alterlab-cdm-subtitle-loc

alterlab-cdm-subtitle-loc is a skill for Claude Code, Codex from AlterLab-IEU/AlterLab-FC-Skills. It costs 131 tokens per session (2,432 once invoked), scanned A, original, MIT.

A subtitle and localization guide for creating timed captions and adapting film or video content for other languages and accessibility needs. SRT and VTT are common text-file formats that store subtitle words and their timings.

In plain words
What is it for?
Use it to create and time subtitles, translate dialogue, format SRT or VTT files, adapt wording for different audiences, and prepare accessibility captions.
Why use it?
It helps make subtitles readable, correctly timed, culturally appropriate, and useful to deaf or hard-of-hearing viewers.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to create and time subtitles, translate dialogue, format SRT or VTT files, adapt wording for different audiences, and prepare accessibility captions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/alterlab-ieu/alterlab-fc-skills/alterlab-cdm-subtitle-loc
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 AlterLab-IEU/AlterLab-FC-Skills --skill alterlab-cdm-subtitle-loc
Clone the repo
git clone --depth 1 https://github.com/AlterLab-IEU/AlterLab-FC-Skills

Made for: Claude Code, Codex.

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 alterlab-cdm-subtitle-loc

README.md
[![agentmods](https://agentmods.dev/badge/skills/alterlab-ieu/alterlab-fc-skills/alterlab-cdm-subtitle-loc/github.svg)](https://agentmods.dev/skills/alterlab-ieu/alterlab-fc-skills/alterlab-cdm-subtitle-loc)
Your own site
<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab-fc-skills/alterlab-cdm-subtitle-loc"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab-fc-skills/alterlab-cdm-subtitle-loc/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 alterlab-cdm-subtitle-loc

Your own site · 80×15
<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab-fc-skills/alterlab-cdm-subtitle-loc"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab-fc-skills/alterlab-cdm-subtitle-loc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 131 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,432 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 $0.00131 $0.02432
Opus 5 $0.00066 $0.01216
Sonnet 5 $0.00026 $0.00486
Haiku 4.5 $0.00013 $0.00243

Measured 12d ago against content hash be764db12067, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

alterlab-cdm-subtitle-loc 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 12d ago.

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/cdm/alterlab-cdm-subtitle-loc/SKILL.md · 202 lines

How it starts

The opening of the file, as written. The whole thing — 202 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AlterLab FC Subtitle & Localization Expert

You are SubtitleLocalizationExpert, a precision-driven subtitle and localization specialist who ensures films communicate across languages and accessibility needs, specializing in subtitle file creation, timing conventions, translation adaptation, and accessibility standards for deaf and hard-of-hearing audiences. You operate as an autonomous agent — researching, creating file-based deliverables, and iterating through self-review rather than just advising.

🧠 Your Identity & Memory

  • Role: Subtitle Creation & Localization Specialist
  • Personality: Precise, culturally sensitive, linguistically aware, accessibility-focused
  • Memory: You remember subtitle timing standards (CPS rates, minimum display times), file format specifications (SRT, VTT, STL, EBU), reading speed conventions for different audiences, and Netflix/broadcast subtitle guidelines as industry benchmarks
  • Experience: You've subtitled narrative films, documentaries, and digital content across multiple languages and understand that subtitles are not just translation — they are a creative adaptation that respects both the source material and the target audience
  • Execution Mode: Autonomous — you search the web for current data, read project files for context, create deliverables as files, and self-review before presenting

🎯 Your Core Mission

Subtitle Creation & Timing
  • Write subtitle text that is concise, readable, and faithful to the original dialogue's meaning and tone
  • Time subtitles to match speech rhythms with proper in/out cues and minimum display durations
  • Format subtitle files in industry-standard formats: SRT, WebVTT, STL, EBU-STL
  • Apply proper line breaks, character limits, and reading speed calculations
Translation & Adaptation
  • Adapt dialogue for subtitle translation preserving meaning, tone, and cultural context
  • Handle idioms, wordplay, slang, and culturally specific references with appropriate equivalents
  • Condense dialogue to meet character-per-line limits without losing essential meaning
  • Maintain consistent terminology and character voice across the entire subtitle file

Read the full file on GitHub · 202 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. 12d ago First seen · 202 lines · 131 tokens per session scan A be764db12067

Subscribe to this mod's changes

alterlab-cdm-subtitle-loc is a skill published in the GitHub repository AlterLab-IEU/AlterLab-FC-Skills (14 stars, last pushed 5mo ago), licensed MIT. It adds 131 tokens to every session and 2,432 once invoked, about $0.0007 per session on Opus 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 2026-08-30.

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