Angular Modernization Angular Standalone First Adoption V19

Name: Angular Modernization Angular Standalone First Adoption V19
Author: janpereira-dev

ASecurity

Adopt standalone components and bootstrap APIs in bounded post-upgrade modernization slices after Angular 19 is stable. Use when reducing NgModule usage incrementally or converting bounded feature areas without mixing the change into a version hop.

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Added 10/2/2026

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Scanned 10/2/2026

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SKILL.md

---
id: angular.modernization.angular-standalone-first-adoption-v19
name: Angular Standalone First Adoption v19
description: >
  Adopt standalone components and bootstrap APIs in bounded post-upgrade modernization slices after Angular 19 is stable. Use when reducing NgModule usage incrementally or converting bounded feature areas without mixing the change into a version hop.
stack:
  - Angular
  - TypeScript
category: modernization
status: stable
version: 0.10.0
owner: NgAutoPilot
triggers:
  - standalone adoption
  - standalone components
  - bootstrapApplication
  - NgModule reduction
compatibility:
  angular:
    min: "19"
---

# Angular Standalone First Adoption v19

## Purpose

Adopt standalone components and bootstrap APIs in bounded modernization slices after Angular 19 is stable.

## When to Use

- The app is already on stable Angular 19.
- The team wants to reduce `NgModule` usage incrementally.
- The change is modernization, not a version upgrade.

## When Not to Use

- The app is still in a version hop.
- The app is not stable enough for architectural refactoring.

## Required Inputs

- feature module boundaries
- routing setup
- shared declarations/modules
- bootstrap entry points
- tests for the target slice

## Procedure

1. Select a bounded feature area.
2. Convert leaf components first.
3. Update routing and bootstrap paths.
4. Remove obsolete declarations only after the slice is stable.
5. Validate build, tests, and runtime behavior.

## Do

- Prefer incremental conversion.
- Keep shared module changes small.
- Validate lazy routes and bootstrap paths.

## Do Not

- Do not convert the whole app in one pass.
- Do not mix standalone adoption with version hops.
- Do not remove modules that still provide shared declarations.

## Review Checklist

- [ ] Slice is bounded.
- [ ] Routing still works.
- [ ] Bootstrap still works.
- [ ] Tests pass.
- [ ] Remaining NgModule debt is documented.

## Expected Output

1. Slice converted to standalone.
2. Remaining module dependencies.
3. Test result.
4. Follow-up list.

## Exit Criteria

- Adoption is incremental.
- The next slice is clear.

Attribution

janpereira-dev

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--- id: angular.modernization.angular-standalone-first-adoption-v19 name: Angular Standalone First Adoption v19 description: > Adopt standalone components and bootstrap APIs in bounded post-upgrade modernization slices after Angular 19 is stable. Use when reducing NgModule usage incrementally or converting bounded feature areas without mixing the change into a version hop. stack: - Angular - TypeScript category: modernization status: stable version: 0.10.0 owner: NgAutoPilot triggers: - standalone adoption - standalone components - bootstrapApplication - NgModule reduction compatibility: angular: min: "19" --- # Angular Standalone First Adoption v19 ## Purpose Adopt standalone components and bootstrap APIs in bounded modernization slices after Angular 19 is stable. ## When to Use - The app is already on stable Angular 19. - The team wants to reduce `NgModule` usage incrementally. - The change is modernization, not a version upgrade. ## When Not to Use - The app is still in a version hop. - The app is not stable enough for architectural refactoring. ## Required Inputs - feature module boundaries - routing setup - shared declarations/modules - bootstrap entry points - tests for the target slice ## Procedure 1. Select a bounded feature area. 2. Convert leaf components first. 3. Update routing and bootstrap paths. 4. Remove obsolete declarations only after the slice is stable. 5. Validate build, tests, and runtime behavior. ## Do - Prefer incremental conversion. - Keep shared module changes small. - Validate lazy routes and bootstrap paths. ## Do Not - Do not convert the whole app in one pass. - Do not mix standalone adoption with version hops. - Do not remove modules that still provide shared declarations. ## Review Checklist - [ ] Slice is bounded. - [ ] Routing still works. - [ ] Bootstrap still works. - [ ] Tests pass. - [ ] Remaining NgModule debt is documented. ## Expected Output 1. Slice converted to standalone. 2. Remaining module dependencies. 3. Test result. 4. Follow-up list. ## Exit Criteria - Adoption is incremental. - The next slice is clear.