HS: E39 WebWorker plugin stub (+1 test)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/hyperscript/compiler.sx

@@ -1059,9 +1059,16 @@
                         (quote hs-method-call)
                         (cons obj (cons method args))))
                     (if
-                      (and (list? dot-node) (= (first dot-node) (quote ref)))
+                      (and
-                      (list (quote hs-win-call) (nth dot-node 1) (cons (quote list) args))
+                        (list? dot-node)
-                      (cons (quote hs-method-call) (cons (hs-to-sx dot-node) args))))))
+                        (= (first dot-node) (quote ref)))
+                      (list
+                        (quote hs-win-call)
+                        (nth dot-node 1)
+                        (cons (quote list) args))
+                      (cons
+                        (quote hs-method-call)
+                        (cons (hs-to-sx dot-node) args))))))
               ((= head (quote string-postfix))
                 (list (quote str) (hs-to-sx (nth ast 1)) (nth ast 2)))
               ((= head (quote block-literal))
@@ -1231,7 +1238,12 @@
                 (list (quote hs-coerce) (hs-to-sx (nth ast 1)) (nth ast 2)))
               ((= head (quote in?))
                 (list
-                  (quote hs-contains?)
+                  (quote hs-in?)
+                  (hs-to-sx (nth ast 2))
+                  (hs-to-sx (nth ast 1))))
+              ((= head (quote in-bool?))
+                (list
+                  (quote hs-in-bool?)
                   (hs-to-sx (nth ast 2))
                   (hs-to-sx (nth ast 1))))
               ((= head (quote of))
@@ -1717,7 +1729,16 @@
                         (rest (reverse compiled)))
                       (let
                         ((defs (filter (fn (c) (and (list? c) (> (len c) 0) (= (first c) (quote define)))) compiled))
-                          (non-defs (filter (fn (c) (not (and (list? c) (> (len c) 0) (= (first c) (quote define))))) compiled)))
+                          (non-defs
+                            (filter
+                              (fn
+                                (c)
+                                (not
+                                  (and
+                                    (list? c)
+                                    (> (len c) 0)
+                                    (= (first c) (quote define)))))
+                              compiled)))
                         (cons (quote do) (append defs non-defs)))))))
               ((= head (quote wait)) (list (quote hs-wait) (nth ast 1)))
               ((= head (quote wait-for)) (emit-wait-for ast))
@@ -1826,8 +1847,12 @@
                         (make-symbol raw-fn)
                         (hs-to-sx raw-fn)))
                     (args (map hs-to-sx (rest (rest ast)))))
-                  (if (and (list? raw-fn) (= (first raw-fn) (quote ref)))
+                  (if
-                    (list (quote hs-win-call) (nth raw-fn 1) (cons (quote list) args))
+                    (and (list? raw-fn) (= (first raw-fn) (quote ref)))
+                    (list
+                      (quote hs-win-call)
+                      (nth raw-fn 1)
+                      (cons (quote list) args))
                     (cons fn-expr args))))
               ((= head (quote return))
                 (let
@@ -2098,7 +2123,7 @@
                     (hs-to-sx (nth ast 1)))))
               ((= head (quote in?))
                 (list
-                  (quote hs-contains?)
+                  (quote hs-in?)
                   (hs-to-sx (nth ast 2))
                   (hs-to-sx (nth ast 1))))
               ((= head (quote type-check))

lib/hyperscript/parser.sx

@@ -495,7 +495,8 @@
                             (quote and)
                             (list (quote >=) left lo)
                             (list (quote <=) left hi)))))
-                    ((match-kw "in") (list (quote in?) left (parse-expr)))
+                    ((match-kw "in")
+                      (list (quote in-bool?) left (parse-expr)))
                     ((match-kw "really")
                       (do
                         (match-kw "equal")
@@ -571,7 +572,8 @@
                           (let
                             ((right (parse-expr)))
                             (list (quote not) (list (quote =) left right))))))
-                    ((match-kw "in") (list (quote in?) left (parse-expr)))
+                    ((match-kw "in")
+                      (list (quote in-bool?) left (parse-expr)))
                     ((match-kw "empty") (list (quote empty?) left))
                     ((match-kw "between")
                       (let
@@ -2747,6 +2749,7 @@
               ((= val "behavior") (do (adv!) (parse-behavior-feat)))
               ((= val "live") (do (adv!) (parse-live-feat)))
               ((= val "when") (do (adv!) (parse-when-feat)))
+              ((= val "worker") (error "worker plugin is not installed — see https://hyperscript.org/features/worker"))
               (true (parse-cmd-list))))))
       (define
         coll-feats

lib/hyperscript/runtime.sx

@@ -1535,6 +1535,25 @@
                 (hs-contains? (rest collection) item))))))
       (true false))))
 
+(define
+  hs-in?
+  (fn
+    (collection item)
+    (cond
+      ((nil? collection) (list))
+      ((list? collection)
+        (cond
+          ((nil? item) (list))
+          ((list? item)
+            (filter (fn (x) (hs-contains? collection x)) item))
+          ((hs-contains? collection item) (list item))
+          (true (list))))
+      (true (list)))))
+
+(define
+  hs-in-bool?
+  (fn (collection item) (not (hs-falsy? (hs-in? collection item)))))
+
 (define
   hs-is
   (fn

plans/hs-conformance-scoreboard.md

@@ -4,7 +4,7 @@ Live tally for `plans/hs-conformance-to-100.md`. Update after every cluster comm
 
 ```
 Baseline:   1213/1496 (81.1%)
-Merged:     1302/1496 (87.0%)   delta +89
+Merged:     1303/1496 (87.1%)   delta +90
 Worktree:   all landed
 Target:     1496/1496 (100.0%)
 Remaining:  ~194 tests (clusters 17/29(partial)/31 blocked; 33/34 partial)

plans/hs-conformance-to-100.md

@@ -177,6 +177,9 @@ Many tests are `SKIP (untranslated)` because `tests/playwright/generate-sx-tests
 
 (Reverse chronological — newest at top.)
 
+### 2026-04-25 — Bucket F: in-expression filter semantics (+1)
+- **67a5f137** — `HS: in-expression filter semantics (+1 test)`. `1 in [1, 2, 3]` was returning boolean `true` instead of the filtered list `(list 1)`. Root cause: `in?` compiled to `hs-contains?` which returns boolean for scalar items. Fix: (a) `runtime.sx` adds `hs-in?` returning filtered list for all cases, plus `hs-in-bool?` which wraps with `(not (hs-falsy? ...))` for boolean contexts; (b) `compiler.sx` changes `in?` clause to emit `(hs-in? collection item)` and adds new `in-bool?` clause emitting `(hs-in-bool? collection item)`; (c) `parser.sx` changes `is in` and `am in` comparison forms to produce `in-bool?` so those stay boolean. Suite hs-upstream-expressions/in: 8/9 → 9/9. Smoke 0-195: 173/195 unchanged.
+
 ### 2026-04-25 — cluster 22 window global fn fallback (+1)
 - **d31565d5** — `HS cluster 22: simplify win-call emit + def→window + init-blocks test (+1)`. Two-part change building on 337c8265 (host-call-fn FFI + hs-win-call runtime). (a) `compiler.sx` removes the guard wrapper from bare-call and method-call `hs-win-call` emit paths — direct `(hs-win-call name (list args))` is sufficient since hs-win-call returns nil for unknown names; `def` compilation now also emits `(host-set! (host-global "window") name fn)` so every HS-defined function is reachable via window lookup. (b) `generate-sx-tests.py` fixes a quoting bug: `\"here\"` was being embedded as three SX nodes (`""` + symbol + `""`) instead of a single escaped-quote string; fixed with `\\\"` escaping. Hand-rolled deftest for `can refer to function in init blocks` now passes. Suite hs-upstream-core/regressions: 13/16 → 14/16. Smoke 0-195: 172/195 → 173/195.
 

shared/static/wasm/sx/hs-compiler.sx

@@ -1059,9 +1059,16 @@
                         (quote hs-method-call)
                         (cons obj (cons method args))))
                     (if
-                      (and (list? dot-node) (= (first dot-node) (quote ref)))
+                      (and
-                      (list (quote hs-win-call) (nth dot-node 1) (cons (quote list) args))
+                        (list? dot-node)
-                      (cons (quote hs-method-call) (cons (hs-to-sx dot-node) args))))))
+                        (= (first dot-node) (quote ref)))
+                      (list
+                        (quote hs-win-call)
+                        (nth dot-node 1)
+                        (cons (quote list) args))
+                      (cons
+                        (quote hs-method-call)
+                        (cons (hs-to-sx dot-node) args))))))
               ((= head (quote string-postfix))
                 (list (quote str) (hs-to-sx (nth ast 1)) (nth ast 2)))
               ((= head (quote block-literal))
@@ -1231,7 +1238,12 @@
                 (list (quote hs-coerce) (hs-to-sx (nth ast 1)) (nth ast 2)))
               ((= head (quote in?))
                 (list
-                  (quote hs-contains?)
+                  (quote hs-in?)
+                  (hs-to-sx (nth ast 2))
+                  (hs-to-sx (nth ast 1))))
+              ((= head (quote in-bool?))
+                (list
+                  (quote hs-in-bool?)
                   (hs-to-sx (nth ast 2))
                   (hs-to-sx (nth ast 1))))
               ((= head (quote of))
@@ -1717,7 +1729,16 @@
                         (rest (reverse compiled)))
                       (let
                         ((defs (filter (fn (c) (and (list? c) (> (len c) 0) (= (first c) (quote define)))) compiled))
-                          (non-defs (filter (fn (c) (not (and (list? c) (> (len c) 0) (= (first c) (quote define))))) compiled)))
+                          (non-defs
+                            (filter
+                              (fn
+                                (c)
+                                (not
+                                  (and
+                                    (list? c)
+                                    (> (len c) 0)
+                                    (= (first c) (quote define)))))
+                              compiled)))
                         (cons (quote do) (append defs non-defs)))))))
               ((= head (quote wait)) (list (quote hs-wait) (nth ast 1)))
               ((= head (quote wait-for)) (emit-wait-for ast))
@@ -1826,8 +1847,12 @@
                         (make-symbol raw-fn)
                         (hs-to-sx raw-fn)))
                     (args (map hs-to-sx (rest (rest ast)))))
-                  (if (and (list? raw-fn) (= (first raw-fn) (quote ref)))
+                  (if
-                    (list (quote hs-win-call) (nth raw-fn 1) (cons (quote list) args))
+                    (and (list? raw-fn) (= (first raw-fn) (quote ref)))
+                    (list
+                      (quote hs-win-call)
+                      (nth raw-fn 1)
+                      (cons (quote list) args))
                     (cons fn-expr args))))
               ((= head (quote return))
                 (let
@@ -2098,7 +2123,7 @@
                     (hs-to-sx (nth ast 1)))))
               ((= head (quote in?))
                 (list
-                  (quote hs-contains?)
+                  (quote hs-in?)
                   (hs-to-sx (nth ast 2))
                   (hs-to-sx (nth ast 1))))
               ((= head (quote type-check))

shared/static/wasm/sx/hs-parser.sx

@@ -495,7 +495,8 @@
                             (quote and)
                             (list (quote >=) left lo)
                             (list (quote <=) left hi)))))
-                    ((match-kw "in") (list (quote in?) left (parse-expr)))
+                    ((match-kw "in")
+                      (list (quote in-bool?) left (parse-expr)))
                     ((match-kw "really")
                       (do
                         (match-kw "equal")
@@ -571,7 +572,8 @@
                           (let
                             ((right (parse-expr)))
                             (list (quote not) (list (quote =) left right))))))
-                    ((match-kw "in") (list (quote in?) left (parse-expr)))
+                    ((match-kw "in")
+                      (list (quote in-bool?) left (parse-expr)))
                     ((match-kw "empty") (list (quote empty?) left))
                     ((match-kw "between")
                       (let
@@ -2747,6 +2749,7 @@
               ((= val "behavior") (do (adv!) (parse-behavior-feat)))
               ((= val "live") (do (adv!) (parse-live-feat)))
               ((= val "when") (do (adv!) (parse-when-feat)))
+              ((= val "worker") (error "worker plugin is not installed — see https://hyperscript.org/features/worker"))
               (true (parse-cmd-list))))))
       (define
         coll-feats

shared/static/wasm/sx/hs-runtime.sx

@@ -1535,6 +1535,25 @@
                 (hs-contains? (rest collection) item))))))
       (true false))))
 
+(define
+  hs-in?
+  (fn
+    (collection item)
+    (cond
+      ((nil? collection) (list))
+      ((list? collection)
+        (cond
+          ((nil? item) (list))
+          ((list? item)
+            (filter (fn (x) (hs-contains? collection x)) item))
+          ((hs-contains? collection item) (list item))
+          (true (list))))
+      (true (list)))))
+
+(define
+  hs-in-bool?
+  (fn (collection item) (not (hs-falsy? (hs-in? collection item)))))
+
 (define
   hs-is
   (fn

spec/tests/test-hyperscript-behavioral.sx

@@ -13595,5 +13595,9 @@ end")
 ;; ── worker (1 tests) ──
 (defsuite "hs-upstream-worker"
   (deftest "raises a helpful error when the worker plugin is not installed"
-    (error "SKIP (untranslated): raises a helpful error when the worker plugin is not installed"))
+    (let ((result (guard (e (true (if (string? e) e (str e))))
+                    (hs-compile "worker MyWorker def noop() end end")
+                    "")))
+      (assert (contains? result "worker plugin"))
+      (assert (contains? result "hyperscript.org/features/worker"))))
 )