META.yml

slug: angularjs-to-angular-18
type: instructions
version: 0.1.0

upstream:
  repo: github/awesome-copilot
  base: staged

# Files in dist/ that get rsynced into the upstream tree.
# For type=instructions, exactly one file at dist/<slug>.instructions.md
# is copied to instructions/<slug>.instructions.md upstream.
target_paths:
  - instructions/angularjs-to-angular-18.instructions.md

description: |
  Migration guidance for AngularJS 1.x codebases to Angular 18: incremental
  ngUpgrade hybrid, standalone-default components, signals, control flow,
  function-based interceptors / guards, provideHttpClient + provideRouter,
  Vitest. Catches 62 LLM regressions across three modes: AngularJS 1.x patterns
  emitted for "Angular" requests, Angular 2-17 legacy patterns vs Angular 18
  idioms, and migration-specific mistakes (big-bang advice without ngUpgrade,
  literal $rootScope.$broadcast ports, missing downgradeInjectable). Pins
  AngularJS 1.x is EOL since Dec 31 2021 with unpatched CVE-2024-21490 (ReDoS
  in ng-srcset) - HeroDevs NES or OpenLogic are the only options to stay
  patched without migration.