# Product Engineering — Fullstack Engineering Standards

> Internal fullstack engineering standards for the frontend and backend teams. Each section below is available as clean, direct markdown, no HTML parsing needed.

## Foundations

- [Introduction](https://swe.ardhiraka.com/swe/1-introduction.md): Purpose, scope, and how to propose a change to this standard.
- [Technology Selection & Current Stack](https://swe.ardhiraka.com/swe/2-technology-selection.md): Selection criteria, the current approved stack, and the polyglot policy.
- [Repository & Project Structure](https://swe.ardhiraka.com/swe/3-repository-structure.md): Monorepo vs multi-repo criteria and structure by layer responsibility.
- [Code Quality & Collaboration](https://swe.ardhiraka.com/swe/4-code-quality.md): PR checklist, linting principles, and the commit and branching convention.

## Frontend & Backend

- [Frontend & UI Guidelines](https://swe.ardhiraka.com/swe/5-frontend-ui.md): Component strategy, styling conventions, forms, and accessibility baseline.
- [Backend & Data Architecture](https://swe.ardhiraka.com/swe/6-backend-data.md): Service boundaries, persistence standards, and data modeling.

## Architecture & Principles

- [System Architecture & Service Communication](https://swe.ardhiraka.com/swe/7-system-architecture.md): When to use internal RPC, REST, GraphQL, and event-driven messaging.
- [Engineering Principles & Design Patterns](https://swe.ardhiraka.com/swe/8-engineering-principles.md): Design for failure, SOLID, design patterns, YAGNI, and feature flagging.
- [Application State & Content Handling](https://swe.ardhiraka.com/swe/9-application-state.md): Server vs client state, caching, validation, search, and file handling.

## Operations & Quality

- [Error Handling & Resilience](https://swe.ardhiraka.com/swe/10-error-handling.md): Consistent error shapes, UI error states, retries, and background jobs.
- [Security](https://swe.ardhiraka.com/swe/11-security.md): Env var rules, auth, input validation, secrets, and middleware standards.
- [Performance Guidelines](https://swe.ardhiraka.com/swe/12-performance.md): Asset optimization, bundle budgets, code splitting, and query performance.
- [Testing Strategy](https://swe.ardhiraka.com/swe/13-testing-strategy.md): Test scope by layer, mocking convention, smoke tests, and coverage.

## Reference

- [Appendix](https://swe.ardhiraka.com/swe/14-appendix.md): Glossary, ADR convention, onboarding pointer, and the change log.

## Optional

- [Agent Plugin](https://swe.ardhiraka.com/agent-plugin.md): install, update, uninstall, and skill reference
- `abangku`: full standards audit or deep review
- `abangku-quick-review`: fast PR gate on security, errors, code quality
- `abangku-frontend`: component, styling, state, or accessibility focus
- `abangku-backend`: service, data, or API contract focus
- `abangku-security`: auth, secrets, or hardening focus
- `abangku-architecture`: stack choices, boundaries, or patterns
- `abangku-testing-swe`: test planning or review
- `abangku-onboarding`: new repo or dev, AGENTS.md setup
- `abangku-pr-description`: draft a PR description before opening it
- `abangku-review-response`: answer one standards question with a citation
- [Content and skills fingerprints](https://swe.ardhiraka.com/plugin/manifest.json): compare to the `manifest.json` in an installed skill to detect staleness
- Install agent skills: `curl -fsSL https://swe.ardhiraka.com/install.sh | bash`
- Update skills: `curl -fsSL https://swe.ardhiraka.com/install.sh | bash -s -- --update`
- Refresh section cache only: `curl -fsSL https://swe.ardhiraka.com/install.sh | bash -s -- --refresh-cache`
- Windows: `irm https://swe.ardhiraka.com/install.ps1 | iex` or `irm https://swe.ardhiraka.com/install.ps1 -OutFile install.ps1; .\install.ps1`