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Fix F# debugging issues (breakpoints, .pdb, sequence points). Build, run VS integration tests, inspect IL/PDB.
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Based on SOC occupation classification
| name | vsintegration-ide-debugging |
| description | Fix F# debugging issues (breakpoints, .pdb, sequence points). Build, run VS integration tests, inspect IL/PDB. |
.\Build.cmd -c Debug
xUnit2 VS Extensibility — not dotnet test.
$runner = (Get-ChildItem "$env:NUGET_PACKAGES\xunit.runner.console" -Recurse -Filter xunit.console.exe | Where-Object { $_.FullName -like '*net472*' } | Select-Object -First 1).FullName
& $runner artifacts\bin\FSharp.Editor.IntegrationTests\Debug\net472\FSharp.Editor.IntegrationTests.exe -parallel none -nologo
vsintegration/tests/FSharp.Editor.IntegrationTests/src/Compiler/CodeGen/IlxGen.fs → EmitDebugPoint, EnsureNopBetweenDebugPointssrc/Compiler/AbstractIL/ilwritepdb.fssrc/Compiler/Optimize/LowerComputedCollections.fsUseLocalCompiler.Directory.Build.propsVS debugger binds breakpoints only at stack-empty IL offsets. Move the sequence point — never add runtime instructions.
Triage a build / compile / restore / WarnAsError failure from its MSBuild binary log. Fetches the binlog (a local build's, or a failed dotnet/fsharp Azure DevOps PR build's published artifact) and analyzes it live via the `binlog-mcp` MCP server — structured errors, root-cause diagnosis, and an MSBuild perf X-ray. NOT for test failures or CheckCodeFormatting: a build binlog has no errors there.
Investigate compiler failures, test errors, or unexpected behavior through systematic minimal reproduction, 3-hypothesis testing, and verification. Always re-run builds and tests after changes.
Retrieve and analyze Azure DevOps build failures for GitHub PRs. Use when CI fails. CRITICAL: Collect ALL errors from ALL platforms FIRST, write hypotheses to file, then fix systematically.
Use when drafting, proposing, creating, or editing prose for a dotnet/fsharp GitHub PR or issue — body, title, comment, review summary, edits — including bare asks like "open a PR", "ship this", "write up what I did", "summarise the change", "reply on the PR", "edit the issue body", "gh pr create", "gh pr comment", "gh pr edit --body", "gh issue comment", "gh pr review --body". Primary use case is PR descriptions; same rules apply to PR/issue comments and review summaries. Not for labels, reviewers, merging, or code-review findings (just the prose write-up of them).
Always invoke after editing `.fs` files under `src/Compiler/`. Fast parse/typecheck without `dotnet build`, plus symbol references and inferred type hints. Use whenever the user asks about F# errors, compile errors, type inference, finding usages, or renaming a symbol in the compiler tree.
Performs multi-agent, multi-model code review of F# compiler PRs across 19 dimensions including type checking, IL emission, binary compatibility, and IDE performance. Dispatches parallel assessment agents per dimension, consolidates with cross-model agreement scoring, and filters false positives. Invoke when reviewing compiler changes, requesting expert feedback, or performing pre-merge quality checks.