nano-banana-pro-openrouter SKILL.md skillA
nano-banana-pro-openrouter from marielynneblock/arcanum-artifex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add marielynneblock/arcanum-artifex/nano-banana-pro-openrouter@git:20260710.0115f49Pins git:20260710.0115f49 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- marielynneblock/arcanum-artifex
- Path
skills/agentic/nano-banana-pro-openrouter/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260710.0115f49, committed Jul 10, 2026
- First version recorded
- Jun 24, 2026
- Size
- 2,797 bytes
- Repository stars
- 4
- License
- none declared
Generate or edit images via OpenRouter with the Gemini 3 Pro Image model. Use for prompt-only image generation, image edits, and multi-image compositing; supports 1K/2K/4K output.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Nano Banana Pro OpenRouter ## Overview Generate or edit images with OpenRouter using the `google/gemini-3-pro-image-preview` model. Support prompt-only generation, single-image edits, and multi-image composition. Run commands from this skill folder so bundled scripts and assets resolve correctly. ### Prompt-only generation ``` uv run scripts/generate_image.py \ --prompt "A cinematic sunset over snow-capped mountains" \ --filename sunset.png ``` ### Edit a single image ``` uv run scripts/generate_image.py \ --prompt "Replace the sky with a dramatic aurora" \ --input-image input.jpg \ --filename aurora.png ``` ### Compose multiple images ``` uv run scripts/generate_image.py \ --prompt "Combine the subjects into a single studio portrait" \ --input-image face1.jpg \ --input-image face2.jpg \ --filename composite.png ``` ## Resolution - Use `--resolution` with `1K`, `2K`, or `4K`. - Default is `1K` if not specified. ## System prompt customisation The skill reads an optional system prompt from `assets/SYSTEM_TEMPLATE`. This allows you to customise the image generation behaviour without modifying code. ## Behaviour and constraints …
Read the whole file at its exact version.
How to install
mdr add marielynneblock/arcanum-artifex/nano-banana-pro-openrouter@sha256:9f6defb0c5264a6eThe line at the top of this page pins the label git:20260710.0115f49, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_pkmqvut3zk3gnefb)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 24, 2026 and Jul 10, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260710.0115f49 latest | 2026-07-10 | 0115f49 | 2,797 B | A | view · diff |
| git:20260624.0a2f9fa | 2026-06-24 | 0a2f9fa | 2,795 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2797 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
marielynneblock/arcanum-artifex · 4 stars · license none declared · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pkmqvut3zk3gnefb GET https://markdownregistry.com/api/v1/resolve?ref=marielynneblock/arcanum-artifex/nano-banana-pro-openrouter GET https://markdownregistry.com/api/v1/blob/9f6defb0c5264a6ee0d5299eca930a3703d3a95d676dcb59362b582230b2ad87
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.