- publish-platform.yml: Build job now checks BOTH oh-my-opencode and
oh-my-openagent before skipping. Build only skips when both are published.
Added 'Publish oh-my-openagent-{platform}' step that renames package.json
and publishes under the openagent name.
- publish.yml: Added 'Publish oh-my-openagent' step after opencode publish.
Rewrites package name and optionalDependencies to oh-my-openagent variants,
then publishes. Restores package.json after.
Previously, oh-my-openagent platform packages were never published because
the build skip check only looked at oh-my-opencode (which was already published),
causing the entire build to be skipped.
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