docs: Nx Migration Specification and Implementation Plan #4141
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- Add comprehensive migration guide with 5 milestones - Document current state, blockers, and risks - Provide detailed task breakdowns for each milestone - No time/personnel estimates as requested
Add comprehensive documentation for Backpack's migration to Nx build orchestration, including: - Complete migration specification with requirements and success criteria - 5-milestone implementation plan (8-10 weeks total) - Detailed milestone plans with tasks, validation, and rollback procedures - Architecture decisions resolving cache strategy, package structure, and Storybook integration - Performance targets and quality gates - Risk mitigation and rollback strategies Migration approach: - Incremental, non-breaking migration preserving all 96 packages - Local cache first (M1-3), optional Nx Cloud later (M4) - Keep existing build tools (Webpack, Babel, Gulp) as Nx targets - Maintain packages/ directory structure for minimal disruption Key milestones: - M1 (2-3w): Nx Foundation - Basic build orchestration + caching - M2 (2w): Testing & Linting - Jest, ESLint, Stylelint integration - M3 (1-2w): Dev Workflow - Storybook integration + HMR - M4 (2w): CI/CD - GitHub Actions + distributed caching - M5 (1w): Optimization - Documentation + team training Targets: - Build time: <110% baseline - Cache hit rate: >80% - CI time reduction: >20% - Zero breaking changes Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Pull request overview
This PR adds comprehensive documentation for migrating the Backpack Design System from custom npm scripts to Nx build orchestration. The documentation establishes a detailed 5-milestone plan spanning 8-10 weeks, with architectural decisions, risk mitigation strategies, and success criteria.
Changes:
- Complete migration specification with 55 functional/non-functional requirements
- Overall implementation plan with technical approach and architecture decisions
- 5 detailed milestone plans with tasks, validation criteria, and rollback procedures
- Quality checklists and navigation guides in both English and Chinese
Reviewed changes
Copilot reviewed 18 out of 18 changed files in this pull request and generated no comments.
Show a summary per file
| File | Description |
|---|---|
| specs/001-nx-migration/spec.md | Migration specification with requirements, user stories, and success criteria |
| specs/001-nx-migration/plan.md | Technical approach with architecture decisions and milestone overview |
| specs/001-nx-migration/README.md | Navigation guide (Chinese) with quick start and milestone summary |
| specs/001-nx-migration/milestones/*.md | 5 detailed milestone plans with tasks, validation, and rollback procedures |
| specs/001-nx-migration/checklists/requirements.md | Specification quality validation checklist |
| docs/nx-migration/*.md | Parallel documentation set with different technical approach |
| .mcp.json | MCP server configuration |
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Visit https://backpack.github.io/storybook-prs/4141 to see this build running in a browser. |
These files were generated in a separate session and should not be part of this PR. This PR should only include the specs/001-nx-migration documentation for the new migration plan. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Roger Tang (rogertang619)
changed the base branch from
main
to
WOODPECKER-4021
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Visit https://backpack.github.io/storybook-prs/4141 to see this build running in a browser. |
Keep the MCP server configuration in this PR. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
…s to README Enhanced the README with comprehensive sections: - Migration background explaining current challenges - Goals and requirements overview - Technical approach with key architecture decisions - Main blockers and risk mitigation strategies This provides readers with quick context before diving into detailed docs. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Only banana monorepo exists for integration, not "future". Corrected all 4 occurrences in the README. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Clarify that HMR stands for Hot Module Replacement (热模块替换) to help readers unfamiliar with the term. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Overview
This PR adds comprehensive documentation for migrating Backpack Design System from custom npm scripts to Nx build orchestration.
Purpose: Planning and specification review (no code changes yet)
Status: Ready for review
Migration Duration: 8-10 weeks across 5 milestones
📋 Documentation Added
Core Documents
specs/001-nx-migration/spec.md- Complete migration specificationspecs/001-nx-migration/plan.md- Overall implementation planspecs/001-nx-migration/README.md- Navigation guide (中文)Milestone Plans (5 detailed documents)
Milestone 1: Nx Foundation (2-3 weeks) - MVP
Milestone 2: Testing & Linting (2 weeks)
Milestone 3: Development Workflow (1-2 weeks)
Milestone 4: CI/CD & Caching (2 weeks)
Milestone 5: Optimization (1 week)
Quality Assurance
checklists/requirements.md- Specification quality validation🎯 Key Architecture Decisions
AD-001: Nx Cache Strategy
Decision: Hybrid approach (local cache → Nx Cloud)
AD-002: Package Structure
Decision: Preserve current
packages/directory structureAD-003: Storybook Integration
Decision: Custom integration (wrap existing config)
📊 Success Criteria
🔄 Migration Approach
Principles:
Out of Scope (for initial migration):
📚 References
This migration plan is based on the following resources and prior work:
Internal Skyscanner Nx Migrations
Nx Ecosystem Documentation
Backpack-Specific References
.specify/memory/constitution.mddecisions/directorymodern-sass-api.md,sizing-in-rem.md,versioning-rules.mdBuild Tools & Infrastructure
Related Monorepo Projects
🚀 Next Steps After Approval
Milestone 1 Spike (1 week)
Milestone 1 Implementation (2-3 weeks)
Subsequent Milestones (6-8 weeks)
📖 How to Review
Quick Review (10-15 min)
specs/001-nx-migration/README.md- Overviewspec.md- Requirements and scopeplan.mdThorough Review (1-2 hours)
spec.md- Full requirementsplan.md- Technical approachmilestone-1-nx-foundation.md- First milestone detailsFocus Areas for Review
🤔 Open Questions for Discussion
packages/structure?✅ Checklist
📞 Discussion
Please review and provide feedback on:
Note: This PR contains documentation only - no code changes. Implementation will happen in subsequent PRs following milestone approval.
Ready for review! 🎉