GitHub's ubuntu-latest move to 26.04 is rolling out unevenly; re-run checks instead of assuming

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GitHub's migration window for ubuntu-latest runs from October 19 to November 19, 2026, shifting the image from Ubuntu 24.04 to 26.04 in stages rather than all at once. A developer's static scans of three repositories on October 20 and 21 showed no changes, but the scanner reads workflow files only and cannot detect when a given repository's image switches. Workflows that have not run since October 19 have not yet been tested against the new image, and the two images differ in 22 toolset entries, so earlier green results may not hold. Separately, the macos-14 runner image retires on November 2, 2026, and any workflow still referencing it will fail completely on that date.

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ProgrammingDEV Community ·

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