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Agent skill

KrillinAI Cover Image

by krillinai in krillinai/OpenCreator

Generates a cover image with the KrillinAI CLI from a finished image prompt, then checks the output files, the saved prompt and the manifest.

Apache-2.0Auto-check passedMedia & Creative

Install KrillinAI Cover Image

skills CLI
$ npx skills add krillinai/OpenCreator --skill krillinai-cover -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install krillinai/OpenCreator krillinai-cover --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/krillinai/OpenCreator.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/krillinai-cover .claude/skills/krillinai-cover && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
krillinai-cover
GitHub stars
13k
Token cost
~441 tokens
SKILL.md length
169 words
Files
1
Skills in repo
8
Repo updated
First seen
Licence
Apache-2.0

At a glance

Generates a cover image with the KrillinAI CLI from a finished image prompt, then checks the output files, the saved prompt and the manifest.

  • Creating a cover image for a video from a fully written prompt
  • SKILL.md covers Command, Inputs, Outputs and Dry Run, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Checking an image-provider setup with a dry run before generating anything

What it does

The skill wraps the cover command of the KrillinAI CLI. The agent supplies a prompt that already holds the title text, language, composition, visual style and any context from the source video, because the current CLI has no reference-image argument and does not send origin_cover.jpg to the image model. It reads the CLI contract reference first for the binary location, working directory, configuration and JSON behavior.

Inputs are --workdir, the required --prompt, and an optional --size that defaults to 1024x1024, with the image provider set in the config/config.toml file. Outputs are generated_cover.png, cover_prompt.final.txt and krillinai_manifest.json. A --dry-run validates the command and writes a manifest without calling the image model. Success means terminal JSON with ok set to true, a non-empty decodable image and a prompt file that matches what was submitted; missing provider configuration is reported as an error.

When your agent uses it

  • Creating a cover image for a video from a fully written prompt
  • Checking an image-provider setup with a dry run before generating anything
  • Verifying that a generated cover and its saved prompt match

Example prompts

  • “Generate a cover for my cooking video with the title text Five-Minute Pasta in a bright flat illustration style.”
  • “Run the cover command in dry-run mode and tell me whether the manifest was written.”
  • “Make a 1024x1024 cover for the Spanish dubbed version, with the title written in Spanish.”

Requirements

  • The KrillinAI CLI
  • An image provider configured in config/config.toml

What it can do on your machine

Read from SKILL.md and the folder at commit 837dbb4. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

KrillinAI Cover Image loads about 441 tokens when it runs. Until then it costs about 51 tokens; SKILL.md has 169 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~51
When it runs · the whole SKILL.md, loaded when a task matches
~441

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from krillinai/OpenCreator at commit 837dbb4, republished under its Apache-2.0 licence (© krillinai). 169 words, ~441 tokens.

Download SKILL.mdSave it as .claude/skills/krillinai-cover/SKILL.md (or your agent's skills folder).
name
krillinai-cover
description
Use when generating a cover image with the KrillinAI CLI from a complete image prompt, including validating image-provider configuration and inspecting the generated image and saved prompt.

KrillinAI Cover

Use this skill for the implemented cover command. Read skills/krillinai-cli/references/cli-contract.md first for binary location, execution working directory, configuration, and JSON behavior.

Command

bash
(cd "$KRILLINAI_CWD" && "$KRILLINAI_CLI" cover \
  --workdir "$WORKDIR" \
  --prompt "$COVER_PROMPT" \
  --size 1536x1024)

The prompt must already contain the desired title text, language, composition, visual style, and any useful source-video context. The current CLI does not expose a reference-image argument and does not automatically send origin_cover.jpg to the image model.

Inputs

  • --workdir: an existing or new task directory.
  • --prompt: required final prompt sent to the configured image model.
  • --size: optional image size; the default is 1024x1024.
  • [image] configuration in <execution-cwd>/config/config.toml.

Outputs

  • generated_cover.png
  • cover_prompt.final.txt
  • krillinai_manifest.json

Dry Run

cover --dry-run validates the command and writes a manifest, but it does not call the image model or create generated_cover.png.

Verification

  • Require terminal JSON with "ok": true.
  • Read output paths from the terminal response or manifest.
  • Confirm generated_cover.png is non-empty and decodable as an image.
  • Confirm cover_prompt.final.txt exactly records the submitted prompt.
  • If provider configuration is missing or generation fails, report the returned error rather than treating the manifest alone as success.

© krillinai, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/krillinai-cover of krillinai/OpenCreator.

Open the folder on GitHubat commit 837dbb4

Compare with similar skills

KrillinAI Cover Image next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

KrillinAI Cover Image compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
KrillinAI Cover Image this skillkrillinai/OpenCreator13k—~441Automated safety check: PassApache-2.0
Web Asset Generatoralonw0/web-asset-generator5141 repos~6.6kAutomated safety check: PassMIT
SEO Image GeneratorAgriciDaniel/claude-seo19k2 repos~2.1kAutomated safety check: PassMIT
Guizang Material Illustrationop7418/guizang-material-illustration1.2k—~1.6kAutomated safety check: PassNone
Native Transparent ImagegenZSeven-W/craft-skills2251 repos~1.1kAutomated safety check: PassApache-2.0
Banner CreatorReScienceLab/opc-skills1.8k—~1.3kAutomated safety check: PassApache-2.0

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More from krillinai/OpenCreator

All 8 skills in this repo

  • KrillinAI CLI Operator

    krillinai/OpenCreator

    Routes agents to the right KrillinAI command for subtitles, dubbing, video rendering, covers and speech, and explains how to read its JSON and manifest output.

    13k GitHub stars~869 tokensUpdated today
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  • KrillinAI Pipeline Planner

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    Validates a KrillinAI multi-stage output plan with the pipeline command's dry run, then maps it to the individual stage commands that do the real work.

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  • KrillinAI Render Vertical

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    Renders a source video as a portrait video with the KrillinAI CLI, with short bilingual subtitles or a dubbed audio track, then checks the result.

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  • KrillinAI Subtitle Generator

    krillinai/OpenCreator

    Generates subtitles with the KrillinAI CLI from a YouTube link, Bilibili link or local video, with platform captions, Whisper fallback, translation and bilingual SRT output.

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  • KrillinAI Dubbing

    krillinai/OpenCreator

    Generates target-language dubbing audio from an SRT subtitle file with the KrillinAI CLI, and optionally a dubbed video.

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  • KrillinAI Horizontal Video Renderer

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    Renders landscape videos with the KrillinAI CLI, either the original footage with bilingual subtitles or a dubbed video with target-language subtitles.

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Categories

Questions about KrillinAI Cover Image

What does KrillinAI Cover Image do?

Generates a cover image with the KrillinAI CLI from a finished image prompt, then checks the output files, the saved prompt and the manifest. The skill wraps the cover command of the KrillinAI CLI.jpg to the image model.

When should I use KrillinAI Cover Image?

KrillinAI Cover Image fits situations like: creating a cover image for a video from a fully written prompt; checking an image-provider setup with a dry run before generating anything; verifying that a generated cover and its saved prompt match.

How do I install KrillinAI Cover Image in Claude Code?

Run `npx skills add krillinai/OpenCreator --skill krillinai-cover -a claude-code`. Or copy the skill folder (skills/krillinai-cover in krillinai/OpenCreator) into .claude/skills/krillinai-cover in your project. Claude Code loads it when a task matches its description.

How do I install KrillinAI Cover Image in Codex?

Run `npx skills add krillinai/OpenCreator --skill krillinai-cover -a codex`. Or copy the skill folder (skills/krillinai-cover in krillinai/OpenCreator) into .agents/skills/krillinai-cover in your project. Codex loads it when a task matches its description.

Can I use KrillinAI Cover Image in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add krillinai/OpenCreator --skill krillinai-cover -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/krillinai-cover, .gemini/skills/krillinai-cover, .github/skills/krillinai-cover and .opencode/skills/krillinai-cover in your project.

What does KrillinAI Cover Image need to run?

SKILL.md names no scripts, command-line tools or credentials: KrillinAI Cover Image is instructions for the agent only. Our summary lists: The KrillinAI CLI; An image provider configured in config/config.toml.

Does KrillinAI Cover Image access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is KrillinAI Cover Image safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does KrillinAI Cover Image use?

KrillinAI Cover Image is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does KrillinAI Cover Image use?

About 441 tokens (SKILL.md is roughly 1.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to KrillinAI Cover Image?

Skills that share tags, products or a category with KrillinAI Cover Image: Web Asset Generator (alonw0/web-asset-generator, 514 stars), SEO Image Generator (AgriciDaniel/claude-seo, 19k stars), Guizang Material Illustration (op7418/guizang-material-illustration, 1.2k stars) and Native Transparent Imagegen (ZSeven-W/craft-skills, 225 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains KrillinAI Cover Image?

krillinai (a GitHub user) maintains it in krillinai/OpenCreator, which has 12,682 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 11, 2026.

Source: krillinai/OpenCreator on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.