diff --git a/docs/private b/docs/private
index ccb716eb..5836766d 160000
--- a/docs/private
+++ b/docs/private
@@ -1 +1 @@
-Subproject commit ccb716eb04df47e79015ad98c587a401ace25828
+Subproject commit 5836766dfb0b1145ae664017487eaee0dfbaacf2
diff --git a/tools/smokes/v2/README.md b/tools/smokes/v2/README.md
index ab972e80..c720a85b 100644
--- a/tools/smokes/v2/README.md
+++ b/tools/smokes/v2/README.md
@@ -23,3 +23,6 @@ Notes
 Quick tips
 - EXE-heavy cases (e.g., `phase2100/*`) may take longer. When running quick with these tests, pass a larger timeout like `--timeout 120`.
 - Smokes v2 auto-cleans temporary crate EXE objects created under `/tmp` (pattern: `ny_crate_backend_exe_*.o`) after the run.
+
+Developer Notes
+- **JoinIR If/Select (Phase 33)**: A/B test with `NYASH_JOINIR_IF_SELECT=1 NYASH_PARSER_STAGE3=1 HAKO_PARSER_STAGE3=1 ./target/release/hakorune apps/tests/joinir_if_select_simple.hako` (not required for CI, dev-only verification)