Atlas empowers Blazor developers in 2026 to upgrade dependencies to new major versions and automatically fix all resulting compile and test failures by directly interacting with your `dotnet add package` commands, reading compiler output, and repairing code with precision across `.razor` components and C# files.
How to upgrade Blazor packages with Atlas?
Atlas streamlines Blazor dependency upgrades in 2026 by directly executing `dotnet add package` commands, capturing the full output, and saving it to a file if it exceeds 100 lines for your review, ensuring no detail is missed during the package bump.
When you need to bump a library to a new major version in your Blazor project, Atlas uses its `bash` tool to run the actual `NuGet` command: `dotnet add package <PackageName> --version <NewMajorVersion>`. This ensures that the upgrade process is identical to what you would perform manually, directly interacting with your `.csproj` file. Atlas captures the complete output from this operation, providing transparency into any immediate warnings or errors. If the output is extensive, Atlas saves it to a file, which you can then read using the `read` tool, keeping your terminal clean while providing access to all relevant information about the package manager's actions.
How Atlas understands Blazor breaking changes?
To accurately address breaking changes in Blazor, Atlas uses `webfetch` to retrieve the library's release notes, ensuring fixes align with the actual migration guide rather than relying on assumptions about 2026 API changes or common patterns.
Understanding the specific breaking changes introduced by a new major version is crucial for a successful Blazor dependency upgrade. Atlas leverages its `webfetch` tool to pull the official release notes or changelog directly from the library's documentation. This provides Atlas with the precise context needed to understand API removals, signature changes, or behavioral shifts that impact your Blazor application's `.razor` components and C# code. By having the actual breaking changes in context, Atlas can formulate a more accurate plan for repairs, avoiding guesswork and ensuring that the fixes it proposes are aligned with the library's intended migration path, rather than just reacting to compiler errors in isolation.
How Atlas fixes Blazor compile errors?
Atlas resolves Blazor compile errors by parsing the output from `dotnet build` and using the `edit` tool to apply precise code changes across `.razor` components and C# files, often leveraging `lsp`'s `goToDefinition` to inspect new API signatures in 2026.
After the dependency upgrade, Atlas runs `dotnet build` using its `bash` tool to enumerate all compile-time errors. Instead of guessing what broke, Atlas reads the real compiler output, which is the definitive source of truth for breakage in your Blazor project. For each error, Atlas employs its `edit` tool to modify the affected code. This includes changes within `.razor` components, C# code-behind files, and any related Blazor-specific logic like cascading parameters or `IJSRuntime` interop calls. To ensure accuracy, Atlas uses the `lsp` tool's `goToDefinition` operation. This allows Atlas to inspect the new signatures and types directly within the upgraded package, ensuring that the fixes it applies, such as adjusting method calls or property accessors, correctly align with the new API surface. This iterative process of building and fixing continues until the Blazor project compiles cleanly.
How Atlas ensures Blazor test suite passes?
After fixing compile errors, Atlas repeatedly runs `dotnet test (bUnit)` to validate the Blazor application's functionality, ensuring all 100% of your component tests pass before considering the upgrade complete and ready for review.
A successful dependency upgrade in Blazor isn't just about compiling; it's about maintaining functionality. Atlas uses its `bash` tool to execute your Blazor project's test suite with `dotnet test (bUnit)`. If any tests fail, Atlas analyzes the test output to identify the root cause, then uses its `edit` tool to apply further corrections to your `.razor` components or C# code. This cycle of fixing and re-running tests continues until all `bUnit` component tests pass, guaranteeing that the upgraded dependency hasn't introduced regressions. Finally, Atlas can run `dotnet format` to ensure that all modified Blazor code adheres to your project's formatting standards, maintaining code quality and consistency across the codebase.
How Atlas provides safety and review for Blazor upgrades?
Atlas prioritizes safety in Blazor dependency upgrades by drafting a plan in a read-only agent, requiring explicit approval before any changes, and presenting a unified diff for every file edit, ensuring you review 100% of modifications.
Safety and transparency are paramount when modifying a Blazor codebase. Atlas operates with a robust permission system: every tool call, including `bash` commands for `dotnet add package` or `dotnet test (bUnit)`, and `edit` operations on `.razor` or C# files, is permission-gated against allow, ask, and deny rules. Before making any changes, Atlas drafts a comprehensive plan in a read-only plan agent, which you must approve. Once approved, Atlas computes a unified diff for every file edit it proposes, surfacing these changes for your explicit approval before writing them to disk. This allows you to review every line of code Atlas intends to modify. Furthermore, Atlas reads git branches, status, and diffs, and can snapshot file changes as git patches, enabling easy rollback and ensuring that you have full control over the staging and committing of the upgraded Blazor codebase.
Step by step
- 01Initiate the Blazor dependency upgrade by asking Atlas to run `bash` with `dotnet add package <PackageName> --version <NewVersion>`.
- 02Approve Atlas's use of `webfetch` to retrieve the release notes for the upgraded package, providing context for breaking changes in your Blazor project.
- 03Allow Atlas to run `bash` with `dotnet build` to enumerate all compile-time errors in your Blazor solution, including those in `.razor` components.
- 04Review and approve Atlas's proposed fixes using the `edit` tool, which leverages `lsp` to inspect new API signatures in `.razor` and C# files.
- 05Grant permission for Atlas to execute `bash` with `dotnet test (bUnit)` to verify the Blazor application's functionality after fixes.
- 06Approve Atlas's final `dotnet format` run to ensure code style consistency across your Blazor codebase.
- 07Review the complete unified diff of all changes before Atlas stages and commits them to your Blazor repository, ensuring full transparency.
Frequently asked questions
- Can Atlas upgrade Blazor dependencies across major versions?
- Yes, Atlas is designed to handle major version upgrades for Blazor dependencies. It uses `dotnet add package` to perform the upgrade and then systematically fixes all resulting compile and test failures across your `.razor` components and C# files.
- How does Atlas handle breaking changes in Blazor components?
- Atlas addresses breaking changes in Blazor components by first fetching the library's release notes with `webfetch`. It then uses `dotnet build` to identify errors and the `edit` tool with `lsp` to inspect new API signatures, applying targeted fixes to `.razor` and C# code.
- Does Atlas support `bUnit` tests for Blazor upgrades?
- Absolutely. Atlas integrates directly with your Blazor test suite by running `dotnet test (bUnit)`. It iteratively fixes code and re-runs tests until all `bUnit` component tests pass, ensuring functional correctness after the dependency upgrade.
- What Blazor files does Atlas modify during an upgrade?
- Atlas can modify any relevant Blazor files, including `.razor` components, C# code-behind files, `.csproj` files for package references, and any other C# source files impacted by the dependency upgrade. All changes are presented as a unified diff for your approval.
- How does Atlas ensure code quality after a Blazor dependency bump?
- After fixing compile and test failures, Atlas can run `dotnet format` to ensure that all modified Blazor code adheres to your project's formatting standards. This maintains consistency and code quality throughout the upgrade process.
- Is it safe to let Atlas modify my Blazor codebase?
- Yes, Atlas prioritizes safety. It operates with permission-gated tool calls, drafts plans in a read-only agent, and presents a unified diff for every proposed change. You must explicitly approve all modifications before they are written to your Blazor project, and git integration allows for easy rollbacks.
- Can Atlas fix Blazor `IJSRuntime` interop issues after an upgrade?
- Yes, if an upgraded dependency introduces breaking changes that affect `IJSRuntime` interop calls in your Blazor application, Atlas can identify these issues through `dotnet build` output and use its `edit` tool to apply the necessary corrections to your C# or JavaScript interop code.
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