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Skip CI until last commit

Open SWE will push a commit after every change to the repository. This will cause your GitHub CI workflows to run for every commit, which is unnecessary. To prevent this, Open SWE supports adding an environment variable which will append [skip ci] to the commit message. This can be used to make GitHub skip CI for that commit. Below are instructions showing how to use this to skip creating Vercel CI preview deployments on every commit:
1

Set the environment variable

Set the environment variable SKIP_CI_UNTIL_LAST_COMMIT to true in Open SWE’s environment variables:apps/open-swe/.env
SKIP_CI_UNTIL_LAST_COMMIT="true"
2

Add custom 'Ignored Build Step' in Vercel

Add a custom ‘Ignored Build Step’ in Vercel to skip CI when commit messages contain the string [skip ci].
  1. Navigate to your Vercel project dashboard
  2. Go to Settings → Git tab
  3. Scroll to Ignored Build Step section
  4. Select Custom and add the following script:
Vercel Custom Build Step Screenshot
git log -1 --pretty=oneline --abbrev-commit | grep -w "\[skip ci\]" && exit 0 || exit 1
3

Test the configuration (optional)

To verify your setup works without closing your terminal, use this safe testing command:
# Safe local testing - won't close your terminal
if git log -1 --pretty=oneline --abbrev-commit | grep -w "\[skip ci\]"; then
    echo "Found [skip ci] - Vercel would skip this build"
else
    echo "No [skip ci] found - Vercel would proceed with build"
fi
Test with both types of commits:
  • Commits with [skip ci] should show “Vercel would skip this build”
  • Commits without [skip ci] should show “Vercel would proceed with build”

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How it works

  1. During task execution: Open SWE includes [skip ci] in commit messages
  2. Vercel behavior: Skips creating preview deployments for these commits (script exits with code 1)
  3. Task completion: Open SWE pushes a final commit without [skip ci] to trigger deployment (script exits with code 0)
  4. Result: Only one preview deployment per Open SWE task