Generate Logo

Generate logo variations for vigiles using the ImageRouter API (imagerouter.io).

Setup

Get an API key from https://imagerouter.io/api-keys. Pass it as an argument or set IMAGEROUTER_API_KEY env var. Do NOT commit the key.

API

Endpoint: https://api.imagerouter.io/v1/openai/images/generations
Auth: Bearer token in Authorization header
Method: POST, Content-Type: application/json

Request body

{
  "prompt": "...",
  "model": "google/nano-banana-2",
  "quality": "high",
  "size": "1024x1024",
  "response_format": "url",
  "output_format": "png"
}

Available models (image generation)

List models: GET https://api.imagerouter.io/v1/models

Known good models:

google/nano-banana-2 — best quality, $0.07/image
google/nano-banana-2:free — free tier
openai/gpt-image-1 — OpenAI's image model
black-forest-labs/FLUX-1.1-pro — FLUX pro

Response

{
  "created": 1775430873,
  "data": [{ "url": "https://storage.imagerouter.io/..." }],
  "cost": 0.069,
  "latency": 27627
}

Download the image from the URL in data[0].url.

Current logo

The current logo (logo.png) is v6: overlapping translucent flame petals on dark background, amber-orange palette. Generated with google/nano-banana-2.

Prompt that produced it

A premium, refined logo icon for a developer tool called vigiles that compiles
typed TypeScript specs to AI instruction files. Inspired by OpenAI geometric aesthetic and Apple
minimalism. A single abstract geometric shape: an upward-pointing flame composed
of 3 overlapping translucent rounded shapes, creating depth through overlap —
similar to how the OpenAI logo uses overlapping curves. Warm amber to deep orange
color palette. Black background. No text. No letters. Pure abstract mark. Clean
enough to be an app icon. Luxurious, premium, modern tech company feel.

Design principles

Flame/torch motif — vigiles were Rome's night watchmen who carried torches
Amber/orange palette — matches GitHub Action branding color
No text in the icon — must work at 16px favicon size
Dark background variant for README, light/transparent variant for npm

Example curl

curl 'https://api.imagerouter.io/v1/openai/images/generations' \
  -H "Authorization: Bearer $IMAGEROUTER_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "prompt": "YOUR PROMPT HERE",
    "model": "google/nano-banana-2",
    "quality": "high",
    "size": "1024x1024",
    "response_format": "url",
    "output_format": "png"
  }'

Workflow

Generate variations with different prompts
Save as logo-v*.png (gitignored)
Pick the best, copy to logo.png
Commit logo.png only

generate-logo