PR #11591 rewrote build.ts during the sandbox refactor, which recreated the file with default 644 permissions and dropped the executable bit (100755 -> 100644). The same change stripped the bit from build-node.ts and publish.ts.
The pre-release publish workflow invokes ./packages/opencode/script/build.ts directly, relying on its #!/usr/bin/env bun shebang. On Linux CI the non-executable mode fails with Permission denied before the build starts.
Restore mode 100755 on all three scripts. Content is unchanged.
marius-kilocode