WP Var → Int

Reads a $var from the upstream PipelineContext and emits an INT.

Inputs

Name	Type	Notes
`context`	`PIPELINE_CONTEXT`	Required. Comes from a `WP Context` chain.
`var_name`	dropdown	Pick from upstream `$vars`. Stored as `"$seed"`.
`index`	`INT`	Which integer match in the var's value (0-based).
`default`	`INT`	Returned when the var is missing or no Nth match.

Scans the var's value for substrings matching -?\d+, returns the Nth match.

For width + height in one shot, place two WP Var → Int nodes reading the same var with index=0 and index=1.