angular-split · shlomoa · Feb 9, 2026 · Feb 9, 2026 · Feb 9, 2026 · Feb 9, 2026
diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
@@ -0,0 +1,71 @@
+# Copilot Instructions — angular-split
+
+Quick-start operating manual for this repo.
+Rules are repo specific and override any general rules you may have been trained on.
+
+- applicable to git branch update_to_angular_21
+- This document should be constantly revised and updated.
+
+There are two main sections in this document representing two strategies for working with github copilot:
+- Interactive via chat mode of operation rules
+- Automatic (code generation) mode of operation rules
+
+# expectations from github copilot
+Always ask user for guidance.
+- Provide best in class respose:
+  - accurate, correct, complete, concise, clear, and relevant.
+- Provide best in class code:
+  - correct, clean, efficient, and well documented.
+- Learn cutting edge techniques - ask user for guidance.
+- Use best known methods and practices - 
+
+# purpose of this activity
+- Update the codebase to Angular 21.
+- Update all dependencies to their latest versions as possible.
+
+# Interactive (chat) mode of operation rules
+
+## KISS rules (general)
+KISS stands for "Keep It Stupid Simple". This is a design principle that states that most systems work best if they are kept simple.
+Simple is:
+- minimal in code and features.
+- using existing reusable components or create reusable components when needed.
+- structured in a way that is:
+  - easy to navigate and maintain.
+  - built correctly the first time - correct by construction.
+  - always verifiable
+Stupid is:
+- not over-engineered.
+- not over-complicated.
+- not over-designed.
+- every dummy even github copilot could understand it.
+
+## Single sources of truth
+Respect the single source of truth principle. definitions are made once in a single place, further use of this definition is done by referencing (for documenting) or importing (in code).
+
+## Collaboration rules (repo‑specific)
+- read user instructions carefully.
+- fix typos in them.
+- clarify any:
+  - ambiguities.
+  - missing information.
+- elaborate on any:
+  - vague instructions.
+  - incomplete instructions.
+- discuss options with the user, if there are any.
+- Develop a detailed plan with the user, that includes:
+  - tasks, sub tasks
+  - validation steps in all stages of the process.
+  - enumerated action plan.
+
+## Mode of operation
+- Stop if context is unclear.
+- Start by gaining context - ask user for help.
+- Wait for user instructions.
+- Execute plans for actions.
+- Validate results with the user.
+- Document everything.
+
+# Automatic (code generation) mode of operation rules
+
+None yet.
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [20.x, 22.x]
+        node-version: [22.x, 24.x]
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v4

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [20.x, 22.x]
+        node-version: [22.x, 24.x]
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v4

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [20.x, 22.x]
+        node-version: [22.x, 24.x]
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v4

diff --git a/.gitignore b/.gitignore
@@ -41,4 +41,5 @@ testem.log
 # System Files
 .DS_Store
 Thumbs.db
-.wireit
+.wireit
+PLAN.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 21.0.0 (2026-02-09)
+
+- feat: update to angular 21
+- feat: update to angular 20
+- feat: update ngx-bootstrap to v21
+- refactor: migrate to inject() function
+
 ## 19.0.0 (2025-02-01)
 
 - feat: support node v22 (#470) ([52ee663](https://github.com/angular-split/angular-split/commit/52ee663)), closes [#470](https://github.com/angular-split/angular-split/issues/470)

diff --git a/angular.json b/angular.json
@@ -15,7 +15,7 @@
       },
       "architect": {
         "build": {
-          "builder": "@angular-devkit/build-angular:application",
+          "builder": "@angular/build:application",
           "options": {
             "outputPath": {
               "base": "dist/angular-split-app"
@@ -46,7 +46,7 @@
           "defaultConfiguration": "production"
         },
         "serve": {
-          "builder": "@angular-devkit/build-angular:dev-server",
+          "builder": "@angular/build:dev-server",
           "options": {
             "buildTarget": "angular-split-app:build"
           },
@@ -79,7 +79,7 @@
       "prefix": "as",
       "architect": {
         "build": {
-          "builder": "@angular-devkit/build-angular:ng-packagr",
+          "builder": "@angular/build:ng-packagr",
           "options": {
             "tsConfig": "projects/angular-split/tsconfig.lib.json",
             "project": "projects/angular-split/ng-package.json"
@@ -96,5 +96,31 @@
   },
   "cli": {
     "analytics": "4af3d67b-15ea-40d9-8c3a-998fb02958b9"
+  },
+  "schematics": {
+    "@schematics/angular:component": {
+      "type": "component"
+    },
+    "@schematics/angular:directive": {
+      "type": "directive"
+    },
+    "@schematics/angular:service": {
+      "type": "service"
+    },
+    "@schematics/angular:guard": {
+      "typeSeparator": "."
+    },
+    "@schematics/angular:interceptor": {
+      "typeSeparator": "."
+    },
+    "@schematics/angular:module": {
+      "typeSeparator": "."
+    },
+    "@schematics/angular:pipe": {
+      "typeSeparator": "."
+    },
+    "@schematics/angular:resolver": {
+      "typeSeparator": "."
+    }
   }
 }