Skip PR creation when only lastUpdated metadata changes

[Copilot]

The model sync workflow created PR #291 containing only a metadata date change (lastUpdated: "2026-02-20" → "2026-02-23"). This adds detection to skip PR creation for metadata-only updates and includes workflow run links for traceability.

Changes

Prompt refinement (.github/workflows/prompts/sync-models-prompt.md)

• Instruct Copilot CLI to update lastUpdated only when models are added

Change detection (.github/workflows/check-models.yml)

• Detect date-only changes using grep -E '^[+-][^+-]' to count actual diff lines
• Skip PR creation when exactly 2 lines change and both contain "lastUpdated"
• Add workflow run link to PR body: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}

Detection Logic

DIFF_OUTPUT=$(git diff src/modelPricing.json)
CHANGED_LINES=$(echo "$DIFF_OUTPUT" | grep -E '^[+-][^+-]' | wc -l)

if [ "$CHANGED_LINES" -eq 2 ]; then
  if echo "$DIFF_OUTPUT" | grep -E '^[+-][^+-]' | grep -v '"lastUpdated"' | wc -l | grep -q '^0$'; then
    if git diff --quiet src/tokenEstimators.json; then
      echo "changed=false" >> $GITHUB_OUTPUT  # Skip PR
    fi
  fi
fi

Future runs will skip PRs for metadata-only changes while still creating PRs with workflow links when actual model updates occur.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/rajbos/github-copilot-token-usage/actions/workflows/check-models.yml
  • Triggering command: /usr/bin/gh gh run list --workflow=check-models.yml --limit 30 --json createdAt,number,conclusion,event,url (http block)
• https://api.github.com/repos/rajbos/github-copilot-token-usage/actions/workflows/check-models.yml/runs
  • Triggering command: /usr/bin/curl curl -s -H Accept: application/vnd.github+json REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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