# T-015: Build Smoke Test — CI Passes on Windows, VST3 DLL Produced, `task build` Clean

**Type:** Task | **Phase:** 0 | **Autonomy:** `agent:review-required`  
**Stack:** `stack:infra` | **Version:** v0.1 | **Iteration:** iter-1 | **Effort:** S (half-day)

> ⚠️ **Scope:** Add a `build` job to the GitHub Actions CI workflow (`.github/workflows/ci.yml`) that runs `task build` on `windows-latest`, verifies the `.exe` exists and is under 30 MB, and verifies the VST3 bundle exists. This is the Day 1 exit criterion proof. If any prior task left broken code, this job surfaces it.

---

## Prerequisites
- [ ] T-001–T-014 all merged (or all in `status:roadmap` with known blockers)
- [ ] T-007 merged — `Taskfile.yml` with `task build` defined
- [ ] T-008 merged — CI workflow exists with `check` and `test` jobs

## Acceptance Criteria
- [ ] New `build` job added to `.github/workflows/ci.yml` after `test` job
- [ ] `build` job runs only on push to `main` (not on every PR — too slow)
- [ ] `task build` runs: `cargo tauri build` + `cargo xtask bundle synesthesia-plugin --release`
- [ ] CI step verifies `.exe` exists at `kansas/target/release/synesthesia.exe`
- [ ] CI step verifies `.exe` size is < 30 MB (fails if Chromium accidentally bundled)
- [ ] CI step verifies `target/bundled/Synesthesia.vst3/` directory exists
- [ ] Build job result posted as a comment on the triggering commit
- [ ] `cargo check --workspace` and `pnpm typecheck` still pass

## Add to `.github/workflows/ci.yml`

```yaml
  # ── Build job (push to main only — ~10 min, too slow for every PR) ─────────
  build:
    name: Full Build
    runs-on: windows-latest
    needs: [check, test]
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'

    steps:
      - uses: actions/checkout@v4

      - uses: dtolnay/rust-toolchain@nightly
        with:
          components: clippy, rustfmt

      - uses: Swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-build-${{ hashFiles('Cargo.lock') }}

      - uses: actions/setup-node@v4
        with:
          node-version: '20'

      - uses: pnpm/action-setup@v4
        with:
          version: 9
          run_install: false

      - name: Install frontend deps
        run: pnpm install --frozen-lockfile

      - uses: arduino/setup-task@v2
        with:
          version: 3.x
          repo-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Install WebView2 (if missing)
        run: |
          $installer = "MicrosoftEdgeWebview2Setup.exe"
          Invoke-WebRequest "https://go.microsoft.com/fwlink/p/?LinkId=2124703" -OutFile $installer
          Start-Process $installer -ArgumentList "/silent /install" -Wait
        shell: powershell
        continue-on-error: true  # Already installed on windows-latest

      - name: Build all targets
        run: task build

      - name: Verify standalone exe
        shell: bash
        run: |
          EXE="kansas/target/release/synesthesia.exe"
          [ -f "$EXE" ] || { echo "✗ $EXE not found"; exit 1; }
          SIZE=$(stat -c%s "$EXE")
          echo "exe size: $((SIZE / 1024 / 1024)) MB"
          [ "$SIZE" -lt 31457280 ] || { echo "✗ exe > 30 MB — Chromium may have been bundled"; exit 1; }
          echo "✓ Standalone exe OK"

      - name: Verify VST3 bundle
        shell: bash
        run: |
          BUNDLE="target/bundled/Synesthesia.vst3"
          [ -d "$BUNDLE" ] || { echo "✗ $BUNDLE not found"; exit 1; }
          echo "✓ VST3 bundle OK"

      - name: Upload build artifacts
        uses: actions/upload-artifact@v4
        with:
          name: synesthesia-build-${{ github.sha }}
          path: |
            kansas/target/release/synesthesia.exe
            target/bundled/
          retention-days: 7
```

---

## GitHub CLI
```bash
gh issue create \
  --title "T-015: Build smoke test — CI full build on Windows, VST3 DLL verified" \
  --label "type:task,stack:infra,agent:review-required,priority:critical,status:ready,day:1" \
  --body-file T-015.md
```

**Parent:** GENESIS | **Blocks:** Day 1 exit criterion | **Blocked By:** T-001–T-014, T-007, T-008