The release workflow reads the pinned @opencode-ai/sdk version with bash command-substitution syntax before caching the bundled OpenCode CLI artifact. On Windows jobs GitHub Actions defaults run steps to PowerShell, which treated VERSION= as a command and failed before the cache/build steps ran.
Set shell: bash on the release workflow version-discovery steps so macOS and Windows use the same syntax. The smoke workflow already used bash for the Windows version step, which is why the smoke artifact could pass while the production Windows release job failed.
Bohdan Triapitsyn
01e0905e8b