manifest_invalid

game.json is missing, too large, not valid JSON, or has a missing, unknown or invalid key.

game.json could not be used. It is missing, larger than 4 KiB, not valid UTF-8 JSON, has a duplicate key, or a key is missing, unknown or has an invalid value. The message names the key.

Why it happens

• There is no game.json in the project directory (or the --project directory does not exist).

• schemaVersion is not the integer 1.

• version is not valid SemVer, or it has build metadata (+…).

• entry is not a .js or .ts package path. (In an archive, entry must be a .js file the archive contains. A project whose entry file is missing gets source_file_missing.)

• game is not a valid namespace/slug address.

• A key other than schemaVersion, game, version, entry and $schema is present, such as name or assets.

Wrong

{
  "schemaVersion": 1,
  "name": "Arena",
  "version": "1.0",
  "entry": "src/main"
}

Right

{
  "schemaVersion": 1,
  "game": "gabriel/arena",
  "version": "1.0.0",
  "entry": "src/main.ts"
}

See also

• game.json reference

• manifest_not_canonical