Plugin idea: feed-ingest — subscribe to external RSS/Atom into the pod #9

The inverse of rss/: subscribe to external feed URLs and store new items as pod resources. A corsproxy/-style fetch of the feed, parse, dedupe, write via loopback with the owner's credentials.

Careful: fetches operator/user-supplied external URLs → SSRF gate required (reuse the corsproxy/ / activitypub/ guard). Otherwise a clean, well-scoped plugin.

Copy from: rss/ (Atom/RSS shapes), corsproxy/ (gated fetch), micropub/ (pod write). See AGENT.md.