[xperiandri]

Summary

Stacked on #58 and #54. The branch merges both, so besides the commits of #54 the commits that are new here are the merge and 5 others.

This pull request is the last link of the chain. It merges the AI agent files (#54) with the modernization branch (#58 and the pull requests before it), and updates what only makes sense when both are there: .github/copilot-instructions.md for the SDK-style projects, central package management, C# 14 and dotnet build, and .github/workflows/copilot-setup-steps.yml, which restores with dotnet restore. Those files come with #54, which is why these edits are not part of the pull requests they describe. The extension code and the projects do not change.

Chain, changes, things to know and verification

Chain

This pull request is part of a chain of small pull requests that all target main. After #53 the chain has two branches that do not depend on each other: the AI agent files (#54) and the modernization of the build (#55 to #58). The last pull request (#69) merges both and updates the instructions, which live in the files of the AI branch. The branch of each pull request contains the commits of the ones it is stacked on, so GitHub lists those commits here until they are merged. Merge in this order and review only the commits that are new in each pull request:

1. Switch the solution to the .slnx format #53 – Switch the solution to the .slnx format (first in the chain, no dependencies)
2. Add instructions, skills and MCP configuration for AI coding agents #54 – Add instructions, skills and MCP configuration for AI coding agents (stacked on Switch the solution to the .slnx format #53)
3. Convert the projects to the SDK style #55 – Convert the projects to the SDK style (stacked on Switch the solution to the .slnx format #53)
4. Move the package versions to central package management #56 – Move the package versions to central package management (stacked on Convert the projects to the SDK style #55)
5. Set the C# language version to 14 #57 – Set the C# language version to 14 (stacked on Move the package versions to central package management #56)
6. Build with dotnet build #58 – Build with dotnet build (stacked on Set the C# language version to 14 #57)
7. Update the instructions for the SDK-style projects, central package management, C# 14 and dotnet build #69 – Update the instructions for the SDK-style projects, central package management, C# 14 and dotnet build (stacked on Build with dotnet build #58 and Add instructions, skills and MCP configuration for AI coding agents #54) – this pull request

Changes

• The merge commit joins the two branches. The only conflict was the list of solution items in StringResourceVisualizer.slnx: the merged file lists the items of both branches.
• copilot-setup-steps.yml restores with dotnet restore and no longer sets up MSBuild (the same change that the dotnet build pull request makes in the build workflow).
• .github/copilot-instructions.md describes the SDK-style projects (a new .cs file needs no entry in the project, F5 needs Visual Studio 2026 18.5 or later), says where the package versions are, names the language version 14, and gives dotnet build as the build command with the MSBuild of Visual Studio as the alternative. These are the four instruction commits that were part of the pull requests before; the text did not change.

Things to know

• If you take only some of the pull requests, take this one last or skip it: with only the AI branch the instructions still describe the old projects, and with only the modernization branch there are no instructions to update.
• The result of the whole chain is the same tree as before the chain was split in two branches; nothing was added or removed.

Verification

• The tree of this branch is identical to the tree of the earlier tip of the chain that had every step in one line (git diff between them is empty), so the builds of that tip apply.
• CI: the workflows of this repository wait for the approval of a maintainer on a pull request from a fork, so the commit ran in a fork on a clean windows-2022 runner: Build builds the solution with dotnet build and runs the 4 tests, which pass. Copilot Setup Steps passes. As on the unchanged main (run), the step Publish Test Results fails there: the third-party action EnricoMi/publish-unit-test-result-action finds no Python interpreter on the image. This pull request neither causes nor changes it.
• Not verified: running the extension (F5, the Experimental instance).

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