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We introduced a new experimental feature back in PowerShell v7.4.0-preview.2+ called
PSFeedbackProvider. This blog outlines what this experimental feature is, how to use it and
describes different feedback providers we have already created.

Installing the PowerShell Preview and enabling Feedback Providers

You can install the latest 7.4 preview via our GitHub page here. If you are on Windows you can
download via the Microsoft store here.

Unless configured differently, the previews should have all experimental features enabled by deafult
but in case they are not enabled you can check and enable them by using the following commands:

Checking experimental features enabled:

Get-ExperimentalFeature

Enabling experimental feature:

Enable-ExperimentalFeature -Name PSFeedbackProvider

You will also have to enable the experimental feature PSCommandNotFoundSuggestion to get enable
the built in feedback provider.

Enable-ExperimentalFeature -Name PSCommandNotFoundSuggestion

Why have we created Feedback Providers

After we created PowerShell Predictive IntelliSense, we realized that no matter how hard we can try
to be “preventative” of errors, they will still occur. This made us think there was a better way to
give the users more feedback to their errors so they could recover quicker from them.

After prototyping and seeing how great it could work for errors, we got thinking that maybe we can
help inform and teach users better practices to the shell and thus we expanded feedback providers to
successful executions and comments.

What are Feedback Providers?

Feedback Providers are PowerShell modules that utilize the IFeedbackProvider interface to give
feedback and suggestions after the shell users have attempted to execute something. Feedback
providers can trigger upon three different interactive scenarios:

• Errors
• Success
• Comments

This means after the user has hit enter, Feedback Providers can trigger and know what scenario the
user has faced.

Built in Feedback Provider

We have created a built in feedback provider named General. This triggers on the CommandNotFound
exception error and gives the user suggestions on what command they may have meant to type from list
of commands already installed in the users $env:PATH. Both native commands and PowerShell cmdlets
will be suggested if they are installed.

You have may seen something similar to this before in previous versions of the
PSCommandNotFoundSuggestion experimental feature. We have given the UX an upgraded and turned this
into a feedback provider!

This is the old PSCommandNotFoundSuggestion experience:

This is the same feature but with the new feedback provider model:

Command-Not-Found Feedback Provider

We have created an additional feedback provider that we call the command-not-found feedback
provider. This utilizes the command-not-found utility tool that is defaulted on Ubuntu systems.
This feedback provider will trigger when the user has attempted to execute a command that is not
installed on the system but will give the user suggestions on how to install the command on their
system using apt. This is only compatible with Linux systems where the command-not-found utility
tool has been installed.

 

Another thing we did with this feedback provider is that we have it subscribed to the
ICommandPredictor interface so that it can give it suggestions directly to PowerShell Predictive
IntelliSense. This way as you start typing a suggestion, you can more quickly accept the suggestion.

We have open sourced this feedback provider so you can take a look at how we have implemented it
here. You can install this feedback provider from the PowerShell Gallery via this command:

Install-Module -Name command-not-found

Or if you are using the latest version of PSResourceGet, you can use this command:

Install-PSResource -Name command-not-found

You will need to import the module to enable the feedback provider:

Import-Module -Name command-not-found

We recommend you save this in your PowerShell $PROFILE so that it is always available to you.

What’s next with Feedback Providers?

We are still under rapid development with feedback providers so there may be changes to them in the
future! Due to the changes we are doing to the feedback provider, we will be publishing
documentation on how to create your own once we have finalized some design changes for creating the
providers.

In the meantime if you have any ideas on how we can make this experience best work for your
PowerShell workflow, please let us know in the issues tab of our PowerShell repo!

We are excited to be sharing more about feedback providers in the near future.

Thanks

Steven Bucher

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