Nuget manager skill

docs/README.skills.md

@@ -23,5 +23,6 @@ Skills differ from other primitives by supporting bundled assets (scripts, code
 | Name | Description | Bundled Assets |
 | ---- | ----------- | -------------- |
 | [azure-role-selector](../skills/azure-role-selector/SKILL.md) | When user is asking for guidance for which role to assign to an identity given desired permissions, this agent helps them understand the role that will meet the requirements with least privilege access and how to apply that role. | `LICENSE.txt` |
+| [nuget-manager](../skills/nuget-manager/SKILL.md) | Manage NuGet packages in .NET projects/solutions. Use this skill when adding, removing, or updating NuGet package versions. It enforces using `dotnet` CLI for package management and provides strict procedures for direct file edits only when updating versions. | None |
 | [snowflake-semanticview](../skills/snowflake-semanticview/SKILL.md) | Create, alter, and validate Snowflake semantic views using Snowflake CLI (snow). Use when asked to build or troubleshoot semantic views/semantic layer definitions with CREATE/ALTER SEMANTIC VIEW, to validate semantic-view DDL against Snowflake via CLI, or to guide Snowflake CLI installation and connection setup. | None |
 | [webapp-testing](../skills/webapp-testing/SKILL.md) | Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs. | `test-helper.js` |

skills/nuget-manager/SKILL.md

@@ -0,0 +1,68 @@
+---
+name: nuget-manager
+description: 'Manage NuGet packages in .NET projects/solutions. Use this skill when adding, removing, or updating NuGet package versions. It enforces using `dotnet` CLI for package management and provides strict procedures for direct file edits only when updating versions.'
+---
+
+# NuGet Manager
+
+## Overview
+
+This skill ensures consistent and safe management of NuGet packages across .NET projects. It prioritizes using the `dotnet` CLI to maintain project integrity and enforces a strict verification and restoration workflow for version updates.
+
+## Prerequisites
+
+- .NET SDK installed (typically .NET 8.0 SDK or later, or a version compatible with the target solution).
+- `dotnet` CLI available on your `PATH`.
+- `jq` (JSON processor) OR PowerShell (for version verification using `dotnet package search`).
+
+## Core Rules
+
+1.  **NEVER** directly edit `.csproj`, `.props`, or `Directory.Packages.props` files to **add** or **remove** packages. Always use `dotnet add package` and `dotnet remove package` commands.
+2.  **DIRECT EDITING** is ONLY permitted for **changing versions** of existing packages.
+3.  **VERSION UPDATES** must follow the mandatory workflow:
+    - Verify the target version exists on NuGet.
+    - Determine if versions are managed per-project (`.csproj`) or centrally (`Directory.Packages.props`).
+    - Update the version string in the appropriate file.
+    - Immediately run `dotnet restore` to verify compatibility.
+
+## Workflows
+
+### Adding a Package
+Use `dotnet add [<PROJECT>] package <PACKAGE_NAME> [--version <VERSION>]`.
+Example: `dotnet add src/MyProject/MyProject.csproj package Newtonsoft.Json`
+
+### Removing a Package
+Use `dotnet remove [<PROJECT>] package <PACKAGE_NAME>`.
+Example: `dotnet remove src/MyProject/MyProject.csproj package Newtonsoft.Json`
+
+### Updating Package Versions
+When updating a version, follow these steps:
+
+1.  **Verify Version Existence**:
+    Check if the version exists using the `dotnet package search` command with exact match and JSON formatting. 
+    Using `jq`:
+    `dotnet package search <PACKAGE_NAME> --exact-match --format json | jq -e '.searchResult[].packages[] | select(.version == "<VERSION>")'`
+    Using PowerShell:
+    `(dotnet package search <PACKAGE_NAME> --exact-match --format json | ConvertFrom-Json).searchResult.packages | Where-Object { $_.version -eq "<VERSION>" }`
+
+2.  **Determine Version Management**:
+    - Search for `Directory.Packages.props` in the solution root. If present, versions should be managed there via `<PackageVersion Include="Package.Name" Version="1.2.3" />`.
+    - If absent, check individual `.csproj` files for `<PackageReference Include="Package.Name" Version="1.2.3" />`.
+
+3.  **Apply Changes**:
+    Modify the identified file with the new version string.
+
+4.  **Verify Stability**:
+    Run `dotnet restore` on the project or solution. If errors occur, revert the change and investigate.
+
+## Examples
+
+### User: "Add Serilog to the WebApi project"
+**Action**: Execute `dotnet add src/WebApi/WebApi.csproj package Serilog`.
+
+### User: "Update Newtonsoft.Json to 13.0.3 in the whole solution"
+**Action**:
+1. Verify 13.0.3 exists: `dotnet package search Newtonsoft.Json --exact-match --format json` (and parse output to confirm "13.0.3" is present).
+2. Find where it's defined (e.g., `Directory.Packages.props`).
+3. Edit the file to update the version.
+4. Run `dotnet restore`.