diff --git a/.github/workflows/build-misc.yml b/.github/workflows/build-misc.yml
index e1a28bcc..a8e2d8fa 100644
--- a/.github/workflows/build-misc.yml
+++ b/.github/workflows/build-misc.yml
@@ -43,9 +43,6 @@ jobs:
           rustup show
           rustup +nightly show
 
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none || true
-
       - name: Build
         env:
           BIZINIKIWI_RUNTIME_TARGET: riscv
diff --git a/.github/workflows/build-publish-images.yml b/.github/workflows/build-publish-images.yml
index ee4761c7..a8c2a086 100644
--- a/.github/workflows/build-publish-images.yml
+++ b/.github/workflows/build-publish-images.yml
@@ -28,15 +28,12 @@ jobs:
     uses: ./.github/workflows/reusable-preflight.yml
 
   ### Build ########################
-  # TEMPORARILY DISABLED: All build jobs require WASM but serde_core + Rust 1.88 + wasm32 bug prevents WASM build
-  # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
 
   #
   #
   #
   build-linux-stable:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -51,9 +48,6 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Configure git safe.directory
         run: git config --global --add safe.directory '*'
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
       - name: build
         id: required
         run: |
@@ -98,7 +92,6 @@ jobs:
   #
   build-linux-stable-pezcumulus:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -108,8 +101,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: build
         id: required
         run: |
@@ -135,7 +126,6 @@ jobs:
   #
   build-test-teyrchain:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -145,8 +135,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: build
         id: required
         run: |
@@ -176,7 +164,6 @@ jobs:
   #
   build-test-collators:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -184,8 +171,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: build
         id: required
         run: |
@@ -216,7 +201,6 @@ jobs:
   #
   build-malus:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -224,8 +208,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: build
         id: required
         run: |
@@ -255,7 +237,6 @@ jobs:
   #
   build-linux-bizinikiwi:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -265,8 +246,6 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Configure git safe.directory
         run: git config --global --add safe.directory '*'
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: build
         id: required
         run: |
@@ -301,7 +280,6 @@ jobs:
   #
   build-templates-node:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -309,8 +287,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: build
         id: required
         run: |
@@ -340,15 +316,11 @@ jobs:
 
   ### Build zombienet test artifacts ########################
 
-  # TEMPORARILY DISABLED: wasm32v1-none target causes serde_core + Rust 1.88 bug
-  # Also bridges/testing directory doesn't exist in the repo
-  # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
   #
   #
   #
   prepare-bridges-zombienet-artifacts:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -356,8 +328,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none
       - name: build
         run: |
           cargo build --locked --profile testnet -p pezkuwi-test-malus --bin malus --bin pezkuwi-prepare-worker --bin pezkuwi-execute-worker
@@ -376,14 +346,11 @@ jobs:
           path: artifacts.tar
           retention-days: 1
 
-  # TEMPORARILY DISABLED: wasm32v1-none target causes serde_core + Rust 1.88 bug
-  # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
   #
   #
   #
   prepare-pezkuwi-zombienet-artifacts:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -391,8 +358,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none
       - name: build
         run: |
           cargo nextest --manifest-path pezkuwi/zombienet-sdk-tests/Cargo.toml archive --locked --features zombie-metadata,zombie-ci --archive-file pezkuwi-zombienet-tests.tar.zst
@@ -411,14 +376,11 @@ jobs:
           path: artifacts.tar
           retention-days: 1
 
-  # TEMPORARILY DISABLED: wasm32v1-none target causes serde_core + Rust 1.88 bug
-  # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
   #
   #
   #
   prepare-pezcumulus-zombienet-artifacts:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -426,8 +388,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none
       - name: build
         run: |
           cargo nextest --manifest-path pezcumulus/zombienet/zombienet-sdk/Cargo.toml archive --locked --features zombie-ci --archive-file pezcumulus-zombienet-tests.tar.zst
@@ -446,11 +406,8 @@ jobs:
           path: artifacts.tar
           retention-days: 1
 
-  # TEMPORARILY DISABLED: wasm32v1-none target causes serde_core + Rust 1.88 bug
-  # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
   prepare-teyrchain-templates-zombienet-artifacts:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 60
     container:
@@ -458,8 +415,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none
       - name: build
         run: |
           cargo nextest --manifest-path templates/zombienet/Cargo.toml archive --locked --features zombienet --archive-file teyrchain-templates-zombienet-tests.tar.zst
@@ -699,7 +654,7 @@ jobs:
       - build-malus
       - build-linux-bizinikiwi
       - build-templates-node
-    if: false  # Disabled until serde_core upstream fix - all build jobs are disabled
+    if: always() && !cancelled()
     outputs:
       build_success: ${{ steps.check_success.outputs.build_success }}
     steps:
@@ -719,7 +674,6 @@ jobs:
 
   trigger-zombienet-pezkuwi:
     needs: [preflight, confirm-required-build-jobs-passed]
-    if: false  # Disabled until serde_core upstream fix
     uses: ./.github/workflows/zombienet_pezkuwi.yml
     with:
       build_run_id: ${{ github.run_id }}
@@ -727,7 +681,6 @@ jobs:
 
   trigger-zombienet-pezcumulus:
     needs: [preflight, confirm-required-build-jobs-passed]
-    if: false  # Disabled until serde_core upstream fix
     uses: ./.github/workflows/zombienet_pezcumulus.yml
     with:
       build_run_id: ${{ github.run_id }}
@@ -735,7 +688,6 @@ jobs:
 
   trigger-zombienet-bizinikiwi:
     needs: [preflight, confirm-required-build-jobs-passed]
-    if: false  # Disabled until serde_core upstream fix
     uses: ./.github/workflows/zombienet_bizinikiwi.yml
     with:
       build_run_id: ${{ github.run_id }}
@@ -743,7 +695,6 @@ jobs:
 
   trigger-zombienet-teyrchain-template:
     needs: [preflight, confirm-required-build-jobs-passed]
-    if: false  # Disabled until serde_core upstream fix
     uses: ./.github/workflows/zombienet_teyrchain-template.yml
     with:
       build_run_id: ${{ github.run_id }}
@@ -757,7 +708,7 @@ jobs:
       - trigger-zombienet-pezcumulus
       - trigger-zombienet-bizinikiwi
       - trigger-zombienet-teyrchain-template
-    if: false  # Disabled until serde_core upstream fix
+    if: always() && !cancelled()
     steps:
       - name: Check zombienet success
         id: check_success
diff --git a/.github/workflows/check-getting-started.yml b/.github/workflows/check-getting-started.yml
index c143a3f9..10568bf0 100644
--- a/.github/workflows/check-getting-started.yml
+++ b/.github/workflows/check-getting-started.yml
@@ -74,8 +74,6 @@ jobs:
     env:
       # Use local templates from the repo instead of cloning from external repos
       PEZKUWI_TEMPLATE_SOURCE: ${{ github.workspace }}/templates
-      # Skip WASM build due to serde_core compatibility issues
-      SKIP_WASM_BUILD: 1
       # Fix HOME directory mismatch in containers (rustup requires this)
       HOME: /root
     steps:
@@ -212,8 +210,6 @@ jobs:
     env:
       # Use local templates from the repo instead of cloning from external repos
       PEZKUWI_TEMPLATE_SOURCE: ${{ github.workspace }}/templates
-      # Skip WASM build due to serde_core compatibility issues
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 425d5366..355c40e2 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -39,29 +39,12 @@ jobs:
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4.1.7
 
-      # Clean stale caches from other workflows that ran on this VPS runner.
-      # Each VPS has limited disk; leftover caches from docs/tests can fill it.
-      - name: Clean stale caches
-        run: |
-          echo "Disk before cleanup:"
-          df -h /cache 2>/dev/null || df -h /
-          for dir in /cache/cargo-target/*/; do
-            [ "$dir" = "/cache/cargo-target/pezkuwi-sdk/" ] && continue
-            echo "Removing stale cache: $dir"
-            rm -rf "$dir"
-          done
-          echo "Disk after cleanup:"
-          df -h /cache 2>/dev/null || df -h /
-
       - name: Rust Cache
         uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
         with:
           shared-key: clippy
           cache-on-failure: true
 
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none || true
-
       - name: script
         id: required
         run: |
@@ -101,43 +84,34 @@ jobs:
           # experimental code may rely on try-runtime and vice-versa
           cargo check --locked --all --features try-runtime,experimental --quiet
 
-  # TEMPORARILY DISABLED: check-core-crypto-features
-  # Reason: serde 1.0.218+ introduces serde_core which causes duplicate panic_impl
-  # when building wasm32 with --features=serde. alloy-consensus requires serde >= 1.0.226
-  # so we cannot pin to older serde.
-  # Tracking issue: https://github.com/pezkuwichain/pezkuwi-sdk/issues/355
-  # Upstream: https://github.com/serde-rs/serde/issues (to be filed)
-  # TODO: Re-enable when serde fixes the wasm32 + no_std + serde feature combination
-  #
-  # check-core-crypto-features:
-  #   runs-on: ${{ needs.preflight.outputs.RUNNER }}
-  #   needs: [preflight]
-  #   if: ${{ needs.preflight.outputs.changes_rust }}
-  #   timeout-minutes: 30
-  #   container:
-  #     image: ${{ needs.preflight.outputs.IMAGE }}
-  #   steps:
-  #     - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4.1.7
-  #     - name: script
-  #       id: required
-  #       run: |
-  #         cd bizinikiwi/primitives/core
-  #         ./check-features-variants.sh
-  #         cd -
-  #         cd bizinikiwi/primitives/application-crypto
-  #         ./check-features-variants.sh
-  #         cd -
-  #         cd bizinikiwi/primitives/keyring
-  #         ./check-features-variants.sh
-  #         cd -
+  check-core-crypto-features:
+    runs-on: ${{ needs.preflight.outputs.RUNNER }}
+    needs: [preflight]
+    if: ${{ needs.preflight.outputs.changes_rust }}
+    timeout-minutes: 30
+    container:
+      image: ${{ needs.preflight.outputs.IMAGE }}
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4.1.7
+      - name: script
+        id: required
+        run: |
+          cd bizinikiwi/primitives/core
+          ./check-features-variants.sh
+          cd -
+          cd bizinikiwi/primitives/application-crypto
+          ./check-features-variants.sh
+          cd -
+          cd bizinikiwi/primitives/keyring
+          ./check-features-variants.sh
+          cd -
   # name of this job must be unique across all workflows
   # otherwise GitHub will mark all these jobs as required
   confirm-required-checks-passed:
     runs-on: ubuntu-latest
     name: All checks passed
     # If any new job gets added, be sure to add it to this array
-    # NOTE: check-core-crypto-features temporarily removed - see comment above
-    needs: [cargo-clippy, check-try-runtime]
+    needs: [cargo-clippy, check-try-runtime, check-core-crypto-features]
     if: always() && !cancelled()
     steps:
       - run: |
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index be50efd9..d2a22726 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -29,7 +29,6 @@ jobs:
         - /cache/cargo-target/pezkuwi-sdk-docs:/cache/target
     env:
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-      SKIP_WASM_BUILD: 1
       CARGO_INCREMENTAL: 0
       CARGO_TARGET_DIR: /cache/target
     steps:
@@ -68,7 +67,6 @@ jobs:
       volumes:
         - /cache/cargo-target/pezkuwi-sdk-docs:/cache/target
     env:
-      SKIP_WASM_BUILD: 1
       CARGO_INCREMENTAL: 0
       CARGO_TARGET_DIR: /cache/target
       RUSTDOCFLAGS: "-Dwarnings --default-theme=ayu --html-in-header ./docs/sdk/assets/header.html --extend-css ./docs/sdk/assets/theme.css --html-after-content ./docs/sdk/assets/after-content.html"
diff --git a/.github/workflows/publish-check-compile.yml b/.github/workflows/publish-check-compile.yml
index f1e7b5fa..9a8b3783 100644
--- a/.github/workflows/publish-check-compile.yml
+++ b/.github/workflows/publish-check-compile.yml
@@ -22,7 +22,6 @@ jobs:
       image: ${{ needs.preflight.outputs.IMAGE }}
     env:
       RUSTFLAGS: "-D warnings"
-      SKIP_WASM_BUILD: 1
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4.1.7
 
diff --git a/.github/workflows/tests-evm.yml b/.github/workflows/tests-evm.yml
index 5083adea..1c070047 100644
--- a/.github/workflows/tests-evm.yml
+++ b/.github/workflows/tests-evm.yml
@@ -22,10 +22,6 @@ jobs:
     timeout-minutes: 60
     container:
       image: ${{ needs.preflight.outputs.IMAGE }}
-    env:
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
     permissions:
       pull-requests: write
     strategy:
@@ -45,8 +41,6 @@ jobs:
           curl -Lsf --show-error -o resolc "$ASSET_URL"
           chmod +x resolc
           ./resolc --version
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: Building the dependencies from the Pezkuwi SDK
         run: cargo build --locked --profile release -p pezpallet-revive-eth-rpc -p pez-revive-dev-node
       - name: Checkout the Differential Tests Repository
@@ -111,9 +105,6 @@ jobs:
       # but still want to have debug assertions.
       RUSTFLAGS: "-C debug-assertions"
       RUST_BACKTRACE: 1
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
     strategy:
       matrix:
         platform:
@@ -122,8 +113,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
       - name: script
         run: |
           cargo build --locked --release -p pezpallet-revive-eth-rpc --bin eth-rpc
diff --git a/.github/workflows/tests-linux-stable-coverage.yml b/.github/workflows/tests-linux-stable-coverage.yml
index a198b134..811366c5 100644
--- a/.github/workflows/tests-linux-stable-coverage.yml
+++ b/.github/workflows/tests-linux-stable-coverage.yml
@@ -34,9 +34,6 @@ jobs:
       # -Cinstrument-coverage slows everything down but it is necessary for code coverage
       # https://doc.rust-lang.org/rustc/instrument-coverage.html
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings -Cinstrument-coverage"
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
       LLVM_PROFILE_FILE: "/__w/pezkuwi-sdk/pezkuwi-sdk/target/coverage/cargo-test-${{ matrix.ci_node_index }}-%p-%m.profraw"
     strategy:
       fail-fast: false
diff --git a/.github/workflows/tests-linux-stable-xp.yml b/.github/workflows/tests-linux-stable-xp.yml
index 97d7388a..bdb6de98 100644
--- a/.github/workflows/tests-linux-stable-xp.yml
+++ b/.github/workflows/tests-linux-stable-xp.yml
@@ -39,9 +39,6 @@ jobs:
       # Enable debug assertions since we are running optimized builds for testing
       # but still want to have debug assertions.
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
@@ -73,9 +70,6 @@ jobs:
       # Enable debug assertions since we are running optimized builds for testing
       # but still want to have debug assertions.
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
diff --git a/.github/workflows/tests-linux-stable.yml b/.github/workflows/tests-linux-stable.yml
index 6d1bdd25..e6ea06b9 100644
--- a/.github/workflows/tests-linux-stable.yml
+++ b/.github/workflows/tests-linux-stable.yml
@@ -32,15 +32,10 @@ jobs:
       WASM_BUILD_RUSTFLAGS: "-C debug-assertions -D warnings"
       # Ensure we run the UI tests.
       RUN_UI_TESTS: 1
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
       CARGO_TARGET_DIR: /cache/target
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none || true
       - name: script
         id: required
         run: |
@@ -62,9 +57,6 @@ jobs:
       # Enable debug assertions since we are running optimized builds for testing
       # but still want to have debug assertions.
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
       CARGO_TARGET_DIR: /cache/target
     steps:
       - name: Checkout
@@ -94,17 +86,11 @@ jobs:
       RUST_TOOLCHAIN: stable
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
       CARGO_INCREMENTAL: 0
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
       CARGO_TARGET_DIR: /cache/target
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none || true
-
       - name: script
         id: required
         run: |
@@ -143,15 +129,10 @@ jobs:
       # Enable debug assertions since we are running optimized builds for testing
       # but still want to have debug assertions.
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
       CARGO_TARGET_DIR: /cache/target
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none || true
       - name: script
         id: required
         run: |
diff --git a/.github/workflows/tests-misc.yml b/.github/workflows/tests-misc.yml
index e74d4a6a..73535f6d 100644
--- a/.github/workflows/tests-misc.yml
+++ b/.github/workflows/tests-misc.yml
@@ -34,9 +34,6 @@ jobs:
       # but still want to have debug assertions.
       RUSTFLAGS: "-C debug-assertions"
       RUST_BACKTRACE: 1
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
@@ -48,37 +45,28 @@ jobs:
           cd ../application-crypto
           cargo build --locked --no-default-features --features full_crypto
 
-  # TEMPORARILY DISABLED: test-pezframe-examples-compile-to-wasm
-  # Reason: serde_core 1.0.228+ causes duplicate lang item error when building
-  # wasm32-unknown-unknown target. The error: "duplicate lang item in crate alloc: exchange_malloc"
-  # This is the same issue that disabled check-core-crypto-features in checks.yml
-  # Tracking issue: https://github.com/pezkuwichain/pezkuwi-sdk/issues/355
-  # TODO: Re-enable when serde upstream fixes the wasm32 + no_std combination
-  #
-  # test-pezframe-examples-compile-to-wasm:
-  #   timeout-minutes: 20
-  #   # into one job
-  #   needs: [preflight, test-full-crypto-feature]
-  #   runs-on: ${{ needs.preflight.outputs.RUNNER }}
-  #   if: ${{ needs.preflight.outputs.changes_rust }}
-  #   container:
-  #     image: ${{ needs.preflight.outputs.IMAGE }}
-  #   env:
-  #     # Enable debug assertions since we are running optimized builds for testing
-  #     # but still want to have debug assertions.
-  #     RUSTFLAGS: "-C debug-assertions"
-  #     RUST_BACKTRACE: 1
-  #   steps:
-  #     - name: Checkout
-  #       uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-  #     - name: Add wasm32v1-none target
-  #       run: rustup target add wasm32v1-none || true
-  #     - name: script
-  #       run: |
-  #         cd bizinikiwi/pezframe/examples/offchain-worker/
-  #         RUSTFLAGS="--cfg bizinikiwi_runtime" cargo build --locked --target=wasm32-unknown-unknown --no-default-features
-  #         cd ../basic
-  #         RUSTFLAGS="--cfg bizinikiwi_runtime" cargo build --locked --target=wasm32-unknown-unknown --no-default-features
+  test-pezframe-examples-compile-to-wasm:
+    timeout-minutes: 20
+    # into one job
+    needs: [preflight, test-full-crypto-feature]
+    runs-on: ${{ needs.preflight.outputs.RUNNER }}
+    if: ${{ needs.preflight.outputs.changes_rust }}
+    container:
+      image: ${{ needs.preflight.outputs.IMAGE }}
+    env:
+      # Enable debug assertions since we are running optimized builds for testing
+      # but still want to have debug assertions.
+      RUSTFLAGS: "-C debug-assertions"
+      RUST_BACKTRACE: 1
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - name: script
+        run: |
+          cd bizinikiwi/pezframe/examples/offchain-worker/
+          RUSTFLAGS="--cfg bizinikiwi_runtime" cargo build --locked --target=wasm32-unknown-unknown --no-default-features
+          cd ../basic
+          RUSTFLAGS="--cfg bizinikiwi_runtime" cargo build --locked --target=wasm32-unknown-unknown --no-default-features
 
   test-pezframe-ui:
     timeout-minutes: 45
@@ -90,7 +78,6 @@ jobs:
     env:
       RUSTFLAGS: "-C debug-assertions -D warnings"
       RUST_BACKTRACE: 1
-      SKIP_WASM_BUILD: 1
       RUN_UI_TESTS: 1
       CARGO_INCREMENTAL: 0
     steps:
@@ -113,44 +100,36 @@ jobs:
           cargo test --locked -q --profile testnet -p pezsp-api-test ui
           cargo test --locked -q --profile testnet --manifest-path bizinikiwi/primitives/runtime-interface/Cargo.toml ui
 
-  # TEMPORARILY DISABLED: test-deterministic-wasm
-  # Reason: This test REQUIRES WASM builds to verify deterministic compilation.
-  # serde_core 1.0.228+ causes duplicate lang item error when building WASM targets.
-  # Error: "duplicate lang item in crate alloc: exchange_malloc"
-  # SKIP_WASM_BUILD=1 makes this test meaningless as there are no WASM files to checksum.
-  # Tracking issue: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-  # TODO: Re-enable when serde upstream fixes the wasm32 + no_std combination
-  #
-  # test-deterministic-wasm:
-  #   timeout-minutes: 40
-  #   needs: [preflight, test-full-crypto-feature]
-  #   runs-on: ${{ needs.preflight.outputs.RUNNER }}
-  #   if: ${{ needs.preflight.outputs.changes_rust }}
-  #   container:
-  #     image: ${{ needs.preflight.outputs.IMAGE }}
-  #   env:
-  #     WASM_BUILD_NO_COLOR: 1
-  #   steps:
-  #     - name: Checkout
-  #       uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-  #
-  #     - name: Clean cargo cache to free disk space
-  #       run: |
-  #         cargo clean 2>/dev/null || true
-  #         rm -rf ~/.cargo/registry/cache 2>/dev/null || true
-  #         rm -rf ~/.cargo/git/db 2>/dev/null || true
-  #
-  #     - name: script
-  #       run: |
-  #         # build runtime
-  #         cargo build -q --locked --release -p zagros-runtime -p pezkuwichain-runtime
-  #         # make checksum
-  #         sha256sum target/release/wbuild/*-runtime/target/wasm32-unknown-unknown/release/*.wasm > checksum.sha256
-  #         cargo clean
-  #         # build again
-  #         cargo build -q --locked --release -p zagros-runtime -p pezkuwichain-runtime
-  #         # confirm checksum
-  #         sha256sum -c checksum.sha256
+  test-deterministic-wasm:
+    timeout-minutes: 40
+    needs: [preflight, test-full-crypto-feature]
+    runs-on: ${{ needs.preflight.outputs.RUNNER }}
+    if: ${{ needs.preflight.outputs.changes_rust }}
+    container:
+      image: ${{ needs.preflight.outputs.IMAGE }}
+    env:
+      WASM_BUILD_NO_COLOR: 1
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Clean cargo cache to free disk space
+        run: |
+          cargo clean 2>/dev/null || true
+          rm -rf ~/.cargo/registry/cache 2>/dev/null || true
+          rm -rf ~/.cargo/git/db 2>/dev/null || true
+
+      - name: script
+        run: |
+          # build runtime
+          cargo build -q --locked --release -p zagros-runtime -p pezkuwichain-runtime
+          # make checksum
+          sha256sum target/release/wbuild/*-runtime/target/wasm32-unknown-unknown/release/*.wasm > checksum.sha256
+          cargo clean
+          # build again
+          cargo build -q --locked --release -p zagros-runtime -p pezkuwichain-runtime
+          # confirm checksum
+          sha256sum -c checksum.sha256
 
   cargo-check-benches:
     needs: [preflight]
@@ -162,10 +141,6 @@ jobs:
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     container:
       image: ${{ needs.preflight.outputs.IMAGE }}
-    env:
-      # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-      # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
@@ -284,9 +259,6 @@ jobs:
           rm -rf ~/.cargo/registry/cache 2>/dev/null || true
           rm -rf ~/.cargo/git/db 2>/dev/null || true
 
-      # NOTE: wasm32v1-none target removed - serde_core + Rust 1.88 bug
-      # wasm-builder will fallback to wasm32-unknown-unknown automatically
-
       - name: Run tests
         id: tests
         env:
@@ -294,9 +266,6 @@ jobs:
           # Enable debug assertions since we are running optimized builds for testing
           # but still want to have debug assertions.
           RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-          # Temporary: Skip WASM build due to serde_core + Rust 1.88 + WASM bug
-          # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
-          SKIP_WASM_BUILD: 1
         run: |
           cargo build --bin pezkuwi-execute-worker --bin pezkuwi-prepare-worker --profile testnet --verbose --locked
           mkdir -p ./artifacts
@@ -339,9 +308,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none || true
-
       - name: script
         run: |
           cargo build --locked -p zagros-runtime --features metadata-hash
@@ -397,8 +363,6 @@ jobs:
     env:
       RUSTFLAGS: "-D warnings"
       CI_JOB_NAME: cargo-check-each-crate
-      # Skip WASM build to avoid serde_core duplicate lang item error
-      SKIP_WASM_BUILD: 1
       CARGO_INCREMENTAL: 0
     strategy:
       matrix:
@@ -413,9 +377,6 @@ jobs:
           shared-key: check-each-crate-${{ matrix.index }}
           cache-on-failure: true
 
-      - name: Add wasm32v1-none target
-        run: rustup target add wasm32v1-none || true
-
       - name: script
         run: |
           PYTHONUNBUFFERED=x .github/scripts/check-each-crate.py ${{ matrix.index }} ${{ strategy.job-total }}
@@ -425,8 +386,6 @@ jobs:
     needs: [preflight]
     runs-on: ${{ needs.preflight.outputs.RUNNER_MACOS }}
     if: ${{ needs.preflight.outputs.changes_rust }}
-    env:
-      SKIP_WASM_BUILD: 1
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Set rust version from env file
@@ -491,18 +450,16 @@ jobs:
     runs-on: ubuntu-latest
     name: All test misc tests passed
     # If any new job gets added, be sure to add it to this array
-    # NOTE: test-pezframe-examples-compile-to-wasm removed - disabled due to serde_core wasm32 issue
-    # NOTE: test-deterministic-wasm removed - disabled due to serde_core wasm32 issue (requires WASM builds)
     needs:
       - test-full-crypto-feature
-      # - test-pezframe-examples-compile-to-wasm  # disabled - serde_core wasm32 issue
+      - test-pezframe-examples-compile-to-wasm
       - test-pezframe-ui
+      - test-deterministic-wasm
       - cargo-check-benches
       - pez-node-bench-regression-guard
       - test-node-metrics
       - check-tracing
       - cargo-check-each-crate
-      # - test-deterministic-wasm  # disabled - serde_core wasm32 issue (requires WASM builds)
       # - cargo-hfuzz remove from required for now, as it's flaky
     if: always() && !cancelled()
     steps:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e950f04a..5e843e8a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,11 +19,9 @@ jobs:
     uses: ./.github/workflows/reusable-preflight.yml
 
   # This job runs all benchmarks defined in the `/bin/node/runtime` once to check that there are no errors.
-  # TEMPORARILY DISABLED: Requires WASM but serde_core + Rust 1.88 + wasm32 bug prevents WASM build
-  # Tracking: https://github.com/pezkuwichain/pezkuwi-sdk/issues/358
   quick-benchmarks:
     needs: [preflight]
-    if: false  # Disabled until serde_core upstream fix
+    if: ${{ needs.preflight.outputs.changes_rust }}
     runs-on: ${{ needs.preflight.outputs.RUNNER }}
     timeout-minutes: 45
     container:
@@ -56,8 +54,6 @@ jobs:
     container:
       image: ${{ needs.preflight.outputs.IMAGE }}
     continue-on-error: true # this rarely triggers in practice
-    env:
-      SKIP_WASM_BUILD: 1
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
@@ -81,7 +77,6 @@ jobs:
     container:
       image: ${{ needs.preflight.outputs.IMAGE }}
     env:
-      SKIP_WASM_BUILD: 1
       CARGO_INCREMENTAL: 0
     steps:
       - name: Checkout