diff --git a/TODO.md b/TODO.md
index 5959a36..384addd 100644
--- a/TODO.md
+++ b/TODO.md
@@ -45,6 +45,17 @@ but the review is broader than any of them.
 
 # Completed Steps
 
+- 2026-10-07: Stale branches pruned from `origin`
+  ([#167](https://git.eeqj.de/sneak/AutistMask/issues/167)). Seventeen branches
+  were deleted: each one's work is in `next`, either as the same patch or
+  through another pull request merged for the same issue. The issue records the
+  evidence for each. Four are kept for triage: `fix/consistent-error-display`,
+  `fix/87-consistent-error-display` and `fix/87-consistent-error-display-v2`,
+  whose change never landed although
+  [#87](https://git.eeqj.de/sneak/AutistMask/issues/87) is closed, and
+  `feature/show-private-key`, whose README clipboard policy section is not in
+  `next`.
+
 - 2026-10-07: The toolbar icons in `icons/` can be redrawn in the tree
   ([#378](https://git.eeqj.de/sneak/AutistMask/issues/378)): `make icons` runs
   `script/lib/icons.js`, which draws the mark and writes each PNG with node's