charlielye · Oct 16, 2026 · Oct 16, 2026 · Oct 18, 2026 · Oct 20, 2026 · Oct 20, 2026
@@ -51,7 +51,7 @@ body:
     attributes:
       label: Node Version
       description: Your Node.js version
-      placeholder: e.g. 24.15.0
+      placeholder: e.g. 26.12.0
   - type: textarea
     id: additional-context
     attributes:

@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        branch: ${{ fromJSON('["next", "v5-next"]') }}
+        branch: ${{ fromJSON('["next", "v5-next", "v6"]') }}
     concurrency:
       group: ${{ github.workflow }}-${{ github.repository }}-${{ matrix.branch }}
     steps:

diff --git a/.nvmrc b/.nvmrc
@@ -1 +1 @@
-v24.15.0
+v26.12.0
diff --git a/Makefile b/Makefile
@@ -263,7 +263,7 @@ bb-ts-cross-copy: bb-ts bb-cpp-cross
 # the same barretenberg/ts node_modules. bb-ts additionally emits the bb.js test commands,
 # which the test engine runs concurrently with the rest of the build out of that same tree,
 # so an unordered npm_install_deps here swaps files under a running node (SIGBUS).
-bb-avm-sim: ipc-codegen ipc-runtime bb-cpp-native bb-ts
+bb-avm-sim: ipc-codegen ipc-runtime bb-cpp-native bb-cpp-wasm bb-ts
 	$(call build,$@,barretenberg/ts,build_bb_avm_sim)
 
 # Ordered after bb-cdb (and after bb-ts-cross-copy, which builds bb.js-api's cross copies)
@@ -312,6 +312,9 @@ bb-sol: bb-cpp-native bb-crs l1-contracts-solc
 bb-cpp-native-tests: bb-cpp-native bb-cpp-chonk-inputs
 	$(call test,$@,barretenberg/cpp,native)
 
+bb-cpp-wasm-tests: bb-cpp-wasm
+	$(call test,$@,barretenberg/cpp,wasm)
+
 bb-cpp-wasm-threads-tests: bb-cpp-wasm-threads
 	$(call test,$@,barretenberg/cpp,wasm_threads)
 
@@ -327,6 +330,11 @@ bb-acir-tests: bb-acir
 bb-ts-tests: bb-ts
 	$(call test,$@,barretenberg/ts)
 
+# After bb-cdb, the last of the barretenberg/ts targets to install into node_modules, which the
+# tests run out of.
+bb-avm-sim-tests: bb-avm-sim bb-cdb
+	$(call test,$@,barretenberg/ts,bb_avm_sim)
+
 bb-sol-tests: bb-sol
 	$(call test,$@,barretenberg/sol)
 
@@ -339,7 +347,7 @@ bb-bbup-tests: bb-bbup
 bb-rs-tests: bb-rs
 	$(call test,$@,barretenberg/rust)
 
-bb-tests: bb-cpp-native-tests bb-acir-tests bb-ts-tests bb-sol-tests bb-bbup-tests bb-docs-tests bb-rs-tests
+bb-tests: bb-cpp-native-tests bb-cpp-wasm-tests bb-acir-tests bb-ts-tests bb-avm-sim-tests bb-sol-tests bb-bbup-tests bb-docs-tests bb-rs-tests
 
 bb-full-tests: bb-cpp-wasm-threads-tests bb-cpp-asan-tests bb-cpp-smt-tests
 

diff --git a/avm-transpiler/Cargo.lock b/avm-transpiler/Cargo.lock
@@ -131,7 +131,7 @@ HARDWARE_CONCURRENCY=8 BB_BENCH=1 \
 ```
 
 The wasmtime wrapper sets:
-- `-Wthreads=y -Sthreads=y` — enable WASM threads and shared memory
+- `-Wthreads=y -Wshared-memory=y -Wexceptions=y -Sthreads=y` — enable WASM threads, shared memory and exception handling
 - `--env HARDWARE_CONCURRENCY` — thread count
 - `--env BB_BENCH` — enable operation counting (requires configuring with `-DENABLE_WASM_BENCH=ON`; it is OFF by default in the `wasm-threads` preset to keep the shipped wasm fast)
 - `--dir=$HOME/.bb-crs --dir=.` — filesystem access for CRS and working directory

@@ -138,7 +138,7 @@ ssh $BB_SSH_KEY $BB_SSH_INSTANCE "
   cd $REMOTE_DIR
   HARDWARE_CONCURRENCY=$HARDWARE_CONCURRENCY \
   /home/ubuntu/.wasmtime/bin/wasmtime run \
-    -Wthreads=y -Sthreads=y -Wshared-memory=y \
+    -Wthreads=y -Wexceptions=y -Sthreads=y -Wshared-memory=y \
     --env HARDWARE_CONCURRENCY --env HOME --env BB_BENCH=1 \
     --dir=\$HOME/.bb-crs --dir=. \
     ./bin/bb prove \

@@ -203,7 +203,7 @@ ssh $BB_SSH_KEY $BB_SSH_INSTANCE \
   "cd $BB_SSH_CPP_PATH/build-wasm-threads && \
    HARDWARE_CONCURRENCY=16 \
    /home/ubuntu/.wasmtime/bin/wasmtime run \
-     -Wthreads=y -Sthreads=y \
+     -Wthreads=y -Wshared-memory=y -Wexceptions=y -Sthreads=y \
      --env HARDWARE_CONCURRENCY \
      --env HOME \
      --env BB_BENCH=1 \

@@ -10,7 +10,7 @@
   "dependencies": {
     "chalk": "^5.3.0",
     "commander": "^12.1.0",
-    "playwright": "1.49.0",
+    "playwright": "1.63.0",
     "puppeteer": "^24.22.3"
   },
   "devDependencies": {

@@ -2514,16 +2514,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"fsevents@npm:2.3.2":
-  version: 2.3.2
-  resolution: "fsevents@npm:2.3.2"
-  dependencies:
-    node-gyp: "npm:latest"
-  checksum: 10c0/be78a3efa3e181cda3cf7a4637cb527bcebb0bd0ea0440105a3bb45b86f9245b307dc10a2507e8f4498a7d4ec349d1910f4d73e4d4495b16103106e07eee735b
-  conditions: os=darwin
-  languageName: node
-  linkType: hard
-
 "fsevents@npm:~2.3.2":
   version: 2.3.3
   resolution: "fsevents@npm:2.3.3"
@@ -2534,15 +2524,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"fsevents@patch:fsevents@npm%3A2.3.2#optional!builtin<compat/fsevents>":
-  version: 2.3.2
-  resolution: "fsevents@patch:fsevents@npm%3A2.3.2#optional!builtin<compat/fsevents>::version=2.3.2&hash=df0bf1"
-  dependencies:
-    node-gyp: "npm:latest"
-  conditions: os=darwin
-  languageName: node
-  linkType: hard
-
 "fsevents@patch:fsevents@npm%3A~2.3.2#optional!builtin<compat/fsevents>":
   version: 2.3.3
   resolution: "fsevents@patch:fsevents@npm%3A2.3.3#optional!builtin<compat/fsevents>::version=2.3.3&hash=df0bf1"
@@ -2723,7 +2704,7 @@ __metadata:
   dependencies:
     chalk: "npm:^5.3.0"
     commander: "npm:^12.1.0"
-    playwright: "npm:1.49.0"
+    playwright: "npm:1.63.0"
     puppeteer: "npm:^24.22.3"
     ts-node: "npm:^10.9.2"
     typescript: "npm:^5.4.2"
@@ -4145,27 +4126,23 @@ __metadata:
   languageName: node
   linkType: hard
 
-"playwright-core@npm:1.49.0":
-  version: 1.49.0
-  resolution: "playwright-core@npm:1.49.0"
+"playwright-core@npm:1.63.0":
+  version: 1.63.0
+  resolution: "playwright-core@npm:1.63.0"
   bin:
     playwright-core: cli.js
-  checksum: 10c0/22c1a72fabdcc87bd1cd4d40a032d2c5b94cf94ba7484dc182048c3fa1c8ec26180b559d8cac4ca9870e8fd6bdf5ef9d9f54e7a31fd60d67d098fcffc5e4253b
+  checksum: 10c0/39c1ebae4029ca2e9371e00a5588d962038e24b6e0bdb7d0d27374dde04838f349b83ae0c8b3b648653d0935cba7fb9011f1201adaab9dd0db7801ad6c75e9aa
   languageName: node
   linkType: hard
 
-"playwright@npm:1.49.0":
-  version: 1.49.0
-  resolution: "playwright@npm:1.49.0"
+"playwright@npm:1.63.0":
+  version: 1.63.0
+  resolution: "playwright@npm:1.63.0"
   dependencies:
-    fsevents: "npm:2.3.2"
-    playwright-core: "npm:1.49.0"
-  dependenciesMeta:
-    fsevents:
-      optional: true
+    playwright-core: "npm:1.63.0"
   bin:
     playwright: cli.js
-  checksum: 10c0/e94d662747cd147d0573570fec90dadc013c1097595714036fc8934a075c5a82ab04a49111b03b1f762ea86429bdb7c94460901896901e20970b30ce817cc93f
+  checksum: 10c0/d1fd048a89be27c9aba6757dc4f70eff4a5163b49f439ad691767be8b2a482327d0dd1928b4f73c8fe0d8b33aab2c9dc2670424ab60f112d9e98e91b94e3b090
   languageName: node
   linkType: hard
 

@@ -89,7 +89,7 @@ clang-format-20 -i <files>
 These are load-bearing: violating them will compile on native but break WASM, or skew test output in CI. Use the listed alternative unconditionally.
 
 - **Logging: use `info(...)` / `vinfo(...)` from `barretenberg/common/log.hpp`, never `std::cout` or `std::cerr`.** The macros route through `log_function` and respect `bb_log_level`; direct `std::cout` is unfiltered, uncaptured in CI logs, and skews benchmark output.
-- **Aborts and exceptions: use `throw_or_abort(msg)` from `barretenberg/common/throw_or_abort.hpp`, never bare `throw` or `std::abort()`.** WASM builds set `BB_NO_EXCEPTIONS`, which turns `throw` into `abort()` — bare `throw` compiles differently and misformats the message, and raw `std::abort()` drops the message entirely. For header-only libraries that must use exception syntax, use the `THROW`/`RETHROW` macros from `common/try_catch_shim.hpp`.
+- **Aborts and exceptions: use `throw_or_abort(msg)` from `barretenberg/common/throw_or_abort.hpp`, never bare `throw` or `std::abort()`.** Builds that set `BB_NO_EXCEPTIONS` (the `clang20-no-exceptions` preset; WASM builds now use wasm exception handling) turn `throw_or_abort` into `abort()`, and raw `std::abort()` drops the message entirely. For header-only libraries that must use exception syntax, use the `THROW`/`RETHROW` macros from `common/try_catch_shim.hpp`.
 - **Assertions: use `BB_ASSERT(cond, msg)` / `BB_ASSERT_EQ` / `BB_ASSERT_NEQ` / `BB_ASSERT_GT` / etc. from `barretenberg/common/assert.hpp`, never bare `assert(...)`.** `BB_ASSERT` hooks into the benchmark-assertion framework and has distinct debug/release behavior; `assert` is stripped in release builds and silently diverges in WASM.
 - **Release builds: do not reach for the `release` CMake preset unless the user is reproducing a performance issue.** Debug/default presets are much faster to compile and sufficient for correctness work.
 

@@ -422,7 +422,7 @@
         "CMAKE_C_COMPILER_WORKS": "ON",
         "CMAKE_CXX_COMPILER_WORKS": "ON",
         "MULTITHREADING": "OFF",
-        "CMAKE_CXX_FLAGS": "-DBB_NO_EXCEPTIONS"
+        "AVM": "OFF"
       }
     },
     {
@@ -768,7 +768,9 @@
       "targets": [
         "barretenberg.wasm",
         "barretenberg.wasm.gz",
-        "barretenberg-debug.wasm"
+        "barretenberg-debug.wasm",
+        "bb-avm-sim.wasm",
+        "avm_ffi_tests"
       ]
     },
     {

@@ -358,6 +358,11 @@ function test_cmds_wasm_threads {
   echo "$hash:CPUS=8 HARDWARE_CONCURRENCY=8 barretenberg/cpp/scripts/wasmtime.sh barretenberg/cpp/build-wasm-threads/bin/ecc_tests"
 }
 
+function test_cmds_wasm {
+  # The AVM simulator's in-process service, from the single-threaded build bb-avm-sim.wasm comes from.
+  echo "$hash SINGLE_THREADED=1 barretenberg/cpp/scripts/wasmtime.sh barretenberg/cpp/build-wasm/bin/avm_ffi_tests"
+}
+
 function test_cmds_asan {
   local prefix="$hash:CPUS=4:MEM=8g"
 
@@ -395,6 +400,7 @@ function test_cmds_nightly {
 function test_cmds {
   if [ -z "${1:-}" ]; then
     test_cmds_native
+    test_cmds_wasm
     if [ "$CI_FULL" -eq 1 ]; then
       test_cmds_wasm_threads
       test_cmds_asan