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Saved settings · Controlled example

An InvokeAI record with seed zero

The reader preserves a saved seed of zero and a CFG scale of 4.5 instead of treating zero as a missing value.

By isGenAI · Published

Read saved generation settingsDownload the test files

Is a saved seed of zero a valid value to display?

In this supported InvokeAI record, seed zero is returned as the string "0", alongside 30 steps, the Euler scheduler and CFG scale 4.5. Missing values are not filled from defaults.

How the case was made

We attach a controlled invokeai_metadata JSON record with a known prompt and seed 0. Assertions compare the recovered prompt, format, seed and CFG scale with their expected values.

Code-drawn geometric test image used for the controlled metadata examples
The same code-drawn source picture is used across the fixtures. The saved demonstration prompts do not describe how these pixels were made.

Files and observed output

  • invokeai-record.png · 13,470 bytesSHA-256: f8ed839eb6a2a833548da189fd4499594326376425a7b200692f8064c777af99
Recorded result
{
  "format": "invokeai",
  "prompt": "Controlled example: three folded paper stars",
  "negative_prompt": "text",
  "recorded_model": "demonstration-only",
  "settings": {
    "seed": "0",
    "steps": 30,
    "scheduler": "euler",
    "cfg_scale": 4.5,
    "width": 1024,
    "height": 768
  }
}

Observations recorded 2026-09-19 using Node v23.11.0 and sharp 0.35.4. JSON seed values are strings to retain integer precision. A null prompt means the reader did not return a supported saved prompt.

Reproduce this result

  1. Download the files above and verify their SHA-256 hashes.
  2. Open the linked isGenAI tool and choose the corresponding file, or the before/after pair for comparisons.
  3. Compare the returned fields with the recorded output. Different tool versions or altered files can produce different results.

The standalone reproduction script creates the fixture variants and compares bytes and pixels. The complete JSON observations also include parser results. Use the workflow and comparison API examples to inspect downloaded files programmatically.

Read the format guide and its primary sources.

What this result does not establish

This example tests a supported record layout. The demonstration model label and prompt are not claims about how the code-drawn pixels were generated.

Files and observations: CC0-1.0. Cite this case URL and include its method and limits. Report a reproducibility issue.