diff --git a/agents/magica/work/queue-331/BUILD.md b/agents/magica/work/queue-331/BUILD.md
index 25793e61d..2c03525f8 100644
--- a/agents/magica/work/queue-331/BUILD.md
+++ b/agents/magica/work/queue-331/BUILD.md
@@ -303,3 +303,17 @@ remain in f83206473; hashes below make the presentation change reviewable.
 - red-cli-guards.log: original SHA256 45d6f847556259d00511904dbe933272adcae251e6d0bf539d19eb03f93bfcad; normalized SHA256 9645a7c408249ecbacbfaa7d631a5b98c380916a2aa37985061b27a6ed05e1b0
 - red-client-probe.log: original SHA256 3c3bc989a00e2d3860a44712b31a93d80cf8395c9260777f5a94c09ff45f42e1; normalized SHA256 e72318cbbc3fb0803770e4bb8e8ded9725fb4c4ebee6ea4bec365bceaa68250a
 - red-model-store.log: original SHA256 5d46867eacee5ed014ed71cc45120de9c79167fc08c8583276eaec5fc5e5bfcc; normalized SHA256 1797d611f72f417612e6b7b24f3119ae0f079dc0b9a12acba087ab5c8b2cec59
+
+### Base comparison and direct handoffs — sage-4409
+
+Compared `git diff --name-only 78b69e1e6 775bbe236` against all 262 GREEN files and
+all 26 changed .mjs modules. Both intersections are empty (base-overlap.json).
+BUILD-LOG.md and docs/SESSIONS.md overlap only as append-only tracking files;
+no test/source rebase trigger under Sage's condition. Published implementation
+candidate remains fb484acb7. This follow-up records metadata only.
+
+Fethry (14f80e3c-ace7-4793-a577-e1275ca09b0b) received the exact trusted P3 interface
+in magica-331-0010. Boyd (48a3ae38-83aa-4d3f-9064-64e911ec4547) received the build
+notice with option C review flag in magica-331-0011. Sage copied in -0012.
+Both notices say GREEN/mutants are pending and do not request a test slot.
+Sage ordered 331 GREEN/mutants after Bubba's 288 and before198; awaiting CLEAR.
diff --git a/agents/magica/work/queue-331/base-overlap.json b/agents/magica/work/queue-331/base-overlap.json
new file mode 100644
index 000000000..ee07fe7f2
--- /dev/null
+++ b/agents/magica/work/queue-331/base-overlap.json
@@ -0,0 +1,10 @@
+{
+  "from": "78b69e1e6",
+  "to": "775bbe236",
+  "greenFiles": [],
+  "changedModules": [],
+  "ownDocs": [
+    "BUILD-LOG.md",
+    "docs/SESSIONS.md"
+  ]
+}