Supported file types for Build Agent

  • Release version: Australia
  • Updated June 4, 2026
  • 1 minute to read

    • Build Agent accepts images, documents, code files, and file types specific to ServiceNow as uploads. Supported formats, size limits, and general guidelines apply when generating apps and metadata.

    Table 1. Supported file types
    Category Extensions
    Code and scripts .js, .ts, .tsx, .jsx, .py, .java, .css, .html, .xml, .json
    Documents .txt, .md, .csv, .log
    Images .png, .jpg, .jpeg, .gif, .svg, .webp
    Specific to ServiceNow .now.ts (Fluent DSL), .xml (update sets)

    You can also use MCP server connections, such as for Figma, to provide context for Build Agent. For more information, see MCP connections and Build Agent.

    Note:
    You must be on Australia Patch 3 or higher to upload any file types besides images.

    Size limits

    Table 2. Size limits
    Category Description
    Individual file Up to 10 MB per attachment.
    Images View and analyze screenshots and diagrams directly in the chat.

    File upload guidelines

    • Upload text-based files to let Build Agent read and analyze the full content, then incorporate it into your app.
    • Upload images or screenshots to provide UI mockups, error screenshots, or architecture diagrams as context for development.
    • If an attachment is not visible after a window reload, re-upload the file.

    File uploads and your project

    Uploaded files are available only within the current conversation and aren't added to your ServiceNow project or application automatically.

    Table 3. Upload scenarios
    Upload What Build Agent can do
    A script file (.js, .ts) Read the file, then write the content into your app using the appropriate source file tool.
    A screenshot of an error Analyze the screenshot and help resolve the issue.
    A CSV or data file Use the data to inform table design or generate test data.
    A mockup or diagram Use the file as a reference to build a UI page.
    An XML update set Analyze the file and recreate the metadata using Fluent APIs.
    Note:
    • Uploading a file does not add it to your app. To incorporate file content into your project, ask Build Agent to do so explicitly, for example, "Add this script to my app as a script include."
    • Uploaded files don't persist across sessions. If the window reloads, re-upload the file for Build Agent to access the content again.