feature: Ability to pass credentials without storing in environment file #318

  "provider": {
    "litellm": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://my.companies.litellm.endpoint",
        "apiKey": "$(pass litellm)"
      },
      "models": {
        "gemini-2.5-pro": {},
        "gemini-2.5-flash": {},
        "claude-4.0-sonnet": {},
        "claude-4.0-opus": {},
        "o4-mini-high": {},
        "o4-mini": {}
      }
    }
  },
"mcp": {
    "spanner-server": {
      "type": "local",
      "command": ["node", "/location/spanner-server/build/index.js"],
      "env": {
        "GOOGLE_CLOUD_PROJECT": "$GOOGLE_CLOUD_PROJECT",
        "SPANNER_INSTANCE": "$MCP_SPANNER_INSTANCE",
        "SPANNER_DATABASE": "$MCP_SPANNER_DATABASE",
        "GOOGLE_APPLICATION_CREDENTIALS": "$(pass google/spanner/mcp)"
      }
    }
}