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@Copilot Copilot AI commented Oct 10, 2025

Problem

The GitHub Actions workflow file .github/workflows/main.yml had an invalid YAML structure that caused the error:

Invalid workflow file
(Line: 1, Col: 14): A sequence was not expected

The file only contained a step definition fragment without the required workflow structure:

             - name: Deploy GitHub Pages site
  uses: actions/[email protected]
  with:
    # GitHub token
    token: # default is ${{ github.token }}
    ...

This is invalid because:

  • The step started with incorrect indentation at the root level
  • Missing required top-level keys (name, on, jobs)
  • No workflow triggers defined
  • No job wrapper around the deployment step

Solution

Created a complete, properly structured GitHub Actions workflow that deploys static content to GitHub Pages:

name: Deploy static content to Pages

on:
  push:
    branches: ["main"]
  workflow_dispatch:

permissions:
  contents: read
  pages: write
  id-token: write

concurrency:
  group: "pages"
  cancel-in-progress: false

jobs:
  deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Pages
        uses: actions/configure-pages@v4
      - name: Upload artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: '.'
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4

Key Changes

  • ✅ Added workflow name declaration
  • ✅ Added on triggers (push to main + manual workflow_dispatch)
  • ✅ Configured required permissions for Pages deployment
  • ✅ Added concurrency control to prevent deployment conflicts
  • ✅ Wrapped deployment step in proper jobs structure with environment configuration
  • ✅ Added complete deployment workflow: checkout → setup → upload → deploy
  • ✅ Used latest action versions (@v4 for checkout, configure-pages, deploy-pages)

The workflow now follows GitHub's official pattern for static site deployment and will successfully deploy the portfolio site to GitHub Pages.

Original prompt

whats the issue

         - name: Deploy GitHub Pages site

Check failure on line 1 in .github/workflows/main.yml

GitHub Actions
/ .github/workflows/main.yml
Invalid workflow file

(Line: 1, Col: 14): A sequence was not expected
uses: actions/[email protected]
with:
# GitHub token
token: # default is ${{ github.token }}
# Time in milliseconds after which to timeout and cancel the deployment (default: 10 minutes)
timeout: # optional, default is 600000
# Maximum number of status report errors before cancelling a deployment (default: 10)
error_count: # optional, default is 10
# Time in milliseconds between two deployment status report (default: 5 seconds)
reporting_interval: # optional, default is 5000
# Name of the artifact to deploy
artifact_name: # optional, default is github-pages
# Is this attempting to deploy a pull request as a GitHub Pages preview site? (NOTE: This feature is only in alpha currently and is not available to the public!)
preview: # optional, default is false


💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

@Copilot Copilot AI changed the title [WIP] Fix invalid workflow file for GitHub Pages deployment Fix invalid GitHub Actions workflow file structure Oct 10, 2025
Copilot finished work on behalf of rajeshkanaka October 10, 2025 20:18
@Copilot Copilot AI requested a review from rajeshkanaka October 10, 2025 20:18
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2 participants