HOST=0.0.0.0
PORT=8080
UPSTREAM_URL=http://127.0.0.1:3000/v1/chat/completions
# Optional. If omitted, the incoming Authorization header is forwarded upstream.
# UPSTREAM_AUTH_HEADER=Bearer your-upstream-token

DEFAULT_PUBLIC_MODEL=gpt-image-2
MODEL_MAP_JSON={"gpt-image-2":"gpt-draw-1024x1024","gpt-image-2-1024x1024":"gpt-draw-1024x1024","gpt-image-2-1024x1536":"gpt-draw-1024x1536","gpt-image-2-1536x1024":"gpt-draw-1536x1024"}
SIZE_MAP_JSON={"1024x1024":"gpt-draw-1024x1024","1024x1536":"gpt-draw-1024x1536","1536x1024":"gpt-draw-1536x1024"}
ALLOW_UNMAPPED_MODEL_PASSTHROUGH=false

PERSIST_IMAGES=true
OUTPUT_DIR=./data/generated
FILE_URL_PATH=/generated
# PUBLIC_BASE_URL=https://api.example.com

DEFAULT_RESPONSE_FORMAT=b64_json
ALWAYS_INCLUDE_B64_JSON=false
ALWAYS_INCLUDE_URL=true
FORWARD_USER_FIELD=true

# Optional experimental async placeholder mode. Only model names ending with this
# suffix return a placeholder URL immediately and finish rendering in the background.
# Example: gpt-image-2-async -> async placeholder, gpt-image-2 -> normal sync mode.
# ASYNC_PLACEHOLDER_MODEL_SUFFIX=-async

# Optional experimental heartbeat mode. Only model names ending with this suffix
# use chunked keepalive whitespace while waiting for the final JSON response.
# Example: gpt-image-2-hb -> heartbeat mode, gpt-image-2 -> normal sync mode.
# HEARTBEAT_MODEL_SUFFIX=-hb
# HEARTBEAT_INTERVAL_SECONDS=15

# Optional prompt shaping.
# SYSTEM_PROMPT=You are a safe image generation relay.
# PROMPT_PREFIX=Generate a polished marketing image:
# PROMPT_SUFFIX=Return a single image.

# Optional JSON merged into every upstream request.
UPSTREAM_EXTRA_BODY_JSON={}

# Optional file cleanup.
CLEANUP_MAX_AGE_SECONDS=0
CLEANUP_SWEEP_INTERVAL_SECONDS=3600