pr-ai-disclosure.yml

name: Check AI disclosure in PRs

on:
  pull_request_target:
    types: [opened, reopened, edited]

permissions:
  pull-requests: write
  issues: write

jobs:
  check-disclosure:
    name: Check AI disclosure section
    runs-on: ubuntu-latest
    steps:
      - name: Check if AI label is already present
        id: labels
        uses: actions/github-script@v9
        with:
          script: |
            const hasAiLabel = context.payload.pull_request.labels.some(
              l => l.name.startsWith("AI: ")
            );
            core.setOutput("has_ai_label", hasAiLabel);

      - name: Validate that PR body contains AI disclosure
        id: check
        uses: actions/github-script@v8
        with:
          script: |
            // Remove template hints.
            const body = (context.payload.pull_request.body || "")
              .replace(/\r/g, "")
              .replace(/<!--[\s\S]*?-->/g, "");

            // Match first non-empty line that doesn't start with '#'
            const heading = `##+\\s+Declaration of AI-Tools \\/ LLMs usage:?`;
            const sectionRegex = new RegExp(
              `^${heading}\\s*(^\\s*[^#\\s].*$)`,
              "m"
            );

            const match = body.match(sectionRegex);
            const missing = !match || match[1].trim().length === 0;

            core.setOutput("is_declaration_missing", String(missing));

      - name: Remove AI label if declaration exists
        if: steps.check.outputs.is_declaration_missing == 'false'
        uses: actions/github-script@v9
        with:
          script: |
            const prNumber = context.payload.pull_request.number;
            try {
              await github.rest.issues.removeLabel({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                name: "AI: Declaration Missing"
              });
            } catch (error) {
              // Ignore if the label does not exist
              if (error.status !== 404) {
                throw error;
              }
            }

      - name: Comment on PR and add labels
        uses: actions/github-script@v9
        if: >-
          steps.check.outputs.is_declaration_missing == 'true' &&
          steps.labels.outputs.has_ai_label != 'true'
        with:
          script: |
            const prNumber = context.payload.pull_request.number;
            const user = context.payload.pull_request.user.login;
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              body: `Hey @${user}, thank you for your contribution to RIOT!

              Please note that we require for all PRs to RIOT a declaration of AI-Tools / LLMs usage. It appears as if this section is missing in your PR. Please copy and fill in the section from .github/PULL_REQUEST_TEMPLATE.md.

              Thank you!`
            });
            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              labels: ["AI: Declaration Missing"]
            });