What is sg-generate-images?

A slide-visual generation step that creates images from approved descriptions using Gemini Pro.

Use it to create visuals for presentation slides in PNG or JPG format.

It turns written visual ideas into image files after they have been checked for clarity.

sg-generate-images — Skill for Claude Code by davistroy

Install

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.

Any agent

npx skills add davistroy/claude-marketplace --skill sg-generate-images

Clone the repo

git clone --depth 1 https://github.com/davistroy/claude-marketplace

Made for: Claude Code.

Or install slide-gen, the plugin that ships this one along with the rest of its 9 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/davistroy/claude-marketplace/sg-generate-images/github.svg)](https://agentmods.dev/skills/davistroy/claude-marketplace/sg-generate-images)

Your own site

<a href="https://agentmods.dev/skills/davistroy/claude-marketplace/sg-generate-images"><img src="https://agentmods.dev/badge/skills/davistroy/claude-marketplace/sg-generate-images/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/davistroy/claude-marketplace/sg-generate-images"><img src="https://agentmods.dev/badge/skills/davistroy/claude-marketplace/sg-generate-images.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 917 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.

Origin original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00039	$0.00917
Opus 5.5	$0.00016	$0.00367
Sonnet 5.5	$0.00008	$0.00183
Haiku 4.5	$0.00004	$0.00092

Measured 1mo ago against content hash 095dd7928244, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sg-generate-images 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 1mo 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.

plugins/slide-gen/skills/sg-generate-images/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Slide Generator: Generate Images Step

Generate slide visuals using Gemini Pro from the validated graphics descriptions in the presentation. Uses a unified prompt builder and async batch generation for efficiency.

Pre-loaded Context

Working directory: !pwd

Available presentation files: !ls -la *.md 2>/dev/null | grep -i pres || echo "No presentation files found"

Existing images: !ls -la images/ 2>/dev/null || echo "No images directory yet"

Prerequisites

Preflight: sg --version must succeed before proceeding — if sg is missing, stop and tell the user this requires the private davistroy/slide-generator engine (owner-only; see ADR-0008)
slide-generator package installed
GOOGLE_API_KEY set in environment (Gemini Pro access)
A presentation.md file with validated graphics descriptions
Graphics validation should be run first (.graphics_validated marker)

Input Validation

Required:

<presentation.md> - Path to presentation markdown file

Optional:

--resolution <level> - Image resolution: small, medium, high (default: high)
--image-format <fmt> - Output format: png, jpg (default: png)
--skip-existing - Don't regenerate images that already exist

Instructions

Verify prerequisites: Confirm GOOGLE_API_KEY is set and presentation has validated graphics

Run image generation:

sg generate-images presentation.md --resolution high

Monitor progress: Image generation takes time (~5-10s per image)
Verify output: Check that images were created in the images/ directory
Report results: Show count of images generated, any failures

How It Works

The image generation step uses:

Gemini Pro (gemini-3-pro-image-preview): Google's image generation model
Unified prompt builder: prompt_builder.py constructs optimized prompts from descriptions
Async batch generation: Multiple images generated concurrently via asyncio
API key in header: Authentication via header (not query param)
Block reason diagnostics: Clear error messages when generation is blocked

Read the full file on GitHub · 93 lines

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.

1mo ago First seen · 93 lines · 39 tokens per session scan A 095dd7928244

Subscribe to this mod's changes

sg-generate-images is a skill published in the GitHub repository davistroy/claude-marketplace (5 stars, last pushed 19d ago), licensed MIT. It adds 39 tokens to every session and 917 once invoked, about $0.0002 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 2026-09-04.

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