FUSION_MAIN_MODEL=openai/gpt-5.6-sol
FUSION_SIDEKICK_MODEL=openai/gpt-5.6-luna
FUSION_FALLBACK_MODEL=anthropic/claude-sonnet-4.6
FUSION_WORKSPACE=.

# AI SDK Gateway: set one authentication method.
AI_GATEWAY_API_KEY=
VERCEL_OIDC_TOKEN=

# Enables Search, Fetch, browser Agent, and computer-use tools.
BROWSERBASE_API_KEY=

# Required by the web app's Modal execution environment.
MODAL_TOKEN_ID=
MODAL_TOKEN_SECRET=
MODAL_APP_NAME=fusion
MODAL_SANDBOX_IMAGE=node:22-bookworm
MODAL_SANDBOX_TIMEOUT_MS=1800000