toBeBetterJavaer: Skill for Codex

.agents/skills/video-cover-image/SKILL.md

video-cover-image is a skill for Codex from itwanger/toBeBetterJavaer. It costs 113 tokens per session (3,884 once invoked), scanned A, original, no licence file.

A skill for creating matching cover images for short technical videos. It produces 3:4, 16:9, and 4:3 versions for platforms such as Xiaohongshu, Douyin, Bilibili, and Kuaishou.

In plain words
What is it for?
Use it to make video covers from toBeBetterJavaer scripts or AI and Java topics, including text-based designs and covers matched to a reference image.
Why use it?
It turns a video script or technical topic into a repeatable set of platform-specific cover formats and styles.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: installed under .agents/ (shared by several agents).

This is itwanger/toBeBetterJavaer's own configuration. It tells Codex how to work on toBeBetterJavaer itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything toBeBetterJavaer configures →

Reuse

Borrowing it

Nothing to install: this file belongs to itwanger/toBeBetterJavaer. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/itwanger/toBeBetterJavaer/master/.agents/skills/video-cover-image/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/itwanger/toBeBetterJavaer

Made for: 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 video-cover-image

README.md
[![agentmods](https://agentmods.dev/badge/skills/itwanger/tobebetterjavaer/video-cover-image/github.svg)](https://agentmods.dev/skills/itwanger/tobebetterjavaer/video-cover-image)
Your own site
<a href="https://agentmods.dev/skills/itwanger/tobebetterjavaer/video-cover-image"><img src="https://agentmods.dev/badge/skills/itwanger/tobebetterjavaer/video-cover-image/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 video-cover-image

Your own site · 80×15
<a href="https://agentmods.dev/skills/itwanger/tobebetterjavaer/video-cover-image"><img src="https://agentmods.dev/badge/skills/itwanger/tobebetterjavaer/video-cover-image.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,884 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin unknown 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 $0.00113 $0.03884
Opus 5.5 $0.00045 $0.01554
Sonnet 5.5 $0.00023 $0.00777
Haiku 4.5 $0.00011 $0.00388

Measured 18d ago against content hash 61289a825683, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

video-cover-image 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 18d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/render_text_cover.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.agents/skills/video-cover-image/SKILL.md · 213 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 18d ago Changed · +8 lines 61289a825683
  2. 1mo ago Changed · +1 lines 9425409b453e
  3. 2mo ago First seen · 204 lines · 113 tokens per session scan A 54d4d2b38ba2

Subscribe to this mod's changes

video-cover-image is a skill published in the GitHub repository itwanger/toBeBetterJavaer (17,826 stars, last pushed yesterday), with no licence file. It adds 113 tokens to every session and 3,884 once invoked, about $0.0005 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 2026-08-30.

Related

video-cover-image compared with skills from other repositories

video-cover-image next to 6 skills from other repositories
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validatealexmond/jhelmSkill74d agoApache-2.0A22Claude Code