Create PowerKit: source-only NuGet package of shared utility extensions by Copilot · Pull Request #1 · Tyrrrz/PowerKit

Copilot · 2026-04-07T16:01:50Z

Expand InvalidFileNameChars to include ASCII control characters 0x01-0x1F
Add braces to foreach blocks
Rename char variable c to ch in PathExtensions.cs and StringExtensions.cs
Use pattern matching and arrow-bodied method in AggregateExceptionExtensions
Add braces to foreach body in AsyncEnumerableExtensions (SelectManyAsync)
Add GetInvalidFileNameChars and GetInvalidPathChars with crossPlatform parameter, update EscapeFileName
Add SubstringUntilLast and SubstringAfterLast to StringExtensions
Update PR body with summary of everything done
Initialize CrossPlatformInvalidPathChars from CrossPlatformInvalidFileNameChars to reduce duplication

Original prompt

Can you search through the following projects:

https://github.com/Tyrrrz/Contextual

https://github.com/Tyrrrz/MiniRazor

https://github.com/Tyrrrz/JsonExtensions

https://github.com/Tyrrrz/Ressy

https://github.com/Tyrrrz/Gress

https://github.com/Tyrrrz/DotnetRuntimeBootstrapper

https://github.com/Tyrrrz/GitHubActionsTestLogger

https://github.com/Tyrrrz/Onova

https://github.com/Tyrrrz/CliFx

https://github.com/Tyrrrz/LightBulb

https://github.com/Tyrrrz/YoutubeExplode

https://github.com/Tyrrrz/CliWrap

https://github.com/Tyrrrz/DiscordChatExporter

https://github.com/Tyrrrz/YoutubeDownloader

Look at what utilites/extensions these projects define (conventionally in the Utils dir/namespace).

Consolidate them into a single codebase to share between those projects.

To package it, create a source-only package similar to this one: https://github.com/Tyrrrz/PolyShim

Replicate PolyShim's approach, but adopt a simpler structure since we're not building a polyfill package. Copy the license file, gitignore, and other peripheral files.

Use the new slnx format for the solution file (run dotnet sln migrate to convert).

…utility extensions Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/43c1b0cc-139f-46f8-9717-63e43e341fc1 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Tyrrrz · 2026-04-07T16:23:48Z

@copilot remove the Utils namespace/dir and move everything one level up

Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/56664dc8-6a19-453c-9c1a-fa9b6aa2d4b8 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Copilot · 2026-04-07T16:25:55Z

@copilot remove the Utils namespace/dir and move everything one level up

Done in ad3489c. Utils/ directory removed — Disposable.cs is now directly under PowerKit/ (namespace PowerKit) and all extension files are under PowerKit/Extensions/ (namespace PowerKit.Extensions).

Copilot

Pull request overview

Introduces PowerKit, a source-only NuGet package that consolidates shared, BCL-only utility and extension helpers for reuse across Tyrrrz projects (PolyShim-style packaging).

Changes:

Adds a source-only packaging setup (PowerKit.csproj + build/PowerKit.props) that forces LangVersion=preview for consumers.
Implements a set of internal utility extensions (async enumerable helpers, string/stream/path helpers, etc.) plus a small Disposable helper.
Adds repo-level build/config scaffolding (solution, SDK pinning, NuGet config, license, gitignore, shared props).

Reviewed changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
PowerKit/PowerKit.props	MSBuild props for consumers (sets `LangVersion=preview`).
PowerKit/PowerKit.csproj	Source-only NuGet packing configuration (contentFiles + build props).
PowerKit/Disposable.cs	Disposable factory helpers (`Null`, `Create`, `Merge`).
PowerKit/Extensions/AsyncCollectionExtensions.cs	Async enumerable helpers (`TakeAsync`, `ToListAsync`, awaiter).
PowerKit/Extensions/CollectionExtensions.cs	Enumerable helpers (null filtering, singleton, nullable element access).
PowerKit/Extensions/ExceptionExtensions.cs	Exception traversal helpers.
PowerKit/Extensions/GenericExtensions.cs	Functional helpers (`Pipe`, `NullIf*`).
PowerKit/Extensions/PathExtensions.cs	Cross-platform filename escaping helper.
PowerKit/Extensions/StreamExtensions.cs	Stream copy helpers (auto-flush, progress reporting).
PowerKit/Extensions/StringExtensions.cs	String + StringBuilder helper extensions.
PowerKit/Extensions/TextReaderExtensions.cs	Async line enumeration for `TextReader`.
PowerKit/Extensions/TimeSpanExtensions.cs	`TimeSpan.Clamp`.
PowerKit.slnx	Solution file in slnx format.
NuGet.config	Defines NuGet.org as the only package source + default push source.
License.txt	MIT license file.
global.json	Pins .NET SDK version.
Directory.Build.props	Shared build/package metadata defaults.
.gitignore	Standard ignores for VS/IDE/build outputs.

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Tyrrrz

Also rename all extension classes to {ReceiverType}Extensions. Split classes that affect multiple types into separate files.

@copilot

Updated copyright year in the License file.

…tandard2.0, remove props Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/7af97092-2f8d-463c-8357-7b2ac9afa654 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Copilot · 2026-04-07T16:49:34Z

Also rename all extension classes to {ReceiverType}Extensions. Split classes that affect multiple types into separate files.

@copilot

Done in 8c4b9aa. All classes renamed to {ReceiverType}Extensions and multi-receiver classes split into separate files:

AsyncCollectionExtensions → AsyncEnumerableExtensions
CollectionExtensions → EnumerableExtensions + ObjectExtensions
ExceptionExtensions → ExceptionExtensions + AggregateExceptionExtensions
GenericExtensions → FunctionalExtensions
StringExtensions → StringExtensions + StringBuilderExtensions

…ait, CanSeek, fileName param Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/f217b614-b393-402a-857b-37113c1e00d1 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Tyrrrz · 2026-04-07T17:03:19Z

@copilot can you also add tests?

…ogress<T> Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/ecac02d7-08e2-43dc-b7ea-cf8e9ab88ccb Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

… methods Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/a4aa3bce-c192-4069-aaec-55a6553835d2 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

…yToAsync_Progress_Test) Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/f8dd53be-d7fe-4818-a11e-69427b83c252 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Copilot

Pull request overview

Copilot reviewed 33 out of 34 changed files in this pull request and generated 8 comments.

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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Tyrrrz · 2026-04-11T19:15:03Z

@copilot #1 (comment) please address this

…0x1F and add braces to foreach Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/a2731348-f326-4da6-af04-9d444f6f2efd Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/bb331d67-d827-44d6-825d-c79bf921f897 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Tyrrrz · 2026-04-12T09:53:58Z

@copilot update the PR body with the summary of everything done

Copilot

Pull request overview

Copilot reviewed 33 out of 34 changed files in this pull request and generated 3 comments.

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…ensions, braces in AsyncEnumerableExtensions, add SubstringUntilLast/SubstringAfterLast, refactor PathExtensions with GetInvalidFileNameChars/GetInvalidPathChars/crossPlatform param Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/f860d5c2-2b94-48ae-a785-334b01ce9d09 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/f860d5c2-2b94-48ae-a785-334b01ce9d09 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

…eChars to reduce duplication Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/56e3e0eb-b42d-49cc-a361-0b7b771dd982 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Initial plan

8ead2da

Copilot AI assigned Copilot and Tyrrrz Apr 7, 2026

Copilot started work on behalf of Tyrrrz April 7, 2026 16:01 View session

Tyrrrz added the enhancement New feature or request label Apr 7, 2026

Copilot AI changed the title ~~[WIP] Consolidate utilities and extensions into a shared codebase~~ Create PowerKit: source-only NuGet package of shared BCL-only utility extensions Apr 7, 2026

Copilot AI requested a review from Tyrrrz April 7, 2026 16:20

Copilot finished work on behalf of Tyrrrz April 7, 2026 16:20

Copilot started work on behalf of Tyrrrz April 7, 2026 16:23 View session

refactor: remove Utils namespace/dir, move files one level up

ad3489c

Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/56664dc8-6a19-453c-9c1a-fa9b6aa2d4b8 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Copilot finished work on behalf of Tyrrrz April 7, 2026 16:28

Tyrrrz marked this pull request as ready for review April 7, 2026 16:32

Copilot AI review requested due to automatic review settings April 7, 2026 16:32

Copilot started reviewing on behalf of Tyrrrz April 7, 2026 16:33 View session

Copilot AI reviewed Apr 7, 2026

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Tyrrrz reviewed Apr 7, 2026

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Copilot started work on behalf of Tyrrrz April 7, 2026 16:40 View session

Tyrrrz and others added 2 commits April 7, 2026 19:41

Change copyright year to 2026

e588616

Updated copyright year in the License file.

Copilot finished work on behalf of Tyrrrz April 7, 2026 16:52

Copilot AI requested a review from Tyrrrz April 7, 2026 16:52

Copilot started work on behalf of Tyrrrz April 7, 2026 16:53 View session

Copilot finished work on behalf of Tyrrrz April 7, 2026 17:02

Copilot started work on behalf of Tyrrrz April 7, 2026 17:03 View session

Tyrrrz reviewed Apr 11, 2026

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Comment thread PowerKit/Extensions/StreamExtensions.cs Outdated

Copilot AI and others added 2 commits April 11, 2026 18:38

Tyrrrz reviewed Apr 11, 2026

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Comment thread PowerKit.Tests/StreamExtensionsTests.cs Outdated

Copilot AI reviewed Apr 11, 2026

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Tyrrrz and others added 2 commits April 11, 2026 22:01

Update PowerKit/Extensions/StreamExtensions.cs

b095af1

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Update PowerKit/Extensions/AggregateExceptionExtensions.cs

b79b77c

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Copilot AI and others added 2 commits April 12, 2026 09:44

Rename char variable 'c' to 'ch' in PathExtensions and StringExtensions

0c1376c

Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/bb331d67-d827-44d6-825d-c79bf921f897 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Tyrrrz reviewed Apr 12, 2026

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Comment thread PowerKit/Extensions/AggregateExceptionExtensions.cs Outdated

Copilot AI reviewed Apr 12, 2026

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Comment thread PowerKit/Extensions/TextReaderExtensions.cs

Comment thread PowerKit/Extensions/AsyncEnumerableExtensions.cs Outdated

Comment thread PowerKit/Extensions/AsyncEnumerableExtensions.cs

Tyrrrz reviewed Apr 12, 2026

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Comment thread PowerKit/Extensions/PathExtensions.cs

Tyrrrz reviewed Apr 12, 2026

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Comment thread PowerKit/Extensions/StringExtensions.cs

Copilot AI and others added 6 commits April 12, 2026 10:07

Cache cross-platform invalid char arrays to avoid repeated allocations

afbe49a

Agent-Logs-Url: https://github.com/Tyrrrz/PowerKit/sessions/f860d5c2-2b94-48ae-a785-334b01ce9d09 Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Update PowerKit/Extensions/AsyncEnumerableExtensions.cs

3891af9

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Update PathExtensions.cs

381cb5f

Update PathExtensions.cs

d81f728

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Copilot AI commented Apr 7, 2026 •

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