diff --git a/lib/lua/scoreboard.json b/lib/lua/scoreboard.json
index 0d187207..caf71971 100644
--- a/lib/lua/scoreboard.json
+++ b/lib/lua/scoreboard.json
@@ -39,7 +39,7 @@
       "name": "attrib.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 5565
+      "ms": 5754
     },
     {
       "name": "big.lua",
@@ -51,7 +51,7 @@
       "name": "calls.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 4455
+      "ms": 4651
     },
     {
       "name": "checktable.lua",
@@ -63,7 +63,7 @@
       "name": "closure.lua",
       "status": "timeout",
       "reason": "per-test timeout",
-      "ms": 8007
+      "ms": 8006
     },
     {
       "name": "code.lua",
@@ -75,7 +75,7 @@
       "name": "constructs.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 4074
+      "ms": 4212
     },
     {
       "name": "db.lua",
@@ -87,13 +87,13 @@
       "name": "errors.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 2974
+      "ms": 3006
     },
     {
       "name": "events.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 6657
+      "ms": 6900
     },
     {
       "name": "files.lua",
@@ -111,13 +111,13 @@
       "name": "literals.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 1730
+      "ms": 1804
     },
     {
       "name": "locals.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 1597
+      "ms": 1596
     },
     {
       "name": "main.lua",
@@ -129,43 +129,43 @@
       "name": "math.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 3721
+      "ms": 3930
     },
     {
       "name": "nextvar.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 6582
+      "ms": 6822
     },
     {
       "name": "pm.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 5582
+      "ms": 5745
     },
     {
       "name": "sort.lua",
       "status": "timeout",
       "reason": "per-test timeout",
-      "ms": 8008
+      "ms": 8007
     },
     {
       "name": "strings.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 3704
+      "ms": 3814
     },
     {
       "name": "vararg.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"assertion failed!\\\\\\\"\\",
-      "ms": 2041
+      "ms": 2140
     },
     {
       "name": "verybig.lua",
       "status": "fail",
       "reason": "other: Unhandled exception: \\\"Unhandled exception: \\\\\\\"lua: attempt to call non-functio",
-      "ms": 528
+      "ms": 558
     }
   ]
 }
\ No newline at end of file
diff --git a/lib/lua/scoreboard.md b/lib/lua/scoreboard.md
index ce79ad79..7a0a6189 100644
--- a/lib/lua/scoreboard.md
+++ b/lib/lua/scoreboard.md
@@ -15,25 +15,25 @@ fail=13 timeout=3 skip=8 total=24
 |---|---|---|---:|
 | all.lua | skip | driver uses dofile to chain other tests | 0 |
 | api.lua | skip | requires testC (C debug library) | 0 |
-| attrib.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 5565 |
+| attrib.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 5754 |
 | big.lua | timeout | per-test timeout | 8008 |
-| calls.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 4455 |
+| calls.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 4651 |
 | checktable.lua | skip | internal debug helpers | 0 |
-| closure.lua | timeout | per-test timeout | 8007 |
+| closure.lua | timeout | per-test timeout | 8006 |
 | code.lua | skip | bytecode inspection via debug library | 0 |
-| constructs.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 4074 |
+| constructs.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 4212 |
 | db.lua | skip | debug library | 0 |
-| errors.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 2974 |
-| events.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 6657 |
+| errors.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 3006 |
+| events.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 6900 |
 | files.lua | skip | io library | 0 |
 | gc.lua | skip | collectgarbage / finalisers | 0 |
-| literals.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 1730 |
-| locals.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 1597 |
+| literals.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 1804 |
+| locals.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 1596 |
 | main.lua | skip | standalone interpreter driver | 0 |
-| math.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 3721 |
-| nextvar.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 6582 |
-| pm.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 5582 |
-| sort.lua | timeout | per-test timeout | 8008 |
-| strings.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 3704 |
-| vararg.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 2041 |
-| verybig.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"lua: attempt to call non-functio | 528 |
+| math.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 3930 |
+| nextvar.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 6822 |
+| pm.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 5745 |
+| sort.lua | timeout | per-test timeout | 8007 |
+| strings.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 3814 |
+| vararg.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"assertion failed!\\\"\ | 2140 |
+| verybig.lua | fail | other: Unhandled exception: \"Unhandled exception: \\\"lua: attempt to call non-functio | 558 |
diff --git a/lib/lua/test.sh b/lib/lua/test.sh
index 8ce047e0..cadc2c3f 100755
--- a/lib/lua/test.sh
+++ b/lib/lua/test.sh
@@ -908,6 +908,14 @@ cat > "$TMPFILE" << 'EPOCHS'
 (epoch 1801)
 (eval "(lua-eval-ast \"do local i = 10 do local i = 100 assert(i == 100) end assert(i == 10) end return \\\"ok\\\"\")")
 
+;; ── if/else/elseif body scoping ──────────────────────────────
+(epoch 1810)
+(eval "(lua-eval-ast \"local x = 10 if true then local x = 99 end return x\")")
+(epoch 1811)
+(eval "(lua-eval-ast \"local x = 10 if false then else local x = 99 end return x\")")
+(epoch 1812)
+(eval "(lua-eval-ast \"local x = 10 if false then elseif true then local x = 99 end return x\")")
+
 EPOCHS
 
 OUTPUT=$(timeout 60 "$SX_SERVER" < "$TMPFILE" 2>/dev/null)
@@ -1368,6 +1376,11 @@ check 1705 "f(a, b, ...) mixed"             '783'
 check 1800 "inner do local shadows"         '10'
 check 1801 "nested do scopes"               '"ok"'
 
+# ── if/else/elseif body scoping ──────────────────────────────
+check 1810 "if then local shadows"          '10'
+check 1811 "else local shadows"             '10'
+check 1812 "elseif local shadows"           '10'
+
 TOTAL=$((PASS + FAIL))
 if [ $FAIL -eq 0 ]; then
   echo "ok $PASS/$TOTAL Lua-on-SX tests passed"
diff --git a/lib/lua/transpile.sx b/lib/lua/transpile.sx
index a1124744..f7feaefe 100644
--- a/lib/lua/transpile.sx
+++ b/lib/lua/transpile.sx
@@ -303,13 +303,18 @@
           rhs))
       (else (error "lua-transpile: bad assignment target")))))
 
+(define
+  lua-tx-if-body
+  (fn (body)
+    (list (make-symbol "let") (list) body)))
+
 (define
   lua-tx-if
   (fn
     (node)
     (let
       ((cnd (lua-tx (nth node 1)))
-        (then-body (lua-tx (nth node 2)))
+        (then-body (lua-tx-if-body (lua-tx (nth node 2))))
         (elseifs (nth node 3))
         (else-body (nth node 4)))
       (if
@@ -333,7 +338,7 @@
           clauses
           (append
             clauses
-            (list (list (make-symbol "else") (lua-tx else-body)))))))))
+            (list (list (make-symbol "else") (lua-tx-if-body (lua-tx else-body))))))))))
 
 (define
   lua-tx-elseif
@@ -341,7 +346,7 @@
     (pair)
     (list
       (list (make-symbol "lua-truthy?") (lua-tx (first pair)))
-      (lua-tx (nth pair 1)))))
+      (lua-tx-if-body (lua-tx (nth pair 1))))))
 
 (define
   lua-tx-while
diff --git a/plans/lua-on-sx.md b/plans/lua-on-sx.md
index ad93e2ad..20bae1ca 100644
--- a/plans/lua-on-sx.md
+++ b/plans/lua-on-sx.md
@@ -82,6 +82,7 @@ Each item: implement → tests → tick box → update progress log.
 
 _Newest first. Agent appends on every commit._
 
+- 2026-04-24: lua: scoreboard iteration — **`if`/`else`/`elseif` body scoping** (latent bug). `else local x = 99` was leaking to enclosing scope. Wrap all three branches in `(let () …)` via `lua-tx-if-body`. 358 tests.
 - 2026-04-24: lua: scoreboard iteration — **`do`-block proper scoping**. Was transpiling `do ... end` to a raw `lua-tx` pass-through, so `define`s inside leaked to the enclosing scope (`do local i = 100 end` overwrote outer `i`). Now wraps in `(let () body)` for proper lexical isolation. 355 tests, +2 scoping tests.
 - 2026-04-24: lua: scoreboard iteration — `lua-to-number` trims whitespace before `parse-number` (Lua coerces `" 3e0 "` in arithmetic). math.lua moved past the arith-type error to deeper assertion-land. 12× asserts / 3× timeouts / 1× call-non-fn.
 - 2026-04-24: lua: scoreboard iteration — `table.getn`/`setn`/`foreach`/`foreachi` (Lua 5.0-era), `string.reverse`. `sort.lua` unblocked past `getn`-undef; now times out on the 30k-element sort body (insertion sort too slow). 13 fail / 3 timeout / 0 pass.