diff --git a/work/link-taxonomy-migration/README.md b/work/link-taxonomy-migration/README.md
index 27acf02..506e7c6 100644
--- a/work/link-taxonomy-migration/README.md
+++ b/work/link-taxonomy-migration/README.md
@@ -53,7 +53,10 @@ Every unit in `plan.md` is published, and:
 
 - [x] u0 mechanism - taxonomy, `links.py`, `blocks.py`, `xref` rewrite, lint checks,
       `links show` for the inbound view, deletion of the matching layer. No page touched.
-- [ ] u1 `kb/entities/` (systems, tools, technologies)
+- [x] u1 `kb/entities/` (systems, tools, technologies) - 57 pages, 199 edges, run as five
+      sub-sessions (`u1`, `u1-technologies`, `u1-technologies-2`, `u1-tools-1`, `u1-tools-2`,
+      `u1-close`) against one 60-call-per-session ceiling; published together as commit
+      `b137359`. Deferred cross-collection edges recorded in `glossary.md` for u2/u3.
 - [ ] u2 `kb/entities/` (projects, people) + `kb/comparisons/`
 - [ ] u3 `kb/concepts/`
 - [ ] u4 `kb/sources/`