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The 2026-11-07 McStas nightly deploy reported success in 7 seconds, but the site still served 2026-11-06 (https://github.com/mccode-dev/mcstas-nightly/actions/runs/42354978546).

deploy-pages uses GITHUB_SHA as the Pages deployment id, and a nightly run's GITHUB_SHA is the nightly repo's latest commit when it starts. A redeploy that changed no history made no commit, so the next night started from the same commit as an already-successful deployment. deploy-pages then read that old deployment's status and reported success without the new upload being published.

The history step now always commits (--allow-empty), so every run's successor starts from a new commit.

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Declaration of use of AI-tools

• Please add a checkmark here if you used AI-tools during the work for this contribution
• Claude Code traced the silent deploy through the run logs and the deploy-pages source, and made this change.

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Development OS / boundary conditions

Edited on macOS. No new dependencies. The workflow change has not run on GitHub yet.

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PR Checklist for contributing to McStas/McXtrace

• My contribution contains something else

  • Explanation is added in free form text above or below the checklist

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🤖 Generated with Claude Code