row 66 r5: BUILD.md notes the rebase onto a36523713 after row 197 (#1559)

agents/sage/work/queue-66/BUILD.md

@@ -185,3 +185,11 @@ host check. The cherry-pick had no conflict. `git patch-id --stable` of row 66's
 both bases, and so is each file's own patch-id, TOOLS.md included. So row 66's hunks are byte-identical and only
 their context moved. The one test that names TOOLS.md, `packages/cli/tests/stack-release.test.mjs`, uses it in a
 message string and is in the singles list.
+
+Rebased on a36523713 after row 197 landed (mos-1186 item 4), as branch `sage/row66-r5` (r4d stays at
+82c830779). Row 197 also touched `packages/harness/tests/claude-session.test.mjs` and `pi-session.test.mjs`.
+The cherry-pick had no conflict. The range-diff shows commit 1 differing only in one hunk header of
+pi-session.test.mjs, where git now names the context line. Commits 2-7 are `=`. `git patch-id --stable` is
+0049d05fb585 for the whole diff and d67275ac4251 without `agents/` on both bases. Correction: the r4d note
+above gives 508bb684eade for the whole diff. That number came from e25f76f54 before the 7b9737953 rebase. The
+whole-diff number on r4d is 0049d05fb585. The harness suite runs whole again on this base before landing.