Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub ยท Content Creation
Nano Banana Pro OpenRouter
Generate images with Nano Banana Pro via OpenRouter. Use when the user asks for image generation, mentions Nano Banana Pro, Gemini 3 Pro Image, or OpenRouter image generation.
skill openclawclawhub Free
Generate images with Nano Banana Pro via OpenRouter. Use when the user asks for image generation, mentions Nano Banana Pro, Gemini 3 Pro Image, or OpenRouter image generation.
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Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md, scripts/generate_image.sh
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.1
Provenance
- Publisher
- DuffyCoder
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
Nano Banana Pro Image Generation
Generate new images using OpenRouter's Nano Banana Pro (Gemini 3 Pro Image Preview).
Usage
Run the script using an absolute path (do NOT cd to the skill directory first): Generate new image: sh ~/.openclaw/workspace/skills/nano-banana-pro-openrouter/scripts/generate_image.sh --prompt "your image description" [--filename "output-name.png" | --filename auto] [--resolution 1K|2K|4K] [--api-key KEY] Note: the shell version currently supports generation only (no input image editing). Important: Images are always saved under ~/.openclaw/workspace/outputs/nano-banana-pro-openrouter If --filename contains a path, only the basename is used
Default Workflow (draft -> iterate -> final)
Goal: fast iteration without burning time on 4K until the prompt is correct. Draft (1K): quick feedback loop sh ~/.openclaw/workspace/skills/nano-banana-pro-openrouter/scripts/generate_image.sh --prompt "<draft prompt>" --filename auto --resolution 1K Iterate: adjust prompt in small diffs; keep filename new per run Final (4K): only when prompt is locked sh ~/.openclaw/workspace/skills/nano-banana-pro-openrouter/scripts/generate_image.sh --prompt "<final prompt>" --filename auto --resolution 4K
Resolution Options
The Gemini 3 Pro Image API supports three resolutions (uppercase K required): 1K (default) - ~1024px resolution 2K - ~2048px resolution 4K - ~4096px resolution Map user requests to API parameters: No mention of resolution -> 1K "low resolution", "1080", "1080p", "1K" -> 1K "2K", "2048", "normal", "medium resolution" -> 2K "high resolution", "high-res", "hi-res", "4K", "ultra" -> 4K
API Key and Base URL
The script checks for the API key in this order: --api-key argument (use if user provided a key in chat) OPENROUTER_API_KEY environment variable The API base URL must be set via OPENROUTER_BASE_URL. Use the full chat completions endpoint (for OpenRouter: https://openrouter.ai/api/v1/chat/completions). The script also loads .env files automatically (if present): Current working directory .env Skill directory .env Important: If a .env file exists, do not ask the user for the key up front. Just run the script and only ask if it errors with "No API key provided."
OpenClaw Chat Execution Rules
OpenClaw does NOT auto-source the skill .env file If ~/.openclaw/workspace/skills/nano-banana-pro-openrouter/.env exists: Use the read tool to read .env Extract OPENROUTER_API_KEY and OPENROUTER_BASE_URL Always pass the key via --api-key when running the script Only ask the user if .env is missing or the key cannot be read If the user asks for a timestamped filename, prefer --filename auto (do not handwrite dates) If neither is available, the script exits with an error message.
Preflight and Common Failures (fast fixes)
Preflight: command -v sh (must exist) command -v curl (must exist) command -v base64 (must exist) Common failures: Error: No API key provided. -> read .env and retry with --api-key; if still failing, ask the user to set OPENROUTER_API_KEY Error: No API base URL provided. -> ensure OPENROUTER_BASE_URL is set to a full chat completions endpoint Error loading input image: -> wrong path or unreadable file; verify --input-image points to a real image "quota/permission/403" style API errors -> wrong key, no access, or quota exceeded; try a different key/account
Filename Generation
Generate filenames with the pattern: yyyy-mm-dd-hh-mm-ss-name.png Format: {timestamp}-{descriptive-name}.png Timestamp: Current date/time in format yyyy-mm-dd-hh-mm-ss (24-hour format) Name: Descriptive lowercase text with hyphens Keep the descriptive part concise (1-5 words typically) Use context from the user's prompt or conversation If unclear, use image Examples: Prompt "A serene Japanese garden" -> 2025-11-23-14-23-05-japanese-garden.png Prompt "sunset over mountains" -> 2025-11-23-15-30-12-sunset-mountains.png Prompt "create an image of a robot" -> 2025-11-23-16-45-33-robot.png Unclear context -> 2025-11-23-17-12-48-image.png Tip: To avoid incorrect timestamps, pass --filename auto and let the script generate the filename using the system clock.
Image Editing (Not Supported in Shell Version)
The shell script only supports generating new images. Editing an input image is not available in this version.
Prompt Handling
For generation: pass the user's image description as-is to --prompt. Only rework if clearly insufficient.
Prompt Templates (high hit-rate)
Use templates when the user is vague or when edits must be precise. Generation template: "Create an image of: <subject>. Style: <style>. Composition: <camera/shot>. Lighting: <lighting>. Background: <background>. Color palette: <palette>. Avoid: <list>."
Output
Saves PNG to ~/.openclaw/workspace/outputs/nano-banana-pro-openrouter If --filename includes a path, only the basename is used Script outputs the full path to the generated image Script also outputs MEDIA_URL=file:///absolute/path for each image
Show the image in the reply
Use the MEDIA_URL value to attach the image in the model response In OpenClaw, prefer sending a message with mediaUrl set to that file:// URL Also include the file path in text for reference
Examples
Generate new image: sh ~/.openclaw/workspace/skills/nano-banana-pro-openrouter/scripts/generate_image.sh --prompt "A serene Japanese garden with cherry blossoms" --filename auto --resolution 4K
Category context
Writing, remixing, publishing, visual generation, and marketing content production.
Source: Tencent SkillHub
Largest current source with strong distribution and engagement signals.
Package contents
Included in package
1 Docs1 Scripts
- SKILL.md
- scripts/generate_image.sh