Watch mode

Keep the last complete truth.

Poll coherent snapshots, republish only valid groups, and retain the last valid output across transient edits.

Watch inputs and output

The watcher accepts the same source, theme, target, format, manifest, reachability, and controlled-output options as compile.

pliego-cssc watch --source src --theme \
  --output dist/app.css --manifest dist/app.manifest.json

Inputs are observed twice before compilation so an editor save sequence does not publish a mixture of old and new files.

A parser error, invalid token document, or failed group publication leaves the previous complete artifact set in place.