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4 hours ago
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Drop-in Codex AI agent with GitHub Models
This is a drop-in, zero-config Actions harness for OpenAI's Codex agent. It uses GitHub Models for inference, so you don't need to set up any secrets - just copy-pasting the action into your repo should work as-is.
You may need to go into your settings and check the "allow Actions to open PRs" checkbox.
To use it, open an issue in your repo with [codex] in the issue name.
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| name: Codex on GitHub Models | |
| on: | |
| issues: | |
| types: [opened] | |
| jobs: | |
| process-issue: | |
| if: contains(github.event.issue.title, '[codex]') | |
| runs-on: ubuntu-latest | |
| permissions: | |
| contents: write | |
| issues: write | |
| pull-requests: write | |
| models: read | |
| steps: | |
| - name: Checkout repository | |
| uses: actions/checkout@v3 | |
| - name: Setup Node.js | |
| uses: actions/setup-node@v3 | |
| with: | |
| node-version: '22' | |
| - name: Install Codex CLI | |
| run: npm install -g @openai/codex | |
| - name: Process issue with Codex | |
| env: | |
| OPENAI_API_KEY: ${{ secrets.GITHUB_TOKEN }} | |
| ISSUE_BODY: ${{ github.event.issue.body }} | |
| ISSUE_NUMBER: ${{ github.event.issue.number }} | |
| ISSUE_TITLE: ${{ github.event.issue.title }} | |
| GH_TOKEN: ${{ secrets.GITHUB_TOKEN }} | |
| run: | | |
| INSTRUCTION="$ISSUE_TITLE --- $ISSUE_BODY" | |
| BRANCH_NAME="codex/issue-$ISSUE_NUMBER" | |
| git checkout -b $BRANCH_NAME | |
| export OPENAI_BASE_URL=https://models.github.ai/inference | |
| # any provider string would work here, it's just so codex knows it's using a custom model | |
| codex --approval-mode full-auto --provider github --model openai/gpt-4.1 --quiet "$INSTRUCTION" | |
| if [[ -n $(git status --porcelain) ]]; then | |
| git config user.name "GitHub Models Codex Bot" | |
| git config user.email "[email protected]" | |
| git add . | |
| git commit -m "Codex changes for issue #$ISSUE_NUMBER" | |
| git push origin $BRANCH_NAME | |
| # Create PR and comment on issue using the same token | |
| gh pr create --title "Codex: ${{ github.event.issue.title }}" \ | |
| --body "Auto-generated by Codex for issue #$ISSUE_NUMBER" \ | |
| --base ${{ github.event.repository.default_branch }} \ | |
| --head $BRANCH_NAME | |
| gh issue comment $ISSUE_NUMBER --body "Codex created a PR for this issue" | |
| else | |
| gh issue comment $ISSUE_NUMBER --body "Codex processed this issue but made no changes" | |
| fi |
