Links for Powershell

Microsoft Team Foundation Server Client - Nuget package to integrate with TFS (version control, work item tracking, build, etc via REST APIs

Get Started with the REST APIs - shows the url format, usage, etc for TFS REST APIs.

TFS API Part 33 - Get Build Definitions and Build Details - example of how to get Build definition details.

Creating a Build Definition using the TFS 2013 API - actually in C#, but should work for Powershell also.

Pester - PowerShell testing. Support in VS2015 now.

NuGet Links

NuGet Package Restore - tells how to configure NuGet, TFS, etc to support different NuGet restore models.

Migrating MSBuild-Integrated solutions to use Automatic Package Restore

New-NuGetPackage Powershell script - create and publish NuGet packaes using a .nuspec or project file from Explorer or Powershell.

NuGet Package To Automatically Create Your NuGet Packages

TFS 2015 Build: NuGet restore from an internal repository