Agent skill

Screenshot Annotator

by minicoohei in minicoohei/ai-agent-camp

スクリーンショットに赤枠・矢印・吹き出し等の注釈を自動追加するスキル. An agent skill from minicoohei/ai-agent-camp.

No licenceAuto-check passed

Install Screenshot Annotator

skills CLI
$ npx skills add minicoohei/ai-agent-camp --skill screenshot-annotator -a claude-code

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

GitHub CLI
$ gh skill install minicoohei/ai-agent-camp screenshot-annotator --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/minicoohei/ai-agent-camp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/screenshot-annotator .claude/skills/screenshot-annotator && 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
screenshot-annotator
GitHub stars
347
Token cost
~550 tokens
SKILL.md length
149 words
Files
5 (incl. scripts)
Skills in repo
37
Repo updated
First seen
Licence
None found

At a glance

スクリーンショットに赤枠・矢印・吹き出し等の注釈を自動追加するスキル. An agent skill from minicoohei/ai-agent-camp.

  • Works in 3 steps: Analyze the screenshot to identify the… → Generate annotation overlay using Gemini… → Output annotated image as a separate file
  • SKILL.md covers Workflow, Usage, Parameters and Styles, plus 5 more sections
  • Runs Python scripts from its folder; calls python; needs GEMINI_API_KEY and GOOGLE_API_KEY

What it does

Screenshot Annotator is an agent skill from minicoohei/ai-agent-camp. スクリーンショットに赤枠・矢印・吹き出し等の注釈を自動追加するスキル。 「スクショに注釈を付けて」「画面に矢印を追加」「マニュアル用の注釈」等のリクエストで発動。

Its SKILL.md is about 550 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including scripts (for example `SKILL.en.md`, `SKILL.es.md` and `agents/openai.yaml`).

The repository describes itself as: AI Agent Camp — non-engineer-friendly AI agent training curriculum. Lessons, skills, commands, and hooks for Claude Code, Cursor, and Codex.

Example prompts

  • “/screenshot-annotator”

Requirements

  • Python 3
  • A credential in GEMINI_API_KEY
  • A credential in GOOGLE_API_KEY

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Analyze the screenshot to identify the target element
  2. Generate annotation overlay using Gemini Vision API
  3. Output annotated image as a separate file

What it can do on your machine

Read from SKILL.md and the folder at commit 048ba4c. 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

    Ships 1 file in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python

    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 these keys or tokens, usually read from environment variables:

    • GEMINI_API_KEY
    • GOOGLE_API_KEY

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

Context cost

Screenshot Annotator loads about 550 tokens when it runs. Until then it costs about 26 tokens; SKILL.md has 149 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~26
When it runs · the whole SKILL.md, loaded when a task matches
~550

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); the scripts in this folder are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 149 words (~550 tokens).

“Add annotations to screenshots without modifying the original image. Annotations are overlaid on top.”

— opening of SKILL.md by minicoohei
name
screenshot-annotator
triggers
スクショに注釈を付けて, 画面に矢印を追加, マニュアル用の注釈, 赤枠を付けて, 吹き出しを追加, screenshot-annotator, annotate screenshot

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files (scripts) in skills/screenshot-annotator of minicoohei/ai-agent-camp.

  • SKILL.md
  • SKILL.en.md
  • SKILL.es.md
  • agents/openai.yaml
  • scripts/annotate.py

Open the folder on GitHubat commit 048ba4c

Compare with similar skills

Screenshot Annotator 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.

Screenshot Annotator compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Screenshot Annotator this skillminicoohei/ai-agent-camp347—~550Automated safety check: PassNone
Screenshotnexu-io/open-design100k—~291Automated safety check: PassApache-2.0
Wireframe Annotatednexu-io/open-design100k—~960Automated safety check: PassApache-2.0
Tabler Screenshot Makertabler/tabler42k—~1.3kAutomated safety check: PassMIT
PR Screenshotsgithub/awesome-copilot40k—~1.2kAutomated safety check: PassMIT
Image Annotationsgithub/awesome-copilot40k—~6kAutomated safety check: PassMIT

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Questions about Screenshot Annotator

What does Screenshot Annotator do?

スクリーンショットに赤枠・矢印・吹き出し等の注釈を自動追加するスキル. An agent skill from minicoohei/ai-agent-camp. Screenshot Annotator is an agent skill from minicoohei/ai-agent-camp.

How do I install Screenshot Annotator in Claude Code?

Run `npx skills add minicoohei/ai-agent-camp --skill screenshot-annotator -a claude-code`. Or copy the skill folder (skills/screenshot-annotator in minicoohei/ai-agent-camp) into .claude/skills/screenshot-annotator in your project. Claude Code loads it when a task matches its description.

How do I install Screenshot Annotator in Codex?

Run `npx skills add minicoohei/ai-agent-camp --skill screenshot-annotator -a codex`. Or copy the skill folder (skills/screenshot-annotator in minicoohei/ai-agent-camp) into .agents/skills/screenshot-annotator in your project. Codex loads it when a task matches its description.

Can I use Screenshot Annotator 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 minicoohei/ai-agent-camp --skill screenshot-annotator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/screenshot-annotator, .gemini/skills/screenshot-annotator, .github/skills/screenshot-annotator and .opencode/skills/screenshot-annotator in your project.

What does Screenshot Annotator need to run?

Going by SKILL.md and its folder, Screenshot Annotator needs Python for the scripts in its folder, the command-line tools its instructions call (python) and credentials named GEMINI_API_KEY and GOOGLE_API_KEY. Our summary lists: Python 3; A credential in GEMINI_API_KEY; A credential in GOOGLE_API_KEY.

Does Screenshot Annotator 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 Screenshot Annotator 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Screenshot Annotator use?

No licence was found for Screenshot Annotator or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Screenshot Annotator use?

About 550 tokens (SKILL.md is roughly 2.2k 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 Screenshot Annotator?

Skills that share tags, products or a category with Screenshot Annotator: Screenshot (nexu-io/open-design, 100k stars), Wireframe Annotated (nexu-io/open-design, 100k stars), Tabler Screenshot Maker (tabler/tabler, 42k stars) and PR Screenshots (github/awesome-copilot, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Screenshot Annotator?

minicoohei (a GitHub user) maintains it in minicoohei/ai-agent-camp, which has 347 GitHub stars. The repository holds 37 skills in this directory. The repository was last updated on October 7, 2026.

Source: minicoohei/ai-agent-camp on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.