# Aspire Upgrade

> Update the Aspire version in the repository to the latest nightly build.

- Skill: `communitytoolkit/aspire-upgrade` (Agent Skill)
- Install (CLI): `npx skillmds@latest add communitytoolkit/aspire-upgrade`
- Raw SKILL.md: https://api.skillmd.com/api/skills/communitytoolkit/aspire-upgrade/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: CommunityToolkit (https://skillmd.com/u/communitytoolkit)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/communitytoolkit/aspire-upgrade

---


# aspire-upgrade

The target version prefix is **13.4**.

# aspire-upgrade

You are responsible for updating the Aspire version in our repo to the latest nightly build.

You are to use the NuGet feed https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json

Look for the latest nightly version that starts with the target version prefix above. To do this, you will need to use the .NET CLI package search feature with the `--prerelease` and `--exact-match` flags (and probably best to specify the feed with `--source` to avoid confusion with any stable versions from nuget.org). Query for the `Aspire.AppHost.Sdk` package as it is a dependency of all our AppHost projects and will be the most reliable way to find the correct version string.

Here is an example command to find the latest version:

```bash
dotnet package search Aspire.AppHost.Sdk --prerelease --exact-match --source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json --format json
```

Parse the result for the latest version that matches the target version prefix. This will be the version you update to in the next steps.

## Step 1: Update `Directory.Build.props`

Update the following values in the root `Directory.Build.props` file:

```xml
<AspireMajorVersion>MAJOR_VERSION</AspireMajorVersion>
<AspireVersion>$(AspireMajorVersion).MINOR_VERSION.PATCH_VERSION-PREVIEW_VERSION</AspireVersion>
<AspirePreviewSuffix></AspirePreviewSuffix>
```

Where MAJOR_VERSION, MINOR_VERSION, PATCH_VERSION, and PREVIEW_VERSION are the respective parts of the version you found.

When using a nightly build, we want to blank out the `AspirePreviewSuffix` to avoid confusion with the actual preview versions.

## Step 2: Update all AppHost project files

Search the entire repository for **all** `.csproj` files whose `<Project Sdk="...">` attribute references `Aspire.AppHost.Sdk`. There are many of these across `tests/`, `tests-app-hosts/`, and `examples/`.

Each one must be updated to the full version string:

```xml
<Project Sdk="Aspire.AppHost.Sdk/MAJOR_VERSION.MINOR_VERSION.PATCH_VERSION-PREVIEW_VERSION">
```

**We cannot use a MSBuild variable in the Project SDK attribute, so you must hardcode the version in every file.**

Use a command like `grep -rl "Aspire.AppHost.Sdk" --include="*.csproj"` to find all files that need updating.

## Step 3: Update TypeScript AppHost `aspire.config.json` files

Search the entire repository for all `aspire.config.json` files (typically under `examples/` in directories ending with `.AppHost.TypeScript`). Each file has an `sdk.version` field that must be updated to the new version.

The `sdk.version` value should be the full version string (e.g., `13.4.0-preview.1.25280.1`).

Use a command like `find . -name "aspire.config.json"` to locate all files, then update the `"version"` value inside the `"sdk"` object in each one.

## Step 4: Validate the changes

Run `dotnet restore` at the repository root to verify the new version resolves correctly. Fix any errors before proceeding.

## Step 5: Create a pull request

After all changes are made and validated, create a pull request with the title "Update Aspire version to X.Y.Z" where X.Y.Z is the full version you updated to.