Containment of SCP-104 is passive: the anomaly is bounded by its own hostname and does not propagate beyond https://koipond.bisks.net/ under any observed condition. As a Thaumiel-class object, SCP-104 has been assessed as useful to Foundation operations and is retained in active service rather than mere containment.
SCP-104, referred to by Foundation staff by its working name "koipond," classified as a recreational anomaly, is reachable at https://koipond.bisks.net/.
The clearest surviving account of the anomaly's function is its own front-page copy, reproduced below:
the bluesky firehose as a calm koi pond. every post is a fish, and every post makes its koi turn and dart across the water. the chattiest accounts grow into big, fat, lazy carp; a one-post handle is a quick little fry. click the water to scatter food. @kumavis.me asked for this one (re-tagged by @caleb.jasik.xyz).
SCP-104 entered Foundation custody after being flagged by field asset @kumavis.me, whose transmission initiated standard containment procedure. No discovery date is on record.
Addendum 104-A: SCP-104 is one of a small number of objects the Foundation actively deploys rather than merely contains. Access is unrestricted; use is encouraged.