What is image-generation?

An image-making tool that turns text descriptions into PNG or other image files, and can also transform one or more supplied images.

Use it to create illustrations from prompts, or restyle sketches and reference images with a chosen aspect ratio and size.

It removes the need to create every visual manually or switch to a separate image editor. It requires a Google Gemini API key.

image-generation — Skill for Claude Code and Codex by SawyerHood

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 SawyerHood/middleman --skill image-generation

Clone the repo

git clone --depth 1 https://github.com/SawyerHood/middleman

Made for: Claude Code, Codex.

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/sawyerhood/middleman/image-generation/github.svg)](https://agentmods.dev/skills/sawyerhood/middleman/image-generation)

Your own site

<a href="https://agentmods.dev/skills/sawyerhood/middleman/image-generation"><img src="https://agentmods.dev/badge/skills/sawyerhood/middleman/image-generation/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/sawyerhood/middleman/image-generation"><img src="https://agentmods.dev/badge/skills/sawyerhood/middleman/image-generation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 357 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	$0.00023	$0.00357
Opus 5.5	$0.00009	$0.00143
Sonnet 5.5	$0.00005	$0.00071
Haiku 4.5	$0.00002	$0.00036

Measured 2mo ago against content hash 5880026e61c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

image-generation 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (generate.d.ts, generate.js), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

apps/backend/src/swarm/skills/builtins/image-generation/SKILL.md · 46 lines

What it actually says

Image Generation

Generate images using Google Gemini (gemini-3-pro-image-preview) for both text-to-image and image-to-image workflows.

Use the packaged CLI:

middleman image generate \
  --prompt "a cute robot bee in a garden" \
  --output "/path/to/output.png"

Image-to-image generation is supported with repeated --input-image flags:

middleman image generate \
  --prompt "turn this sketch into a painted poster with a limited teal and coral palette" \
  --input-image "/path/to/sketch.png" \
  --input-image "/path/to/reference.jpg" \
  --output "/path/to/output.png"

Options

--prompt (required): text description of the image to generate
--output (required): output file path (extension auto-detected when omitted)
--input-image (optional, repeatable): local source image(s) to send alongside the prompt
--aspect-ratio (optional): aspect ratio like 16:9, 1:1, 4:3
--size (optional): image size, default 1K

Output

The script prints JSON:

Success: { "ok": true, "file": "/path/to/output.png", "mimeType": "image/png" }
Failure: { "ok": false, "error": "..." }

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

2mo ago First seen · 46 lines · 23 tokens per session scan A 5880026e61c3

Subscribe to this mod's changes

image-generation is a skill published in the GitHub repository SawyerHood/middleman (185 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 23 tokens to every session and 357 once invoked, about $0.0001 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 2026-08-30.

Claude Code Creative and media agents ai-agents

image-generation next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
image-generationSawyerHood/middleman	Skill	185	5mo ago	Apache-2.0	A	23	Claude Code, Codex
foundry-config-setupmicrosoft/agent-framework	Skill	15k	yesterday	MIT	A	65	Claude Code, Codex
rowboat-spacesrowboatlabs/rowboat	Skill	18k	yesterday	Apache-2.0	A	60	Claude Code, Codex
create-tech-designhumanlayer/humanlayer	Skill	13k	yesterday	Apache-2.0	A	16	Claude Code, Codex
deploy-docker-composeomnigent-ai/omnigent	Skill	11k	yesterday	Apache-2.0	A	84	Claude Code, Codex
haikuagno-agi/agno	Skill	43k	yesterday	Apache-2.0	A	0	Claude Code, Codex
azure-mgmt-botservice-dotnetmicrosoft/skills	Skill	3.2k	yesterday	MIT	A	78	Claude Code