Built-in checks

Add these in a stage's Checks & Quality control section with + Add builtin check. See Checks for how checks work.

A path says where in the output to look: a field name, or fields separated by dots such as scene.narration. Leave it empty to check the whole output. Text checks read the text of a text output, or the words spoken in a Generate Speech output, without needing a path.

Settings marked required must be filled in. A min or max left empty isn't checked.

Check	What it tests	Settings
non_empty	A value is not empty: text that isn't blank, a list with items, an object with fields	path
word_count	The number of words in some text	path, min, max
regex_match	Some text matches a pattern	pattern (required), flags, path
regex_absent	Some text does not match a pattern	pattern (required), flags, path
numeric_range	A number is within a range	path (required), min, max
array_length	A list has a number of items within a range	path (required), min, max
duration_range	The length of a video or audio file, in seconds	min, max
media_format	The file's container and/or codec	container, codec
wpm	Words spoken per minute, in a Generate Speech output	min, max
drawing	A drawing a model made can be drawn: its paths are valid	path

Details

Words are counted by splitting on spaces and line breaks.

Patterns (regex_match, regex_absent) are regular expressions of up to 200 characters. flags are the usual single letters, up to 5, such as i to ignore capital letters. The text must be text: a pattern on a number fails. A pattern that isn't valid is an authoring error.

duration_range and media_format read the file's technical details. They fail with artifact has no probe metadata if Reelcraft couldn't read the file.

wpm divides the spoken words by the audio's length in minutes. It only works on Generate Speech outputs.

drawing checks a drawing, or a list of drawings, an id and strokes of SVG path data on a 100 by 100 grid. Every path must use only the drawing commands (M L H V C S Q T A Z), stay on the grid, and be big enough to see; colours must be theme colours or hex colours; line weights thin, normal or bold. It lists everything wrong at once, by stroke, so that the retry that follows can fix it. Put it on the stage that draws, with a path of drawings if the answer holds a list. See Prepare Drawings.

motion_code checks a motion graphic's code: it parses, imports only Remotion's packages and React, has a default export, and uses no network, storage, clock, timers, random numbers or CSS animations. It lists every problem at once. Put it on a Generate Motion Graphic stage, with Check attempts of 2 or 3, so the model fixes what's wrong.

Messages

A failing check says why, prefixed with its name. For example:

• word_count: 41 words, expected at least 60
• regex_absent: pattern "buy now" unexpectedly matched
• numeric_range: 12 is above maximum 10
• array_length: length 2 is below minimum 3
• duration_range: 34.2s is above maximum 30s
• wpm: 187.3 words/min is above maximum 170
• non_empty: value at "script" is empty
• drawing: stroke 2: the path leaves the 100 by 100 grid (it spans 0,0 to 900,900)

A check that is itself wrong, such as a bad setting or a script with an error, is reported as an authoring problem instead. See When a stage fails.