scriptc/.github/workflows/ci.yml

name: CI

on:
  push:
    branches: [main]
  pull_request:
  # Nightly full macOS sweep. Pushes to main run no macOS jobs, and pull requests run them only when they change
  # darwin code (scripts/ci-lanes.mjs).
  schedule:
    - cron: "17 7 * * *"
  # A manual run, for example on a release candidate commit. It runs every lane; macos_suite selects the complete
  # suite on macOS, as the nightly sweep runs it, or the darwin suite that pull requests run.
  workflow_dispatch:
    inputs:
      macos_suite:
        description: The test suite to run on macOS
        type: choice
        options: [full, darwin]
        default: full

concurrency:
  # A new push to a pull request cancels its previous run. Every push to main runs to completion in a group of
  # its own commit, so each merged commit gets a result (releases require a green run on their commit). The
  # nightly sweep and manual runs neither cancel nor are cancelled by main pushes.
  group: ci-${{ github.event_name == 'schedule' && 'schedule' || github.event_name == 'workflow_dispatch' && format('dispatch-{0}', github.run_id) || github.event.pull_request.number || github.sha }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

jobs:
  # GitHub recommends stack.base.ref == base.ref for the lowest unmerged PR:
  # https://docs.github.com/en/pull-requests/how-tos/merge-and-close-pull-requests/optimizing-ci-for-stacked-pull-requests
  # Only trusted, same-repository upper layers defer full CI. Forks, ordinary
  # PRs, pushes and incomplete metadata always retain full validation.
  validation_scope:
    name: Select CI scope
    runs-on: ubuntu-24.04
    timeout-minutes: 5
    permissions: {}
    outputs:
      full: ${{ steps.scope.outputs.full }}
    steps:
      - id: scope
        # Read GitHub's event directly; do not run scripts from a PR checkout.
        run: |
          node <<'NODE'
          const { appendFileSync, readFileSync } = require('node:fs');
          const event = JSON.parse(readFileSync(process.env.GITHUB_EVENT_PATH, 'utf8'));
          const pr = event.pull_request;
          const repository = event.repository?.full_name;
          const sameRepository = typeof repository === 'string' && repository.length > 0 &&
            pr?.head?.repo?.full_name === repository && pr?.base?.repo?.full_name === repository;
          const trustedAuthor = ['OWNER', 'MEMBER', 'COLLABORATOR'].includes(pr?.author_association);
          const stackBase = pr?.stack?.base?.ref;
          const prBase = pr?.base?.ref;
          // Position 1 can already be merged; compare the current base branches.
          const upperLayer = process.env.GITHUB_EVENT_NAME === 'pull_request' &&
            sameRepository && trustedAuthor && typeof stackBase === 'string' && stackBase.length > 0 &&
            typeof prBase === 'string' && prBase.length > 0 && stackBase !== prBase;
          const full = !upperLayer;
          appendFileSync(process.env.GITHUB_OUTPUT, `full=${full}\n`);
          console.log(full ? 'Run full CI' : 'Defer full CI until this PR becomes the lowest unmerged layer');
          NODE

  # Which expensive lanes a pull request needs (scripts/ci-lanes.mjs, run from the base commit against the pull
  # request's diff, so a pull request cannot change its own selection). Pushes to main run every lane except macos,
  # whose jobs the nightly sweep runs on main. The nightly sweep and manual runs run every lane.
  lanes:
    needs: validation_scope
    if: ${{ needs.validation_scope.outputs.full == 'true' }}
    name: Select CI lanes
    runs-on: ubuntu-24.04
    timeout-minutes: 5
    permissions:
      contents: read
    outputs:
      linux: ${{ steps.lanes.outputs.linux }}
      macos: ${{ steps.lanes.outputs.macos }}
      effects: ${{ steps.lanes.outputs.effects }}
      bootstrap: ${{ steps.lanes.outputs.bootstrap }}
    steps:
      - uses: actions/checkout@v4
        if: github.event_name == 'pull_request'
        with:
          fetch-depth: 0
          ref: ${{ github.event.pull_request.head.sha }}
      - id: lanes
        env:
          EVENT: ${{ github.event_name }}
          BASE: ${{ github.event.pull_request.base.sha }}
          HEAD: ${{ github.event.pull_request.head.sha }}
        run: |
          every() { printf 'linux=true\nmacos=true\neffects=true\nbootstrap=true\n' | tee -a "$GITHUB_OUTPUT"; }
          if [ "$EVENT" = push ]; then
            printf 'linux=true\nmacos=false\neffects=true\nbootstrap=true\n' | tee -a "$GITHUB_OUTPUT"
          elif [ "$EVENT" != pull_request ]; then
            every
          elif git show "$BASE:scripts/ci-lanes.mjs" > "$RUNNER_TEMP/ci-lanes.mjs" 2> /dev/null; then
            node "$RUNNER_TEMP/ci-lanes.mjs" --base "$BASE" --head "$HEAD" --github-output
          else
            echo "The base commit has no scripts/ci-lanes.mjs: every lane"
            every
          fi

  code_quality:
    name: lint and format
    runs-on: ubuntu-24.04
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - run: pnpm lint
      - run: pnpm format:check
      - name: Code quality and CI policy contracts
        run: pnpm test tests/harness/code-quality.test.ts tests/harness/ci-stack-scope.test.ts
        env:
          SCRIPTC_TEST_WORKERS: "1"
      - name: Verify mixed-source generated AST getters
        run: pnpm generate:ts7-ast --check

  native_macos:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.macos == 'true' }}
    name: build (macOS arm64 native packages)
    runs-on: macos-15
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - uses: ./.github/actions/native-packages
        with:
          target: darwin-arm64
      - name: Preserve executable permissions in shared packages
        run: >-
          tar -czf "$RUNNER_TEMP/native-darwin-arm64.tar.gz"
          packages/llvm-darwin-arm64/bin
          packages/runtime-darwin-arm64/artifacts
          packages/runtime-darwin-arm64/runtime-pack.json
      - uses: actions/upload-artifact@v4
        with:
          name: native-darwin-arm64
          path: ${{ runner.temp }}/native-darwin-arm64.tar.gz
          retention-days: 1

  tests:
    needs: [validation_scope, lanes, native_linux]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: test (Linux, ${{ matrix.flavor }}, ${{ matrix.shard }}/20)
    # The full suite runs on Linux x64, whose hosted runners start without the
    # macOS queue. tests_macos keeps the darwin clang/libc oracles.
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        flavor: [plain, san]
        # Twenty shards keep each job near six minutes of tests (the corpus
        # programs are balanced by measured cost, tests/harness/shard.ts).
        shard: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
    env:
      # Capped workers: the shared runner's cores oversubscribe under the
      # corpus compile fan-out, and vitest's worker RPC times out ("Timeout
      # calling onTaskUpdate") with every test green — the same contention
      # artifact the harness README documents for local parallel suites.
      SCRIPTC_TEST_WORKERS: "4"
      # san = ASan + RC audit over the same suite; anything but "1" is plain.
      SCRIPTC_SAN: ${{ matrix.flavor == 'san' && '1' || '' }}
      # Match macOS, where Apple ASan has no LeakSanitizer: the RC audit owns
      # leak detection, including intentional abandonment. Plain shards also
      # build some sanitized probes, so this applies to both flavors. The
      # san shards' case-sharded corpus turns LeakSanitizer on
      # (scripts/ci-test-plan.mjs, tests/harness/lsan.supp).
      ASAN_OPTIONS: detect_leaks=0
      # Within-file partition for the large case-driven harnesses
      # (differential, llvm-differential, npm, server, Test262, coverage, and
      # Vercel E2E): partition stable case names into slice i of 20
      # (tests/harness/shard.ts). The twenty shards' unions run every case
      # exactly once. vitest's own --shard is FILE-granular and cannot split
      # these monster files (differential.test.ts alone is ~9 min
      # sequential), hence the case-sharded steps below.
      SCRIPTC_TEST_SHARD: ${{ matrix.shard }}/20
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - uses: ./.github/actions/llvm-linux
      - run: pnpm install --frozen-lockfile
      - uses: actions/download-artifact@v4
        with:
          name: native-linux-x64-gnu
          path: ${{ runner.temp }}
      - run: tar -xzf "$RUNNER_TEMP/native-linux-x64-gnu.tar.gz"
      - run: pnpm build
      # Ubuntu pipes core dumps to apport, and RLIMIT_CORE does not limit a
      # piped dump. The kernel then streams every page of the runtime's
      # reserved allocator address space through the pipe, so each expected
      # abort outlives its test timeout. Write cores to files instead, where
      # the limit below applies.
      - name: Disable piped core dumps
        run: sudo sysctl -w kernel.core_pattern=core
      # Start the corpus immediately beside a serial side queue. One shared
      # worker budget covers both processes; file and case shard axes stay
      # separate so every fixture still runs exactly once in each lane.
      - name: Tests (corpus and integration suites)
        run: |
          ulimit -c 0
          node scripts/ci-test.mjs

  tests_macos:
    needs: [validation_scope, lanes, native_macos]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.macos == 'true' }}
    name: test (macOS, ${{ matrix.flavor }}, ${{ (github.event_name != 'schedule' && inputs.macos_suite != 'full') && 'darwin ' || '' }}${{ matrix.shard }}/${{ (github.event_name != 'schedule' && inputs.macos_suite != 'full') && '3' || '10' }})
    # arm64 macOS: same clang/libc the differential + number-formatting
    # oracles were verified against. Pull requests that change darwin code and
    # manual runs with macos_suite set to darwin run the darwin suite
    # (scripts/ci-test-plan.mjs) in three slices; the nightly schedule and
    # other manual runs run the complete suite in ten. The complete suite on
    # every push needed more macOS runners than the repository has.
    runs-on: macos-15
    strategy:
      fail-fast: false
      matrix:
        flavor: [plain, san]
        shard: ${{ fromJSON((github.event_name != 'schedule' && inputs.macos_suite != 'full') && '[1, 2, 3]' || '[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]') }}
    env:
      # See the Linux tests job for the worker cap and case partitioning.
      SCRIPTC_TEST_WORKERS: "4"
      SCRIPTC_SAN: ${{ matrix.flavor == 'san' && '1' || '' }}
      SCRIPTC_TEST_SHARD: ${{ matrix.shard }}/${{ (github.event_name != 'schedule' && inputs.macos_suite != 'full') && '3' || '10' }}
      SCRIPTC_CI_SUITE: ${{ (github.event_name != 'schedule' && inputs.macos_suite != 'full') && 'darwin' || 'full' }}
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - uses: actions/download-artifact@v4
        with:
          name: native-darwin-arm64
          path: ${{ runner.temp }}
      - run: tar -xzf "$RUNNER_TEMP/native-darwin-arm64.tar.gz"
      - run: pnpm build
      - name: Tests (${{ (github.event_name != 'schedule' && inputs.macos_suite != 'full') && 'darwin suite' || 'corpus and integration suites' }})
        run: node scripts/ci-test.mjs

  native_linux:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: build (Linux x64 native packages)
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - uses: ./.github/actions/llvm-linux
      - run: pnpm install --frozen-lockfile
      - uses: ./.github/actions/zig
      - uses: ./.github/actions/native-packages
        with:
          target: linux-x64-gnu
      - name: Preserve executable permissions in shared packages
        run: >-
          tar -czf "$RUNNER_TEMP/native-linux-x64-gnu.tar.gz"
          packages/llvm-linux-x64-gnu/bin
          packages/runtime-linux-x64-gnu/artifacts
          packages/runtime-linux-x64-gnu/runtime-pack.json
      - uses: actions/upload-artifact@v4
        with:
          name: native-linux-x64-gnu
          path: ${{ runner.temp }}/native-linux-x64-gnu.tar.gz
          retention-days: 1

  effects:
    needs: [validation_scope, lanes, native_linux]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.effects == 'true' }}
    name: test (Linux, ${{ matrix.flavor }}, Effect ${{ matrix.shard }}/16)
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        flavor: [plain, san]
        shard: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]
    env:
      # One compiler at a time leaves room for its 8 GiB heap, checker and
      # LLVM on a 16 GB runner. Parallelism comes from independent shards.
      # Both package versions retain every Node/native comparison in both
      # flavors; Effect 3 plain also retains its release optimizer coverage.
      SCRIPTC_TEST_WORKERS: "1"
      SCRIPTC_EFFECT_TEST_CONCURRENCY: "1"
      SCRIPTC_TEST_SHARD: ${{ matrix.shard }}/16
      SCRIPTC_SAN: ${{ matrix.flavor == 'san' && '1' || '' }}
      ASAN_OPTIONS: detect_leaks=0
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - uses: actions/download-artifact@v4
        with:
          name: native-linux-x64-gnu
          path: ${{ runner.temp }}
      - run: tar -xzf "$RUNNER_TEMP/native-linux-x64-gnu.tar.gz"
      - run: pnpm test tests/harness/effect.test.ts tests/harness/effect4.test.ts

  # Build each instrumented seed once. Downstream contracts retain the same
  # compiler and source artifacts without repeating seed construction.
  bootstrap_seed:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.bootstrap == 'true' }}
    name: build (Linux, ${{ matrix.flavor }}, bootstrap seed)
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        flavor: [plain, san]
    env:
      SCRIPTC_SAN: ${{ matrix.flavor == 'san' && '1' || '' }}
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - uses: ./.github/actions/llvm-linux
      - run: pnpm install --frozen-lockfile
      - uses: ./.github/actions/zig
      - uses: ./.github/actions/native-packages
        with:
          target: linux-x64-gnu
      - uses: ./.github/actions/native-packages
        with:
          target: wasm32-wasi
          helper: "false"
      - run: pnpm build
      - name: Prepare bootstrap seed
        run: node scripts/bootstrap-seed.mjs
        env:
          SCRIPTC_BOOTSTRAP_SEED_DIRECTORY: ${{ runner.temp }}/native-bootstrap
      - name: Archive seed and compiler artifacts
        run: tar -C "$RUNNER_TEMP" -cf "$RUNNER_TEMP/bootstrap-seed.tar" native-bootstrap
      - uses: actions/upload-artifact@v4
        with:
          name: bootstrap-seed-${{ matrix.flavor }}-${{ github.sha }}
          path: ${{ runner.temp }}/bootstrap-seed.tar
          retention-days: 1
          if-no-files-found: error

  bootstrap:
    needs: [validation_scope, lanes, bootstrap_seed]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.bootstrap == 'true' }}
    name: test (Linux, ${{ matrix.flavor }}, native bootstrap, ${{ matrix.phase }})
    # These contracts are portable. Standard Linux runners have enough memory
    # for LLVM optimization alongside the compiler that produces its input.
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        # The sanitized self-rebuild is split at the IR boundary: one job
        # lowers the compiler and compares its IR with the seed's; the other
        # emits, links and probes the next generation from the seed's IR.
        include:
          - { flavor: plain, phase: commands }
          - { flavor: plain, phase: rebuild }
          - { flavor: san, phase: commands }
          - { flavor: san, phase: rebuild-frontend }
          - { flavor: san, phase: rebuild-emit }
    env:
      SCRIPTC_TEST_WORKERS: "1"
      SCRIPTC_SAN: ${{ matrix.flavor == 'san' && '1' || '' }}
      SCRIPTC_BOOTSTRAP_PHASE: ${{ matrix.phase }}
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - uses: ./.github/actions/llvm-linux
      - run: pnpm install --frozen-lockfile
      - uses: ./.github/actions/zig
      # Rebuilds use the relocated seed's packaged helper and runtimes.
      - uses: ./.github/actions/native-packages
        if: matrix.phase == 'commands'
        with:
          target: linux-x64-gnu
      - uses: ./.github/actions/native-packages
        if: matrix.phase == 'commands'
        with:
          target: wasm32-wasi
          helper: "false"
      - run: pnpm build
      - uses: actions/download-artifact@v4
        with:
          name: bootstrap-seed-${{ matrix.flavor }}-${{ github.sha }}
          path: ${{ runner.temp }}
      - name: Restore bootstrap seed
        run: tar -C "$RUNNER_TEMP" -xf "$RUNNER_TEMP/bootstrap-seed.tar"
      # The sanitized emitter peaks near 13 GB while it emits the compiler,
      # then clang compiles the 348 MB module under AddressSanitizer. Together
      # they exceed the runner's 16 GB of memory, so back them with swap.
      - name: Enlarge swap for the sanitized emitter
        if: matrix.phase == 'rebuild-emit'
        run: |
          sudo swapoff -a
          sudo rm -f /mnt/swapfile
          sudo fallocate -l 24G /mnt/swapfile
          sudo chmod 600 /mnt/swapfile
          sudo mkswap /mnt/swapfile
          sudo swapon /mnt/swapfile
          free -h
      - name: Native bootstrap and package installation checks
        # The instrumented emitter's recursion can exceed the default 8 MiB stack.
        run: |
          if [ "$SCRIPTC_BOOTSTRAP_PHASE" = rebuild-emit ]; then ulimit -s unlimited; fi
          node scripts/ci-native-bootstrap.mjs
        env:
          SCRIPTC_BOOTSTRAP_SEED_DIRECTORY: ${{ runner.temp }}/native-bootstrap
          SCRIPTC_BOOTSTRAP_PACKAGE_DIR: ${{ runner.temp }}/native-cli-package

  # A real host-clang/glibc build, not the zig cross-target lane: catches
  # Linux feature-test macro omissions at compile time and separate-libm
  # omissions/order errors at link time.
  linux_host_clang:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: test (linux host clang/glibc)
    runs-on: ubuntu-24.04
    timeout-minutes: 10
    env:
      # The verdict must come from a live clang invocation, never a cached
      # binary copied from a previous build.
      SCRIPTC_NO_CACHE: "1"
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - run: pnpm build
      - name: Host clang and sanitizer build regressions
        run: >-
          pnpm test packages/compiler/test/cc-driver.test.ts
          packages/compiler/src/native/sanitizer.test.ts
          --testNamePattern "host-native clang static build|sanitized vendor archives"

  # The TS7 parity sweep exercises the compiler frontend, so it can run
  # alongside the Linux LLVM/runtime package build instead of following it.
  ts7_parity:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: test (TypeScript 7 parity)
    runs-on: ubuntu-24.04
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - run: pnpm build
      - name: TypeScript 7 full parity sweep
        run: pnpm test:ts7

  # tsc-ts, the default checker, and tsgo (SCRIPTC_CHECKER=tsgo) serve the same TypeScript 7 API. Every corpus
  # program must compile to the same LLVM IR, with the same diagnostics, with either checker.
  checker_identity:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: test (tsgo and tsc-ts give the same IR)
    runs-on: ubuntu-24.04
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - run: pnpm build
      - name: Corpus LLVM IR with tsgo and with tsc-ts (release)
        run: pnpm test:checker-identity --optimization release
      - name: Corpus LLVM IR with tsgo and with tsc-ts (dev)
        run: pnpm test:checker-identity --optimization dev

  llvm_artifacts_linux_x64:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: test (Linux x64 LLVM artifacts, no clang)
    runs-on: ubuntu-24.04
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - uses: ./.github/actions/llvm-linux
      - run: pnpm install --frozen-lockfile
      - uses: ./.github/actions/zig
      - uses: ./.github/actions/native-packages
        with:
          target: linux-x64-gnu
      - name: Build and verify Linux x64 musl release packages
        run: |
          pnpm --filter @scriptc/llvm-linux-x64-musl build:native
          CC=zig AR=zig pnpm --filter @scriptc/runtime-linux-x64-musl build:native
          helper=packages/llvm-linux-x64-musl/bin/scriptc-llvm-codegen
          readelf -l "$helper" > "$RUNNER_TEMP/musl-helper-program-headers"
          if grep -q INTERP "$RUNNER_TEMP/musl-helper-program-headers"; then
            echo "musl helper must be a static executable" >&2
            exit 1
          fi
          docker run --rm --volume "$GITHUB_WORKSPACE:/work:ro" alpine:3.22 \
            /work/$helper version --format=json | node -e '
              const value = JSON.parse(require("node:fs").readFileSync(0, "utf8"));
              if (value.default_target !== "x86_64-unknown-linux-musl" || !value.supported_targets?.includes("wasm32-unknown-wasi")) process.exit(1);
            '
          node packages/runtime-linux-x64-musl/scripts/verify.mjs
      - uses: ./.github/actions/native-packages
        with:
          target: wasm32-wasi
          helper: "false"
      - run: pnpm build
      - name: Linux helper object format and no-clang output contract
        run: |
          PATH="$RUNNER_TEMP/traps:$PATH"
          mkdir -p "$RUNNER_TEMP/traps"
          for tool in clang cc gcc ar ld; do printf '#!/bin/sh\nexit 97\n' > "$RUNNER_TEMP/traps/$tool"; chmod +x "$RUNNER_TEMP/traps/$tool"; done
          node packages/cli/dist/main.js build tests/corpus/001-hello.ts --emit=obj -o "$RUNNER_TEMP/hello.o"
          file "$RUNNER_TEMP/hello.o" | grep 'ELF 64-bit LSB relocatable, x86-64'
      - name: Linux helper/runtime-pack executable differential smoke
        env:
          SCRIPTC_NO_CACHE: "1"
          SCRIPTC_LEGACY_C_PIPELINE: "0"
        run: |
          node packages/cli/dist/main.js build tests/corpus/001-hello.ts -o "$RUNNER_TEMP/hello"
          test "$("$RUNNER_TEMP/hello")" = 'hello world'
      - name: Linux release runtime reachability and debug payload
        run: pnpm test tests/harness/runtime-tree-shaking.test.ts
      - name: Debian 12 glibc 2.36 runtime-pack smoke
        run: |
          docker run --rm --volume "$GITHUB_WORKSPACE:/work:ro" --workdir /work node:24-bookworm-slim sh -ec '
            apt-get update
            apt-get install --yes --no-install-recommends clang
            SCRIPTC_NO_CACHE=1 SCRIPTC_LEGACY_C_PIPELINE=0 node packages/cli/dist/main.js build tests/corpus/001-hello.ts -o /tmp/hello
            test "$(/tmp/hello)" = "hello world"
          '
      - name: WASI helper object/runtime-pack smoke
        run: pnpm test packages/cli/test/wasi-runtime-pack.test.ts tests/harness/wasm-library.test.ts

  llvm_artifacts_macos_arm64:
    needs: [validation_scope, lanes, native_macos]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.macos == 'true' }}
    name: test (macOS arm64 LLVM artifacts, no clang, ${{ matrix.shard }}/5)
    runs-on: macos-15
    # Shard 1 additionally runs package/install and link-parity contracts
    # before its LLVM differential slice. The slice itself can take ~10
    # minutes on a cold hosted runner, so 20 minutes cancels an otherwise
    # healthy job before the differential completes.
    timeout-minutes: 35
    strategy:
      fail-fast: false
      matrix:
        shard: [1, 2, 3, 4, 5]
    env:
      # The helper differential uses the harness's stable per-case sharding,
      # keeping each macOS job below its timeout while the matrix union still
      # exercises every LLVM-tier program.
      SCRIPTC_TEST_SHARD: ${{ matrix.shard }}/5
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - uses: actions/download-artifact@v4
        with:
          name: native-darwin-arm64
          path: ${{ runner.temp }}
      - run: tar -xzf "$RUNNER_TEMP/native-darwin-arm64.tar.gz"
      - run: pnpm build
      - name: No-clang assembly/object contract
        if: matrix.shard == 1
        run: pnpm test packages/cli/test/native-output.test.ts
      - name: Helper diagnostics and object/link parity
        if: matrix.shard == 1
        run: >-
          pnpm test
          packages/compiler/test/native-codegen-integration.test.ts
          packages/compiler/src/backend/runtime-pack.test.ts
          packages/cli/test/native-link-info.test.ts
          packages/cli/test/runtime-pack.test.ts
          tests/harness/native-object-example.test.ts
      - name: LLVM release/dev differential (${{ matrix.shard }}/5)
        env:
          SCRIPTC_TEST_WORKERS: "4"
        run: pnpm test tests/harness/llvm-differential.test.ts
      - name: Packaged helper contract
        if: matrix.shard == 1
        run: |
          TARBALL=$(pnpm --dir packages/llvm-darwin-arm64 pack --pack-destination "$RUNNER_TEMP" --silent)
          node scripts/verify-llvm-package.mjs "$RUNNER_TEMP/$(basename "$TARBALL")"
      - name: Packed npm installation smoke
        if: matrix.shard == 1
        env:
          # Release optimization is covered by the compiler bootstrap jobs.
          # This lane verifies packaging and installation with a faster seed.
          SCRIPTC_NATIVE_OPTIMIZATION: dev
        run: |
          pnpm --filter @scriptc/cli-darwin-arm64 build:native
          pnpm --dir packages/runtime pack --pack-destination "$RUNNER_TEMP" --silent
          pnpm --dir packages/runtime-darwin-arm64 pack --pack-destination "$RUNNER_TEMP" --silent
          pnpm --dir packages/compiler pack --pack-destination "$RUNNER_TEMP" --silent
          pnpm --dir packages/cli-darwin-arm64 pack --pack-destination "$RUNNER_TEMP" --silent
          pnpm --dir packages/cli pack --pack-destination "$RUNNER_TEMP" --silent
          PREFIX="$RUNNER_TEMP/installed-scriptc"
          npm install --prefix "$PREFIX" --no-audit --no-fund \
            "$RUNNER_TEMP/scriptc-runtime-$(node -p "require('./packages/runtime/package.json').version").tgz" \
            "$RUNNER_TEMP/scriptc-runtime-darwin-arm64-$(node -p "require('./packages/runtime-darwin-arm64/package.json').version").tgz" \
            "$RUNNER_TEMP/scriptc-llvm-darwin-arm64-$(node -p "require('./packages/llvm-darwin-arm64/package.json').version").tgz" \
            "$RUNNER_TEMP/scriptc-compiler-$(node -p "require('./packages/compiler/package.json').version").tgz" \
            "$RUNNER_TEMP/scriptc-cli-darwin-arm64-$(node -p "require('./packages/cli-darwin-arm64/package.json').version").tgz" \
            "$RUNNER_TEMP/scriptc-$(node -p "require('./packages/cli/package.json').version").tgz"
          PATH="" "$PREFIX/node_modules/.bin/scriptc" build tests/corpus/001-hello.ts \
            --emit=obj -o "$RUNNER_TEMP/installed.o"
          file "$RUNNER_TEMP/installed.o" | grep 'Mach-O 64-bit object arm64'
          PATH="" "$PREFIX/node_modules/.bin/scriptc" build tests/corpus/001-hello.ts \
            --print=native-link-info -o "$RUNNER_TEMP/installed-link.o" \
            > "$RUNNER_TEMP/installed-link.json"
          node examples/native-object/link.mjs cc \
            "$RUNNER_TEMP/installed-link.json" "$RUNNER_TEMP/installed-program"
          test "$("$RUNNER_TEMP/installed-program")" = 'hello world'

  llvm_artifacts_macos_x64:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.macos == 'true' }}
    name: test (macOS x64 LLVM artifacts, no clang)
    runs-on: macos-15-intel
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - run: pnpm install --frozen-lockfile
      - uses: ./.github/actions/native-packages
        with:
          target: darwin-x64
      - run: pnpm build
      - name: Intel Mach-O no-clang object contract
        run: |
          mkdir -p "$RUNNER_TEMP/traps"
          for tool in clang cc gcc ar ld; do printf '#!/bin/sh\nexit 97\n' > "$RUNNER_TEMP/traps/$tool"; chmod +x "$RUNNER_TEMP/traps/$tool"; done
          PATH="$RUNNER_TEMP/traps:$PATH" node packages/cli/dist/main.js build tests/corpus/001-hello.ts --emit=obj -o "$RUNNER_TEMP/hello.o"
          file "$RUNNER_TEMP/hello.o" | grep 'Mach-O 64-bit object x86_64'
      - name: Intel helper/runtime-pack executable smoke
        env:
          SCRIPTC_NO_CACHE: "1"
          SCRIPTC_LEGACY_C_PIPELINE: "0"
        run: |
          node packages/cli/dist/main.js build tests/corpus/001-hello.ts -o "$RUNNER_TEMP/hello"
          test "$($RUNNER_TEMP/hello)" = 'hello world'

  # Exercises the supported Windows GNU target and the built CLI end to end:
  # TS7 must open its synthetic project, ambient files must resolve across
  # slash styles, and the default executable must use the .exe suffix.
  windows_cli:
    name: test (windows CLI smoke)
    needs: [validation_scope, lanes, llvm_artifacts_windows_x64]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    runs-on: windows-latest
    timeout-minutes: 15
    env:
      SCRIPTC_NO_CACHE: "1"
      SCRIPTC_CC: zigcc
      SCRIPTC_TARGET: x86_64-windows-gnu
    steps:
      - uses: actions/checkout@v4
      - uses: ./.github/actions/zig
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - name: Install dependencies
        shell: pwsh
        run: |
          pnpm install --frozen-lockfile
          if ($LASTEXITCODE -ne 0) {
            Write-Host "pnpm exited without a diagnostic; retrying once"
            pnpm install --frozen-lockfile
          }
      - uses: actions/download-artifact@v4
        with:
          name: windows-native-packages
          path: packages
      - run: pnpm build
      - name: Windows path regressions
        run: pnpm exec vitest run packages/compiler/test/ts7/program-adapter.test.ts packages/compiler/test/ts7/resolver-parity.test.ts packages/compiler/src/native/toolchain.test.ts packages/cli/test/paths.test.ts
      - name: Windows Sandbox path regression
        run: >-
          pnpm exec vitest run tests/harness/worktree-files.test.ts
          --testNamePattern "workspace reset keeps Linux Sandbox paths POSIX"
      - name: Windows scriptc run smoke
        shell: pwsh
        run: |
          zig version
          $output = & node packages/cli/dist/main.js run tests/corpus/001-hello.ts --backend llvm
          if ($LASTEXITCODE -ne 0) {
            exit $LASTEXITCODE
          }
          $actual = ($output -join "`n").Trim()
          if ($actual -ne "hello world") {
            throw "unexpected scriptc output: $actual"
          }
      - name: Windows PE subsystem selection
        env:
          SCRIPTC_NO_CACHE: "0"
        run: pnpm exec vitest run packages/cli/test/windows-subsystem.test.ts
      - name: Windows utility runtime linking
        run: pnpm exec vitest run packages/compiler/test/util-runtime-linking.test.ts
      - name: Windows filesystem links differential
        run: >-
          pnpm exec vitest run tests/harness/differential.test.ts tests/harness/project-config.test.ts
          --testNamePattern "node24-fs-links|filesystem links"
      - name: Windows CA-store differential
        shell: pwsh
        run: |
          $nodeOutput = & node tests/corpus/2557-tls-ca-store.ts
          if ($LASTEXITCODE -ne 0) {
            exit $LASTEXITCODE
          }
          $nativeOutput = & node packages/cli/dist/main.js run tests/corpus/2557-tls-ca-store.ts --backend llvm
          if ($LASTEXITCODE -ne 0) {
            exit $LASTEXITCODE
          }
          $expected = ($nodeOutput -join "`n").Trim()
          $actual = ($nativeOutput -join "`n").Trim()
          if ($actual -ne $expected) {
            throw "Windows CA-store output differed:`nNODE:`n$expected`nNATIVE:`n$actual"
          }
      - name: Windows CA EKU policy
        run: >-
          pnpm exec vitest run packages/compiler/test/cc-driver.test.ts
          --testNamePattern "Windows CA roots honor"

  llvm_artifacts_windows_x64:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: test (Windows x64 MSVC LLVM artifacts)
    # The official LLVM 22 Windows archives are MSVC-built and the helper
    # selects CMake's VS 2022 generator. `windows-latest` can move to an
    # image without that generator, so retain the hosted VS 2022 contract.
    runs-on: windows-2022
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version-file: .node-version
          cache: pnpm
      - name: Install pinned LLVM development distribution
        shell: pwsh
        run: |
          # windows-2022 already provides CMake, Ninja, VS 2022, and 7-Zip.
          # Use the complete archive because it supplies LLVM's exported CMake
          # targets and static libraries. Windows tar.exe takes 25+ minutes to
          # materialize it; two-stage 7-Zip extraction takes seconds.
          $archive = "$env:RUNNER_TEMP\clang+llvm-22.1.8-x86_64-pc-windows-msvc.tar.xz"
          $llvm = "$env:RUNNER_TEMP\llvm-22.1.8"
          $expanded = "$env:RUNNER_TEMP\llvm-expanded"
          $sevenZip = "$env:ProgramFiles\7-Zip\7z.exe"
          if (-not (Test-Path $sevenZip)) {
            choco install 7zip --no-progress -y
            if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          }
          if (-not (Test-Path $sevenZip)) { throw "7-Zip is unavailable" }
          curl.exe -fL --retry 3 -o $archive https://github.com/llvm/llvm-project/releases/download/llvmorg-22.1.8/clang%2Bllvm-22.1.8-x86_64-pc-windows-msvc.tar.xz
          & $sevenZip x -y "-o$expanded" $archive
          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          & $sevenZip x -y "-o$expanded" "$expanded\clang+llvm-22.1.8-x86_64-pc-windows-msvc.tar"
          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          Move-Item "$expanded\clang+llvm-22.1.8-x86_64-pc-windows-msvc" $llvm
          echo "LLVM_DIR=$llvm\lib\cmake\llvm" >> $env:GITHUB_ENV
          echo "$llvm\bin" >> $env:GITHUB_PATH
      - run: pnpm install --frozen-lockfile
      - name: Build Windows helper
        run: pnpm --filter @scriptc/llvm-win32-x64-msvc build:native
      - uses: ./.github/actions/zig
      - name: Build Windows runtime pack
        run: pnpm --filter @scriptc/runtime-win32-x64-msvc build:native
      - run: pnpm build
      - name: Windows COFF no-clang object contract
        shell: pwsh
        run: |
          node packages/cli/dist/main.js build tests/corpus/001-hello.ts --emit=obj -o "$env:RUNNER_TEMP\hello.obj"
          $bytes = [System.IO.File]::ReadAllBytes("$env:RUNNER_TEMP\hello.obj")
          if ($bytes[0] -ne 0x64 -or $bytes[1] -ne 0x86) { throw "expected AMD64 COFF object" }
      - uses: actions/upload-artifact@v4
        with:
          name: windows-native-packages
          path: |
            packages/llvm-win32-x64-msvc/bin
            packages/runtime-win32-x64-msvc/artifacts
            packages/runtime-win32-x64-msvc/runtime-pack.json
          retention-days: 1

  mobile_runtime_packs:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.linux == 'true' }}
    name: test (${{ matrix.runtime }})
    strategy:
      fail-fast: false
      matrix:
        runtime: [runtime-android-arm64]
    runs-on: ubuntu-24.04
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@v4
      - uses: ./.github/actions/mobile-runtime-pack
        with:
          runtime: ${{ matrix.runtime }}

  # The iOS runtime packs build on macOS runners, so they run in the macos lane.
  mobile_runtime_packs_ios:
    needs: [validation_scope, lanes]
    if: ${{ needs.validation_scope.outputs.full == 'true' && needs.lanes.outputs.macos == 'true' }}
    name: test (${{ matrix.runtime }})
    strategy:
      fail-fast: false
      matrix:
        runtime: [runtime-ios-arm64, runtime-ios-simulator-arm64]
    runs-on: macos-15
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@v4
      - uses: ./.github/actions/mobile-runtime-pack
        with:
          runtime: ${{ matrix.runtime }}

  # Retain the pre-matrix "test" check for branch protection and badges.
  # Require this check on the stack base. Upper layers must not pass before
  # full validation, so untested groups cannot merge. Merge bottom-up.
  test:
    needs:
      [
        validation_scope,
        lanes,
        code_quality,
        native_macos,
        tests,
        tests_macos,
        native_linux,
        effects,
        bootstrap_seed,
        bootstrap,
        linux_host_clang,
        ts7_parity,
        checker_identity,
        llvm_artifacts_linux_x64,
        llvm_artifacts_macos_arm64,
        llvm_artifacts_macos_x64,
        windows_cli,
        llvm_artifacts_windows_x64,
        mobile_runtime_packs,
        mobile_runtime_packs_ios,
      ]
    # Run even after failed or cancelled lanes: skipped required jobs allow merging.
    if: ${{ always() }}
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - name: All lanes green
        run: |
          test "${{ needs.validation_scope.result }}" = success
          test "${{ needs.code_quality.result }}" = success
          case "${{ needs.validation_scope.outputs.full }}" in
            true)
              test "${{ needs.lanes.result }}" = success
              # A lane job passes when it succeeded, or when it was skipped because its lane is off.
              lane() { [ "$2" = success ] || { [ "$3" = false ] && [ "$2" = skipped ]; } || { echo "$1: $2 (lane $3)"; exit 1; }; }
              lane native_macos "${{ needs.native_macos.result }}" "${{ needs.lanes.outputs.macos }}"
              lane tests "${{ needs.tests.result }}" "${{ needs.lanes.outputs.linux }}"
              lane tests_macos "${{ needs.tests_macos.result }}" "${{ needs.lanes.outputs.macos }}"
              lane native_linux "${{ needs.native_linux.result }}" "${{ needs.lanes.outputs.linux }}"
              lane effects "${{ needs.effects.result }}" "${{ needs.lanes.outputs.effects }}"
              lane bootstrap_seed "${{ needs.bootstrap_seed.result }}" "${{ needs.lanes.outputs.bootstrap }}"
              lane bootstrap "${{ needs.bootstrap.result }}" "${{ needs.lanes.outputs.bootstrap }}"
              lane linux_host_clang "${{ needs.linux_host_clang.result }}" "${{ needs.lanes.outputs.linux }}"
              lane ts7_parity "${{ needs.ts7_parity.result }}" "${{ needs.lanes.outputs.linux }}"
              lane checker_identity "${{ needs.checker_identity.result }}" "${{ needs.lanes.outputs.linux }}"
              lane llvm_artifacts_linux_x64 "${{ needs.llvm_artifacts_linux_x64.result }}" "${{ needs.lanes.outputs.linux }}"
              lane llvm_artifacts_macos_arm64 "${{ needs.llvm_artifacts_macos_arm64.result }}" "${{ needs.lanes.outputs.macos }}"
              lane llvm_artifacts_macos_x64 "${{ needs.llvm_artifacts_macos_x64.result }}" "${{ needs.lanes.outputs.macos }}"
              lane windows_cli "${{ needs.windows_cli.result }}" "${{ needs.lanes.outputs.linux }}"
              lane llvm_artifacts_windows_x64 "${{ needs.llvm_artifacts_windows_x64.result }}" "${{ needs.lanes.outputs.linux }}"
              lane mobile_runtime_packs "${{ needs.mobile_runtime_packs.result }}" "${{ needs.lanes.outputs.linux }}"
              lane mobile_runtime_packs_ios "${{ needs.mobile_runtime_packs_ios.result }}" "${{ needs.lanes.outputs.macos }}"
              ;;
            false)
              echo "::notice::Full CI is deferred until this PR becomes the lowest unmerged layer. Merge the stack from the bottom up."
              exit 1
              ;;
            *)
              echo "Invalid CI scope"
              exit 1
              ;;
          esac