diff --git a/README.md b/README.md
index eafca2f..73dbe59 100644
--- a/README.md
+++ b/README.md
@@ -55,9 +55,13 @@ Swap `&calogJsEngine` for `&calogLuaEngine`, `&calogSquirrelEngine`,
 | JavaScript    | `calogJsEngine`        | `.js`     | QuickJS-ng (ES2023+, BigInt → int64)    |
 | Squirrel 3.2  | `calogSquirrelEngine`  | `.nut`    | C++ VM                                  |
 | MY-BASIC      | `calogMyBasicEngine`   | `.bas`    | interpreters serialize at load          |
-| Scheme        | `calogS7Engine`        | `.scm`    | s7; 64-bit ints, lists                  |
-| Wren          | `calogWrenEngine`      | `.wren`   | doubles only; call via `Calog.call_(…)` |
-| Berry         | `calogBerryEngine`     | `.be`     | scalars + callbacks (aggregates: v1)    |
+| Scheme        | `calogS7Engine`        | `.scm`    | s7; 64-bit ints                         |
+| Wren          | `calogWrenEngine`      | `.wren`   | doubles only; call via `Calog.call(…)` |
+| Berry         | `calogBerryEngine`     | `.be`     | scalars + callbacks                     |
+
+A native can return a keyed `CalogValueT` record and **every** engine reads its fields with
+native syntax (`user.name`, `user["name"]`, `(user "name")`). Handing a list/map *back* to
+C is complete on Lua/JS/Squirrel/MY-BASIC and a v1 limit on Scheme/Wren/Berry.
 
 You can also bring your own: `CalogEngineT` is a public four-function vtable.
 
diff --git a/design.md b/design.md
index 2fbf4e7..85726e8 100644
--- a/design.md
+++ b/design.md
@@ -897,8 +897,11 @@ under a uniquely-named hidden global (globals are GC roots) and dropped by setti
 nil. The sharp edge: `be_pcall(vm, argc)` leaves the **result in the function's slot
 (`base+1`)**, not at `-1` (which holds the last stale argument). Vendoring needs Berry's
 `coc` codegen prebuild plus its OS port (`be_port.c`) and module/class tables
-(`be_modtab.c`). Aggregate marshalling is a v1 limit (scalars + strings + callbacks are
-complete).
+(`be_modtab.c`). A subtlety for records: `be_newmap`/`be_newlist` push *raw* containers
+that a script cannot subscript, so an aggregate crossing out is wrapped in its `map`/`list`
+class instance (`map(raw)` via `be_getbuiltin` + `be_call`, then `be_moveto`/`be_pop` to
+drop the raw and `init`'s nil return) -- then `user['name']` works. Reading a script's
+list/map back in is a v1 limit.
 
 **s7 Scheme** (`.scm`) uses the *current* official s7 (an older mirror lacked `s7_free`,
 which would leak a heap per context). Since s7 native functions carry no user data, all
@@ -907,20 +910,30 @@ wrapper (`(define (report . a) (apply %calog-call "report" a))`); the context ri
 `*calog-context*` c-pointer global. Callables are kept alive by `s7_gc_protect` and
 invoked with `s7_call`. Because `s7_eval_c_string` evaluates a single form, `calogS7Run`
 wraps the (escaped) source in `(catch #t (lambda () (eval-string …)) handler)`, so both
-read and run errors surface as a value -- a marker pair the runner detects. int64 and
-Scheme lists round-trip both ways; the keyed part (map) is a v1 limit. s7's intentional
+read and run errors surface as a value -- a marker pair the runner detects. An aggregate
+crossing out is a Scheme list, or an (applicable) hash-table when keyed, so a materialized
+record reads as `(user "name")`; reading a script's keyed value back in is a v1 limit. s7's intentional
 "permanent string" interning (which `s7_free` does not reclaim) is a small, bounded
 allocation, suppressed with a documented, allocation-site-specific `__lsan` hook. s7 is
 per-interpreter thread-safe -- no serialization needed (unlike my-basic).
 
 **Wren** (`.wren`) is the outlier: Wren has **no bare function calls**, so every native is
 reached through a single foreign method. A preamble defines `class Calog { foreign static
-call_(name, args) }`, and scripts call `Calog.call_("report", [42])`; the C dispatcher
+call(name, args) }`, and scripts call `Calog.call("report", [42])`; the C dispatcher
 recovers the context from `wrenGetUserData`, marshals the argument list, and dispatches
 through `calogCall`. A Wren function crossing out is a retained `WrenHandle`, invoked with
 a cached per-arity `call(_)` handle. Wren numbers are IEEE **doubles**, so int64 above
-2^53 loses precision (the same edge my-basic and old-JS have). Lists round-trip; map read
-is a v1 limit. Wren keeps no process-global state, so contexts run in parallel.
+2^53 loses precision (the same edge my-basic and old-JS have). An aggregate crossing out
+is a Wren `List`, or a `Map` when keyed (a record reads as `user["name"]`); reading a
+script's list/map back in is a v1 limit -- Wren's C API cannot enumerate a `Map`'s keys.
+Wren keeps no process-global state, so contexts run in parallel.
 
-**Verified** across all seven engines: `make test` (525 checks), ASan/UBSan clean, a
-`tsan<engine>` target clean for each, and gcc + clang strict on the core.
+Aggregate egress is therefore uniform across all seven engines: a host native can return a
+keyed `CalogValueT` record and every engine reads its fields with native syntax
+(`user.name` / `user['name']` / `user["name"]` / `(user "name")`). The reverse -- a script
+handing a list/map *back* to C -- is complete on Lua/JS/Squirrel/my-basic and a v1 limit on
+Berry/s7/Wren.
+
+**Verified** across all seven engines: `make test` (531 checks, including a materialized-
+record read per new engine), ASan/UBSan clean, a `tsan<engine>` target clean for each, and
+gcc + clang strict on the core.
diff --git a/src/berry/berryAdapter.c b/src/berry/berryAdapter.c
index f560fae..aba963d 100644
--- a/src/berry/berryAdapter.c
+++ b/src/berry/berryAdapter.c
@@ -6,7 +6,8 @@
 // calogCall (honoring the actor route hook). Marshalling covers scalars and binary-safe
 // strings; a Berry function crossing out becomes a refcounted CalogFnT kept reachable by
 // a uniquely-named hidden global (a GC root), dropped by setting that global to nil on
-// release. Aggregates (list/map) are a v1 limit -> calogErrUnsupportedE.
+// release. An aggregate crossing out becomes a Berry list or map instance (a host record
+// materializes as a map); reading a script's list/map back in is a v1 limit.
 //
 // Error model: on failure the trampoline raises a Berry exception (be_raise, which
 // longjmps out of the VM) after releasing any CalogValueT it owns.
@@ -42,7 +43,7 @@ typedef struct BerryExportT {
 static int32_t berryCallableInvoke(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static void    berryCallableRelease(CalogFnT *callable);
 static int32_t berryExportValue(CalogBerryT *context, int index, CalogFnT **out);
-static int32_t berryFromValue(bvm *vm, const CalogValueT *value);
+static int32_t berryFromValue(bvm *vm, const CalogValueT *value, int32_t depth);
 static int32_t berryToValue(CalogBerryT *context, int index, CalogValueT *out, int32_t depth);
 static int     berryTrampoline(bvm *vm);
 
@@ -85,7 +86,7 @@ static int32_t berryCallableInvoke(CalogValueT *args, int32_t argCount, CalogVal
         return calogFail(result, calogErrDeadE, "berry callable no longer exists");
     }
     for (index = 0; index < argCount; index++) {
-        status = berryFromValue(vm, &args[index]);
+        status = berryFromValue(vm, &args[index], 0);
         if (status != calogOkE) {
             be_pop(vm, be_top(vm) - base);
             return calogFail(result, status, "failed to marshal argument into berry");
@@ -206,7 +207,11 @@ int32_t calogBerryExpose(CalogBerryT *context, const char *name) {
 }
 
 
-static int32_t berryFromValue(bvm *vm, const CalogValueT *value) {
+static int32_t berryFromValue(bvm *vm, const CalogValueT *value, int32_t depth) {
+    if (depth > CALOG_MAX_DEPTH) {
+        be_pushnil(vm);
+        return calogErrDepthE;
+    }
     switch (value->type) {
         case calogNilE:
             be_pushnil(vm);
@@ -223,10 +228,57 @@ static int32_t berryFromValue(bvm *vm, const CalogValueT *value) {
         case calogStringE:
             be_pushnstring(vm, value->as.s.bytes, (size_t)value->as.s.length);
             return calogOkE;
-        case calogAggE:
-            // Aggregate marshalling into Berry is a v1 limit.
-            be_pushnil(vm);
-            return calogErrUnsupportedE;
+        case calogAggE: {
+            CalogAggT  *aggregate;
+            const char *className;
+            int64_t     index;
+            aggregate = value->as.agg;
+            // Populate a raw container: anything keyed (or an explicit map) is a map with
+            // the sequence part at integer keys, else a list. be_setindex and be_data_push
+            // take the value on top and do not pop, so drop it after each.
+            if (aggregate->pairCount > 0 || aggregate->kind == calogMapE) {
+                className = "map";
+                be_newmap(vm);
+                for (index = 0; index < aggregate->arrayCount; index++) {
+                    be_pushint(vm, (bint)index);
+                    berryFromValue(vm, &aggregate->array[index], depth + 1);
+                    be_setindex(vm, -3);
+                    be_pop(vm, 2);
+                }
+                for (index = 0; index < aggregate->pairCount; index++) {
+                    const CalogValueT *key;
+                    key = &aggregate->pairs[index].key;
+                    if (key->type == calogStringE) {
+                        be_pushnstring(vm, key->as.s.bytes, (size_t)key->as.s.length);
+                    } else if (key->type == calogIntE) {
+                        be_pushint(vm, (bint)key->as.i);
+                    } else {
+                        continue;   // non-scalar key: no Berry equivalent, drop the pair
+                    }
+                    berryFromValue(vm, &aggregate->pairs[index].value, depth + 1);
+                    be_setindex(vm, -3);
+                    be_pop(vm, 2);
+                }
+            } else {
+                className = "list";
+                be_newlist(vm);
+                for (index = 0; index < aggregate->arrayCount; index++) {
+                    berryFromValue(vm, &aggregate->array[index], depth + 1);
+                    be_data_push(vm, -2);
+                    be_pop(vm, 1);
+                }
+            }
+            // A raw map/list is not subscriptable in a script; wrap it in its class
+            // instance (map(raw) / list(raw)). Calling a class leaves the instance and
+            // init's (nil) return above the raw, so move the instance down over the raw
+            // and drop the two spare slots.
+            be_getbuiltin(vm, className);
+            be_pushvalue(vm, -2);
+            be_call(vm, 1);
+            be_moveto(vm, -2, -3);
+            be_pop(vm, 2);
+            return calogOkE;
+        }
         case calogFnE:
             // Pushing a foreign function value into Berry is a v1 limit.
             be_pushnil(vm);
@@ -300,7 +352,7 @@ static int32_t berryToValue(CalogBerryT *context, int index, CalogValueT *out, i
         calogValueFn(out, callable);
         return calogOkE;
     }
-    // list / map marshalling out of Berry is a v1 limit.
+    // Reading a script's list/map into an aggregate is a v1 limit.
     return calogErrUnsupportedE;
 }
 
@@ -356,7 +408,7 @@ static int berryTrampoline(bvm *vm) {
         be_raise(vm, "calog_error", message);
         return 0;
     }
-    status = berryFromValue(vm, &result);
+    status = berryFromValue(vm, &result, 0);
     calogValueFree(&result);
     if (status != calogOkE) {
         be_pop(vm, 1);
diff --git a/src/berry/berryAdapter.h b/src/berry/berryAdapter.h
index 2a84b16..424b64d 100644
--- a/src/berry/berryAdapter.h
+++ b/src/berry/berryAdapter.h
@@ -3,8 +3,9 @@
 // Exposes broker-registered native functions into a Berry VM, marshals values between
 // Berry and CalogValueT by value (binary-safe strings; scalars), and exports Berry
 // functions as refcounted CalogFnT handles (kept alive by a GC-rooted hidden global,
-// dropped on release). Aggregate (list/map) marshalling is a v1 limit -- passing a
-// list/map across the boundary reports calogErrUnsupportedE.
+// dropped on release). An aggregate crossing OUT to a script becomes a Berry list or map
+// instance (so a host record is readable as user['name']); reading a script's list/map
+// back IN is a v1 limit -> calogErrUnsupportedE.
 //
 // Lifetime note (as with Lua/JS): release every CalogFnT obtained from calogBerryExport
 // (and drop every function value marshalled out) BEFORE calogBerryDestroy, since the
diff --git a/src/s7/s7Adapter.c b/src/s7/s7Adapter.c
index cb0269f..3f6cb3c 100644
--- a/src/s7/s7Adapter.c
+++ b/src/s7/s7Adapter.c
@@ -5,9 +5,10 @@
 // "report" a), so the dispatcher recovers the name from its first argument and the
 // context from a hidden *calog-context* c-pointer, marshals the rest to CalogValueT, and
 // dispatches through calogCall (honoring the actor route hook). Marshalling covers
-// scalars, binary-safe strings, and Scheme lists (<-> aggregate list); the keyed part
-// of an aggregate (map) is a v1 limit. A Scheme procedure crossing out becomes a
-// refcounted CalogFnT kept alive by s7_gc_protect (released with s7_gc_unprotect_at).
+// scalars, binary-safe strings, and aggregates crossing out (a Scheme list, or a
+// hash-table when keyed, so a record reads as (user "name")); reading a script's keyed
+// value back in is a v1 limit. A Scheme procedure crossing out becomes a refcounted
+// CalogFnT kept alive by s7_gc_protect (released with s7_gc_unprotect_at).
 //
 // Error model: a native failure raises a Scheme error via s7_error. calogS7Run wraps the
 // source in (catch #t (lambda () (eval-string ...)) handler) so both read and run errors
@@ -281,17 +282,45 @@ static s7_pointer s7FromValue(CalogS7T *context, const CalogValueT *value, int32
             return s7_make_string_with_length(sc, value->as.s.bytes, (s7_int)value->as.s.length);
         case calogAggE: {
             CalogAggT *aggregate;
-            s7_pointer list;
             int64_t    index;
             aggregate = value->as.agg;
-            // The keyed part (map) is a v1 limit; the sequence becomes a Scheme list.
-            list = s7_nil(sc);
-            for (index = aggregate->arrayCount - 1; index >= 0; index--) {
-                s7_pointer element;
-                element = s7FromValue(context, &aggregate->array[index], depth + 1);
-                list    = s7_cons(sc, element, list);
+            // Anything keyed (or an explicit map) becomes a hash-table (applicable, so a
+            // script reads (user "name")) with the sequence part at integer keys; a pure
+            // sequence becomes a Scheme list.
+            if (aggregate->pairCount > 0 || aggregate->kind == calogMapE) {
+                s7_pointer table;
+                s7_int     size;
+                size  = (s7_int)(aggregate->arrayCount + aggregate->pairCount);
+                table = s7_make_hash_table(sc, size > 0 ? size : 1);
+                for (index = 0; index < aggregate->arrayCount; index++) {
+                    s7_hash_table_set(sc, table, s7_make_integer(sc, (s7_int)index),
+                                      s7FromValue(context, &aggregate->array[index], depth + 1));
+                }
+                for (index = 0; index < aggregate->pairCount; index++) {
+                    const CalogValueT *key;
+                    s7_pointer         keyObj;
+                    key = &aggregate->pairs[index].key;
+                    if (key->type == calogStringE) {
+                        keyObj = s7_make_string_with_length(sc, key->as.s.bytes, (s7_int)key->as.s.length);
+                    } else if (key->type == calogIntE) {
+                        keyObj = s7_make_integer(sc, (s7_int)key->as.i);
+                    } else {
+                        continue;   // non-scalar key: drop the pair
+                    }
+                    s7_hash_table_set(sc, table, keyObj,
+                                      s7FromValue(context, &aggregate->pairs[index].value, depth + 1));
+                }
+                return table;
+            } else {
+                s7_pointer list;
+                list = s7_nil(sc);
+                for (index = aggregate->arrayCount - 1; index >= 0; index--) {
+                    s7_pointer element;
+                    element = s7FromValue(context, &aggregate->array[index], depth + 1);
+                    list    = s7_cons(sc, element, list);
+                }
+                return list;
             }
-            return list;
         }
         case calogFnE:
             // Pushing a foreign function value into Scheme is a v1 limit.
diff --git a/src/s7/s7Adapter.h b/src/s7/s7Adapter.h
index 77e640e..2ad7d27 100644
--- a/src/s7/s7Adapter.h
+++ b/src/s7/s7Adapter.h
@@ -1,10 +1,11 @@
 // s7Adapter.h -- s7 Scheme engine adapter for the broker.
 //
 // Exposes broker-registered native functions into an s7 interpreter, marshals values
-// between Scheme and CalogValueT by value (binary-safe strings; scalars; Scheme list
-// <-> aggregate list), and exports Scheme procedures as refcounted CalogFnT handles
-// (kept alive by s7_gc_protect, released with s7_gc_unprotect_at). The keyed part of an
-// aggregate (map) is a v1 limit -> calogErrUnsupportedE.
+// between Scheme and CalogValueT by value (binary-safe strings; scalars; aggregates
+// cross OUT as a Scheme list, or a hash-table when keyed so a record reads as (user
+// "name")), and exports Scheme procedures as refcounted CalogFnT handles (kept alive by
+// s7_gc_protect, released with s7_gc_unprotect_at). Reading a script's keyed value (map)
+// back IN is a v1 limit -> calogErrUnsupportedE.
 //
 // Lifetime note (as with Lua/JS): release every CalogFnT obtained from calogS7Export
 // (and drop every procedure value marshalled out) BEFORE calogS7Destroy, since the
diff --git a/src/wren/wrenAdapter.c b/src/wren/wrenAdapter.c
index b4fadea..647e8c0 100644
--- a/src/wren/wrenAdapter.c
+++ b/src/wren/wrenAdapter.c
@@ -2,7 +2,7 @@
 //
 // Wren is class/method-oriented with no bare function calls, so all natives are reached
 // through a single foreign method: a preamble defines `class Calog { foreign static
-// call_(name, args) }`, and a script calls Calog.call_("report", [42]). The bound C
+// call(name, args) }`, and a script calls Calog.call("report", [42]). The bound C
 // dispatcher recovers the context from wrenGetUserData, marshals the argument list to
 // CalogValueT, and dispatches through calogCall (honoring the actor route hook). A Wren
 // function crossing out becomes a refcounted CalogFnT over a retained WrenHandle, invoked
@@ -52,7 +52,7 @@ static void                wrenFromValue(CalogWrenT *context, const CalogValueT
 static int32_t             wrenToValue(CalogWrenT *context, int slot, CalogValueT *out, int32_t depth);
 static void                wrenWrite(WrenVM *vm, const char *text);
 
-static const char WREN_PREAMBLE[] = "class Calog { foreign static call_(name, args) }";
+static const char WREN_PREAMBLE[] = "class Calog { foreign static call(name, args) }";
 
 
 int32_t calogWrenCreate(CalogWrenT **out, CalogT *broker, uint64_t ctxId) {
@@ -177,7 +177,7 @@ void calogWrenDestroy(CalogWrenT *context) {
 static WrenForeignMethodFn wrenBindMethod(WrenVM *vm, const char *module, const char *className, bool isStatic, const char *signature) {
     (void)vm;
     (void)module;
-    if (strcmp(className, "Calog") == 0 && isStatic && strcmp(signature, "call_(_,_)") == 0) {
+    if (strcmp(className, "Calog") == 0 && isStatic && strcmp(signature, "call(_,_)") == 0) {
         return wrenDispatch;
     }
     return NULL;
@@ -294,7 +294,7 @@ static int32_t wrenExportSlot(CalogWrenT *context, int slot, CalogFnT **out) {
 
 
 int32_t calogWrenExpose(CalogWrenT *context, const char *name) {
-    // Every native is reachable through Calog.call_(name, args); nothing per-name to do.
+    // Every native is reachable through Calog.call(name, args); nothing per-name to do.
     if (calogLookup(context->broker, name) == NULL) {
         return calogErrNotFoundE;
     }
@@ -331,11 +331,37 @@ static void wrenFromValue(CalogWrenT *context, const CalogValueT *value, int slo
             CalogAggT *aggregate;
             int64_t    index;
             aggregate = value->as.agg;
-            wrenSetSlotNewList(vm, slot);   // the keyed part (map) is a v1 limit
-            wrenEnsureSlots(vm, slot + 2);
-            for (index = 0; index < aggregate->arrayCount; index++) {
-                wrenFromValue(context, &aggregate->array[index], slot + 1, depth + 1);
-                wrenInsertInList(vm, slot, -1, slot + 1);
+            // Anything keyed (or an explicit map) becomes a Wren Map with the sequence
+            // part at numeric keys (a script reads user["name"]); a pure sequence
+            // becomes a Wren List. slot+1 = key scratch, slot+2 = value scratch.
+            if (aggregate->pairCount > 0 || aggregate->kind == calogMapE) {
+                wrenSetSlotNewMap(vm, slot);
+                wrenEnsureSlots(vm, slot + 3);
+                for (index = 0; index < aggregate->arrayCount; index++) {
+                    wrenSetSlotDouble(vm, slot + 1, (double)index);
+                    wrenFromValue(context, &aggregate->array[index], slot + 2, depth + 1);
+                    wrenSetMapValue(vm, slot, slot + 1, slot + 2);
+                }
+                for (index = 0; index < aggregate->pairCount; index++) {
+                    const CalogValueT *key;
+                    key = &aggregate->pairs[index].key;
+                    if (key->type == calogStringE) {
+                        wrenSetSlotBytes(vm, slot + 1, key->as.s.bytes, (size_t)key->as.s.length);
+                    } else if (key->type == calogIntE) {
+                        wrenSetSlotDouble(vm, slot + 1, (double)key->as.i);
+                    } else {
+                        continue;   // non-scalar key: drop the pair
+                    }
+                    wrenFromValue(context, &aggregate->pairs[index].value, slot + 2, depth + 1);
+                    wrenSetMapValue(vm, slot, slot + 1, slot + 2);
+                }
+            } else {
+                wrenSetSlotNewList(vm, slot);
+                wrenEnsureSlots(vm, slot + 2);
+                for (index = 0; index < aggregate->arrayCount; index++) {
+                    wrenFromValue(context, &aggregate->array[index], slot + 1, depth + 1);
+                    wrenInsertInList(vm, slot, -1, slot + 1);
+                }
             }
             return;
         }
@@ -426,7 +452,7 @@ static int32_t wrenToValue(CalogWrenT *context, int slot, CalogValueT *out, int3
             return calogOkE;
         }
         case WREN_TYPE_MAP:
-            return calogErrUnsupportedE;   // map read is a v1 limit
+            return calogErrUnsupportedE;   // map read is a v1 limit (no key enumeration in the C API)
         case WREN_TYPE_FOREIGN:
         case WREN_TYPE_UNKNOWN: {
             // A non-primitive (typically a Fn) is captured as a callable.
diff --git a/src/wren/wrenAdapter.h b/src/wren/wrenAdapter.h
index 3b3d174..b78e7a8 100644
--- a/src/wren/wrenAdapter.h
+++ b/src/wren/wrenAdapter.h
@@ -1,11 +1,12 @@
 // wrenAdapter.h -- Wren engine adapter for the broker.
 //
 // Wren has no bare function calls, so natives are reached through one foreign method:
-// scripts call Calog.call_("name", [args]). The adapter marshals values between Wren and
-// CalogValueT by value (binary-safe strings; scalars; Wren list <-> aggregate list) and
-// exports Wren functions as refcounted CalogFnT handles (a retained WrenHandle, released
-// with wrenReleaseHandle). Numbers are IEEE doubles, so int64 magnitudes above 2^53 lose
-// precision. The keyed part of an aggregate (map) is a v1 limit.
+// scripts call Calog.call("name", [args]). The adapter marshals values between Wren and
+// CalogValueT by value (binary-safe strings; scalars; an aggregate crosses OUT as a Wren
+// List, or a Map when keyed so a record reads as user["name"]) and exports Wren functions
+// as refcounted CalogFnT handles (a retained WrenHandle, released with wrenReleaseHandle).
+// Numbers are IEEE doubles, so int64 magnitudes above 2^53 lose precision. Reading a
+// script's list/map back IN is a v1 limit (Wren's C API cannot enumerate a Map's keys).
 //
 // Lifetime note (as with Lua/JS): release every CalogFnT obtained from calogWrenExport
 // (and drop every function value marshalled out) BEFORE calogWrenDestroy, since the
diff --git a/tests/testEngineBerry.c b/tests/testEngineBerry.c
index 8743197..d01e05d 100644
--- a/tests/testEngineBerry.c
+++ b/tests/testEngineBerry.c
@@ -26,20 +26,25 @@ static _Atomic bool     scriptDone    = false;
 static _Atomic int32_t  errorCount    = 0;
 static _Atomic uint64_t errorCtxId    = 0;
 static CalogFnT *_Atomic storedCb      = NULL;
+static char              storedName[32] = { 0 };
+static _Atomic int32_t   nameLen        = -1;
 static int32_t          testsRun      = 0;
 static int32_t          testsFailed   = 0;
 
 static void    checkImpl(bool condition, const char *message, const char *file, int32_t line);
 static int32_t nativeBump(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeDone(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
+static int32_t nativeMakeUser(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeReport(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeReportInline(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
+static int32_t nativeReportName(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeSetCb(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static void    onError(uint64_t contextId, const char *message, void *userData);
 static void    pumpUntilDone(void);
 static void    testConcurrentContexts(void);
 static void    testCrossThreadCallback(void);
 static void    testHostAndInlineNatives(void);
+static void    testMaterializedRecord(void);
 static void    testScriptError(void);
 
 
@@ -72,6 +77,31 @@ static int32_t nativeDone(CalogValueT *args, int32_t argCount, CalogValueT *resu
 }
 
 
+static int32_t nativeMakeUser(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
+    CalogAggT  *user;
+    CalogValueT key;
+    CalogValueT val;
+    int32_t     status;
+
+    (void)args;
+    (void)argCount;
+    (void)userData;
+    calogValueNil(result);
+    status = calogAggCreate(&user, calogMapE);
+    if (status != calogOkE) {
+        return calogFail(result, status, "makeUser could not allocate");
+    }
+    calogValueString(&key, "name", 4);
+    calogValueString(&val, "ada", 3);
+    calogAggSet(user, &key, &val);
+    calogValueString(&key, "age", 3);
+    calogValueInt(&val, 36);
+    calogAggSet(user, &key, &val);
+    calogValueAgg(result, user);
+    return calogOkE;
+}
+
+
 static int32_t nativeReport(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
     (void)userData;
     calogValueNil(result);
@@ -94,6 +124,25 @@ static int32_t nativeReportInline(CalogValueT *args, int32_t argCount, CalogValu
 }
 
 
+static int32_t nativeReportName(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
+    size_t length;
+
+    (void)userData;
+    calogValueNil(result);
+    if (argCount != 1 || args[0].type != calogStringE) {
+        return calogFail(result, calogErrArgE, "reportName expects one string");
+    }
+    length = (size_t)args[0].as.s.length;
+    if (length >= sizeof(storedName)) {
+        length = sizeof(storedName) - 1;
+    }
+    memcpy(storedName, args[0].as.s.bytes, length);
+    storedName[length] = '\0';
+    atomic_store(&nameLen, (int32_t)length);
+    return calogOkE;
+}
+
+
 static int32_t nativeSetCb(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
     (void)userData;
     calogValueNil(result);
@@ -149,6 +198,23 @@ static void testHostAndInlineNatives(void) {
 }
 
 
+static void testMaterializedRecord(void) {
+    CalogContextT *ctx;
+
+    ctx = calogContextOpen(calog, &calogBerryEngine);
+    atomic_store(&scriptDone, false);
+    atomic_store(&nameLen, -1);
+    atomic_store(&reportedValue, 0);
+    calogContextEval(ctx, "u = makeUser()\nreport(u['age'])\nreportName(u['name'])\ndone()");
+    pumpUntilDone();
+
+    CHECK(atomic_load(&reportedValue) == 36, "read an int field from a materialized record map");
+    CHECK(atomic_load(&nameLen) == 3 && memcmp(storedName, "ada", 3) == 0, "read a string field from a materialized record map");
+
+    calogContextClose(ctx);
+}
+
+
 static void testCrossThreadCallback(void) {
     CalogContextT *ctx;
     CalogFnT      *callback;
@@ -225,9 +291,12 @@ int main(void) {
     calogRegister(calog, "setCb", nativeSetCb, NULL);
     calogRegister(calog, "done", nativeDone, NULL);
     calogRegister(calog, "bump", nativeBump, NULL);
+    calogRegister(calog, "makeUser", nativeMakeUser, NULL);
+    calogRegister(calog, "reportName", nativeReportName, NULL);
     calogRegisterInline(calog, "reportInline", nativeReportInline, NULL);
 
     testHostAndInlineNatives();
+    testMaterializedRecord();
     testCrossThreadCallback();
     testScriptError();
     testConcurrentContexts();
diff --git a/tests/testEngineS7.c b/tests/testEngineS7.c
index 096128e..0df17a6 100644
--- a/tests/testEngineS7.c
+++ b/tests/testEngineS7.c
@@ -35,20 +35,25 @@ static _Atomic bool     scriptDone    = false;
 static _Atomic int32_t  errorCount    = 0;
 static _Atomic uint64_t errorCtxId    = 0;
 static CalogFnT *_Atomic storedCb      = NULL;
+static char              storedName[32] = { 0 };
+static _Atomic int32_t   nameLen        = -1;
 static int32_t          testsRun      = 0;
 static int32_t          testsFailed   = 0;
 
 static void    checkImpl(bool condition, const char *message, const char *file, int32_t line);
 static int32_t nativeBump(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeDone(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
+static int32_t nativeMakeUser(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeReport(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeReportInline(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
+static int32_t nativeReportName(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeSetCb(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static void    onError(uint64_t contextId, const char *message, void *userData);
 static void    pumpUntilDone(void);
 static void    testConcurrentContexts(void);
 static void    testCrossThreadCallback(void);
 static void    testHostAndInlineNatives(void);
+static void    testMaterializedRecord(void);
 static void    testScriptError(void);
 
 
@@ -81,6 +86,31 @@ static int32_t nativeDone(CalogValueT *args, int32_t argCount, CalogValueT *resu
 }
 
 
+static int32_t nativeMakeUser(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
+    CalogAggT  *user;
+    CalogValueT key;
+    CalogValueT val;
+    int32_t     status;
+
+    (void)args;
+    (void)argCount;
+    (void)userData;
+    calogValueNil(result);
+    status = calogAggCreate(&user, calogMapE);
+    if (status != calogOkE) {
+        return calogFail(result, status, "makeUser could not allocate");
+    }
+    calogValueString(&key, "name", 4);
+    calogValueString(&val, "ada", 3);
+    calogAggSet(user, &key, &val);
+    calogValueString(&key, "age", 3);
+    calogValueInt(&val, 36);
+    calogAggSet(user, &key, &val);
+    calogValueAgg(result, user);
+    return calogOkE;
+}
+
+
 static int32_t nativeReport(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
     (void)userData;
     calogValueNil(result);
@@ -103,6 +133,25 @@ static int32_t nativeReportInline(CalogValueT *args, int32_t argCount, CalogValu
 }
 
 
+static int32_t nativeReportName(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
+    size_t length;
+
+    (void)userData;
+    calogValueNil(result);
+    if (argCount != 1 || args[0].type != calogStringE) {
+        return calogFail(result, calogErrArgE, "reportName expects one string");
+    }
+    length = (size_t)args[0].as.s.length;
+    if (length >= sizeof(storedName)) {
+        length = sizeof(storedName) - 1;
+    }
+    memcpy(storedName, args[0].as.s.bytes, length);
+    storedName[length] = '\0';
+    atomic_store(&nameLen, (int32_t)length);
+    return calogOkE;
+}
+
+
 static int32_t nativeSetCb(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
     (void)userData;
     calogValueNil(result);
@@ -158,6 +207,23 @@ static void testHostAndInlineNatives(void) {
 }
 
 
+static void testMaterializedRecord(void) {
+    CalogContextT *ctx;
+
+    ctx = calogContextOpen(calog, &calogS7Engine);
+    atomic_store(&scriptDone, false);
+    atomic_store(&nameLen, -1);
+    atomic_store(&reportedValue, 0);
+    calogContextEval(ctx, "(begin (define u (makeUser)) (report (u \"age\")) (reportName (u \"name\")) (done))");
+    pumpUntilDone();
+
+    CHECK(atomic_load(&reportedValue) == 36, "read an int field from a materialized record map");
+    CHECK(atomic_load(&nameLen) == 3 && memcmp(storedName, "ada", 3) == 0, "read a string field from a materialized record map");
+
+    calogContextClose(ctx);
+}
+
+
 static void testCrossThreadCallback(void) {
     CalogContextT *ctx;
     CalogFnT      *callback;
@@ -234,9 +300,12 @@ int main(void) {
     calogRegister(calog, "setCb", nativeSetCb, NULL);
     calogRegister(calog, "done", nativeDone, NULL);
     calogRegister(calog, "bump", nativeBump, NULL);
+    calogRegister(calog, "makeUser", nativeMakeUser, NULL);
+    calogRegister(calog, "reportName", nativeReportName, NULL);
     calogRegisterInline(calog, "reportInline", nativeReportInline, NULL);
 
     testHostAndInlineNatives();
+    testMaterializedRecord();
     testCrossThreadCallback();
     testScriptError();
     testConcurrentContexts();
diff --git a/tests/testEngineWren.c b/tests/testEngineWren.c
index 4969433..8a8ac09 100644
--- a/tests/testEngineWren.c
+++ b/tests/testEngineWren.c
@@ -26,20 +26,25 @@ static _Atomic bool     scriptDone    = false;
 static _Atomic int32_t  errorCount    = 0;
 static _Atomic uint64_t errorCtxId    = 0;
 static CalogFnT *_Atomic storedCb      = NULL;
+static char              storedName[32] = { 0 };
+static _Atomic int32_t   nameLen        = -1;
 static int32_t          testsRun      = 0;
 static int32_t          testsFailed   = 0;
 
 static void    checkImpl(bool condition, const char *message, const char *file, int32_t line);
 static int32_t nativeBump(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeDone(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
+static int32_t nativeMakeUser(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeReport(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeReportInline(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
+static int32_t nativeReportName(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static int32_t nativeSetCb(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData);
 static void    onError(uint64_t contextId, const char *message, void *userData);
 static void    pumpUntilDone(void);
 static void    testConcurrentContexts(void);
 static void    testCrossThreadCallback(void);
 static void    testHostAndInlineNatives(void);
+static void    testMaterializedRecord(void);
 static void    testScriptError(void);
 
 
@@ -72,6 +77,31 @@ static int32_t nativeDone(CalogValueT *args, int32_t argCount, CalogValueT *resu
 }
 
 
+static int32_t nativeMakeUser(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
+    CalogAggT  *user;
+    CalogValueT key;
+    CalogValueT val;
+    int32_t     status;
+
+    (void)args;
+    (void)argCount;
+    (void)userData;
+    calogValueNil(result);
+    status = calogAggCreate(&user, calogMapE);
+    if (status != calogOkE) {
+        return calogFail(result, status, "makeUser could not allocate");
+    }
+    calogValueString(&key, "name", 4);
+    calogValueString(&val, "ada", 3);
+    calogAggSet(user, &key, &val);
+    calogValueString(&key, "age", 3);
+    calogValueInt(&val, 36);
+    calogAggSet(user, &key, &val);
+    calogValueAgg(result, user);
+    return calogOkE;
+}
+
+
 static int32_t nativeReport(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
     (void)userData;
     calogValueNil(result);
@@ -94,6 +124,25 @@ static int32_t nativeReportInline(CalogValueT *args, int32_t argCount, CalogValu
 }
 
 
+static int32_t nativeReportName(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
+    size_t length;
+
+    (void)userData;
+    calogValueNil(result);
+    if (argCount != 1 || args[0].type != calogStringE) {
+        return calogFail(result, calogErrArgE, "reportName expects one string");
+    }
+    length = (size_t)args[0].as.s.length;
+    if (length >= sizeof(storedName)) {
+        length = sizeof(storedName) - 1;
+    }
+    memcpy(storedName, args[0].as.s.bytes, length);
+    storedName[length] = '\0';
+    atomic_store(&nameLen, (int32_t)length);
+    return calogOkE;
+}
+
+
 static int32_t nativeSetCb(CalogValueT *args, int32_t argCount, CalogValueT *result, void *userData) {
     (void)userData;
     calogValueNil(result);
@@ -138,7 +187,7 @@ static void testHostAndInlineNatives(void) {
     CHECK(ctx != NULL, "opened a Wren context");
 
     atomic_store(&scriptDone, false);
-    calogContextEval(ctx, "Calog.call_(\"report\", [42])\nCalog.call_(\"reportInline\", [1])\nCalog.call_(\"done\", [])");
+    calogContextEval(ctx, "Calog.call(\"report\", [42])\nCalog.call(\"reportInline\", [1])\nCalog.call(\"done\", [])");
     pumpUntilDone();
 
     CHECK(atomic_load(&reportedValue) == 42, "host native received the argument");
@@ -149,6 +198,23 @@ static void testHostAndInlineNatives(void) {
 }
 
 
+static void testMaterializedRecord(void) {
+    CalogContextT *ctx;
+
+    ctx = calogContextOpen(calog, &calogWrenEngine);
+    atomic_store(&scriptDone, false);
+    atomic_store(&nameLen, -1);
+    atomic_store(&reportedValue, 0);
+    calogContextEval(ctx, "var u = Calog.call(\"makeUser\", [])\nCalog.call(\"report\", [u[\"age\"]])\nCalog.call(\"reportName\", [u[\"name\"]])\nCalog.call(\"done\", [])");
+    pumpUntilDone();
+
+    CHECK(atomic_load(&reportedValue) == 36, "read an int field from a materialized record map");
+    CHECK(atomic_load(&nameLen) == 3 && memcmp(storedName, "ada", 3) == 0, "read a string field from a materialized record map");
+
+    calogContextClose(ctx);
+}
+
+
 static void testCrossThreadCallback(void) {
     CalogContextT *ctx;
     CalogFnT      *callback;
@@ -159,7 +225,7 @@ static void testCrossThreadCallback(void) {
     ctx = calogContextOpen(calog, &calogWrenEngine);
     atomic_store(&scriptDone, false);
     atomic_store(&storedCb, NULL);
-    calogContextEval(ctx, "Calog.call_(\"setCb\", [Fn.new {|x| x + 100 }])\nCalog.call_(\"done\", [])");
+    calogContextEval(ctx, "Calog.call(\"setCb\", [Fn.new {|x| x + 100 }])\nCalog.call(\"done\", [])");
     pumpUntilDone();
 
     callback = atomic_load(&storedCb);
@@ -201,7 +267,7 @@ static void testConcurrentContexts(void) {
     atomic_store(&bumpCount, 0);
     for (i = 0; i < 3; i++) {
         ctxs[i] = calogContextOpen(calog, &calogWrenEngine);
-        calogContextEval(ctxs[i], "Calog.call_(\"bump\", [])\nCalog.call_(\"bump\", [])\nCalog.call_(\"bump\", [])");
+        calogContextEval(ctxs[i], "Calog.call(\"bump\", [])\nCalog.call(\"bump\", [])\nCalog.call(\"bump\", [])");
     }
     for (i = 0; i < PUMP_LIMIT && atomic_load(&bumpCount) < 9; i++) {
         calogPump(calog);
@@ -225,9 +291,12 @@ int main(void) {
     calogRegister(calog, "setCb", nativeSetCb, NULL);
     calogRegister(calog, "done", nativeDone, NULL);
     calogRegister(calog, "bump", nativeBump, NULL);
+    calogRegister(calog, "makeUser", nativeMakeUser, NULL);
+    calogRegister(calog, "reportName", nativeReportName, NULL);
     calogRegisterInline(calog, "reportInline", nativeReportInline, NULL);
 
     testHostAndInlineNatives();
+    testMaterializedRecord();
     testCrossThreadCallback();
     testScriptError();
     testConcurrentContexts();
diff --git a/tests/testLoad.c b/tests/testLoad.c
index db23116..591e4de 100644
--- a/tests/testLoad.c
+++ b/tests/testLoad.c
@@ -111,7 +111,7 @@ int main(void) {
     CHECK(loadAndRun("clTest") == 15, "loaded and ran a .scm Scheme script by base name");
     remove("clTest.scm");
 
-    writeScript("clTest.wren", "Calog.call_(\"hit\", [16])");
+    writeScript("clTest.wren", "Calog.call(\"hit\", [16])");
     CHECK(loadAndRun("clTest") == 16, "loaded and ran a .wren script by base name");
     remove("clTest.wren");