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Agent skill

Screenshot

by n0an in n0an/VivaDicta

Capture screenshots from iOS Simulator using native xcrun simctl command for documentation, debugging, and visual verification.

MITAuto-check passedMobile

Install Screenshot

skills CLI
$ npx skills add n0an/VivaDicta --skill screenshot -a claude-code

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

GitHub CLI
$ gh skill install n0an/VivaDicta screenshot --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/n0an/VivaDicta.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/screenshot .claude/skills/screenshot && 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
GitHub stars
131
Token cost
~657 tokens
SKILL.md length
243 words
Files
3 (incl. references)
Skills in repo
20
Repo updated
First seen
Licence
MIT

At a glance

Capture screenshots from iOS Simulator using native xcrun simctl command for documentation, debugging, and visual verification.

  • Works in 4 steps: Create screenshots directory if needed → Capture the screenshot → Handle the optional argument → …
  • Mobile work in your project
  • SKILL.md covers Task, Instructions, Example Usage and Advanced Options, plus 2 more sections
  • Calls xcrun

What it does

Screenshot is an agent skill from n0an/VivaDicta. Capture screenshots from iOS Simulator using native xcrun simctl command for documentation, debugging, and visual verification. Optionally analyze the screenshot.

Its SKILL.md is about 660 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `agents/openai.yaml` and `references/advanced.md`).

It sits in Mobile. It works with iOS. The repository describes itself as: iOS & watchOS speech-to-text app with AI voice keyboard, on-device RAG, and chat with your notes - powered by Apple Foundation Models, WhisperKit, NVIDIA Parakeet, and 20+ AI…. The licence is MIT.

When your agent uses it

  • Mobile work in your project

Example prompts

  • “/screenshot”

Workflow steps

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

  1. Create screenshots directory if needed
  2. Capture the screenshot
  3. Handle the optional argument
  4. Report results: Always mention the saved screenshot path. If analyzed, provide findings.

What it can do on your machine

Read from SKILL.md and the folder at commit b141304. 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

    Shell commands in SKILL.md call:

    • xcrun

    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

Screenshot loads about 657 tokens when it runs, and up to ~1.2k if it reads all its reference files. Until then it costs about 43 tokens; SKILL.md has 243 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~43
When it runs · the whole SKILL.md, loaded when a task matches
~657
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.2k

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 n0an/VivaDicta at commit b141304, republished under its MIT licence (© n0an). 243 words, ~657 tokens.

Download SKILL.mdSave it as .claude/skills/screenshot/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
screenshot
description
Capture screenshots from iOS Simulator using native xcrun simctl command for documentation, debugging, and visual verification. Optionally analyze the screenshot.
disable-model-invocation
true

screenshot

You are given the following context: $ARGUMENTS

Task

Capture a screenshot of the iOS Simulator using xcrun simctl and optionally analyze it based on user instructions.

Instructions

  1. Create screenshots directory if needed:

    bash
    mkdir -p llmtemp/screenshots

  2. Capture the screenshot:

    bash
    TIMESTAMP=$(date +%Y%m%d_%H%M%S)
xcrun simctl io booted screenshot llmtemp/screenshots/screenshot_${TIMESTAMP}.png

  3. Handle the optional argument:

    • If $ARGUMENTS is empty or not provided: Capture and save, then report the saved path
    • If $ARGUMENTS is provided: After saving, read the screenshot and follow the requested instruction

    Common argument patterns:

    • "take a look" / "analyze" / "what's on screen" - Read and describe what's visible
    • "check for [element]" - Look for specific UI elements
    • "is there [something]" - Verify presence of specific content
    • "extract text" - Extract and list all visible text
    • Any other instruction - Follow it after reading the screenshot

  4. Report results: Always mention the saved screenshot path. If analyzed, provide findings.

Example Usage

bash
screenshot                              # Simple capture
screenshot take a look                  # Capture and analyze
screenshot is there a login button?     # Check for specific element
screenshot extract all visible text     # Extract text

Advanced Options

For advanced use cases, load references/advanced.md.

  • Specific simulator: Use UDID instead of booted when multiple simulators are running
  • Image format: --type=png (default), --type=tiff
  • Specific display: --display=1 (main), --display=2 (secondary, e.g. Apple Watch)
  • Mask sensitive data: --mask=black (iOS 15+)

Troubleshooting

  • "No such device: booted": No simulator running. Check with xcrun simctl list devices | grep Booted
  • Blank/black screenshot: Wait for content to load, ensure simulator is not minimized
  • Wrong simulator captured: Use specific UDID instead of booted

Technical Notes

  • Screenshots saved to llmtemp/screenshots (gitignored)
  • Filenames include timestamps to prevent overwrites
  • Native xcrun simctl command - no external dependencies, only Xcode
  • Captures clean framebuffer without simulator bezel
  • PNG format (lossless)

© n0an, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in .agents/skills/screenshot of n0an/VivaDicta.

  • SKILL.md
  • agents/openai.yaml
  • references/advanced.md

Open the folder on GitHubat commit b141304

Compare with similar skills

Screenshot 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 compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Screenshot this skilln0an/VivaDicta131—~657Automated safety check: PassMIT
Apple Crash Log .NET Symbolicationdotnet/skills5.6k1 repos~2.4kAutomated safety check: PassMIT
iOS Memgraph Analysisdpearson2699/swift-ios-skills1.2k—~2.4kAutomated safety check: PassCustom licence
Community Migrationjingjing2222/react-native-nitro-geolocation115—~3.5kAutomated safety check: PassMIT
Audit Build Warningsbitwarden/ios696—~1.9kAutomated safety check: PassGPL-3.0
Diagnosing Stacktrace SymbolicationPostHog/posthog40k—~2.2kAutomated safety check: PassCustom licence

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More from n0an/VivaDicta

All 20 skills in this repo

  • Swiftdata Pro

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    Writes, reviews, and improves SwiftData code using modern APIs and best practices.

    131 GitHub starsUsed in 1 repo~930 tokens
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  • iOS Simulator Skill

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    21 production-ready scripts for iOS app testing, building, and automation.

    131 GitHub starsUsed in 1 repo~2.5k tokens
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  • Asc Metadata Sync

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    Sync and validate App Store metadata and localizations with asc, including legacy metadata format migration.

    131 GitHub starsUsed in 1 repo~1k tokens
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  • Asc Aso Rankings

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    Pull current keyword rankings from Astro MCP, compare against the previous rankings check, and save a new rankings file to the vault.

    131 GitHub stars~985 tokensUpdated 4 days ago
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  • Coverage Report

    n0an/VivaDicta

    Measure VivaDicta test code coverage from the terminal. An agent skill from n0an/VivaDicta.

    131 GitHub stars~1.2k tokensUpdated 4 days ago
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  • Loc Report

    n0an/VivaDicta

    Count Swift lines of code across the VivaDicta codebase and refresh the production-vs-test history chart.

    131 GitHub stars~825 tokensUpdated 4 days ago
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Works with

Categories

Questions about Screenshot

What does Screenshot do?

Capture screenshots from iOS Simulator using native xcrun simctl command for documentation, debugging, and visual verification. Screenshot is an agent skill from n0an/VivaDicta. Capture screenshots from iOS Simulator using native xcrun simctl command for documentation, debugging, and visual verification.

When should I use Screenshot?

Screenshot fits situations like: mobile work in your project.

How do I install Screenshot in Claude Code?

Run `npx skills add n0an/VivaDicta --skill screenshot -a claude-code`. Or copy the skill folder (.agents/skills/screenshot in n0an/VivaDicta) into .claude/skills/screenshot in your project. Claude Code loads it when a task matches its description.

How do I install Screenshot in Codex?

Run `npx skills add n0an/VivaDicta --skill screenshot -a codex`. Or copy the skill folder (.agents/skills/screenshot in n0an/VivaDicta) into .agents/skills/screenshot in your project. Codex loads it when a task matches its description.

Can I use Screenshot 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 n0an/VivaDicta --skill screenshot -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, .gemini/skills/screenshot, .github/skills/screenshot and .opencode/skills/screenshot in your project.

What does Screenshot need to run?

Going by SKILL.md and its folder, Screenshot needs the command-line tools its instructions call (xcrun).

Does Screenshot 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 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 Screenshot use?

Screenshot is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Screenshot use?

About 657 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 500 tokens, read only when the agent opens those files.

What are the alternatives to Screenshot?

Skills that share tags, products or a category with Screenshot: Apple Crash Log .NET Symbolication (dotnet/skills, 5.6k stars), iOS Memgraph Analysis (dpearson2699/swift-ios-skills, 1.2k stars), Community Migration (jingjing2222/react-native-nitro-geolocation, 115 stars) and Audit Build Warnings (bitwarden/ios, 696 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Screenshot?

n0an (a GitHub user) maintains it in n0an/VivaDicta, which has 131 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on October 5, 2026.

Source: n0an/VivaDicta on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.