---
phase: 07-native-distribution
plan: 01
subsystem: native-addon-distribution
tags: [prebuild, native, node-gyp-build, distribution]
dependency_graph:
  requires: [native/build/Release/dwm-capture.node]
  provides: [prebuilds/win32-x64/node.napi.node, node-gyp-build loader]
  affects: [src/capture/targets/dwm-capture.ts, package.json]
tech_stack:
  added: []
  patterns: [node-gyp-build prebuild resolution, cross-platform npm scripts]
key_files:
  created: []
  modified:
    - package.json
    - src/capture/targets/dwm-capture.ts
    - .gitignore
decisions:
  - Used manual prebuild copy instead of prebuildify (cmake-js incompatibility)
  - Used Node.js fs calls in prebuild script for Windows cmd.exe compatibility
metrics:
  duration: ~2 minutes
  completed: 2026-04-13T07:49:20Z
  tasks_completed: 2
  tasks_total: 2
---

# Phase 7 Plan 1: Prebuild Infrastructure Summary

Prebuilt binary distribution for native DWM capture addon using node-gyp-build resolution from prebuilds/win32-x64/node.napi.node

## What Was Done

### Task 1: Create prebuild infrastructure and update loader

- Created `prebuilds/win32-x64/` directory structure matching node-gyp-build's expected resolution path
- Updated `dwm-capture.ts` to use `node-gyp-build` instead of hardcoded `../../../native/build/Release/dwm-capture.node` path
- Added `prebuild` script to package.json that copies cmake-js output to the correct prebuild location
- Added `files` field to package.json including `["dist", "prebuilds", ".claude-plugin", ".mcp.json"]` for npm publish
- Added `prebuilds/` to `.gitignore` (build artifact, ships via npm tarball only)

### Task 2: End-to-end validation

All 5 validation tests passed:
1. `npm run prebuild` creates prebuilds/win32-x64/node.napi.node (185KB)
2. `node-gyp-build` resolves to the prebuild binary
3. `isDwmCaptureAvailable()` returns true via the new loader
4. MCP server starts successfully with all tools available
5. `npm pack --dry-run` includes prebuilds/win32-x64/node.napi.node in the package

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Cross-platform prebuild script**
- **Found during:** Task 2, Test 1
- **Issue:** The prebuild script used Unix commands (`mkdir -p`, `cp`) which fail on Windows cmd.exe where npm runs scripts
- **Fix:** Replaced with inline Node.js script using `fs.mkdirSync` and `fs.copyFileSync`
- **Files modified:** package.json
- **Commit:** fd47792

## Commits

| Task | Commit | Message |
|------|--------|---------|
| 1 | 560147d | feat(07-01): prebuild infrastructure and node-gyp-build loader |
| 1-fix | fd47792 | fix(07-01): use cross-platform prebuild script |

## Verification Results

| Check | Result |
|-------|--------|
| prebuilds/win32-x64/node.napi.node exists | PASS |
| package.json has prebuild script | PASS |
| package.json files field includes prebuilds | PASS |
| dwm-capture.ts uses node-gyp-build | PASS |
| node-gyp-build resolves binary | PASS |
| .gitignore includes prebuilds/ | PASS |
| npm pack includes prebuild | PASS |
| MCP server starts | PASS |

## Self-Check: PASSED

All files exist. All commits verified.