Summary

• Points snapit action to Shopify/snapit@support-oidc-authentication branch to test OIDC support

Why this PR must be merged to test

GitHub Actions issue_comment events (which trigger /snapit) always run workflows from the default branch, not from the PR branch. This means commenting /snapit on this PR will use the workflow from 2025-10, which still points to Shopify/snapit@main.

To test the OIDC-enabled snapit branch, this PR must be merged first.

Risk assessment

Low risk:

• If OIDC works → success, then we merge the snapit PR and update this repo to point back to @main
• If OIDC fails → the publish fails (no packages are published incorrectly), and we revert this change

Test plan

1. Merge this PR
2. Open a new PR with a changeset
3. Comment /snapit on that PR to verify OIDC authentication works

References

• Prior PR: Fix snapit: remove changeset pre exit from build script #3712
• Snapit PR: Support OIDC authentication for NPM publishing snapit#52
• Snapit Issue: Support OIDC authentication snapit#50
• Blocking Issue: https://github.com/shop/issues-admin-extensibility/issues/2137

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