Custom action output

.github/actions/my-action/action.yml

@@ -0,0 +1,19 @@
+name: my action
+description: Set some variable as output
+inputs:
+  my_input:
+    description: 'Some input'
+    required: true
+outputs:
+  my_output:
+    description: 'The output'
+    value: ${{ steps.my-step.outputs.my_output }}
+runs:
+  using: composite
+  steps:
+    - id: my-step
+      name: Step to write output
+      run: |
+        echo ${{ inputs.my_input }}
+        echo "my_output='output from my action.'" >> $GITHUB_OUTPUT
+      shell: bash

.github/workflows/test.yml

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+name: Test
+
+on: [push,pull_request]
+
+jobs:
+    job1:
+        runs-on: ubuntu-latest
+        outputs:
+            my_output_from_job: ${{ steps.my-action.outputs.my_output }}
+        steps:
+            - uses: actions/checkout@v4
+            - id: my-action
+              uses: ./.github/actions/my-action
+              with:
+                my_input: 'Input from job1'
+            - name: use output from the custom action
+              run: echo ${{ steps.my-action.outputs.my_output }}
+
+    job2:
+        runs-on: ubuntu-latest
+        needs: job1
+        steps:
+            - run: |
+                echo ${{ needs.job1.outputs.my_output_from_job }}