmods](https://agentmods.dev/badge/skills/dojocodinglabs/remotion-superpowers/add-captions/github.svg)](https://agentmods.dev/skills/dojocodinglabs/remotion-superpowers/add-captions)
Your own site
<a href="https://agentmods.dev/skills/dojocodinglabs/remotion-superpowers/add-captions"><img src="https://agentmods.dev/badge/skills/dojocodinglabs/remotion-superpowers/add-captions/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for add-captions

Your own site · 80×15
<a href="https://agentmods.dev/skills/dojocodinglabs/remotion-superpowers/add-captions"><img src="https://agentmods.dev/badge/skills/dojocodinglabs/remotion-superpowers/add-captions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,416 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00089 $0.01416
Opus 5.5 $0.00036 $0.00566
Sonnet 5.5 $0.00018 $0.00283
Haiku 4.5 $0.00009 $0.00142

Measured today against content hash ecc6456dc69a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

add-captions scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/add-captions/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Captions: Animated Subtitles

You are helping the user add captions to their Remotion video.

Load the remotion-production skill for the captions-workflow rule (routes, presets and safe zones), and the official remotion-captions skill for transcription and display. For the Scribe fallback, also load the official ElevenLabs speech-to-text skill. The official skills win on any API detail.

Workflow

1. Identify the Audio Source

Find the voiceover or primary audio file(s):

ls public/ public/footage/ 2>/dev/null | grep -E '\.(mp3|wav|m4a|ogg|mp4|mov|webm|srt)$'

If the user already has an .srt file, use it (step 3). If no audio exists, suggest running /add-voiceover first. If the video has one voiceover per scene (vo-scene1.mp3, vo-scene2.mp3, …), caption each file separately.

Make sure Studio is already running (npx remotion studio, or --no-open with an in-app browser; open the URL it prints), so the user sees captions appear.

2. Choose Caption Style

Ask the user what style they want:

  • TikTok style (default): bold, a few words at a time, the active word pops in a highlight color. Needs word-level.
  • Karaoke style: full phrase on screen, words highlight as they're spoken. Needs word-level.
  • YouTube style: bottom of screen, a sentence at a time. Also works with the user's SRT.
  • Minimal: small, subtle, bottom-left. Also works with the user's SRT.

3. Transcribe

Both routes give word-level Caption JSON, so every style works. Save each file's result as public/<source>.captions.json (e.g. vo-scene1.captions.json).

Default: official whisper-webgpu. Follow official remotion-captions/transcribe-captions.md. It writes a Node script with @remotion/whisper-webgpu that outputs one Caption per word. Local and free. It needs a compatible GPU and doesn't run on Linux arm64. Use small.en for English; for other languages use a multilingual model and pass language.

Read the full file on GitHub · 79 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today First seen · 79 lines · 89 tokens per session scan A ecc6456dc69a

Subscribe to this mod's changes

add-captions is a skill published in the GitHub repository DojoCodingLabs/remotion-superpowers (145 stars, last pushed yesterday), licensed MIT. It adds 89 tokens to every session and 1,416 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-28.

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