diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c217be..af6febf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,3 +20,11 @@ and this project adheres to [Semantic Versioning][].
   SpatialData zarr stores, optionally with aligned H&E images, tissue
   segmentation, and Visium-like pseudo-spots; download a Xenium study's raw
   assets from a `curl -O <url>` manifest.
+- `spatialrefinery.segmentation`: nucleus segmentation on H&E whole-slide
+  images via InstanSeg (`instanseg`), and export of the resulting boundaries
+  as a SpatialData zarr store carrying the slide image, the nucleus polygons,
+  and a table over a template gene panel (`to_spatialdata`). Needs the
+  optional `segmentation` extra. The store is named for the slide's stem, so
+  `slide.ome.tif` yields `slide.zarr`.
+- Tutorial notebook for the segmentation pipeline, taking an OME-TIFF through
+  segmentation to a written SpatialData zarr.
diff --git a/docs/api.md b/docs/api.md
index ccf7a50..d9eb9d9 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -61,7 +61,6 @@ extra -- see [Installation](installation.md).
     :nosignatures:
 
     geojson_to_spatialdata
-    default_zarr_path
 ```
 
 :::{note}