Sn Image Base

sn-image-base

Dependency Installation

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pip install -r requirements.txt

Overview

sn-image-base is the base-layer skill (tier 0) of the SenseNova-Skills project and provides four low-level tools:

• sn-image-generate: image generation (calls text-to-image-no-enhance API)
• sn-image-edit: image editing with SenseNova U1.5 Lite (calls /images/edits)
• sn-image-recognize: image recognition (uses VLM to analyze image content)
• sn-text-optimize: text optimization (uses LLM to process text)

This skill does not perform any input preprocessing and only calls backend services to return results.

Tools List

sn-image-generate

Image generation tool that calls the text-to-image-no-enhance API.

--prompt is required; all other parameters are optional:

SenseNova image requests explicitly send watermark=false by default. Both sensenova-u1-fast and sensenova-u1.5-lite are supported; U1.5 Lite additionally supports native 4K output. This no-watermark feature is currently in free public beta and may become paid.

sn-image-edit

Edits one or more reference images with SenseNova U1.5 Lite through the /images/edits endpoint. Local paths are converted to Data URLs; HTTP(S) URLs and Data URLs are passed through.

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python scripts/sn_agent_runner.py sn-image-edit \
    --prompt "Change the background to a snowy mountain" \
    --images source.png reference.png \
    --save-path edited.png

The edit request uses the official defaults n=1, size=auto, watermark=false, prompt_extend=true, and response_format=url.

sn-image-recognize

Image recognition tool that uses VLM (Vision Language Model) to analyze image content. Supports multiple image inputs.

--images and --user-prompt (or --user-prompt-path) are required. All other parameters use three-level defaults (CLI > env var > built-in default):

Available values for --vlm-type:

• openai-completions: OpenAI-compatible /v1/chat/completions interface
• anthropic-messages: Anthropic Messages /v1/messages interface

sn-text-optimize

Text optimization tool that uses LLM (Language Model) to optimize text content. Does not accept image inputs.

--user-prompt (or --user-prompt-path) is required. All other parameters use three-level defaults (CLI > env var > built-in default):

Available values for --llm-type:

• openai-completions: OpenAI-compatible /v1/chat/completions interface
• anthropic-messages: Anthropic Messages /v1/messages interface

VLM vs LLM

Usage

All tools are called through the unified sn_agent_runner.py entrypoint:

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# Image generation (only prompt required; api-key/base-url have defaults)
python scripts/sn_agent_runner.py sn-image-generate \
    --prompt "..."

# Image generation (override base-url)
python scripts/sn_agent_runner.py sn-image-generate \
    --prompt "..." \
    --base-url "https://custom-endpoint.com/v1"

# Image generation (explicitly override api-key)
python scripts/sn_agent_runner.py sn-image-generate \
    --prompt "..." \
    --api-key "sk-xxx"

# Image recognition (VLM) - minimal call (uses built-in Sensenova defaults)
python scripts/sn_agent_runner.py sn-image-recognize \
    --user-prompt "Describe the image" \
    --images "path/to/image.png"

# Image recognition (VLM) - override to Anthropic Claude API compatible (messages interface)
python scripts/sn_agent_runner.py sn-image-recognize \
    --user-prompt "Describe the image" \
    --images "path/to/image.png" \
    --api-key "sk-ant-xxx" \
    --base-url "https://api.anthropic.com" \
    --model "claude-sonnet-4-6" \
    --vlm-type "anthropic-messages"

# Text optimization (LLM) - minimal call (uses built-in Sensenova defaults)
python scripts/sn_agent_runner.py sn-text-optimize \
    --user-prompt "Optimize the text: ..."

# Text optimization (LLM) - override to Anthropic Claude API compatible (messages interface)
python scripts/sn_agent_runner.py sn-text-optimize \
    --user-prompt "Optimize the text: ..." \
    --api-key "sk-ant-xxx" \
    --base-url "https://api.anthropic.com" \
    --model "claude-sonnet-4-6" \
    --llm-type "anthropic-messages"

Default Parameter Behavior

Authentication parameters for sn-image-generate have the following default behavior:

sn-image-recognize and sn-text-optimize use priority: CLI argument > command-specific env var > shared SN_CHAT_* env var > global SN_* env var > built-in default.

api_key resolution order (high to low): CLI --api-key > command-specific key (SN_VISION_API_KEY/SN_TEXT_API_KEY) > SN_CHAT_API_KEY > SN_API_KEY. If all are unset, MissingApiKeyError is raised.

Only --api-key must be provided via CLI or environment; base URL, model, and interface type have shared chat defaults.

Agent Configuration Integration

The agent can automatically read parameters from openclaw.json without manual input:

Note: --llm-type and --vlm-type share the same providers.<name>.api field and are used by LLM and VLM tools respectively.

Mapping between provider.api and interface type:

Mapping Between base-url and Interface Type

Different API types have different requirements for base-url format:

Note:

• Recommended chat base URLs include the provider API version path, for example /v1.
• For compatibility, if the configured chat base URL has no path, the runner appends /v1/chat/completions or /v1/messages.
• If the configured chat base URL already has a path such as /v1, the runner appends only /chat/completions or /messages.
• Some providers use versioned paths other than /v1, such as Gemini's /v1beta/openai.

Output Format

All tools support two output formats:

• --output-format text (default): outputs plain text result
• --output-format json: outputs JSON, including status and elapsed_seconds (runtime in seconds, rounded to 2 decimals)

JSON output for sn-image-recognize and sn-text-optimize also includes model, base_url, and interface_type to verify the effective runtime configuration:

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{
  "status": "ok",
  "result": "...",
  "model": "sensenova-6.8-flash-lite",
  "base_url": "https://token.sensenova.cn/v1",
  "interface_type": "openai-completions",
  "elapsed_seconds": 1.23
}

On failure:

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{
  "status": "failed",
  "error": "error message",
  "elapsed_seconds": 0.05
}

Input/Output Specification

See references/api_spec.md for details.