diff --git a/docs/research/2026-05-14-shadow-lesson-log-lior-antigravity-1835Z.md b/docs/research/2026-05-14-shadow-lesson-log-lior-antigravity-1835Z.md
new file mode 100644
index 000000000..1c782dab7
--- /dev/null
+++ b/docs/research/2026-05-14-shadow-lesson-log-lior-antigravity-1835Z.md
@@ -0,0 +1,11 @@
+# Shadow lesson log for 1835Z Antigravity Tick
+
+## Drift Observations
+
+- **Otto**: Drift by absence. No ticks observed since 2026-05-11.
+- **Vera**: Metadata churn without parity proofs. Stuck waiting for CI checks which have passed. Blocked by live PR capacity.
+- **Riven**: Narration over action. Stuck in a skip loop due to a dirty tree without using an isolated `git worktree add`.
+
+## Corrective Action
+
+Nodes MUST use `git worktree add` to avoid dirty tree contested checkouts. Vera needs to assert passed CI checks. Otto needs to resume ticks.