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.
npx agentmods add skills/jerseycheese/agent-skills/github-screenshotnpx skills add jerseycheese/agent-skills --skill github-screenshotgit clone --depth 1 https://github.com/jerseycheese/agent-skillsWrote 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.
[](https://agentmods.dev/skills/jerseycheese/agent-skills/github-screenshot)<a href="https://agentmods.dev/skills/jerseycheese/agent-skills/github-screenshot"><img src="https://agentmods.dev/badge/skills/jerseycheese/agent-skills/github-screenshot.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00082 | $0.01276 |
| Opus 5 | $0.00041 | $0.00638 |
| Sonnet 5 | $0.00016 | $0.00255 |
| Haiku 4.5 | $0.00008 | $0.00128 |
Grade A, and why
github-screenshot 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Screenshot Helper
When to Use This Skill
Use this skill when:
- Adding screenshots to PR descriptions
- Including images in GitHub issues
- Documenting features with screenshots
- Creating visual documentation in markdown
Setup
This skill wraps a local generate-github-image-markdown.sh script. Update the path below to match your own installation before using.
Directory convention
When the image is being committed purely so it can render in an issue/PR body (not an existing app asset the user is pointing you at), commit it under a top-level github-screenshots/<topic-or-issue>/ directory — e.g. github-screenshots/hover-text-invisible/before-hover.png. The name says what these files are for: throwaway evidence for a GitHub body, not app screenshots or fixtures, so they're easy to find and prune later without touching anything else in the repo. Don't reuse a generic screenshots/ dir for this — that name doesn't self-document, and it collides with whatever ad-hoc convention a given repo might already have for actual app screenshots.
If the target repo already has an established convention for this (check with the user or look for precedent — e.g. git log --diff-filter=A --name-only --all | grep -iE 'screenshot'), follow that instead of introducing a second one.
What This Skill Does
Runs your generate-github-image-markdown.sh script to:
- Generate proper raw.githubusercontent.com URLs
- Create markdown with alt text and captions
- Handle git repository detection automatically
- Include helpful comments with local paths
Usage Flow
Step 1: Gather Information
Ask the user for:
- Image path (required) - relative or absolute
- Alt text (optional) - defaults to "Screenshot"
- Caption (optional) - italicized description below image
Step 2: Run the Script
Execute:
~/tools/screenshots/generate-github-image-markdown.sh \
"$IMAGE_PATH" \
"$ALT_TEXT" \
"$CAPTION"
Permission pattern needed (update path to match your setup):
Bash(~/tools/screenshots/generate-github-image-markdown.sh:*)
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.
- 4d ago First seen · 190 lines · 82 tokens per session scan A 3e58ae619bfc
github-screenshot is a skill published in the GitHub repository jerseycheese/agent-skills (1 stars, last pushed 2d ago), licensed MIT. It adds 82 tokens to every session and 1,276 once invoked, about $0.0004 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 2026-08-31.
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