* test(#4738): opencode manifest must record its staged skills (failing first)
* fix(#4738): record opencode's staged skills in the install manifest
* test(#4738): use the centralized temp-dir helper in the manifest tests
* fix(#4738): retire the dead hostBehaviors vocabulary entry, tighten detector asserts, temper changeset
* chore(#4738): backfill changeset PR number (4847)
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Co-authored-by: sim <sim@local>
11b3091df0