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Build SilverMetal Enhanced - Windows ISO / build (pull_request) Successful in 4m54s
A prior aborted build left a DISM image mounted in the fixed WorkDir, locking install.wim and breaking the Stage 2 extract clean-up. Add a Stage 0 that discards any orphaned SilverMetal mounts + loaded hives before recreating the work dirs, and run CI in an ephemeral per-job RUNNER_TEMP WorkDir so concurrent/aborted runs can't collide. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>