Morgan Tsvangarai has finally been sworn in as prime minister of Zimbabwe. The text of his speech is available here. This confirms the implementation of the power-sharing deal.
The deal required a constitutional amendment. The full text of the amendment is available here. At the risk of making this a ‘dog that did not bark’ post, the text confirms that, despite having a prime minister, Zimbabwe does not now have a semi-presidential constitution, as defined in this blog.
The text of the amendment confirms the analysis in a previous post. Neither the Cabinet nor the Council of Ministers is responsible to the legislature. So, constitutionally, Zimbabwe remains a presidential system.