Commit Graph

47 Commits

Author SHA1 Message Date
Abhitej John f2e4eeaca8 Add csharp-refactoring and dotnet-breaking-changes dotnet skills
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
2026-07-07 13:56:36 -07:00
Wendy Breiding 4975793af0 Moving niche skills to dotnet-advanced (#807)
* Add csharp-development skill and update CODEOWNERS and README.md

- Introduced a new skill for C# development guidance.
- Updated CODEOWNERS to include reviewers for the new skill.
- Modified README.md to list the new csharp-development skill.
- Added evaluation scenarios for the csharp-development skill.

* Refactor C# evaluation scenarios to enhance production code review and validation guidance

* Refactor production code review scenarios to improve clarity and focus on async error handling

* Update CODEOWNERS to reflect current ownership and streamline reviewer assignments

* Remove csharp-development skill documentation and evaluation tests

* Remove csharp-development skill from README

* Fix formatting in Constants.g.cs by adding missing semicolon

* Revert Constants.g.cs to main

* Remove csharp-development skill from CODEOWNERS

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Update CODEOWNERS to include additional reviewers for dotnet-ai skills

* Move dotnet skills to dotnet-util to keep dotnet plugin focused and targeted.

* Add CODEOWNERS, SKILL.md, package-types.md, and publish-workflow.md for NuGet trusted publishing; implement eval.yaml for dotnet-pinvoke and dotnet-util skills

* Potential fix for pull request finding

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* Potential fix for pull request finding

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* Update README files to enhance plugin descriptions and remove outdated LSP section

* Rename repository title from 'dotnet' to 'dotnet-util' in README.md for clarity.

* Refine README.md to clarify included .NET skills and remove redundant descriptions

* Add 'dotnet-util' plugin for utility skills in .NET development

* Potential fix for pull request finding

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* Add 'dotnet-util' plugin for utility skills in .NET development

* Add dotnet-util to Codex marketplace manifest

* Align dotnet-util marketplace descriptions

* Refactor CODEOWNERS and update README for nuget-trusted-publishing; add evaluation scenarios and workflow template for trusted publishing

* Add P/Invoke diagnostics and type mapping references; implement NuGet trusted publishing setup

- Created diagnostics.md for common pitfalls and failure modes in P/Invoke.
- Added type-mapping.md for native-to-.NET type mappings.
- Introduced nuget-trusted-publishing skill for setting up OIDC-based NuGet publishing.
- Added package-types.md detailing structural requirements for various NuGet package types.
- Created publish-workflow.md as a template for GitHub Actions workflows for NuGet publishing.

* Add evaluation YAML files for csharp-scripts, dotnet-pinvoke, and nuget-trusted-publishing skills

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Complete nuget-trusted-publishing move: remove from dotnet, add to dotnet-specialized README

* Potential fix for pull request finding

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* Potential fix for pull request finding

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* Remove eval.vally.yaml and eval.yaml files for nuget-trusted-publishing skill

* Potential fix for pull request finding

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* Potential fix for pull request finding

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* Potential fix for pull request finding

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* Add NuGet trusted publishing skill and related references

- Introduced `nuget-trusted-publishing` skill for setting up OIDC-based trusted publishing on GitHub Actions.
- Added detailed documentation in SKILL.md covering prerequisites, process, safety rules, and troubleshooting.
- Created `package-types.md` to outline structural requirements for various NuGet package types.
- Developed `publish-workflow.md` as a template for GitHub Actions workflows for NuGet publishing.
- Removed obsolete `dotnet-specialized` plugin and updated `dotnet` plugin description.
- Added evaluation tests for `nuget-trusted-publishing` skill to ensure proper guidance for users.
- Implemented evaluation tests for `dotnet-pinvoke` and `csharp-scripts` skills to validate functionality.

* Update dotnet plugin description to include high-level .NET development skills

* Add NuGet trusted publishing and P/Invoke documentation

- Introduced type mapping reference for native-to-.NET types in dotnet-pinvoke.
- Added a comprehensive guide for setting up NuGet trusted publishing using OIDC in GitHub Actions.
- Created a reference document detailing structural requirements for various NuGet package types.
- Provided a template for GitHub Actions workflow for publishing NuGet packages with trusted publishing.
- Implemented evaluation scenarios for testing the dotnet-pinvoke and nuget-trusted-publishing skills, including prompts and assertions for expected outputs.

* Potential fix for pull request finding

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* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Potential fix for pull request finding

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* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Add CODEOWNERS entries for setup-local-sdk

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Update dotnet README to list setup-local-sdk skill

* Add setup-local-sdk to skills section in README

* Potential fix for pull request finding

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* Potential fix for pull request finding

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---------

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
2026-06-29 22:25:44 +00:00
Gerald Versluis 72c0d2c7b7 Add setup-local-sdk skill for global.json paths feature (#508)
* Rebase setup-local-sdk skill

Replay PR #508 onto current main and address the remaining setup-local-sdk review feedback. The install examples now use fail-fast temporary downloads, the team scripts preserve existing global.json content, and eval assertions cover the critical paths/version/workload behavior.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address setup-local-sdk review comments

Add the missing skill license metadata and fix the PowerShell .gitignore regex examples so they correctly detect an existing .dotnet/ entry.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Stabilize setup-local-sdk evals

Reduce overfit-prone assertions, make incompatible host handling explicit, configure base SDK resolution before slow workload installs, and tighten exact-version/team-script validation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address setup-local-sdk follow-up review

Include the shared dotnet skill reviewer team in CODEOWNERS, make .gitignore appends newline-safe, and tighten the incompatible-host eval to reward stopping before local install commands.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Tighten exact local SDK eval

Measure project-level SDK resolution and exact roll-forward behavior using global.json artifact assertions so the scenario distinguishes PATH-based local installs from SDK paths setup.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address install script review feedback

Use the documented lowercase dotnet-install quality value and call out both bash and PowerShell official install script URLs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Increase team script eval timeout

Give the team install script scenario the same realistic long-running timeout as other scenarios that install preview SDK bits.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add Windows local SDK check

Document the PowerShell equivalent for detecting an existing local SDK and give exact SDK installs enough time to complete in eval.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Stabilize team script eval

Focus the team script scenario on script/config generation, create reproducible setup guidance before long downloads, and avoid brittle transcript assertions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Make mktemp usage portable

Use BSD/macOS-compatible mktemp templates in setup-local-sdk bash snippets and generated team install script.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-06-24 10:05:32 -07:00
Amaury Levé 35ace775b3 Add dotnet-test-migration plugin and move migration skills there (#808)
Move the .NET test framework/platform migration skills (migrate-mstest-v1v2-to-v3, migrate-mstest-v3-to-v4, migrate-vstest-to-mtp, migrate-xunit-to-mstest, migrate-xunit-to-xunit-v3) and the test-migration orchestrator agent out of dotnet-test into a new dedicated dotnet-test-migration plugin, along with their evals. Update all marketplace manifests, READMEs, CODEOWNERS, and .vally.yaml accordingly.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-06-23 17:19:32 +02:00
Wendy Breiding a7a744ce18 Make owner adjustments (#790)
* Add csharp-development skill and update CODEOWNERS and README.md

- Introduced a new skill for C# development guidance.
- Updated CODEOWNERS to include reviewers for the new skill.
- Modified README.md to list the new csharp-development skill.
- Added evaluation scenarios for the csharp-development skill.

* Refactor C# evaluation scenarios to enhance production code review and validation guidance

* Refactor production code review scenarios to improve clarity and focus on async error handling

* Update CODEOWNERS to reflect current ownership and streamline reviewer assignments

* Remove csharp-development skill documentation and evaluation tests

* Remove csharp-development skill from README

* Fix formatting in Constants.g.cs by adding missing semicolon

* Revert Constants.g.cs to main

* Remove csharp-development skill from CODEOWNERS

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Update CODEOWNERS to include additional reviewers for dotnet-ai skills

---------

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2026-06-18 10:51:09 -07:00
Copilot 2d163bb600 Rename ASP.NET Core plugin from dotnet-aspnet to dotnet-aspnetcore (#711)
* Initial plan

* Rename dotnet-aspnet plugin to dotnet-aspnetcore

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
2026-06-08 09:20:31 -07:00
Javier Calvarro Nelson 198e58c983 Add blazor skills to dotnet-blazor plugin (#357)
* Add dotnet-blazor plugin and convert-blazor-server-to-webapp skill

Add the dotnet-blazor plugin with 9 skills covering Blazor Web App development:
- plan-ui-change: Plan and scaffold UI features in Blazor Web Apps
- create-blazor-project: Create new Blazor projects with proper render mode setup
- author-component: Author Razor components with parameters, events, lifecycle
- coordinate-components: Share state across components using CascadingValueSource/scoped services
- use-js-interop: Call JavaScript from Blazor and vice versa
- fetch-and-send-data: HTTP data access with proper service patterns
- configure-auth: Set up ASP.NET Core Identity and authorization in Blazor
- collect-user-input: Build forms with EditForm, validation, and file uploads
- support-prerendering: Handle prerendering lifecycle and state persistence

Add convert-blazor-server-to-webapp skill to the dotnet-aspnet plugin for
migrating .NET 7 Blazor Server apps to .NET 8+ Blazor Web App architecture.

All 10 skills pass evaluation with quality improvements ranging from 12-50%
and overfitting scores within acceptable thresholds.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update eng/allowed-external-deps.txt

* Update .gitignore

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-05-25 16:25:27 +00:00
Amaury Levé 9f531203ec Promote 4 experimental test skills to dotnet-test plugin (#634)
Move assertion-quality, test-gap-analysis, test-smell-detection, and
test-tagging from dotnet-experimental to dotnet-test. These skills have
demonstrated sufficient eval coverage, unique value beyond baseline model
capabilities, and are already integrated into the test-quality-auditor
agent pipeline.

Changes:
- Move skills and tests, dropping the exp- prefix
- Update all cross-references in skill descriptions and routing tables
- Update test-quality-auditor agent and eval scenarios
- Update CODEOWNERS for the moved paths
- Delete duplicate exp-dotnet-test-frameworks (identical to dotnet-test-frameworks)
- Fix stale exp-dotnet-test-frameworks reference in exp-test-maintainability

Skills held back for further iteration:
- exp-mock-usage-analysis: baseline model scores 5/5 on key scenarios
- exp-test-maintainability: quality gains offset by token overhead
2026-05-11 14:46:11 +02:00
Jan Jones 3aefa0f10a Update file-based app skill to mention features from 10.0.300 (#602)
Co-authored-by: Copilot <copilot@github.com>
2026-05-11 09:53:18 +02:00
Manish Jayaswal 2633d3d482 add a new dotnet11 plugin and a new system text json skill to it. (#535)
* add a new dotnet11 plugin and a new system text json skill to it.

* Update plugins/dotnet11/skills/system-text-json-net11/SKILL.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* added the option to run dotnet11 skills. by default they don't get included

* Update tests/dotnet11/system-text-json-net11/eval.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add JSON output assertions to system-text-json-net11 eval.yaml

Agent-Logs-Url: https://github.com/dotnet/skills/sessions/8e302f3f-4328-44a0-845d-4eb0c930af63

Co-authored-by: ManishJayaswal <9527491+ManishJayaswal@users.noreply.github.com>

* addressed CR comments

* addressed more CR comments

* fixed agument to pass while enabling dotnet11 skills

* Remove dotnet11-specific filtering from skill-validator and evaluation workflow

Now that .NET 11 is the default SDK for the repo (global.json updated on main),
there is no need for special dotnet11 exclusion logic. The dotnet11 plugin skills
are treated like any other plugin and included in all evaluation runs.

Changes:
- Remove --include-dotnet11 CLI option and filtering logic from EvaluateCommand.cs
- Remove IncludeDotnet11 from ValidatorConfig model
- Remove --dotnet11 flag parsing from evaluation workflow gate job
- Remove dotnet11 exclusion logic from discover job
- Remove conditional .NET 11 preview SDK install step (global.json handles it)
- Remove dotnet11 from excludeFromSchedule list
- Remove all dotnet11-specific warning/status messages
- Remove section 9 from InvestigatingResults.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* address code review comments after rebase

* added the plugin to cursor and added MIT license to skill

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: [Manish Jayaswal] <[manishj@microsoft.com]>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: ManishJayaswal <9527491+ManishJayaswal@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-05-04 12:08:25 -07:00
Viktor Hofer a5e20a1fef Remove agentic workflows (#579)
* Remove agentic workflows

The agentic workflows were useful when CCA didn't support loading skills. That's now solved and supported. The agentic workflows come with a couple of issues (limited chars) which make it hard to use. Remove them in favor of the plugin system.

* Remove Agentic Workflows section from README

Removed section about Agentic Workflows from README.

* Remove stale /agentic-workflows references from CONTRIBUTING.md, CODEOWNERS, and docs

Agent-Logs-Url: https://github.com/dotnet/skills/sessions/8f129e2f-156e-4ee9-9897-896cd1981513

Co-authored-by: ViktorHofer <7412651+ViktorHofer@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
2026-04-23 08:13:12 +00:00
Devin Breshears 08ff14b009 Add Reviewer Teams (#323)
* Add Reviewer Teams

* Add the org

* Keep original msbuild owners alongside reviewer team

Agent-Logs-Url: https://github.com/dotnet/skills/sessions/0f052a87-406b-4ec3-aa67-57c2d11c64b4

Co-authored-by: danmoseley <6385855+danmoseley@users.noreply.github.com>

* Update .github/CODEOWNERS

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Viktor Hofer <viktor.hofer@microsoft.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: danmoseley <6385855+danmoseley@users.noreply.github.com>
Co-authored-by: Dan Moseley <danmose@microsoft.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
2026-04-11 05:27:19 +00:00
Milos Kotlar 038dd4f087 Add Apple crash symbolication skill (#201)
* Add SKILL.md for iOS crash symbolication process

Co-authored-by: Steve Pfister <steveisok@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update plugins/dotnet/skills/ios-crash-symbolication/SKILL.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add automation script, tests, and review fixes for ios-crash-symbolication

- Add Symbolicate-Crash.ps1 (664 lines): parses .ips JSON, searches
  local dSYMs (SDK packs, NuGet cache, user paths), verifies UUIDs via
  dwarfdump, batch-symbolicates with atos, identifies runtime version
- Update SKILL.md: add Automation Script and Runtime Version
  Identification sections, fix atos -o to point inside dSYM bundle,
  add dwarfdump and MAUI to frontmatter, wrap steps in Workflow
  heading for consistency with Android sibling, fix misleading
  'rebuild' guidance per review feedback (Rolf)
- Add eval.yaml with 7 test scenarios: Mono crash, CoreCLR crash,
  no .NET frames, NativeAOT, multi-library UUIDs, ASI field
  priority, and Android tombstone rejection
- Add 5 .ips test fixture files (two-part JSON format)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add iOS crash log and evaluation scenarios for symbolication tests

* Remove unused file

* Add CODEOWNERS entry for iOS crash symbolication

* Rename ios-crash-symbolication to apple-crash-symbolication

Address PR feedback to support all Apple platforms (tvOS, Mac Catalyst,
macOS) not just iOS:

- Add $appleRids array covering ios, tvos, maccatalyst, and osx RIDs
- Refactor Find-Dsym and Find-RuntimeVersion to search all platform packs
- Rewrite SKILL.md for orchestration focus and reduced token budget
- Extract domain knowledge to references/ips-crash-format.md
- Tune eval.yaml: outcome-based rubrics, broad assertions, overfit 0.26

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix script robustness: base address parsing and null-safe property access

- Simplify base address cast to [uint64] without manual hex prefix stripping
- Use PSObject.Properties check before accessing lastExceptionBacktrace

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add dSYM-path rubric items to CoreCLR and ASI scenarios

Add rubric items testing for skill-specific domain knowledge (SDK pack
paths, NuGet cache directories) that baseline agents cannot provide.
This creates the quality delta needed to pass the 10% improvement
threshold while keeping overfit at 0.12 (Low).

3-run validation: 30.1% improvement, 5/7 scenarios positive.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refactor code structure for improved readability and maintainability

* Fix crash symbolication script for real .ips format and improve eval scenarios

- Fix Symbolicate-Crash.ps1 strict-mode bugs with real .ips crash logs:
  safe property access for image name/path (sentinel entries), thread name
  (most threads unnamed), and single-element array unwrapping (.Count)
- Add SKILL.md efficiency guidance: resolve script path from skill directory
  (no find /), start with -ParseOnly, don't run broad filesystem searches
- Reframe eval scenarios for platform-independent evaluation (parse/analyze
  instead of requiring macOS-only atos/dwarfdump), tighten rubric to test
  skill-specific knowledge (NuGet package name, all .NET binary images)

Validation results (3 runs, claude-opus-4.6):
  Scenario 1 (parse frames):       3.3 → 4.0 (+0.7) ✅
  Scenario 2 (investigate crash):   3.3 → 4.0 (+0.7) ✅
  Scenario 3 (reject Android):      3.3 → 4.0 (+0.7) ✅

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Auto-fallback to parse-only output when atos is unavailable

On Linux (CI), atos and xcrun don't exist. Previously the script would
error out after completing all parsing, losing the results. Now it
detects the missing tool and falls back to ParseOnly output automatically,
ensuring the agent always gets structured parse data regardless of platform.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move apple-crash-symbolication to dotnet-diag plugin

Relocate skill from plugins/dotnet to plugins/dotnet-diag and tests
from tests/dotnet to tests/dotnet-diag. Update CODEOWNERS accordingly.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve apple-crash-symbolication: macOS symbols, bug fixes, training log

- Fix JSON case-conflict parsing (vmRegionInfo/vmregioninfo duplicate keys)
- Fix strict-mode safe access for optional asi field
- Expand Step 4 with macOS-specific symbol package guidance (.symbols NuGet)
- Add .dwarf to .dSYM conversion instructions
- Add src/coreclr/ to validation paths
- Soften stop signals to allow crash analysis and deeper investigation
- Add macOS Symbol Packages and JSON Parsing Gotchas to reference doc
- Create training log documenting session findings
- Add .github/skills/ project-local copy for CLI testing

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* apple-crash-symbolication: automated version extraction and symbol acquisition

Script improvements:
- Preserve full image paths from crash log (previously discarded by GetFileName)
- Add Get-RuntimeVersionFromPath: extracts .NET version from image paths
  (e.g., .../shared/Microsoft.NETCore.App/10.0.4/libcoreclr.dylib)
- Add Get-RidFromPath: infers RID from path or crash metadata (OS/CPU)
- Path-based version detection as fast primary method, UUID matching as fallback
- Emit copy-pasteable symbol acquisition commands when dSYMs are missing
- Show .NET version in ParseOnly library listing

SKILL.md updates:
- Step 2: document automated version detection and acquisition commands
- Step 4: script now prints ready-to-run download/conversion commands

Training log: record session 2 findings (5 issues, script + SKILL.md changes)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* apple-crash-symbolication: add symbol server anti-pattern

dotnet-symbol and msdl.microsoft.com do not serve macOS dSYM/DWARF
symbols — only Windows PDBs and Linux ELF debug info. NuGet packages
are the only public source. Added anti-pattern to SKILL.md (both
copies) and reference doc to prevent wasted tool calls.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* apple-crash-symbolication: fix symbol server guidance — dotnet-symbol works for macOS

dotnet-symbol --symbols <binary> successfully downloads .dwarf debug
symbols for macOS Mach-O binaries from msdl.microsoft.com. Previous
commit incorrectly claimed this didn't work. Replaced anti-pattern
with positive guidance in SKILL.md (both copies) and reference doc.
Added training log entry documenting the correction.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Promote dotnet-symbol as preferred macOS symbol acquisition method

- Script: macOS acquisition block now shows Option A (dotnet-symbol,
  preferred) and Option B (.symbols NuGet, fallback). Fixed .dwarf
  filename doubling bug in cp command.
- SKILL.md (both copies): Step 2 updated for dotnet-symbol preference,
  Step 4 reordered with dotnet-symbol as #2 and NuGet symbols as #3.
- Reference doc: Restructured macOS Symbol Packages section with
  Preferred/Fallback subsections and shared .dwarf→.dSYM conversion.
- Training log: Session 4 entry documenting the promotion.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add automated symbol server download for macOS crash symbolication

- Add Get-DebugSymbols function: downloads .dwarf files from Microsoft
  symbol server using Mach-O UUID (mirrors android tombstone approach)
- Add Convert-DwarfToDsym function: creates .dSYM bundle from .dwarf
  with UUID verification via dwarfdump
- New params: -SymbolCacheDir, -SymbolServerUrl, -SkipSymbolDownload
- Wire download+conversion into main flow after local dSYM search
- Refactor manual acquisition guidance as fallback-only
- Update both SKILL.md copies: frontmatter, Step 4, new flags
- Update ips-crash-format.md: automated download as primary method
- Add training log session 5

URL pattern: https://msdl.microsoft.com/download/symbols/_.dwarf/mach-uuid-sym-{UUID}/_.dwarf
Verified end-to-end: 391/391 .NET frames symbolicated with clean cache.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* apple-crash-symbolication: add triage order guidance to Step 3

Step 3 now instructs the agent to explain the faulting mechanism
(frames #0-#1) before examining cross-thread context. This addresses
a misdiagnosis where GC activity on neighboring threads was mistaken
for causation when the actual root cause (_sigtramp -> NULL signal
handler) was visible in the crashing thread's first two frames.

Training log updated with session retrospective and corrected the
original crash description from GC race to NULL signal handler.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove stale .github/skills/apple-crash-symbolication remnant

Skill lives in plugins/dotnet-diag/skills/apple-crash-symbolication/ since
the plugin restructuring. The old .github/skills/ copy was a leftover.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add libimobiledevice.org to known-domains.txt

The reference scanner CI check fails because the apple-crash-symbolication
skill references https://libimobiledevice.org/ which is not in the allowed
domains list. This domain hosts the libimobiledevice project, a community
library for communicating with iOS devices.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Delete eng/reference-scanner/known-domains.txt

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add libimobiledevice.org to known-domains allowlist

The apple-crash-symbolication SKILL.md references libimobiledevice.org
for the idevicecrashreport tool. Add the domain to the known-domains
file to fix the skill-check CI reference validation failure.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Restructure apple-crash-symbolication for analysis-first approach

The skill was getting ❌ verdicts on all eval scenarios because it
directed the LLM to 'run the script' instead of teaching crash analysis
domain knowledge. This mirrors the problem where quality decreased from
3.0 to 2.7 in the parse scenario.

Restructure to follow the Android sibling's proven pattern:
- Lead with parsing (.ips two-part JSON format, key fields)
- Teach .NET library identification (inline library table)
- Teach crash interpretation (asi, faulting thread, exception)
- Teach atos command construction (concrete examples)
- Teach dSYM search paths (ordered list with commands)
- Move automation script to optional section at the end
- Move crash log retrieval to a separate section (not Step 1)

Trim the reference doc to avoid duplication, keeping only macOS
symbol distribution differences and supported RID list.

Token budget: ~2,100 tokens (within 800-2,500 optimal range).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refine prompts and assertions in eval.yaml for iOS crash symbolication scenarios

* Add format verification guard and fix overfitting in reject scenario

- SKILL.md: Add explicit format check at start of Step 1 to verify
  .ips JSON before proceeding; add 'Wrong file format' stop signal
- eval.yaml: Remove direct skill reference from scenario 3 prompt
  to reduce overfitting (was triggering skill activation in plugin mode)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix scenario 3: provide actual Android tombstone file for rejection test

- eval.yaml: Replace invalid 'extra_files' with correct 'files' syntax
  (extra_files was silently ignored, so crash_android.txt was never copied)
- eval.yaml: Remove copy_test_files for scenario 3 to avoid copying
  ios_crash.ips which tempts the agent in plugin mode
- Add tombstone_sample.txt to test directory (copy from android sibling)
- SKILL.md: Mention ndk-stack/addr2line in wrong-format stop signal

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update tests/dotnet-diag/apple-crash-symbolication/tombstone_sample.txt

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update eng/known-domains.txt

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Address review feedback: simulator RIDs, perf, safety, accuracy fixes

- Add simulator RIDs (iossimulator, tvossimulator) to script search list
- Build hashtable for O(1) image lookups in Get-ThreadFrames
- Remove -UseBasicParsing (unnecessary in pwsh 7+)
- Include UUID in Convert-DwarfToDsym cache path; sanitize library name
- Make version regex greedy to capture pre-release suffixes
- Improve format detection error message for non-.ips files
- Guard xcrun fallback with Get-Command check
- Add .dwarf-to-.dSYM conversion guidance for macOS manual fallback
- Escape .ips in eval.yaml regex assertion
- Fix UUID note in reference doc (normalize, not assume lowercase)
- Fix symbol server example to use crash-log image name

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address Copilot review round 2: case-sensitive replace, dedup, path fix, redact PII

- Use -creplace with guard for vmregioninfo duplicate key handling
- Use Sort-Object -Unique for proper library deduplication
- Fix macOS fallback to create .dSYM bundles under symbols-out/
- Redact device identifiers in test fixture .ips file

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Prevent dSYM cache poisoning: validate UUID on cache hit, remove on mismatch

- Convert-DwarfToDsym now verifies cached dSYM UUID before reusing
- On UUID mismatch during download, remove the bad cached bundle so
  subsequent runs can retry cleanly

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix cache validation: normalize UUID comparison, clean up dwarf + bundle on mismatch

- Use Format-Uuid to normalize dwarfdump output before comparing to
  already-normalized \ in Convert-DwarfToDsym cache check
- On UUID mismatch after download, remove the entire .dSYM bundle
  directory and the cached .dwarf file to prevent repeat failures

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix Resolve-Frames null handling: use List[object] to preserve null entries

PowerShell array += \ silently drops the element, breaking
index alignment between results and input addresses. Switch to
List[object].Add() which correctly preserves null entries.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix dSYM bundle root traversal, qualify version-from-path note

- Walk up directory tree until *.dSYM is found instead of going up
  only 2 levels (which lands at Contents/Resources, not the bundle)
- SKILL.md: note that version-in-path only works on macOS shared
  framework installs; iOS paths don't embed the runtime version

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove incorrect .github/skills path reference from training log

The .github/skills/ directory doesn't exist in this repo. The file
was already listed under its actual plugins/dotnet-diag/ path.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Detect simulator for RID inference in manual fallback guidance

Detect CoreSimulator in image paths to use iossimulator-/tvossimulator-
RIDs for simulator crashes, avoiding UUID mismatches from wrong runtime
packs. Also handle arm64e CPU type.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix Resolve-Frames return type and scope issue in simulator detection

- Return \.ToArray() instead of ,\ to avoid wrapping
  the list in a single-element array
- Use \.usedImages instead of undefined \ in RID
  inference block

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify ParseOnly .NET Libraries section shows only frame-relevant images

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix YAML escape in assertion pattern (use single quotes for regex backslash)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Tighten stop signal to prevent Android symbolication spillover

The apple-crash-symbolication skill's stop signal for wrong file formats
was naming specific Android tools (ndk-stack, addr2line) and the
android-tombstone-symbolication skill. This caused models to learn about
Android symbolication from the Apple skill and then actually execute it,
resulting in 4-5x token bloat and completion regression on the Android
rejection eval scenario.

Remove tool suggestions from the stop signal — just say 'stop, don't
symbolicate.' The Android skill handles its own routing when loaded.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Simplify scenario 3 rubric to focus on positive skill knowledge

Replace 4 rubric items (including 2 'Did NOT' items) with 2 items
that test positive knowledge the skill provides. The 'Did NOT' items
gave credit to baseline responses that also don't attempt iOS workflow
(because they don't know about it), minimizing the quality delta.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix nuget.org domain reference: drop www. prefix to match known-domains.txt

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Merge upstream main and use api.nuget.org v3 endpoint

Main changed known-domains.txt to use path-scoped entries
(nuget.org/account/trustedpublishing instead of bare nuget.org).
Switch the symbols download URL to the v3 flatcontainer endpoint
on api.nuget.org which is in the allowlist.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix .gitignore merge conflict

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Steve Pfister <steveisok@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Steve Pfister <stpfiste@microsoft.com>
Co-authored-by: Viktor Hofer <viktor.hofer@microsoft.com>
Co-authored-by: Viktor Hofer <7412651+ViktorHofer@users.noreply.github.com>
Co-authored-by: Dan Moseley <danmose@microsoft.com>
2026-04-10 10:54:46 -04:00
Amaury Levé 93dc33da86 Stabilize and unify some test skills (#501)
* Deduplicate test skill references and clarify skill boundaries

- Move platform-detection.md and filter-syntax.md to plugins/dotnet-test/shared/,
  removing 3 identical copies of each from run-tests, mtp-hot-reload, and
  migrate-vstest-to-mtp reference directories.

- Move dotnet.md from exp-test-smell-detection/extensions/ to shared/ as
  dotnet-test-frameworks.md in both dotnet-test and dotnet-experimental plugins.
  Update exp-assertion-quality, exp-test-boilerplate-detection, exp-test-tagging,
  and test-anti-patterns to reference the shared file instead of inlining
  framework detection tables.

- Differentiate test-anti-patterns (quick pragmatic review) from
  exp-test-smell-detection (deep formal audit with academic taxonomy) by updating
  descriptions and cross-referencing each other in When Not to Use sections.

- Update skill-validator to allow ../../shared/ file references while still
  blocking other parent-directory traversals. Add tests for the new rule.

* Switch from shared/ directories to hidden reference skills

Replace the plugin-level shared/ directories with non-invocable reference
skills (user-invocable: false) that other skills reference by name.

- Create platform-detection, filter-syntax, and dotnet-test-frameworks as
  hidden skills under plugins/dotnet-test/skills/. These contain the
  detection tables and syntax references previously duplicated across
  run-tests, mtp-hot-reload, and migrate-vstest-to-mtp.

- Create exp-dotnet-test-frameworks as a hidden skill under
  plugins/dotnet-experimental/skills/ for the experimental test analysis
  skills (exp-test-smell-detection, exp-assertion-quality, etc.).

- Update all consuming skills to reference these by skill name in backtick
  notation instead of file links.

- Revert the skill-validator ../../shared/ exception — no longer needed
  since all references now use the standard skill name mechanism.

* Merge exp-test-boilerplate-detection into exp-test-maintainability

exp-test-maintainability was only 6 calibration rules with no workflow.
exp-test-boilerplate-detection had the full 5-category detection workflow,
examples, calibration, and validation. Merge the boilerplate content into
exp-test-maintainability (the broader, more user-facing name) and add the
two unique maintainability rules (DisplayName guidance, DataRow vs
DynamicData preference) to Category 3.

- Replace exp-test-maintainability SKILL.md with the merged content
- Move test fixtures from exp-test-boilerplate-detection to exp-test-maintainability
- Merge eval.yaml scenarios (4 total: 2 from each original skill)
- Delete exp-test-boilerplate-detection skill and tests
- Update all cross-references in exp-test-smell-detection, dotnet-test-frameworks,
  exp-dotnet-test-frameworks, and CODEOWNERS

* Add cross-references to test-anti-patterns for deep mock and duplication analysis

Point users to exp-mock-usage-analysis from the Over-mocking entry and
to exp-test-maintainability from the Duplicate tests entry.

* Add exp-dotnet-test-frameworks to CODEOWNERS

* Improve run-tests SDK 10 MTP detection for blame-hang scenario

Inline the critical SDK 10 detection signal (global.json test.runner)
directly in Step 1 instead of deferring entirely to the platform-detection
skill. This makes the distinction between SDK 10 (no -- separator) and
SDK 8/9 (requires -- separator) more prominent.

Add a quick detection summary table, strengthen the Common Pitfalls entry
for SDK 10 with a blame-hang-timeout example, and keep the
platform-detection skill reference for the full detection logic.

* Improve skill activation keywords in descriptions

- exp-test-maintainability: Add 'suggest a better test structure',
  'consolidate similar test methods', 'convert copy-paste tests to
  data-driven parameterized tests' to match prompts like 'each new case
  needs a whole new method, suggest a better structure'.

- test-anti-patterns: Add 'review tests', 'find test problems', 'check
  test quality', 'audit tests for common mistakes' to match review-style
  prompts that don't use the word 'anti-pattern'.

- run-tests: Add 'hang timeout', 'blame-hang', 'blame-crash', 'TUnit'
  to match SDK 10 blame scenarios and TUnit filter scenarios that were
  intermittently not activating.
2026-04-08 13:47:09 +02:00
Mukund Raghav Sharma (Moko) 665c39e957 Add configuring-opentelemetry-dotnet skill (#268)
* Add configuring-opentelemetry-dotnet skill (+8.1% eval, near-miss)

Teaches OpenTelemetry SDK configuration in ASP.NET Core: package selection,
AddOpenTelemetry with tracing/metrics/logging, custom ActivitySource and
Meter creation, OTLP exporter setup, and context propagation.

Eval results: +8.1% improvement (threshold: 10%, near-miss)
Includes eval.yaml with OTel setup scenario + negative test.

* Sharpen eval.yaml: add custom-spans-invisible pain-point and name-matching rubric emphasis

* Migrate configuring-opentelemetry-dotnet to plugins/ directory structure

* Move OpenTelemetry skill to new dotnet-aspnet plugin, address review feedback

- Move skill from plugins/dotnet-diag to new plugins/dotnet-aspnet plugin
- Create dotnet-aspnet plugin.json
- Fix SKILL.md frontmatter: remove code fence wrapper so YAML metadata parses
- Fix undefined 'order' variable in ProcessOrderAsync example
- Move SqlClient/Runtime instrumentation to clearly marked optional sections
- Add missing using directives (System.Diagnostics, OpenTelemetry.Context.Propagation)
- Handle null Activity.Current in context propagation snippet
- Use IMeterFactory via DI instead of static Meter per official guidance
- Add OpenTelemetry.Instrumentation.Http to eval rubric package list
- Simplify eval prompt to be more natural/generalized
- Update CODEOWNERS: add dotnet-aspnet plugin entries, remove old dotnet-diag entries

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Configure metrics OTLP exporter endpoint explicitly to match tracing config

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address round 2 review: logging endpoint, marketplace, RecordException using, ActivitySource in propagation, HttpClient pitfall

- Configure logging OTLP exporter endpoint explicitly for consistency
- Add dotnet-aspnet to both marketplace.json files
- Add 'using OpenTelemetry.Trace' for RecordException extension method
- Declare ActivitySource in context propagation snippet
- Fix HttpClient instrumentation pitfall (works with new HttpClient() too)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify logging package source and add ActivitySource registration reminder

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add @dotnet/aspnet team to skill CODEOWNERS entries

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add dotnet-aspnet to README table, make propagation ActivitySource static

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add expect_activation:false, IMeterFactory using, clarify OTLP exporter scope

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add OtlpExporter using directive, clarify OTLP package covers logging

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove Prometheus from OTLP claim, add OTLP exporter assertion to eval

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify Jaeger is traces-only, document logging package provenance

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix eval: increase timeout, reject tools, rewrite prompt as explanation-only

- Scenario 1: rewrite prompt to ask for code explanation (not file
  modification), add reject_tools to prevent bash/edit overhead,
  increase timeout 120s->360s, update rubric wording
- Scenario 2: add reject_tools to eliminate tool-overhead noise

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve OTel skill evals and address review feedback

- Remove redundant per-skill CODEOWNERS lines (ViktorHofer feedback)
- Add SetResourceBuilder + ParseStateValues to SKILL.md Step 3 (logging provider gap)
- Rewrite eval scenarios: 2 targeted positive scenarios testing real skill gaps
- Remove noisy negative activation scenario (high variance, -21.5% drag)
- Eval results: +14.2% improvement (threshold: 10%), overfitting 0.10 (low)
  Scenario 1: 3.0/5 -> 5.0/5, Scenario 2: 3.8/5 -> 5.0/5

* Add propagate-trace-context scenario to OTel evals (+25.6%)

Third scenario tests trace context propagation across message queues,
where the base model scores 3.2/5 and skill-enhanced scores 5.0/5.

Removed metrics and debug scenarios that baseline already aced (5.0/5)
which only added token cost without measurable improvement.

Final: 3 scenarios, +25.6% improvement, overfitting 0.09 (low)

* Remove duplicate dotnet-aspnet CODEOWNERS entries (L69-70 shadowed by L86-87)

* Use @dotnet/aspnet team alias in CODEOWNERS for wider reach

* Addressed feedback

---------

Co-authored-by: Dan Moseley <danmose@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Viktor Hofer <7412651+ViktorHofer@users.noreply.github.com>
2026-04-07 03:32:05 -07:00
David Ortinau c4b6819dda Add 7 core .NET MAUI development skills to dotnet-maui plugin (#456)
* Add 7 core .NET MAUI development skills to dotnet-maui plugin

Add maui-shell-navigation, maui-collectionview, maui-data-binding,
maui-dependency-injection, maui-app-lifecycle, maui-safe-area, and
maui-theming skills with eval.yaml tests and reference docs.

Update plugin.json, marketplace.json (both copies), and CODEOWNERS.

Resolves #455

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix cross-skill references to non-existent skills

Replace 10 dangling references to skills not in this repo
(maui-deep-linking, maui-platform-invoke, maui-unit-testing,
maui-maps, maui-animations, maui-accessibility, maui-app-icons-splash,
maui-bootstrap-theme, maui-localization) with plain-English guidance
or references to skills that exist in this PR.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix code correctness bugs and remaining cross-references

Address PR review feedback and skeptic review findings:

Code correctness:
- Fix BackgroundColor="Primary" (XAML crash) → use {StaticResource Primary}
- Fix MergedDictionaries.Clear() (nukes all styles) → remove-then-add pattern
- Fix HorizontalStackLayout Fill (no effect) → use Grid with ColumnDefinitions
- Fix AncestorType with ViewModel type → use ContentPage (visual element)
- Fix Frame usage → replace with Border (recommended control)
- Remove redundant MultiBinding StringFormat="{}{0}"
- Fix OnStart reference → use CreateWindow for theme restore
- Soften lifecycle OnStart/OnSleep characterization (compat shims, not absent)
- Qualify ResourceDictionary code-behind requirement (only for x:Class)

Cross-references:
- Remove all remaining body-text refs to non-existent skills
- Replace with Microsoft Learn doc links or generic guidance

Eval:
- Relax SafeAreaRegions assertion to accept SafeAreaEdges or SafeAreaRegions
- Relax theming rubric for ResourceDictionary code-behind

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Restore Clear() theme pattern with clarifying comment

The Clear()+Add() pattern is intentional — theme dictionaries are designed
to be the only merged dictionaries in this architecture. Added comment
explaining the assumption and what to do if non-theme dictionaries exist.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix second-pass review findings: API accuracy and eval robustness

Code correctness:
- ScrollView SafeAreaEdges="All" → "Container" (ScrollView only honors
  Container and None; All silently fails for keyboard avoidance)
- DI CreateWindow example: add comment noting AppShell must be registered
- AddHttpClient: add comment noting Microsoft.Extensions.Http NuGet required
- MultiBinding: remove redundant StringFormat from reference doc (matches SKILL.md)
- RelativeSource Self table: Path=Width → Path=WidthRequest (Width is
  read-only -1 before layout; WidthRequest is the correct bindable property)
- CollectionView StackLayout warning: clarify it refers to BindableLayout
  on StackLayout vs CollectionView ItemsLayout types
- SafeAreaEdges: fix "attached property" → "property" (it's a regular property)
- ios:NavigationPage example: add xmlns comment for ios namespace

Eval assertions:
- DI Scoped regex: accept "doesn't"/"lacks"/"without" not just "no"
- CollectionView ViewCell: match negation in either direction around ViewCell
- Lifecycle events: require 3+ distinct events instead of any single one

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix final PR review comments

- safe-area eval: tighten Container assertion to require SafeAreaEdges context
- DI: merge #else fallback into single compilable #if block
- lifecycle: behaviour → behavior (American English consistency)
- theming: macOS Catalyst minimum 10.14 → 10.15 (Catalina required)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-04-02 15:48:30 +02:00
Amaury Levé 948a9a52ef Add exp-mock-usage-analysis skill and evaluation (#483)
* Add exp-mock-usage-analysis skill and evaluation

New experimental skill that detects unused, redundant, or unnecessary
mocks in .NET test suites. Covers Moq, NSubstitute, FakeItEasy, and
manual test doubles.

- SKILL.md with 6-step workflow: gather code, classify mocks, detect
  anti-patterns, incorporate runtime data, generate recommendations,
  report findings
- eval.yaml with 10 scenarios: trivial type mocking, unused setups,
  redundant configs, stable utility mocks, well-placed mocks (no false
  positives), NSubstitute support, FakeItEasy support, setup sprawl,
  and 2 non-activation boundary tests
- Fixture files for each scenario with production + test code
- CODEOWNERS entry for @dotnet/dotnet-testing

* Remove no-headroom scenarios, increase NSubstitute timeout

Remove 4 scenarios where baseline already scores 5.0/5 (model handles
these well without skill guidance):
- Detect mocking of DTOs, records, and enums
- Recognize well-placed mocks without inventing false positives
- Decline when asked about non-mock test anti-patterns
- Decline mock framework migration request

Increase NSubstitute scenario timeout from 120s to 180s to avoid
baseline timeouts impacting scoring.

Remaining 6 scenarios all show positive skill impact (3→5, 3→4, etc).

* Document areas the model handles well without the skill

Add a subsection under 'When Not to Use' listing mock-related tasks
where the base model already scores 5.0/5 without skill guidance:
- Mocking trivial types (DTOs, records, enums)
- Recognizing well-placed mocks (no false positives)

* Fix md

* Improve
2026-04-02 10:03:17 +00:00
Amaury Levé d5ca4c6c01 Add exp-test-smell-detection skill and evaluation (#491)
* Add exp-test-smell-detection skill and evaluation

- Language-agnostic core skill detecting 10 test smells (conditional logic,
  mystery guest, sleepy test, assertion-free, eager test, magic numbers,
  sensitive equality, exception handling, general fixture, ignored tests)
- .NET extension with framework-specific detection tables (MSTest/xUnit/NUnit/TUnit)
- Reference catalog with 19 smells from testsmells.org research
- Evaluation with 4 scenarios: smelly suite, clean suite, integration tests, non-activation
- CODEOWNERS entry for @dotnet/dotnet-testing

* Improve integration test fixture and non-activation timeout

- Add real smells to integration test fixture (Thread.Sleep, conditional
  logic, assertion-free test) mixed with legitimate integration patterns
- Update rubric to test nuanced distinction between real smells and
  acceptable integration test patterns
- Increase non-activation scenario timeout from 120s to 300s to prevent
  timeout-related scoring penalties

* Fix test projects

* Add domains for testsmells

* Remove extra domains
2026-04-02 11:51:19 +02:00
Dan Moseley 165e6439fe Tighten known-domains allowlist (#496)
* Tighten known-domains allowlist

Narrow broad domain entries to specific paths/subdomains actually used:
- aka.ms -> aka.ms/dotnet-trace, aka.ms/perfcollect
- nuget.org -> api.nuget.org, www.nuget.org/account/trustedpublishing
- npmjs.com/package/@modelcontextprotocol -> pinned to inspector/v/0.21.1

Remove unused domains: fluentassertions.com, speedscope.app
Update skill content to match: pin MCP Inspector link, remove
FluentAssertions link, remove speedscope hyperlink.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* updated mcp skills codeowner

* Refine scoped known-domain entries

Remove the remaining nugettest.org publish example and drop the nugettest.org allowlist entry. Also normalize path-scoped entries to omit a hardcoded www prefix so both host forms match the existing ReferenceScanner logic.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Leslie Richardson <lerich@microsoft.com>
2026-04-02 03:35:54 +00:00
Amaury Levé eb0f98eba6 Add exp-test-gap-analysis skill for pseudo-mutation test gap detection (#490)
New experimental skill that performs pseudo-mutation analysis on .NET
production code to find gaps in existing test suites. Covers boundary,
boolean/logic, return value, exception removal, arithmetic, and
null-check mutation categories.

Includes eval.yaml with 4 scenarios (boundary gaps, logic gaps,
well-tested code recognition, non-activation) and fixture projects.
2026-04-01 21:19:36 +02:00
Mukund Raghav Sharma (Moko) c92faa7800 Add minimal-api-file-upload skill (#264)
* Move minimal-api-file-upload skill to aspnetcore plugin with 3 eval scenarios

Per repo restructuring feedback, ASP.NET Core specific skills should
be under the aspnetcore plugin rather than the dotnet plugin.

* Increase eval timeouts to 180s to avoid timeout-related scoring penalties

* Generalized and addressed feedback

* Improve eval scenarios: remove noisy tests, add dual-limit and security review scenarios

* Add CODEOWNERS for aspnetcore plugin

* Fix eval: enrich prompts for skill activation, bump security review timeout to 240s

* Drop size-limit scenario (baseline already 5.0), keep 3 high-signal scenarios

* Reframe security review as file upload fix to improve skill activation

* Review

* Contribution guide followed

* Updated name

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet-aspnet/skills/minimal-api-file-upload/SKILL.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Address PR #264 review feedback from Brennan and Copilot

- Rename plugin from aspnetcore to dotnet-aspnet per repo conventions
- Fix streaming filename: remove user-controlled extension, use bare GUID
- Remove explicit sanitization code (Option B) per Brennan's feedback
- Add case-insensitive MIME type comparison
- Validate ContentType matches magic bytes (reject mismatches)
- Fix stream rewind + CopyToAsync: copy from already-opened stream
- Reword streaming section to accurately describe buffering vs chunks
- Update marketplace.json, README.md, CODEOWNERS for dotnet-aspnet rename

---------

Co-authored-by: Viktor Hofer <7412651+ViktorHofer@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
2026-03-31 10:41:25 +02:00
Amaury Levé b527b41573 Add exp-test-boilerplate-detection and exp-assertion-quality skills (#468)
Two new experimental skills for dotnet-experimental plugin:

- exp-test-boilerplate-detection: Detects duplicate boilerplate patterns
  across .NET test suites and identifies refactoring opportunities.
  Categories: repeated construction, assertion patterns, copy-paste
  methods, duplicated setup/teardown, repeated infrastructure.

- exp-assertion-quality: Analyzes assertion variety and depth across
  .NET test suites. Produces metrics dashboard including assertion
  count, type spread, trivial %, assertion-free tests, and negative
  assertion coverage.

Both skills include eval.yaml with 3-4 scenarios each (positive,
negative, and non-activation) plus test fixtures.
2026-03-30 13:01:03 +00:00
Amaury Levé a220f36256 Add exp-test-maintainability skill for test structure review (#418)
New experimental skill that assesses test maintainability: duplication,
test size, data-driven patterns, display names, builder/helper extraction,
and shared setup.
2026-03-26 14:28:43 +01:00
leslierichardson95 7286c31118 Add skills for C# MCP Server Development (#317)
* Add C# MCP server skills (create, debug, test, publish)

Four new skills for the C# MCP server development lifecycle:
- mcp-csharp-create: Scaffolding with dotnet new mcpserver, tools/prompts/resources, transport config
- mcp-csharp-debug: MCP Inspector, VS Code integration, breakpoint debugging, logging
- mcp-csharp-test: Unit tests with ClientServerTestBase, integration with WebApplicationFactory, evals
- mcp-csharp-publish: NuGet packaging, Docker/Azure deployment, MCP Registry publishing

Each skill includes SKILL.md with progressive disclosure references/ and eval.yaml tests.

* Fix mcp-csharp-create eval: use regex assertions for combined attribute syntax

Replace scaffolding-heavy scenarios with implementation-focused ones that
test MCP-specific features (resources, prompts, logging). Fix assertion
patterns to match combined C# attribute syntax [McpServerTool, Description()]
instead of requiring standalone [McpServerTool]. Increase timeouts to 180s
to account for skill-reading overhead.

Validator result: passed=True, improvement=44.6% (threshold=10%)

* Add CODEOWNERS entries for MCP C# skills (create, debug, publish, test)

* Update plugins/dotnet/skills/mcp-csharp-test/references/test-patterns.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet/skills/mcp-csharp-debug/SKILL.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet/skills/mcp-csharp-publish/SKILL.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet/skills/mcp-csharp-publish/references/nuget-packaging.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet/skills/mcp-csharp-debug/SKILL.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Remove evaluation step and guide from mcp-csharp-test skill

* Add CODEOWNERS entries for dotnet-maui skills

* Update CODEOWNERS to add @artl93 as co-owner for mcp-csharp skills

* Replace parent-directory file references with backtick skill names

Cross-skill references used ../sibling/SKILL.md paths which the
validator rejects. Replace with backtick-quoted skill names to match
the convention used by other skills in the repo.

* Add known domains for MCP server development skills

Add domains referenced by the mcp-csharp-* skills:
- github.com/modelcontextprotocol/registry
- github.com/open-telemetry/semantic-conventions
- npmjs.com, xunit.net, fluentassertions.com, nugettest.org

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update Docker commands to use placeholder for registry and image names

* moved mcp skills and their evals into dotnet-ai plugin

* cleaned up moved files to dotnet-ai

* cleaned up files

* Update .github/CODEOWNERS

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update nuget-packaging.md

* Update repository URL format in nuget-packaging.md

* Add github.com/ to known-domains to allow truncated placeholder URLs

The URL regex truncates at angle brackets (invalid in URIs), so
placeholder URLs like https://github.com/<yourusername>/<repo>
become https://github.com/ which didn't match any path-scoped entry.
Adding github.com/ (with trailing slash) covers only this case without
broadly allowing all github.com URLs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update Docker tag command to use placeholder for server name

* Update known domains and fix GitHub username placeholders in documentation

* Remove McpServerToolType from mcp-csharp-create eval

McpServerToolType is only needed with WithToolsFromAssembly(), which is
discouraged because it is not Native AOT compatible. Updated eval assertions
and rubrics to prefer WithTools<T>() instead.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve eval resilience for mcp-csharp-create and mcp-csharp-debug

- Increase mcp-csharp-create timeouts from 180s (or default 120s) to 360s
  for all 3 scenarios. These scenarios consistently time out because the
  model spends time on bash exploration/scaffolding before writing code.

- Add explicit timeout to scenario 3 which was relying on the 120s default.

- Broaden mcp-csharp-debug Inspector rubric to accept both the concise
  single CLI command style and the step-by-step UI configuration walkthrough,
  since both are correct approaches.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update eng/known-domains.txt

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Broaden debug 'failing tool' rubric to accept multiple debugging approaches

The rubric criterion 'Shows how to attach a debugger' was too narrow.
The skilled answer correctly focused on the #1 cause (stdout pollution)
but scored low because it didn't show a specific 'attach to process' flow.
Broadened to accept any valid debugging approach: attaching, Debugger.Launch(),
or launch.json configuration.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix 4 eval failures in mcp-csharp-debug and mcp-csharp-test skills

mcp-csharp-debug:
- Trim SKILL.md verbosity (183->160 lines) and mcp-inspector.md (67->54 lines)
- Add Diagnosing Tool Errors section covering debugger, output panel, Inspector, common culprits
- Rebalance debugging narrative away from stderr-only focus
- Move HTTP logging config to ide-config.md reference

mcp-csharp-test:
- Add eval/evaluations keywords to frontmatter for activation
- Add HTTP tool invocation test pattern (tools/call via WebApplicationFactory)
- Trim test-patterns.md bloat (remove Test Categories, Coverage, Input Validation)
- Create references/evaluations.md with qa_pair format and read-only/deterministic guidance

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Dan Moseley <danmose@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-25 14:17:57 -06:00
Jeff Schwartz 55a7d80527 adding SIMD/TensorPrimitives to dotent-diag/analyzing-dotnet-performance (#330)
* incorporated feedback from previous pr, iterated with 100+ scalar loop tests to come to this skill, moved from skill to reference in the performance skill

* Update tests/dotnet-diag/analyzing-dotnet-performance/eval.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update tests/dotnet-diag/analyzing-dotnet-performance/eval.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet-diag/skills/analyzing-dotnet-performance/references/simd-vectorization.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet-diag/skills/analyzing-dotnet-performance/references/simd-vectorization.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet-diag/skills/analyzing-dotnet-performance/references/simd-vectorization.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update plugins/dotnet-diag/skills/analyzing-dotnet-performance/references/simd-vectorization.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Address review feedback on SIMD vectorization reference

- Check Span<T>/MemoryExtensions before TensorPrimitives (no extra dependency)
- Add all supported types (sbyte, ushort, uint, ulong, nint, nuint, char via ushort)
- TensorPrimitives: add constraint and applicable types columns (not just float/double)
- Add FusedMultiplyAdd, clarify AddMultiply vs MultiplyAdd distinction
- Prefer portable APIs over platform-specific intrinsics (allow when perf justifies)
- Fix dispatch pattern to use if/else if to avoid pessimizing small inputs
- Remove LINQ references

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* addressing more feedback

* move to the experimental plugin

* move the simd tests to exprimental

* add codeowners

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-25 10:51:28 -06:00
Amaury Levé 1d56634150 Create experimental plugin (#446) 2026-03-25 16:11:07 +00:00
Amaury Levé 6489fbee39 Add exp-test-anti-patterns skill for test quality review (#415)
New experimental skill that detects anti-patterns and code smells in .NET
test suites. Covers assertion quality, test isolation, naming, flakiness
indicators, over-mocking, and structural problems across MSTest, xUnit,
NUnit, and TUnit.

Key features:
- 4-tier severity classification (Critical/High/Medium/Low)
- False-positive avoidance: calibrates severity honestly and recognizes
  well-written tests without inventing problems
- Positive observations alongside findings

Evaluation results (3 runs, claude-opus-4.6):
- Flakiness/coupling detection: 3.0 -> 5.0 (isolated), 4.0 (plugin)
- Duplicates/magic values: 3.0 -> 5.0 (isolated), 4.7 (plugin)
- Well-written test recognition: 2.0 -> 5.0 (both modes)
- Mixed severity detection: 5.0 baseline maintained
- Overfitting score: 0.06 across all scenarios
2026-03-20 14:04:18 +00:00
YuliiaKovalova dcba4f3d8e Add dotnet-template-engine plugin (#341)
* Add dotnet-template-engine plugin

Add template-engine skills for .NET project scaffolding powered by the
DotnetTemplateMCP MCP server (v1.1.0). Includes three skills and one agent:

Skills:
- template-discovery: find, inspect, and compare templates with intent
  resolution (70+ keyword mappings)
- template-instantiation: create projects with CPM adaptation, latest NuGet
  versions, parameter validation, and multi-template composition
- template-authoring: create templates from existing projects and validate
  template.json for authoring issues

Agent:
- template-engine: expert agent that routes to the appropriate skill based
  on user intent

Also adds CODEOWNERS entries, marketplace.json registration, eval tests,
and .mcp.json for DotnetTemplateMCP server configuration.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review feedback: mcpServers in plugin.json, expect_tools, path fix

- Move MCP server config into plugin.json under mcpServers so SkillValidator
  discovers the template_* tools during evaluation runs
- Add expect_tools constraints to all eval scenarios to verify actual MCP
  tool invocation instead of relying on rubric text alone
- Fix frontmatter path: template.config → .template.config (leading dot)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update DotnetTemplateMCP to v1.2.0

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Include 'dotnet new' in agent description for discoverability

Address review feedback from danmoseley: the frontmatter description
is how the caller decides whether to load the agent tokens, so it
needs to mention 'dotnet new' as a trigger keyword.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove MCP server configuration and references

- Delete .mcp.json MCP server config file
- Remove mcpServers section from plugin.json
- Remove MCP/DotnetTemplateMCP references from agent, skills, and marketplace descriptions
- Skills and eval files remain unchanged

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove ghost tool references and add CLI fallback guidance

- Remove references to 4 non-existent tools: template_compose,
  template_suggest_parameters, template_validate, solution_analyze
- Replace with real alternatives (template_inspect, manual review,
  sequential template_instantiate, direct file inspection)
- Add CLI fallback guidance so LLMs degrade gracefully when
  template tools are unavailable
- Fix authoring eval to not expect template_validate tool

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review feedback: CODEOWNERS naming, claude marketplace, README

- Rename CODEOWNERS header to dotnet-template-engine for consistency
- Mirror plugin entry in .claude-plugin/marketplace.json
- Add plugin to README What's Included table

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix PR review comments: align eval rubric with expect_tools and sync marketplace.json

- Updated template-discovery eval.yaml rubric to match expect_tools
  (removed 'or template_search' since expect_tools enforces template_from_intent)
- Made .claude-plugin/marketplace.json byte-for-byte identical to
  .github/plugin/marketplace.json (removed extra trailing newline)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review comments: strengthen eval assertions and fix rubrics

- Add exit_success assertions to all eval scenarios
- Add file_exists and file_contains assertions for template-instantiation
- Add output_contains for shortName and datatype in template-authoring
- Fix rubrics to reference actual tools (skill + dotnet new CLI) instead
  of non-existent MCP tools (template_from_intent, template_inspect,
  template_instantiate) which caused the judge to penalize quality scores
- Update expect_tools from non-existent MCP tools to 'skill'
- Change plugin version from 1.2.0 to 0.1.0 for consistency with other plugins
- Remove extra blank line in README.md after plugin table

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Rewrite skills and agent to use dotnet new CLI instead of phantom MCP tools

The SKILL.md files and agent.md referenced MCP tools (template_from_intent,
template_inspect, template_instantiate, template_dry_run, etc.) that are
not available at runtime since no MCP server is declared in plugin.json.
This caused the agent to waste tokens attempting to find these tools before
falling back to dotnet new CLI commands.

Changes:
- template-discovery/SKILL.md: Replace MCP tool calls with dotnet new
  search, dotnet new list, dotnet new --help, and dotnet new --dry-run.
  Add intent-to-template keyword mapping table.
- template-instantiation/SKILL.md: Replace template_instantiate with
  dotnet new CLI commands. Add explicit CPM adaptation steps and
  multi-project composition with dotnet sln/dotnet add reference.
- template-authoring/SKILL.md: Replace template_create_from_existing
  with manual template.json creation guidance including example JSON.
  Replace template_dry_run/template_instantiate with CLI equivalents.
- template-engine.agent.md: Replace Available Tools table with CLI
  Commands Reference. Update all workflow steps to use CLI commands.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix file assertion paths: remove ./ prefix for glob matcher compatibility

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Dan Moseley <danmose@microsoft.com>
2026-03-18 22:51:20 +01:00
Jeff Handley 646b5d93b0 Add Skill: Convert to Central Package Management (convert-to-cpm) (#75)
* Add convert-to-cpm skill for NuGet Central Package Management conversion

Authoring process:
- Researched the Agent Skills standard at agentskills.io and reviewed repo conventions
- Studied the existing csharp-scripts skill and test structure as a reference implementation
- Studied Microsoft's CPM documentation at learn.microsoft.com
- Authored SKILL.md with a 9-step workflow covering scope determination through validation
- Created 5 test scenarios across simple, moderate, and advanced tiers
- Performed dry-run evaluation against all scenarios, identifying 15 findings
- Applied all 15 fixes (4 gaps, 6 ambiguities, 5 improvements) to SKILL.md
- Re-evaluated: 50 OK, 0 gaps, 0 ambiguities, 1 test fixture improvement
- Updated test fixture to resolve the remaining finding
- Final validation: 254 lines, 0 errors, 0 warnings

Skill implementation (skills/convert-to-cpm/SKILL.md):
- 9-step workflow: scope, CPM check, audit, create/update props, update projects, handle properties, restore/validate, cleanup, summary
- Handles single projects, solutions, and full repositories
- Audits packages with per-project detail table including version conflicts and security advisories
- Flags CVE/security vulnerabilities and recommends patched versions
- Supports MSBuild property-based versioning with inline vs keep decisions
- Covers conditional PackageReference items across target frameworks
- Discovers PackageReference in imported .props/.targets via Import chain scanning
- Provides cross-platform commands (Unix and Windows/PowerShell)
- Documents import order requirements for property references in Directory.Packages.props
- Mentions dotnet new packagesprops as preferred creation method (.NET 8+)
- Includes validation checklist and common pitfalls table

Test scenarios (tests/convert-to-cpm/):
- simple-single-project: 1 project, 3 packages, no conflicts
- simple-solution: 3 projects via .sln, 5 packages, PrivateAssets preservation
- moderate-version-conflicts: 4 projects, System.Text.Json version conflicts with CVE-2024-43485 advisory, AutoMapper major version conflict with VersionOverride
- moderate-msbuild-properties: 2 projects using MSBuild properties for versioning in Directory.Build.props, inline vs keep decisions, property cleanup verification
- advanced-multi-complexity: 5 projects combining version conflicts, MSBuild properties, conditional TFM PackageReference, shared Common.props imports, VersionOverride, and security advisory handling

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refactor SKILL.md with references, baseline build, and package comparison

Condensed SKILL.md using progressive disclosure:
- Reduced from 254 lines / ~3937 tokens to 120 lines / ~1778 tokens
- Extracted detailed procedural instructions into 5 focused reference files
- Main file retains workflow decision logic with links to references loaded on demand
- Follows agentskills.io progressive disclosure pattern: metadata -> instructions -> resources

Added baseline build verification (new Step 2):
- Requires clean build (dotnet clean && dotnet build) before any changes
- Captures baseline.binlog for structured build artifact
- Captures baseline-packages.json via dotnet list package --format json
- Blocks conversion if baseline build fails

Added post-conversion baseline comparison (Steps 8 and 10):
- Step 8 produces after-cpm.binlog and after-cpm-packages.json from clean build
- Step 10 compares baseline vs post-conversion package lists per project
- Changes table shows version bumps, VersionOverride entries, added/removed packages
- Unchanged table confirms version-neutral conversion for unmodified packages
- Binlog files produced as artifacts for user review in MSBuild Structured Log Viewer

Reference files created:
- references/audit-complexities.md: 7 complexity categories for package auditing
- references/baseline-comparison.md: dotnet list package comparison procedure, binlog production, artifact guidance, table formats for changes and unchanged packages
- references/directory-packages-props.md: File creation (dotnet new packagesprops), placement rules, conditional versions, VersionOverride patterns
- references/msbuild-property-handling.md: Property usage search, inline vs keep decisions, import order requirements, cleanup verification
- references/validation-and-errors.md: NuGet error codes (NU1008, NU1010, NU1507), clean build validation, multi-TFM guidance, common pitfalls

Workflow is now 10 steps (was 9):
1. Determine scope
2. Establish baseline build (new)
3. Check for existing CPM
4. Audit package references
5. Create or update Directory.Packages.props
6. Update project files
7. Handle MSBuild version properties
8. Restore and validate (now with binlog + package list capture)
9. Clean up obsolete properties
10. Summary and baseline comparison (expanded with diff tables)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Replace third-party packages with Microsoft equivalents, add baseline/comparison steps, add .gitignore for test solutions

Package replacements across all skill references and test scenarios:
- Serilog.AspNetCore -> OpenTelemetry.Extensions.Hosting 1.15.0
- Serilog (standalone) -> OpenTelemetry.Extensions.Hosting 1.15.0
- Swashbuckle.AspNetCore -> Microsoft.AspNetCore.OpenApi 8.0.24
- SerilogVersion MSBuild property -> OTelVersion
- DIVersion updated from 8.0.1 to 9.0.0 (DI/Abstractions alignment)
- Microsoft.AspNetCore.OpenApi uses 8.0.24 (not 9.x) for net8.0 compat

Test fixture improvements:
- Added Step 2 (baseline build with binlog) to all 5 with-skill.md files
- Added Step 10 (package comparison table + binlog artifact links) to all 5 with-skill.md files
- Expanded simple-solution without-skill.md with more realistic agent behavior
- Standardized security fix terminology: table markers cite CVEs, prose references CVE IDs
- Removed space-padded table formatting in favor of compact markdown with emojis

Test solution infrastructure:
- Added tests/convert-to-cpm/.gitignore to exclude src/ build artifacts
- Added generation prompt to test README for recreating buildable solutions
- All 5 test solutions verified to restore and build successfully

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review feedback on terminology, placement, and reference accuracy

- Rename Step 10 and validation checklist from 'binlog comparison' to 'package list comparison'
- Rewrite baseline-comparison.md: title to 'Baseline Comparison', lead with dotnet list package as primary comparison mechanism, position binlogs as supplementary artifacts for manual review/troubleshooting
- Add brief definition of binlogs before the artifacts section
- Fix Directory.Packages.props placement guidance: use first common ancestor of all .NET projects instead of assuming repository root (.git), since many repos nest source under src/ or similar
- Update SKILL.md scope input and Step 1 to reference directory-scoped conversion
- Standardize security fix terminology: table markers cite CVEs, prose uses 'security fix for CVE-...'

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review findings: sort PackageVersion, add packages.config scenario, fix commands

Review findings addressed:
1. Fixed BlobsVersion grep step description in advanced scenario
2. Sorted PackageVersion entries alphabetically in all Directory.Packages.props outputs
3. Consolidated baseline-comparison.md to single-table format
4. Added solution file arguments and multi-line commands in test fixtures
5. Added Directory.Packages.props placement question for single-project scenario
6. Created simple-packages-config test scenario (packages.config rejection)
7. Use dotnet new packagesprops in simple-single-project workflow
8. Fixed More Info link text to match reference file title

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix test scenario accuracy: sln/slnx mix, package counts, ImplicitUsings

- Use mix of .sln and .slnx across scenarios (simple-solution and
  moderate-msbuild-properties use .sln; moderate-version-conflicts and
  advanced-multi-complexity use .slnx)
- Fix simple-solution package count from 5 to 6
- Fix advanced user response #2 to reference Azure.Storage.Blobs version
- Add ImplicitUsings to advanced Directory.Build.props in audit and cleanup
- Complete the advanced unchanged table with all expected package entries

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add skill evaluation section to test README

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix Inventory.sln references and make evaluation opt-in

- Fix 4 occurrences of Inventory.sln to Inventory.slnx in
  moderate-version-conflicts/with-skill.md for consistency with the
  scenario README and test solution
- Update test README to only run skill evaluation when the user
  explicitly requests it

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Condense SKILL.md with progressive disclosure

- Remove duplicated bash code blocks from Steps 2 and 8, linking to
  baseline-comparison.md instead
- Merge Steps 7 (MSBuild property decisions) and 9 (cleanup) into a
  single step since both reference msbuild-property-handling.md
- Condense Step 10 summary to reference baseline-comparison.md for
  procedure details
- Reduces from 120 to 97 lines (10 steps to 9 steps)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix Enterprise.sln references to Enterprise.slnx in with-skill.md

Address code review feedback: fix 4 occurrences of Enterprise.sln to
Enterprise.slnx in advanced-multi-complexity/with-skill.md for
consistency with the scenario README and test solution.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve convert-to-cpm skill: preserve whitespace, save summary report, fix links

- Instruct Step 6 to retain each file's existing indentation style and
  blank lines to keep diffs minimal
- Instruct Step 9 to save the full summary as convert-to-cpm.md alongside
  binlog and JSON artifacts, suggesting its contents for a PR description
- Strip en-us/ from learn.microsoft.com links in SKILL.md and
  validation-and-errors.md to make them culture-agnostic
- Update all with-skill.md test expectations to include the convert-to-cpm.md
  create step and artifact mention

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Indicate that the binlog viewer is for the user; not the tool/skill

* Move convert-to-cpm skill and tests to src/dotnet-msbuild layout

Move skill from skills/convert-to-cpm/ to src/dotnet-msbuild/skills/convert-to-cpm/
and tests from tests/convert-to-cpm/ to src/dotnet-msbuild/tests/convert-to-cpm/
to match the repository layout established on main.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Convert tests from with/without-skill format to eval.yaml

Replace manual test approach (README.md + with-skill.md + without-skill.md)
with automated eval.yaml scenarios containing assertions and rubric items.
Add committed test fixture files (.csproj, .sln, .slnx, .props) for each
scenario with copy_test_files setup, replacing the git-ignored generated
solutions.

6 scenarios converted:
- simple-single-project: basic single project CPM conversion
- simple-solution: multi-project solution conversion
- simple-packages-config: negative test (packages.config rejection)
- moderate-version-conflicts: version conflict resolution
- moderate-msbuild-properties: MSBuild property version handling
- advanced-multi-complexity: combined complexities (conflicts, properties,
  conditionals, shared props)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Consolidate eval.yaml files into single root eval.yaml

Move all 6 scenario definitions from individual subdirectory eval.yaml
files into a single src/dotnet-msbuild/tests/convert-to-cpm/eval.yaml
file, matching the skill-validator discovery convention that expects
{testsDir}/{skillname}/eval.yaml. Scenario prompts updated to reference
subdirectory-prefixed paths since copy_test_files now copies all fixture
subdirectories.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Reorganize convert-to-cpm into plugins/tests folders

* Add post-conversion reporting rubrics to CPM eval scenarios

Add rubric items for baseline-vs-result comparison reporting, binlog
capture and guidance, version reconciliation, and risk/reassurance
messaging across all conversion scenarios. Increase complex scenario
timeout to 360s.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve post-conversion reporting, conflict resolution, and skill activation

SKILL.md:
- Surface binlog capture commands explicitly in Steps 2 and 8
- Expand Step 4 with detailed version conflict presentation and
  resolution workflow
- Restructure Step 9 into 5-section post-conversion report template:
  overview, conflict resolutions, baseline comparison, risk assessment,
  and artifacts/next steps with binlog education
- Broaden activation triggers in description and When to Use to match
  update/bump/upgrade/align/sync terminology from ecosystem PRs
- Add activation for out-of-sync/conflicting/mismatched version scenarios

audit-complexities.md:
- Expand version conflict section with per-conflict presentation format,
  4 resolution options with trade-offs, and risk-level guidance

eval.yaml:
- Pre-specify conflict resolution strategy in prompts to avoid blocking
  on unanswered user prompts during single-turn evaluation
- Add 3 new scenarios testing CPM recommendation when user asks to
  update/align packages without mentioning CPM
- Update rubrics to match directed resolution strategy
- Increase complex scenario timeout to 360s

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR feedback from kartheekp-ms

- Use GitHub markdown URL for CPM docs reference (SKILL.md)
- Use dotnet package list (renamed in .NET 10) with backward compat
  note for dotnet list package (SKILL.md, baseline-comparison.md)
- Use dotnet package list --format json for auditing (SKILL.md Step 4)
- Document Directory.Packages.props sub-folder support for test
  projects with different dependencies (directory-packages-props.md)
- Remove security advisory version bumping from CPM conversion scope;
  instead surface advisories as follow-up items in the post-conversion
  report (audit-complexities.md, SKILL.md Step 9 Section 5)
- Add Follow-up items section to report template covering security
  advisories, deprecated packages, version alignment opportunities,
  and test validation (SKILL.md Step 9)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve convert-to-cpm skill activation, artifact preservation, and eval assertions

- Broaden skill description to trigger on version drift/sync scenarios and
  MSBuild property contexts even when CPM is not explicitly mentioned
- Add explicit instructions to preserve binlog and JSON artifacts (not delete)
- Make convert-to-cpm.md report a mandatory deliverable, not optional
- Replace fragile output_contains assertions (ManagePackageVersionsCentrally,
  Directory.Packages.props) with file_contains checks on the actual generated
  files across 5 conversion scenarios

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Extend timeouts and add CODEOWNERS entry

* Move convert-to-cpm skill into a new dotnet-nuget plugin

* Fix erroneous plugin msbuild/nuget plugin split change. Add dotnet-nuget to marketplace.

* Add NuGet package management skills to README

* Address PR feedback: clarify CPM sub-folder semantics, remove security-fix example, require explicit conflict strategy

- directory-packages-props.md: Clarify that sub-folder Directory.Packages.props
  files are independent and replace (not extend) the parent; require explicit
  MSBuild Import to chain files
- baseline-comparison.md: Replace security-fix upgrade example with version
  conflict alignment example, consistent with audit guidance that security
  advisories are follow-up items
- SKILL.md: Remove default 'use highest version' conflict strategy; require
  explicit user choice or confirmation when conflicts are detected

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Extend eval timeouts for scenarios hitting time limits

- Convert single project: 180s -> 270s
- Recommend CPM (version conflicts): 180s -> 270s
- Recommend CPM (complex repo): 360s -> 540s
- Convert complex repository: 360s -> 540s

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add missing CODEOWNERS for dotnet-nuget plugin. Reorder convert-to-cpm evals and expand timeouts.

* Remove containing skill mentions from reference files; fix ordering

* Replace output_matches with deterministic file assertions in eval.yaml

Convert 6 non-deterministic output_matches assertions to 8 file-based
assertions (file_contains, file_not_contains) across conversion scenarios:

- Scenario 5: Verify PrivateAssets preserved in Tests.csproj
- Scenario 6: Verify OTelVersion/DIVersion removed from Directory.Build.props
- Scenario 7: Verify System.Text.Json and Azure.Identity in Directory.Packages.props
- Scenario 8: Verify System.Text.Json in Directory.Packages.props and
  BlobsVersion/HostingVersion removed from Directory.Build.props

Recommendation-only scenarios and conversational assertions (conflict
detection, conditionals, Common.props awareness) remain as output_matches.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Reorganize skill description with USE FOR / DO NOT USE FOR markers

Restructure the description to improve activation reliability by
adopting the USE FOR / DO NOT USE FOR pattern used by other skills
in the repo (thread-abort-migration, binlog-failure-analysis).

Key changes:
- Front-load activation cues before capability list
- Add explicit USE FOR / DO NOT USE FOR section markers
- Add .sln/.slnx file extensions for solution-path matching
- Move DO NOT USE exclusions into description (was only in body)
- Use YAML folded scalar for multi-line readability

All existing activation keywords preserved. Length reduced from
882 to 849 chars (max 1024).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix issues for external link references

* Increase timeouts

* Handle packages.config non-activation in convert-to-cpm skill

Set expect_activation: false on the packages.config eval scenario so
non-activation is reported as expected rather than flagged as a warning.

Add a packages.config guard in Step 1 of the skill workflow so that if
the skill is activated for a packages.config project, it stops early and
recommends migrating to PackageReference first.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove leading blank lines from .sln test files

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Use imperative 'Read' instead of 'See' for reference file links

Ensures the agent explicitly loads and reads reference files rather than
treating them as optional 'see also' links. This aligns with the repo
convention of explicitly instructing agents to load reference content.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Simplify dotnet-nuget CODEOWNERS

* Simplify packages.config guard

* Add minimal Program.cs entrypoints to Web/Worker test fixtures

Test fixture projects using Microsoft.NET.Sdk.Web and
Microsoft.NET.Sdk.Worker require a Program.cs entrypoint for dotnet build
to succeed. The skill workflow instructs the agent to run dotnet restore
and dotnet build for validation, so these fixtures must be buildable.

Adds minimal entrypoints (with explicit using directives since
ImplicitUsings is not enabled in these projects) to 6 projects:
- simple-solution/Web
- moderate-version-conflicts/Api, Worker
- moderate-msbuild-properties/Api
- advanced-multi-complexity/Api, Web

Also adds Microsoft.Extensions.Hosting package reference to the Worker
project, matching what the dotnet new worker template produces.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Viktor Hofer <viktor.hofer@microsoft.com>
2026-03-18 08:41:57 +01:00
Amaury Levé c55e4f222b Add MSTest migration skills (v1/v2→v3, v3→v4) (#377)
* Add MSTest migration skills (v1/v2→v3, v3→v4)

New dotnet-test plugin with two step-by-step migration skills:

- migrate-mstest-v1v2-to-v3: covers assembly ref (v1) and NuGet (v2) projects,
  assertion overload changes, DataRow constructors, .testsettings replacement,
  timeout unification, and MSTest.Sdk adoption.
- migrate-mstest-v3-to-v4: covers Execute→ExecuteAsync, CallerInfo constructors,
  ClassCleanupBehavior removal, TestContext.Properties generic change, Assert API
  changes, ExpectedExceptionAttribute removal, dropped <net8.0 TFMs, and
  behavioral changes (DisableAppDomain, TestCase.Id, TreatDiscoveryWarningsAsErrors).

Includes eval.yaml test scenarios and fixtures for both skills, plugin.json,
and CODEOWNERS entries.

* Fixes

* Improve results

* Improve

* Improve description

* Copy fix for path

* Bump timeout
2026-03-17 14:25:45 +01:00
Amaury Levé d5d2136157 Update code owners to use team alias (#382) 2026-03-17 08:13:48 +01:00
Amaury Levé 1b8f2aa1e4 Address Copilot review comments on test agent/skills (#351)
Follow-up from PR #343 where copilot added review after the PR was merged
2026-03-15 06:45:40 +00:00
Amaury Levé 7afa81f831 Run tests supports platforms and frameworks (#343) 2026-03-12 21:29:37 +01:00
Jason Malinowski 59241eabcf Add the C# LSP configuration to the 'dotnet' plugin (#298) 2026-03-11 17:23:11 -07:00
Jeff Schwartz 551461a926 dotnet-ai-ml (#177)
* moved from private to public fork

* add code owner

* accomodate feedback

* update eval to make more natural language

* address eval feedback

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* Update plugins/dotnet-ai/skills/technology-selection/SKILL.md

Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>

* update supporting documentation of adding a new plugin

* update claude-plugin

---------

Co-authored-by: Dan Moseley <danmose@microsoft.com>
Co-authored-by: Luis Quintanilla <46974588+luisquintanilla@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-11 15:06:04 -07:00
Dan Moseley 3923c078b9 Add migrate-dotnet9-to-dotnet10 skill (#180)
* Add migrate-dotnet9-to-dotnet10 skill

Adds a new migration skill that guides upgrading .NET 9 projects to .NET 10,
covering TFM updates, NuGet package upgrades, and source-breaking changes
across the full .NET 10 surface area.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review feedback: fix eval/reference consistency and CODEOWNERS

- Fix ExecuteUpdateAsync rubric: use 'regular lambda/delegate instead of
  expression tree' instead of incorrect 'Func instead of Expression'
- Fix config null binding eval prompt: .NET 9 bound null as empty string,
  not preserving constructor default
- Clarify .NET 10 null binding overwrites constructor default in reference
- Add @ViktorHofer as CODEOWNER for migrate-dotnet9-to-dotnet10

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Suffix reference filenames with -dotnet9to10 to avoid collisions

Rename all reference files under migrate-dotnet9-to-dotnet10/references/
from e.g. efcore.md to efcore-dotnet9to10.md so they don't collide with
reference files from other version migration skills. Update all
references in SKILL.md to match.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address BrennanConroy review: ForwardedHeaders KnownIpNetworks example and IApiEndpointMetadata guidance

- Show KnownIpNetworks property with UseForwardedHeaders context in example
- Add IApiEndpointMetadata explanation for cookie login redirect behavior
- Link to aspnetcore#62883 for details on influencing the behavior

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Shorten skill description to fit 1024-char limit

Reduce description from 1,370 to 1,017 characters by trimming
redundant phrasing while preserving all key search terms.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update CODEOWNERS

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-11 14:06:00 -06:00
Dan Moseley db33912b98 Add migrate-dotnet10-to-dotnet11 skill (#181)
* Add migrate-dotnet10-to-dotnet11 skill (Preview 1 coverage)

Adds a new migration skill that guides upgrading .NET 10 projects to .NET 11,
covering TFM updates, NuGet package upgrades, and breaking changes across
the .NET 11 Preview 1 surface area.

Sources:
- https://learn.microsoft.com/en-us/dotnet/core/compatibility/11
- https://learn.microsoft.com/en-us/ef/core/what-is-new/ef-core-11.0/breaking-changes
- https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/breaking-changes/compiler%20breaking%20changes%20-%20dotnet%2011
- https://learn.microsoft.com/en-us/dotnet/core/whats-new/dotnet-11/overview

Skill coverage:
- C# 15 compiler: Span safe-context, ref readonly InAttribute, nameof(this.),
  with() parsing, dynamic &&/|| with interfaces
- Core libraries: DeflateStream/GZipStream empty payloads, MemoryStream capacity,
  TAR checksum validation, ZipArchive.CreateAsync eager loading,
  Environment.TickCount consistency
- EF Core 11: Cosmos DB sync I/O fully removed
- Cryptography: DSA removed from macOS
- Runtime/JIT: x86-64-v2 minimum, Arm64 LSE requirement on Windows
- SDK: Mono launch target removed for .NET Framework apps

6 reference files loaded based on project type + 7 eval scenarios.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add SYSLIB0063 NamedPipeClientStream breaking change to 10→11 skill

Add documentation for the NamedPipeClientStream constructor obsoletion
(SYSLIB0063) which was merged in dotnet/runtime#120328 for .NET 11 but
not yet documented on learn.microsoft.com. The isConnected parameter
overload is obsoleted, and projects with TreatWarningsAsErrors will
fail to build.

Changes:
- core-libraries.md: Add Obsoleted APIs section with SYSLIB0063
- SKILL.md: Add to description, Step 1 assessment, Step 3 patterns

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Tune skill description and eval prompts for activation

- Add explicit migration framing to skill description to differentiate
  from csharp-scripts skill (SDK was routing to wrong skill)
- Add 'Use the migrate-dotnet10-to-dotnet11 skill' to eval prompts,
  matching real-world usage where users explicitly invoke migration skills

Eval results (3 runs each, explicit skill invocation):

  Haiku:  6/7 activated, best +1.3 (compression/TAR scenario)
  Sonnet: 7/7 activated, best +0.3 (EF Core, TFM update scenarios)

Skill activates reliably now. Quality gains are modest because the
skill covers only Preview 1 breaking changes (training data already
includes MS Learn docs). Expect larger gains as content grows with
later previews.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update plugins/dotnet/skills/migrate-dotnet10-to-dotnet11/references/csharp-compiler.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Split nameof(this.) example into before/after code blocks

Separate the breaking and fixed code into distinct blocks to avoid
ambiguity about which line to use vs remove.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review feedback: fix code examples and global.json guidance

- SKILL.md: Show global.json as a diff edit preserving existing keys
  (rollForward, other settings) instead of replacing the entire file
- csharp-compiler.md: Fix ref readonly lambda example to use a static
  field instead of a captured local (which won't compile in a lambda)
- csharp-compiler.md: Declare missing local variable x in ref readonly
  local function example
- eval.yaml: Fix ref readonly lambda snippet to use a class with a
  static field, matching the reference file fix

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR feedback: add second CODEOWNER, add preview version to EF Core

- Add @ViktorHofer as second owner for migrate-dotnet10-to-dotnet11 and
  migrate-nullable-references paths per CONTRIBUTING.md requirements
- Add Preview 1 annotation to EF Core reference file per reviewer feedback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Suffix reference filenames with -dotnet10to11 to avoid collisions

Rename e.g. efcore.md to efcore-dotnet10to11.md so names won't collide
with reference files from other version migration skills. Update all
paths in SKILL.md to match.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove explicit skill name from eval prompts to reduce overfitting

The eval prompts were explicitly saying 'Use the migrate-dotnet10-to-dotnet11
skill' which biases baseline runs — the agent wastes time searching for a
nonexistent skill, guaranteeing worse performance. Rephrased all 7 prompts
to describe the migration task naturally without naming the skill.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review feedback: fix with/when label, add exit_success assertions

- Rename 'with()' to 'when' in switch-expression-arm parsing label
  (SKILL.md and csharp-compiler reference) to match the actual breaking change
- Add exit_success assertion to all 7 eval scenarios to match repo convention

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move Japanese Calendar breaking change to core-libraries reference

The globalization change was in the runtime-jit reference, which is only
conditionally loaded for older-hardware deployments. Since this affects
all projects regardless of hardware, move it to core-libraries (always
loaded) so it is not missed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify workflow note: allow local repo inspection, forbid only external sources

The previous wording ("Do not search the filesystem") was too broad —
the agent needs to read .csproj, solution, and source files to determine
which breaking changes apply. Reword to explicitly allow local repository
inspection while forbidding web/external sources for breaking change info.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Shorten skill description to fit 1,024-char limit (762 chars)

Remove granular breaking change names (covered in body/references),
drop LOADS REFERENCES (implementation detail), remove unsupported
ASP.NET Core 11 claim (no reference docs shipped), and tighten
DO NOT USE FOR section.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update CODEOWNERS to use @dotnet/compat team instead of individual

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move 'when' parsing change from Step 4 to Step 3

The when switch-expression-arm parsing change is a source/compilation
breaking change, not a runtime behavioral change. It belongs in Step 3
(source-breaking changes) alongside other C# 15 compiler changes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
2026-03-11 14:05:03 -06:00
Dan Moseley e9370fe663 Add migrate-dotnet8-to-dotnet9 skill (#182)
* Add migrate-dotnet8-to-dotnet9 skill with references and eval scenarios

Mirrors the structure and approach of the existing migrate-dotnet9-to-dotnet10 skill.

Covers all .NET 8→9 breaking changes organized by technology area:
- C# 13 compiler (InlineArray records, iterator safe context, collection expressions)
- Core libraries (params span overloads, BinaryFormatter removal, BigInteger, TimeSpan)
- SDK/MSBuild (Terminal Logger, version requirements, .NET 7/Standard warnings)
- ASP.NET Core (HostBuilder validation, forwarded headers, middleware constructors)
- EF Core (pending migrations, explicit transactions, Cosmos DB changes)
- Cryptography (X509Certificate2 SYSLIB0057, SafeEvpPKeyHandle)
- Serialization/Networking (BinaryFormatter, JsonDocument null, HttpClientFactory)
- WinForms/WPF (security analyzers, StatusStrip, PictureBox, XmlNamespaceMaps)
- Containers/Interop (zlib removal, CET support)
- Deployment/Runtime (env var precedence, FP-to-int saturation, MonoVM deprecated)

12 eval scenarios covering all technology areas with assertions and rubrics.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* BinaryFormatter: stop and ask user for replacement strategy

BinaryFormatter migration is a major architectural decision affecting data
format, backward compatibility, and stored data migration. The skill should
present options and let the user decide rather than picking a serializer.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Trim SKILL.md to delegate BinaryFormatter detail to reference

Keep SKILL.md as concise index; full guidance lives in
serialization-networking.md reference.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Trim SKILL.md: delegate fix details to references, remove BinaryFormatter duplicate

- Remove BinaryFormatter duplicate from Step 4 (already covered in Step 3)
- Delegate inline fix details for EF Core, FP saturation, HttpClientFactory to references
- Collapse niche SYSLIB0055/0056 into one-liner pointing to reference
- Shorten params span and String.Trim entries

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve eval scenarios: setup files, task-oriented prompts, expect_activation

- Add setup files (csproj, .cs, Dockerfile, etc.) to 10/12 scenarios so agent
  works with real code instead of pure knowledge questions
- Make prompts task-oriented ('Migrate this app to .NET 9') instead of
  knowledge-oriented ('What breaks?')
- Set expect_activation: false on all scenarios — this is a pure knowledge/
  reference skill with no MCP tools, so activation via SkillInvokedEvent is
  unreliable
- Increase timeouts to 420s to avoid penalizing skilled runs that do more work

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refocus eval scenarios on Opus blind spots

Replace easy scenarios (BinaryFormatter/X509) where Opus always ties with
harder ones targeting areas where the skill adds measurable value:
- Empty env var behavior on Unix (null vs empty string)
- ZipArchiveEntry UTF-8 bit flag mechanism
- FromKeyedServices no-fallback behavior
- Cosmos DB id format change (discriminator no longer embedded)
- Env var precedence reversal with concrete GC/ThreadPool impact

Keep scenarios where skill consistently helps: Cosmos DB id format,
container zlib removal, CI pipeline net7.0 warnings, WinForms PictureBox.

Increase timeouts to 420s to avoid penalizing skilled runs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add forward-chaining guidance to migrate-dotnet8-to-dotnet9 skill

Tell the agent about the migrate-dotnet9-to-dotnet10 skill so it knows
to continue the chain after completing the 8-to-9 migration.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix EF Core eval scenarios to start with 8.0.0 package versions

The eval scenarios claim to test a .NET 8 to .NET 9 migration but the
starting csproj files already reference EF Core 9.0.0 packages. This
reduces test signal since the package upgrade step is already done.
Change all EF Core package versions to 8.0.0 in scenarios 4, 5, and 10.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix InlineArray eval to actually exceed 1 MiB size limit

The rubric expects the model to warn about the InlineArray 1 MiB
runtime size limit, but the example was only 8 KiB (InlineArray(1024)
with byte element). Increase to 1,048,577 bytes so the breaking change
is concretely applicable.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix non-compiling ConfigurePrimaryHttpMessageHandler in eval

The eval used a non-existent overload of ConfigurePrimaryHttpMessageHandler
with a (handler, _) => {} lambda that doesn't return a handler. Replace
with ConfigureHttpMessageHandlerBuilder which correctly casts
PrimaryHandler to HttpClientHandler -- the pattern that actually breaks
when the default switches to SocketsHttpHandler in .NET 9.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix non-compiling HttpClientFactory example in reference doc

The breaking change example used a non-existent overload of
ConfigurePrimaryHttpMessageHandler. Replace with
ConfigureHttpMessageHandlerBuilder which is the actual API that casts
PrimaryHandler and would break when the default changes to
SocketsHttpHandler. Also fix Option 2 to use the same correct API.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove unsafe KnownProxies.Clear() guidance from aspnet-core reference

Clearing KnownProxies and KnownNetworks accepts forwarded headers from
any source, enabling attackers to spoof X-Forwarded-For/Proto/Host
headers. Replace with a warning against this pattern and steer toward
registering only trusted proxy addresses.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove unsafe RedactLoggedHeaders guidance from reference doc

Disabling header redaction globally with RedactLoggedHeaders(_ => false)
logs Authorization tokens, cookies, and other credentials in cleartext.
Replace with guidance to whitelist only specific non-sensitive headers
and add an explicit warning against disabling redaction.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove insecure BinaryFormatter re-enablement option from guidance

Replace the unsupported NuGet package option with a clear security
warning that BinaryFormatter deserialization enables remote code
execution and should not be re-enabled.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add security warning against suppressing WFO1000 analyzer

WFO1000 guards against insecure deserialization of WinForms control
properties. Replace the suppression option with a warning explaining
the security risk and recommend the attribute-based fix instead.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add security warning to CET opt-out guidance

Warn that disabling CET removes hardware-enforced control-flow
integrity (protection against ROP/JOP exploits) and should only
be done when a specific native library is confirmed incompatible.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Label EF Core warning suppressions as temporary workarounds

Add context that suppressing PendingModelChangesWarning risks silent
schema drift and that MigrationsUserTransactionWarning suppression
has transaction safety implications. Both are temporary workarounds.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Prioritize behavioral changes and add global.json rollForward guidance

Mark behavioral changes that can cause runtime exceptions with a
warning indicator and move them to the top of the list so agents
address them first. Add rollForward policy guidance to the
global.json update step to prevent SDK resolution issues.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Split BinaryFormatter code snippet into separate serialize/deserialize blocks

The combined snippet used obj before declaration, which was misleading.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix SYSLIB heading to include full range SYSLIB0054-SYSLIB0057

Previously listed only SYSLIB0054 and SYSLIB0057, omitting 0055 and 0056.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix eval rubric to match setup code: Migrate/MigrateAsync

Setup code uses synchronous Migrate(), not MigrateAsync().

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Use distinct variable names in X509CertificateLoader examples

Duplicate 'var cert' declarations would cause compilation errors if pasted as-is.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove misleading 'backported from .NET 8' from ForwardedHeaders section

The claim is confusing in an 8-to-9 migration guide context.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify GetXmlNamespaceMaps InvalidCastException explanation

Previous wording was logically inconsistent about the direction of the type change.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update plugins/dotnet/skills/migrate-dotnet8-to-dotnet9/references/efcore.md

Co-authored-by: Andriy Svyryd <AndriySvyryd@users.noreply.github.com>

* Fix ReadOnlySpan<char> String.Trim example and eval scenario

The code example incorrectly used ReadOnlySpan<char> as a static field,
which is impossible (ref struct). The eval scenario used a local
ReadOnlySpan<char> variable which actually compiles fine on .NET 9 GA,
so it didn't demonstrate the breaking change. Updated both to correctly
show the RC2-to-GA overload removal issue.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add -dotnet8to9 suffix to reference filenames to avoid cross-skill collisions

Other version migration skills (e.g., 9-to-10) have similarly named
reference files. Adding the suffix disambiguates them.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Shorten skill description to fit 1024-char limit

Remove LOADS REFERENCES section (implementation detail already covered by
the reference loading table in the body) and tighten wording. All USE FOR
activation keywords and DO NOT USE FOR rejection keywords preserved.
Description is now 1006 characters.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review feedback

- CODEOWNERS: Replace @ViktorHofer with @jeffschwMSFT for migrate-dotnet8-to-dotnet9
- SKILL.md: Shorten description from 1,400 to 671 chars (max 1,024)
- sdk-msbuild-dotnet8to9.md: Clarify VS 17.11 SDK targeting phrasing
- core-libraries-dotnet8to9.md: Fix cross-reference to serialization-networking-dotnet8to9.md
- serialization-networking-dotnet8to9.md: Replace 'whitelist' with 'allowlist'
- winforms-wpf-dotnet8to9.md: Rename heading to cover both Get/SetXmlNamespaceMaps
- eval.yaml: Use ReadOnlySpan<char> to properly demonstrate String.Trim RC2 breakage

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* CODEOWNERS: Use solo @danmoseley (consistent with migrate-nullable-references)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update CODEOWNERS to use @dotnet/compat team instead of individual

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review feedback: fix factual errors in references and eval

- Fix URL with %20 spaces to use hyphens (csharp-compiler ref)
- Fix DOTNET_GCConcurrent -> DOTNET_gcConcurrent casing (eval.yaml)
- Remove invalid [StructLayout] combined with [InlineArray] (eval.yaml)
- Move JSON comment outside code fence (deployment-runtime ref)
- Remove confusing preview-era sentence (winforms-wpf ref)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Revert URL change: %20 encoding is correct for this MS Learn page

The original URL with percent-encoded spaces is the actual working URL;
the hyphenated version returns 404.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve EF Core reference doc to help failing eval scenarios

- Promote HasIndex from Low to Medium Impact with crash detail and
  removal guidance (Scenario 5 missed this causing quality regression)
- Expand id format change section with data migration implications
  and HasRootDiscriminatorInJsonId mitigation (Scenario 5 rubric)
- Add concrete DateTime.UtcNow in HasData before/after example
  (Scenario 4 missed connecting HasData to pending changes exception)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add explicit HasData search action for pending model changes

The agent reads the reference doc but doesn't connect DateTime.UtcNow
in HasData to the pending changes exception. Make the SKILL.md workflow
step prescriptive: search for non-deterministic values and replace them.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Andriy Svyryd <AndriySvyryd@users.noreply.github.com>
2026-03-11 14:03:42 -06:00
Viktor Hofer c735d84f9d Improve CODEOWNERS validation: require sufficient owners and enable as required check (#314)
* Improve CODEOWNERS validation workflow

- Remove path filters from pull_request trigger so it can be a required check
- Add owner sufficiency validation: each skill/test folder must have either
  2+ individual owners or 1+ team in CODEOWNERS
- Update issue creation to report both missing entries and insufficient owners
- Update failure step to trigger on either validation failure

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update CODEOWNERS to add additional code owners

Added @agocke and @hoyosjs as code owners for migrate-nullable-references and dotnet-trace-collect skills.

* Update CODEOWNERS for dotnet-trace-collect

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-10 21:16:41 +01:00
Gerald Versluis ebe71e2f06 Add dotnet-maui plugin with dotnet-maui-doctor skill (#199)
* Add dotnet-maui-doctor skill and refs

Add a new .agents/skills/dotnet-maui-doctor skill bundle. Includes SKILL.md describing an autonomous workflow to detect and remediate .NET MAUI environment issues and platform-specific reference docs for installation commands, platform requirements, troubleshooting, Microsoft OpenJDK guidance, and a WorkloadDependencies discovery guide that pulls authoritative versions from NuGet. Documents validation/remediation steps for .NET SDK, workloads, JDK, Android SDK, Xcode, and Windows SDK (macOS/Windows/Linux) and includes a temporary recommendation to prefer Microsoft OpenJDK (JDK 21) until manifests are updated.

* MAUI doesn't quite yet support dotnet run

* Add dotnet-maui plugin and dotnet-maui-doctor skill

Introduce the dotnet-maui plugin and move the dotnet-maui-doctor skill under plugins/ layout. Update marketplace, CODEOWNERS, and README accordingly.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add comprehensive eval scenarios for dotnet-maui-doctor

10 scenarios covering: macOS/Linux/Windows setup, JDK vendor enforcement,
workload update/repair guardrails, dynamic version discovery, JAVA_HOME
misconception, Android SDK diagnosis, out-of-scope decline, and stale
workload remediation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refine eval scenarios: remove weak scenarios, fix overfitting

Remove 'Resist hardcoding' (penalizes skill — baseline gives more useful
direct answer) and 'Decline runtime bug' (skill makes agent refuse to
help). Rework Android SDK scenario to test CI-oriented package discovery
where baseline lacks knowledge. Replace vocabulary-level NuGet/API
assertions with outcome-focused rubric items across all scenarios.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove hardcoded JDK version workarounds in favor of dynamic discovery

Replace temporary JDK 21 workaround notes with guidance to use the
version from WorkloadDependencies.json. Replace hardcoded JDK paths
in troubleshooting.md with {VERSION} placeholders.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve eval scenarios: fix JAVA_HOME timeout, macOS tie, reduce overfitting

- JAVA_HOME: rewrite prompt to request conceptual answer (prevents tool timeout)
- macOS Xcode: add installation source guidance, remove equal-penalty assertion
- Remove irrelevant workload update/repair assertions from 3 off-topic scenarios
- Keep workload assertions in 5 scenarios where workload management is the topic

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Reframe JAVA_HOME scenario as prevent-harmful-action pattern

Rewrite prompt from conceptual yes/no question (which the agent answered
from wrong general knowledge without activating the skill) to a scenario
where the user is about to apply incorrect Stack Overflow advice. This
mirrors the successful workload guardrail pattern.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Reduce overfitting: rephrase assertions and rubric to be outcome-focused

- Replace literal '--version' assertions with broader 'version|pin' pattern
- Rephrase Xcode rubric from skill-specific source to version control risk
- Rephrase version discovery rubric from 'NuGet API' to outcome-focused
- Rephrase workload install rubric from '--version flag' to 'pinned version'

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Inline critical JAVA_HOME auto-detection guidance into SKILL.md

The JAVA_HOME eval scenario scored poorly because the agent couldn't read
the reference file (references/microsoft-openjdk.md) and fell back on
general knowledge, which incorrectly says JAVA_HOME must be set.

Changes:
- Task 5: Add inline JAVA_HOME guidance with decision table showing that
  JAVA_HOME is NOT required and MAUI auto-detects JDK installations
- Common Pitfalls: Add 'Unnecessary JAVA_HOME' entry with unset commands

This ensures the agent knows JAVA_HOME is unnecessary even when reference
files can't be loaded. File stays at 210 lines (limit: 500).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Inline JAVA_HOME auto-detection knowledge into SKILL.md

Add JAVA_HOME guidance directly to Task 5, Task 9, and Common Pitfalls
so the agent knows JAVA_HOME is not required even when reference files
can't be read. Based on Redth's original microsoft-openjdk.md reference.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address code review feedback from Copilot

- Fix cmd.exe syntax in installation-commands.md (use PowerShell $env:)
- Replace hardcoded simulator device/runtime with placeholders
- Add System.IO.Compression.FileSystem assembly load for PS 5.1 compat
- Clarify workload reinstall example is macOS-specific (omit ios on Linux)
- Replace hardcoded android-35 with $API_LEVEL placeholder

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address jonathanpeppers review feedback

- Add Apple Developer login/2FA note for Xcode downloads
- Fix Windows SDK detection: extract KitsRoot10 and version subkeys
  instead of dumping full registry (was outputting noise)
- Replace manual NuGet API approach with dotnet workload search version
  CLI command for discovering workload versions
- Reframe JAVA_HOME guidance: report as anomaly rather than prescribing
  unset/set commands (per jonathanpeppers recommendation)
- Use $env:ProgramFiles instead of hardcoded C:\Program Files paths
  in PowerShell commands
- Update SKILL.md to match: softer JAVA_HOME guidance, improved
  Windows SDK detection command

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address Redth review feedback

- Remove Windows SDK detection commands — installed automatically
  via MAUI workload/VS Installer (per Redth recommendation)
- Use dotnet workload search version --format json --take 1 for
  workload version discovery instead of NuGet search API (per both
  Redth and jonathanpeppers)
- Update workload-dependencies-discovery.md Step 2 to match
- Expand Android SDK detection with known filesystem paths
  instead of relying solely on environment variables

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Align eval rubric with reviewer feedback to reduce overfitting

Replace technique-specific rubric items with outcome-focused criteria:
- Replace PowerShell API query check with dotnet CLI discovery check
- Replace manifest extraction check with workload-version-based discovery
- Replace prescriptive version discovery with CLI/docs verification
- Convert workload update/repair regex assertions to rubric criteria
- Remove Invoke-RestMethod assertion (no longer using API queries)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Align JAVA_HOME guidance with reviewer consensus, add Xcode download expectations

- Consistently use ⚠️ anomaly approach for non-Microsoft JAVA_HOME across
  microsoft-openjdk.md and troubleshooting.md (matching SKILL.md)
- Remove contradictory Note in microsoft-openjdk.md that conflicted with table
- Reframe unset commands as user's choice, not automatic action
- Add Xcode download size (~12GB) and time expectations per Redth's feedback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update plugins/dotnet-maui/skills/dotnet-maui-doctor/references/workload-dependencies-discovery.md

Co-authored-by: Jonathan Peppers <jonathan.peppers@gmail.com>

* Update JDK example to version 21 per jonathanpeppers feedback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: redth <jondick@gmail.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Jonathan Peppers <jonathan.peppers@gmail.com>
2026-03-09 13:34:19 -07:00
Dan Moseley 042a9d2b2c Reorganize plugins into domain-specific groupings (#274)
* Reorganize plugins per agreed structure (#271)

Split the dotnet plugin into domain-specific plugins per discussion
in #271:

- dotnet: narrowed to common everyday C#/.NET coding tasks
- dotnet-diag: perf investigations, debugging, incident analysis
- dotnet-data: data access and Entity Framework
- dotnet-aspnet, dotnet-wpf, dotnet-winforms, dotnet-maui: scaffolded
  empty to convey intent for future framework-specific skills

Moved skills, tests, and CODEOWNERS entries accordingly.
No file content was changed; all skill/test moves are pure renames.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve dotnet-diag and dotnet-winforms descriptions

- dotnet-diag: add '.NET' qualifier to clarify scope
- dotnet-winforms: use official 'Windows Forms (WinForms)' name

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add .NET qualifier to dotnet-data description

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove empty plugins; list them in CONTRIBUTING.md as future options

Remove the four empty placeholder plugins (dotnet-aspnet, dotnet-wpf,
dotnet-winforms, dotnet-maui) that had only plugin.json and no skills.

Add a 'Plugin organization' section to CONTRIBUTING.md that describes the
domain-specific plugin groupings introduced in this PR and lists the four
removed plugin names as reserved candidates for future contributions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Create dotnet-upgrade plugin with migration/upgrade skills

Move migrate-nullable-references, thread-abort-migration, and
dotnet-aot-compat from dotnet to the new dotnet-upgrade plugin.

Update CODEOWNERS paths (same owners), CONTRIBUTING.md plugin table,
and fix the thread-abort-migration SKILL.md link in CONTRIBUTING.md.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-06 21:01:52 -08:00
Larry Ewing f7abee2099 Add nuget-trusted-publishing skill (#210)
* Add nuget-trusted-publishing skill

Knowledge-driven skill for setting up NuGet trusted publishing (OIDC)
on GitHub Actions repos, replacing long-lived API keys with short-lived tokens.

Replaces #34 which could not be reopened after history rewrite.

* Address review: move to plugins/tests layout, fix phase sequencing, add CODEOWNERS

- Move skill from src/dotnet/skills/ to plugins/dotnet/skills/nuget-trusted-publishing/
- Move eval from src/dotnet/tests/ to tests/dotnet/nuget-trusted-publishing/
- Fix Phase 3/4 sequencing conflict: clarify that drafting the workflow is OK
  before policy confirmation, but publishing/removing secrets should wait
- Add CODEOWNERS entry for nuget-trusted-publishing

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-05 09:16:27 +01:00
Dan Moseley 3c3c7e051d Add CODEOWNERS entries for dotnet-aot-compat (#211) 2026-03-04 14:42:24 -08:00
Brian Robbins 2a9a48b982 Add dotnet-trace-collect skill for .NET performance diagnostics (#124)
* Add dotnet-trace-collect skill for .NET performance diagnostics

Add a new skill that guides developers through capturing diagnostic
artifacts for production .NET performance issues. Covers tool selection,
data collection commands, and analysis recommendations across Windows,
Linux, containers, and Kubernetes for both modern .NET and .NET Framework.

Includes eval.yaml with 12 test scenarios covering high CPU, memory leaks,
excessive GC, hangs, slow requests, native call stacks, Windows containers,
long-running repros, and environment-specific tool trade-offs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Remove overly broad eval assertion.

* Add workload context check to Step 1

Ask whether the agent is running in the context of the workload.
If so, run diagnostic commands directly; otherwise provide guidance.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Prefer console tools over dotnet-monitor in K8s when in workload context

When running in the context of the workload with console access,
prefer dotnet-trace, dotnet-trace collect-linux, and dotnet-dump
over dotnet-monitor to avoid authentication setup. Fall back to
dotnet-monitor when console access is not available or it is
already deployed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update tool reference: prefer console tools over dotnet-monitor in workload context

Update dotnet-counters container comment and dotnet-monitor trade-offs
to note that console tools are preferred when running in the workload
context with console access.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Delegate dump collection to dump-collect skill

This skill focuses on trace collection. All dump collection guidance
and execution is now delegated to the dump-collect skill. References
to dotnet-dump, procdump, createdump, gcore, and Task Manager for
dump collection are replaced with delegation to dump-collect.

Dump analysis rows removed from Step 4 analysis table since dump
artifacts are handled by the other skill.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove dotnet-dump section and dump references from tool reference

The entire dotnet-dump section is removed since dump collection is
delegated to the dump-collect skill. Also removed dump/gcdump
endpoints from dotnet-monitor REST API examples (replaced gcdump
with GC trace endpoint), and cleaned up remaining procdump/dotnet-dump
references in PerfView and dotnet-monitor trade-offs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update hangs guidance: start with a trace before a dump

Reorder the hangs workflow to capture a trace first. A trace can
reveal livelocks, thread starvation, or partial forward progress.
Only escalate to a dump if the trace does not explain the hang,
which indicates a potential true deadlock.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix dotnet-trace collect profile: use dotnet-sampled-thread-time

cpu-sampling is only available for collect-linux. Replace with
dotnet-sampled-thread-time in the dotnet-trace collect example.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Rename dotnet-trace section header to dotnet-trace collect

Clarify the section heading to distinguish dotnet-trace collect from
dotnet-trace collect-linux, which has its own dedicated section.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Split tool-compatibility.md into per-tool reference files

Split the monolithic tool-compatibility.md (603 lines) into 6
individual reference files, one per tool:
- dotnet-counters.md (47 lines)
- dotnet-trace-collect.md (66 lines)
- dotnet-trace-collect-linux.md (76 lines)
- dotnet-monitor.md (93 lines)
- perfview.md (125 lines)
- perfcollect.md (177 lines)

This reduces context usage since the skill only needs to load 1-2
tool references per scenario (50-250 lines) instead of all 603 lines.
The tool selection logic remains entirely in SKILL.md; references are
only needed after the tool is chosen.

Updated SKILL.md to replace 3 generic tool-compatibility.md links
with an environment-to-reference-file lookup table. Follows the same
pattern used by the dump-collect skill.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add collect-linux limitations: symbol resolution and cross-namespace

Document two additional limitations for dotnet-trace collect-linux:
- Native symbols must be on disk during capture for resolution
- Cannot trace cross-namespace processes

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add aka.ms direct download links for dotnet-trace

Add curl/wget download option using aka.ms links for Linux x64,
Arm64, musl x64, and Windows x64. This avoids the need for a
.NET SDK, which is useful in container environments.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove dotnet-trace report from analysis tools table

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update evals to cover recent skill changes

Updated existing scenarios:
- Hang diagnosis: expect trace-first (livelock/starvation check)
  before escalating to dump for true deadlocks
- Memory leak (Linux + .NET Framework): expect delegation to
  dump-collect skill instead of direct dotnet-dump commands

Added new scenarios:
- K8s with console access: prefer console tools over dotnet-monitor
- Container without SDK: aka.ms direct download for dotnet-trace
- collect-linux cross-namespace limitation awareness

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove dotnet-counters from skill

dotnet-counters was causing confusion where the skill would recommend
dotnet-counters but download dotnet-trace via aka.ms links. Since traces
provide richer diagnostic data, remove all dotnet-counters references
and focus the skill on trace collection.

- Remove dotnet-counters.md reference file
- Remove dotnet-counters from lookup table, container tools list,
  live monitoring section, and analysis table in SKILL.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update K8s eval to prefer dotnet-trace over dotnet-monitor

The skill recommends console-based tools (dotnet-trace) as the preferred
approach when the user has console access to a container. Update the
High CPU in Kubernetes scenario to match: expect dotnet-trace as
primary, dotnet-monitor as alternative for no-console-access cases.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add missing context to eval prompts to prevent user prompting

Several eval prompts were missing required inputs (deployment context,
admin privileges, symptom, .NET version) that the skill needs to select
the right tool. This caused the validator to hang waiting for clarifying
questions that never come in eval mode.

Changes:
- Add 'running directly on a VM/server' to non-container scenarios
- Add symptom to .NET 10 native stacks and container installation prompts
- Add .NET version and admin access to slow requests prompt
- Add admin access to PerfView triggers prompt

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Strengthen dump-collect delegation language to 'invoke' not 'delegate'

The skill was using passive 'delegate to dump-collect skill' phrasing
which LLMs may interpret as merely mentioning the skill rather than
actually invoking it. Changed all references to use 'invoke the
dump-collect skill' with explicit 'do not provide dump commands directly'
in key sections. Updated eval rubrics to match.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove mention of dotnet-monitor for Windows Container CPU eval

The result should be completely focused on PerfView usage and not
dotnet-monitor.

* Clarify StopOn triggers must fire on interesting event, not recovery

Strengthened the circular buffer + StopOn guidance to explain WHY
triggering on recovery is wrong: the circular buffer continuously
overwrites old data, so the interesting behavior may be lost by the
time collection stops. Added 'Critical' callout and 'Never trigger
on recovery' in the pitfalls table.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Explain why console tools are preferred over dotnet-monitor

When recommending console-based tools over dotnet-monitor in containers,
explicitly state the reason: dotnet-monitor requires authentication
configuration and sidecar deployment, making console tools easier to
set up when you have direct access.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add kernel requirement to cross-namespace eval rubric

The judge was flagging the kernel >= 6.4 with CONFIG_USER_EVENTS=y
detail as oddly specific, but it is accurate per the collect-linux
reference documentation. Add rubric item so the judge recognizes
this as correct.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Scope dump-collect to modern .NET only, provide direct commands for .NET Framework

The dump-collect skill only supports modern .NET (.NET Core 3.0+).
Updated all .NET Framework references to provide dump commands directly
(procdump -ma, Task Manager) instead of invoking dump-collect. Updated
the Memory dumps header, decision matrix, .NET Framework sections, and
the .NET Framework memory leak eval to match.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove .NET 10 collect-linux cross-namespace eval scenario

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove auth setup rubric from K8s console access eval

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move skill to standard directory structure and update CODEOWNERS

Moved skill from src/dotnet/skills/ to plugins/dotnet/skills/ and
tests from src/dotnet/tests/ to tests/dotnet/ to match the existing
directory structure. Updated CODEOWNERS to add the new skill with
@brianrob as owner.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
2026-03-03 08:15:32 -08:00
Aaron R Robinson dc85d453c4 Add missing CODEOWNERS entries for new skills (#161)
* Add missing CODEOWNERS entries for new skills

Add folder-level CODEOWNERS entries for:
- android-tombstone-symbolication (@jeffschwMSFT)
- clr-activation-debugging (@marklio)
- microbenchmarking (@caaavik-msft)

Fixes #159

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Apply suggestion from @AaronRobinsonMSFT

* Apply suggestion from @AaronRobinsonMSFT

* Apply suggestion from @AaronRobinsonMSFT

* Apply suggestion from @AaronRobinsonMSFT

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-02 13:33:20 -08:00
Dan Moseley 63c6ee1eec Nullable reference migration skill (#39)
* Add nullable-reference-migration skill

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance: annotate based on design intent, not warnings

Annotations should reflect the intended nullability contract of each
member. Deciding intent first and then fixing warnings avoids the
common mistake of over-annotating with ? or scattering ! to silence
the compiler.

Learned from dotnet/runtime nullable annotation guidelines.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add pitfall: ?. (null-conditional) changes behavior unlike ? and !

During nullable migration it is tempting to change obj.Method() to
obj?.Method() to silence a warning. Unlike ? on a type or ! on an
expression, ?. changes the generated IL and silently skips the call
when the value is null, which can introduce subtle regressions.

Learned from dotnet/runtime PR #57418, #65262, #67198 review comments.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add pitfall: adding ? to value types changes the actual type

For reference types, ? is a metadata-only annotation. For value types
(enums, structs, int, etc.), ? wraps the type in Nullable<T>, which
changes the method signature and binary layout. This was caught as a
breaking change in dotnet/runtime PR #65262 when LogLevel was
accidentally made nullable.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance: Debug.Assert as compiler hint and reducing ! usage

Debug.Assert(x != null) informs the nullable flow analyzer just like
an if-check, eliminating the need for ! operators in the subsequent
scope. Also adds guidance that if every call site of an internal
method needs !, the parameter should probably be nullable instead.

Learned from dotnet/runtime PR #67198 and PR #67198 review feedback.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Enhance CS8618 guidance with [MemberNotNull] for helper methods

When a helper method called from the constructor initializes fields,
[MemberNotNull(nameof(field))] tells the compiler those fields are
guaranteed non-null after the call, eliminating CS8618 warnings
without resorting to ! or making fields nullable.

Learned from dotnet/runtime PR #67198 where this pattern eliminated
many suppression operators.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance for struct default fields and post-Dispose state

Struct reference-type fields are null in default(T). Annotate based
on whether default is valid usage: nullable if yes, non-nullable if
not. Also adds guidance that post-Dispose nullability should not
weaken annotations, since post-Dispose use is a contract violation.

Learned from dotnet/runtime PR #528 (struct fields), nullability.md
(InterfaceMapping vs CancellationToken), and PR #65262 (Dispose).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance: prioritize public API annotations over internal code

Public and protected APIs define the contract consumers depend on
and should be annotated first and most carefully. Internal code can
tolerate ! more liberally since it does not affect callers.

Learned from dotnet/runtime PR #67198 review feedback.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add pitfall: do not remove ArgumentNullException checks

Non-nullable parameters still need runtime null validation because
callers may not have NRT enabled (other languages, older C#,
suppressed warnings). Removing existing checks during migration
can introduce regressions for those callers.

Learned from dotnet/runtime nullability.md guidelines.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Enhance Try method annotation patterns with specific recipes

Clarifies the distinction between generic and non-generic Try method
out parameters: use [NotNullWhen(true)] out T? for non-generic, and
[MaybeNullWhen(false)] out T for generic. Also notes that
Equals(object?) overrides should use [NotNullWhen(true)].

Learned from dotnet/runtime nullability.md DO guidelines.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance for override covariance and IEquatable<T?>

Override return types can be stricter (non-nullable) than the base
even if the base returns T?. Also adds that reference types should
implement IEquatable<T?> and IComparable<T?> since callers commonly
pass null to Equals.

Learned from dotnet/runtime PR #67198 and nullability.md guidelines.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add three-pass code review checklist for nullable changes

Nullable PRs need broader review than a typical diff: (1) verify no
behavior/IL changes, (2) review explicit annotation changes for
correct contracts, (3) scan unchanged APIs whose implicit nullability
changed when the nullable context was enabled.

Learned from dotnet/runtime nullability.md Code Review Guidance.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add link to dotnet/runtime nullable annotation guidelines

This is the authoritative internal document used when annotating the
.NET libraries and contains detailed guidance on gray areas, virtual
methods, struct defaults, and attribute usage.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Strengthen null validation pitfall: NRTs are compile-time only

Nullable annotations do not prevent null at runtime. Callers using
older C#, other .NET languages, reflection, dynamic, or the !
operator can still pass null. Emphasizes that runtime validation on
public APIs remains essential for correctness and security.

Learned from community blog posts (Maarten Balliauw, JetBrains)
and dotnet/runtime nullability.md.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Define NRT abbreviation at first use in body text

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Note that [MaybeNull] should be rare — prefer T? when possible

The .NET runtime codebase has only ~7 uses of [MaybeNull]. In most cases
T? is a better choice. Reserve [MaybeNull] for edge cases like
AsyncLocal<T>.Value where T? would incorrectly allow setting to null
when T is non-nullable.

Source: dotnet/runtime nullability guidelines

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance to use [NotNullWhen(true)] on Equals overrides

When Equals(object? obj) returns true, the argument is guaranteed
non-null. Annotating with [NotNullWhen(true)] lets callers skip
redundant null checks after equality tests.

Source: dotnet/runtime nullability guidelines

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance for widely-overridden virtual return types

For virtual/abstract methods with many overrides, check whether
existing overrides return null in practice. The .NET runtime annotated
Object.ToString() as string? (overrides commonly return null) but
Exception.Message as string (null overrides vanishingly rare).
When in doubt, prefer T?.

Source: dotnet/runtime nullability guidelines (ToString case study)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Prefer multiple [MemberNotNull] attributes over params overload

The params string[] overload of MemberNotNull is not CLS-compliant
and may require #pragma warning disable. Use separate attributes
for each field instead.

Source: dotnet/runtime nullability guidelines

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Warn that compiler does not flag misapplied nullable attributes

Attributes like [DisallowNull] on a non-nullable parameter or
[MaybeNull] on a by-value input parameter are silently ignored.
Even Roslyn team members get tripped up by this.

Source: dotnet/roslyn#36073 (jcouv, RikkiGibson)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Warn about false safety from nullable-oblivious libraries

Unannotated dependencies produce no nullable warnings at all,
giving a false sense of safety. Return values from oblivious APIs
should be treated as potentially null.

Source: dotnet/roslyn#44063 (jcouv), dotnet/roslyn#38941

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify Try method annotation: generic vs non-generic out params

Non-generic out params: declare nullable with [NotNullWhen(true)].
Generic out params: keep non-nullable with [MaybeNullWhen(false)].
Using T? on generic params would change value-type signatures to
Nullable<T>.

Source: dotnet/runtime nullability guidelines

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance for unconstrained generics and LINQ null filtering

For generic methods returning default on unconstrained T, use
[return: MaybeNull] T instead of T? to avoid changing value-type
signatures to Nullable<T>.

LINQ Where(x => x != null) does not narrow T? to T. Use a
WhereNotNull() helper (as Roslyn itself does) or OfType<T>().

Source: dotnet/roslyn#30953 (jcouv, roji), dotnet/roslyn#39586 (sharwell)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add pitfall: var is always considered nullable by the compiler

The compiler treats var as nullable regardless of the assigned
expression — flow analysis determines the actual null-state. This
can surprise developers who expect var to inherit non-nullability
from the right-hand side.

Learned from Maarten Balliauw's nullable migration blog series.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add strategy guidance: start at the center, work outward

Annotating core domain models, DTOs, and shared utilities first
eliminates cascading warnings across the codebase and gives the
biggest return on effort. Applies to all three rollout strategies.

Learned from Maarten Balliauw's JetBrains 2025 talk and blog series.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add dedicated EF Core section with schema migration warning

EF Core infers column nullability from NRT annotations. Enabling
NRTs can silently generate migrations that make previously nullable
columns required, risking data loss. Consolidates all EF Core
guidance (navigation properties, schema impact, migration review)
into a dedicated section and removes the scattered EF references.

Learned from Maarten Balliauw's JetBrains 2025 talk, Damir Arh's
blog, and EF Core documentation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* EF Core: warn that #nullable disable warnings is insufficient for entity files

#nullable disable warnings only suppresses compiler diagnostics but leaves
the annotation context active. EF Core reads annotations via reflection,
so properties without ? are still treated as required, potentially altering
database schema. Use #nullable disable to fully opt entity files out.

Source: dotnet/efcore#33245 (confirmed by EF team member roji).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* EF Core: add DbSet<T> initialization guidance

DbSet properties should remain non-nullable since EF Core always
initializes them. EF Core 7.0+ suppresses CS8618 automatically;
older versions can use = null! or expression body => Set<T>().

Source: official EF Core NRT docs page.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* EF Core: expand navigation property guidance with three approaches

Replace single-sentence guidance with the three patterns from the
official EF Core NRT docs: (a) non-nullable with null!, (b) nullable
when code checks load state, (c) non-nullable wrapping nullable
backing field that throws. Also note collection navigations must
always be non-nullable (empty, never null).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* EF Core: add LINQ query guidance for optional navigations

EF Core translates LINQ to SQL so null navigations don't throw at
runtime, but the compiler still warns. Use ! in Where/Include
expressions to suppress false positives. From official EF Core docs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* ASP.NET Core: MVC treats non-nullable properties as [Required]

When NRTs are enabled, ASP.NET Core MVC/Web API implicitly adds
[Required(AllowEmptyStrings = true)] to every non-nullable reference
type property in DTOs and view models. This can cause previously
accepted requests to return 400 Bad Request. Controllable via
SuppressImplicitRequiredAttributeForNonNullableReferenceTypes.

Source: official ASP.NET Core model validation docs, aspnetcore#22656.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* ASP.NET Core: System.Text.Json RespectNullableAnnotations and limits

STJ (.NET 9+) can enforce NRT annotations at serialization time via
RespectNullableAnnotations, but cannot enforce collection element
nullability (List<string> vs List<string?> are indistinguishable in
IL), top-level types, or generic properties. Document the opt-in
and its limitations.

Source: official STJ nullable annotations docs, aspnetcore#57234
(confirmed by eiriktsarpalis and terrajobst).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* ASP.NET Core: warn about #nullable disable warnings on model files

Same pitfall as EF Core: #nullable disable warnings only suppresses
compiler diagnostics but leaves annotations active. MVC reads them
via reflection to infer [Required], so model files not yet migrated
must use #nullable disable to fully opt out.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Expand rollout strategy guidance and add suppression analysis use case

Add 'analyzing existing suppressions' to When to Use section.
Expand the start-at-center strategy with guidance to work outward
through layers and keep PRs scoped per project or layer.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add helper extension methods section with WhereNotNull

Add a Helper Extension Methods section with WhereNotNull for both
reference and value types. This is the pattern used by the Roslyn
compiler codebase to filter nulls with correct type narrowing, which
.Where(x => x != null) cannot provide. Update the inline reference
in Step 3 to link to the new section.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add incremental build checkpoints to NRT migration workflow

Add explicit build checkpoint instructions after Steps 2-6 so the
AI builds and checks warning counts after each phase rather than
attempting all fixes blind.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add commit strategy guidance to NRT migration workflow

Tell the AI when to commit during the migration: at each logical
boundary (enable, dereference fixes, annotations, attributes,
cleanup) to keep diffs reviewable and prevent lost work.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add 'when to ask the user' guidance for annotation decisions

Tell the AI to ask the user before changing public API contracts,
deciding nullable vs required for ambiguous properties, or choosing
between null checks and suppressions when design intent is unclear.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add inline anti-pattern callouts with warning markers

Add prominent ❌ and ⚠️ callouts inline in Steps 3 and 4 where
dangerous mistakes are most likely: using ?. to silence warnings,
sprinkling !, adding ? to value types, letting warnings drive
annotations, and removing existing null argument validation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add decision flowchart for resolving nullable warnings

Add a structured decision tree in Step 3 that guides the AI through
each warning: is null valid by design? Can you prove non-null? This
prevents defaulting to ! or over-annotating with ?.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add scope-based prioritization guidance to Step 3

Tell the AI to work in dependency order (core models first, then
consumers) and prioritize public/protected members within each file
to minimize cascading warnings.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add verify-before-claiming guidance to validation step

Tell the AI to verify annotations match design intent, check for
accidental ?. operators, confirm no removed null checks, and audit
! usage before reporting the migration as complete.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add conditional behavior guidance based on project type

Tell the AI to tailor its approach based on whether the project is
a library (public API contracts first), application (boundaries
first), or test project (more liberal use of !).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Flag public API methods missing runtime null validation

Tell the AI to check for missing ArgumentNullException guards on
non-nullable public/protected parameters during annotation. Without
runtime checks, null passed at runtime causes NRE instead of ANE.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add Purpose paragraph to match recommended SKILL.md structure

Add a one-paragraph Purpose description under the top-level heading,
describing the outcome of using this skill.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Couple notes

* Add missing reference links to More Info section

Add links to Nullable reference types overview, C# language reference
page, and null-forgiving operator reference. These are foundational
docs referenced throughout the skill.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add breaking changes section for library NRT annotations

Warn that incorrect NRT annotations are source-breaking changes for
library consumers. Covers implicit non-nullability, parameters that
should be nullable, return types, and versioning guidance.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add guidance: methods tolerating null should accept nullable params

If a method handles null gracefully (returns null, returns default,
returns a failure result) rather than throwing, the parameter should
be T?, not T. Based on BCL conventions and NodaTime design discussions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Make build/test references build-system agnostic

Not all repos use dotnet build/test directly — some use build scripts,
msbuild, cake, nuke, etc. Add build/test command as optional inputs,
update Step 1 to detect the build system, and replace hardcoded
'dotnet build'/'dotnet test' with generic 'build'/'test' in
checkpoints and validation checklist.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove cake/nuke from build script examples

These are uncommon enough to not warrant explicit mention. Keep the
list focused on what an agent would actually encounter.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Recommend WarningsAsErrors in project file instead of CLI flag

<WarningsAsErrors>nullable</WarningsAsErrors> in the .csproj or
Directory.Build.props permanently prevents nullable regressions,
which is better than relying on a CLI flag that CI might miss.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Track and document breaking changes for public libraries

When annotating a public library, the AI should create a
nullable-breaking-changes.md listing all public API changes that
could affect consumers (return types narrowed/widened, parameters
changed, value type nullability, new guards). This file serves as
a review artifact and basis for release notes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add trigger phrases to skill description for discovery

Add CS8602, CS8618, CS86xx, #nullable enable, annotating APIs, and
null-forgiving operator keywords so agents discover this skill for
a wider range of nullable-related user requests.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move framework-specific sections to references/ for progressive disclosure

Move EF Core, ASP.NET Core, breaking changes, and helper extension
method content into references/ files. SKILL.md retains one-line
summaries with links so the agent loads detailed content only when
relevant. Reduces SKILL.md from 218 to 194 lines.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add NRT readiness scanner script

Add scripts/Scan-NullableReadiness.ps1, a PowerShell Core script that
scans a project or solution and reports NRT migration status: project
settings (Nullable, LangVersion, TargetFramework, WarningsAsErrors)
and source-level counts (#nullable directives, ! operators, #pragma
CS86xx suppressions). Supports -Path, -Json, and -Recurse parameters.

Update SKILL.md Steps 1 and 6 to reference the script as an optional
automation step.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix strict mode .Count errors in Scan-NullableReadiness.ps1

Wrap pipeline results in @() before accessing .Count to avoid
'property Count cannot be found' errors under Set-StrictMode -Version Latest
when a pipeline returns a single object instead of an array.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add automated tests for Scan-NullableReadiness.ps1

Test script runs the scanner against three fixture projects:
- nrt-disabled: no <Nullable>, has ! operators and #pragma suppressions
- nrt-enabled: <Nullable>enable, clean code
- nrt-partial: <Nullable>enable but files with #nullable disable and !

Validates JSON output matches expected NRT readiness state (19 assertions).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Recommend clean builds for validation checkpoints

Incremental builds only recompile changed files, hiding nullable
warnings in untouched files. All build checkpoints should use
clean builds (e.g., --no-incremental) to surface all warnings.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move nullable-reference-migration to src/dotnet/ layout

Align with upstream repo restructuring that moved skills and tests
under src/dotnet/.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve ! operator counting by stripping comments and strings

The scanner now removes block comments, line comments, verbatim strings,
interpolated strings, and regular strings before counting null-forgiving
operators. This eliminates false positives from ! in prose like
'Important!' or 'Value required!'.

Tests updated with exact assertions and fixtures enriched with !
in comments, XML docs, and string literals to verify filtering.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix misleading 'var is always nullable' wording

var does not inherently introduce nullability — the inferred type
carries nullability from the right-hand side expression. Updated
the pitfall description to reflect this accurately.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Make STJ RespectNullableAnnotations limitations more explicit

Clarify that the feature is opt-in, affects both serialization and
deserialization, and explicitly list what it does not cover:
collection elements, dictionary values, top-level types, and
generic type parameters.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add caveat that Debug.Assert is stripped from Release builds

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify that required does not enforce during deserialization

The required keyword is a compile-time and object-initializer
constraint. It does not replace runtime validation unless the
serializer explicitly supports it (e.g., STJ with [JsonRequired]).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add explicit version callouts for required, DbSet, JsonRequired

Consistently tag version requirements so the skill adapts across
repos targeting different .NET versions:
- required (C# 11+) on all mentions
- EF Core 7.0+ (.NET 7) for DbSet CS8618 suppression
- [JsonRequired] (.NET 7+)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add DTO vs domain model nullability guidance

DTOs should be nullable by default (they cross trust boundaries),
domain models should prefer non-nullable invariants. This distinction
is where migrations most often go wrong.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add gray area heuristics for parameter nullability decisions

From dotnet/runtime nullability guidelines: when a parameter is
neither validated nor documented for null, check usage patterns
in the codebase, whether null acts as a default/nop, and whether
similar methods accept null. When in doubt, prefer nullable.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Never infer nullability intent from usage frequency or naming

Explicit guard against AI hallucination: if intent is not clear
from code or documentation, ask the user rather than guessing.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Strengthen serialization bypass warning in pitfalls table

Reworded to anchor the rule: serializers bypass constructors,
non-nullable properties on DTOs do not imply runtime safety.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Stop and ask user if lang version or TFM is insufficient for NRTs

If the project targets C# 7.x or a framework that defaults below
C# 8.0, explicitly inform the user what needs to change and ask
whether to update or abort. Do not silently proceed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add = null! guidance for late-initialized fields in NRT skill

Add recommended technique for CS8618 warnings on fields set after
construction: use = null! on the field declaration instead of adding !
at every use site. Document the pattern in the CS8618 table row, the
annotation decision flowchart, and the Step 3 guidance section.

Motivated by exercising the skill on System.Text.RegularExpressions,
where = null! reduced ! operator count from 423 to 178 compared to
the original 2019 NRT annotation PR.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Categorize ! operators as null!/default! vs assertions in scanner

Break down the ! operator count into two categories:
- null!/default! initializers (safe, expected for late-initialized fields)
- assertions (value! patterns that warrant scrutiny)

This gives a more nuanced readiness assessment — a project with
30 null! and 5 assertions is in better shape than one with 35
assertions, even though the total is similar.

Update fixtures with null!/default! patterns and add 6 new test
assertions (25 total, up from 19).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add pre-migration effort estimate for CS8618 warnings

Count uninitialised reference-type fields and auto-properties as a
rough predictor of CS8618 warnings before NRT is enabled. Excludes
value types, events, const, and 'required' properties.

Shown only when NRT is not yet enabled, labeled as approximate.
In the corefx regex migration, CS8618 was 47% of all warnings (236
of 502), making this the single most useful pre-migration signal.

Adds 3 test assertions (28 total).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add per-file ! breakdown in scanner output

Show null!/default! vs assertion counts for each flagged file in
both human-readable and JSON output. This helps reviewers quickly
see which files have mostly safe initializers vs genuine assertions
that warrant scrutiny.

Example: 'RegexCompiler.cs: 31 ! (24 null!/default!, 7 assertions)'
tells the reviewer only 7 uses need attention, not 31.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Show per-file uninit fields pre-migration, suppress post-migration

Flag files with >5 uninitialised reference-type fields in 'Files
needing attention' so the pre-migration report shows where the most
CS8618 work will be. Suppress this metric when NRT is already
enabled since it's no longer actionable. Also skip empty lines in
per-file output when a file only triggered the uninit threshold but
NRT is enabled.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Context-aware section headings in scanner output

Replace generic 'Files needing attention' with context-dependent labels:
- Pre-migration (NRT not enabled): 'Migration work needed'
- Post-migration with remaining directives: 'Remaining cleanup'
- Post-migration clean: 'Suppression audit (Step 6)' — frames !
  operators as review candidates, not problems

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove Step 6 reference from scanner output to avoid sync issues

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add before/after example output to scanner script header

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Advocate RespectNullableAnnotations as best practice for .NET 9+

Reframe guidance from neutral opt-in to prescriptive best practice,
add motivation for why it matters, and recommend companion setting
RespectRequiredConstructorParameters.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add zero-IL-change principle as hard rule for NRT migration

Add prominent top-level principle: NRT migration must never change
runtime behavior or generated IL. Missing null guards should be
flagged as TODO comments (with user consent), not added inline.
Update the existing null validation guidance to align.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add TFM caveat to Debug.Assert null-state guidance

Debug.Assert acts as a nullable flow-analysis hint only on
.NET Core 3.0+ where it has [DoesNotReturnIf(false)]. On
.NET Framework/netstandard2.0 it lacks this annotation and
does not affect null-state analysis.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Revert Debug.Assert TFM caveat

The skill targets .NET Core 3.0+ where Debug.Assert has
[DoesNotReturnIf(false)]. No need to document .NET Framework
behavior since we don't encourage NRTs on older TFMs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add return-type semantic nullability guidance to NRT skill

Round-trip experiment on Dapper (51 files, 984 warnings) revealed the agent
systematically removed ? from 40 public return types (OrDefault, ExecuteScalar)
to satisfy the compiler, but those methods can return null by design. Added
explicit guidance that return types must reflect semantic nullability, not just
compiler satisfaction, with specific patterns to watch for.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Strip string literals before comments in scanner

Reorder the regex passes so strings are removed before comments.
A string like "http://..." contains // that was previously
mis-parsed as a line comment, corrupting downstream text.

Add a URL-in-string test case to the nrt-enabled fixture.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add NRT skill guidance from real-world evaluation

Tested the skill against NimblePros/eShopOnWeb (ASP.NET Core + EF Core).
Stripped NRT annotations from 44 files, re-annotated using the skill,
and compared against the originals. Found 3 areas for improvement:

ef-core.md:
- Add guidance to always pair #pragma warning disable CS8618 with
  #pragma warning restore CS8618 to prevent suppression leakage

aspnet-core.md:
- Add Razor Pages [BindProperty] initialization guidance
- Add collection property default initialization guidance
- Call out the ?.+! anti-pattern (contradictory null handling)

SKILL.md:
- Add guard clause library awareness (Ardalis.GuardClauses, Dawn.Guard
  use [NotNull] attributes that narrow null state — avoid redundant !)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Rename skill to migrate-nullable-references, wire scanner tests into eval.yaml, merge main

- Rename nullable-reference-migration -> migrate-nullable-references per CONTRIBUTING.md naming convention (lead with action verb)
- Update YAML front-matter name field
- Update scanner script and test script references to new directory name
- Add scanner script eval scenario to eval.yaml using test fixtures
- Merge latest main for CI/eval infrastructure updates

Fixes #38

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove en-us locale from learn.microsoft.com URLs in NRT skill

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove scanner eval scenario (script tests stay in Test-ScanNullableReadiness.ps1)

The scanner script scenario doesn't work as an eval scenario because the baseline
run has no access to skill resources (source: files aren't resolved when skill=null).
Scanner tests are validated separately via Test-ScanNullableReadiness.ps1.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve eval rubric for correctness and fix code formatting

Replace generic throughput rubric with 5 correctness-focused criteria:
- Value-type avoidance (int, bool, DateTime)
- Nullable return types for FirstOrDefault methods
- Late-init field handling (_header in CsvExporter)
- Interface/implementation consistency
- Zero-warning build

Also fix C# code formatting in setup files (namespace/class
declarations were collapsed onto single lines).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Improve migrate-nullable-references skill routing and deduplication

- Add structured USE FOR / DO NOT USE FOR / INVOKES to description
- Add multi-project solution migration order note in Step 2
- Deduplicate serialization/DTO pitfall (cross-ref Step 4)
- Shorten redundant ArgumentNullException pitfall row

Multi-model validation: Sonnet 4.8/5, GPT-5.1 4.6/5, Haiku 4.8/5 (avg 4.73)
No regressions detected.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add minimal API parameter optionality guidance per halter73 review

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix contradiction in CS86xx fix guidance per eerhardt review

The warning fix table recommended adding null checks/guards, contradicting
the zero-runtime-behavior-change rule in line 35. Reworded to prioritize
annotation-only fixes (? and !) and note that null checks change behavior.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Skill: prefer [NotNullWhen(true)] over ! at call sites

When a boolean-returning helper guarantees a nullable parameter is non-null,
annotating the parameter with [NotNullWhen(true)] is better than sprinkling
! at every call site. This is metadata-only (no behavior change) and gives
the compiler real flow information.

Based on feedback from reviewing skill-guided NRT migration output on
dotnet/roslyn#58107 — the agent used ! without comment instead of annotating
the helper method.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove WhereNotNull helper extensions; refine skill scope

- Delete helper-extensions.md (WhereNotNull was rejected as a BCL API and
  is only used internally in Roslyn)
- Update LINQ guidance to recommend OfType<T>() instead
- Add 'fixing a handful of warnings' to DO NOT USE FOR in description

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Rename Scan-NullableReadiness to Get-NullableReadiness per convention

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add ASP.NET Core + EF Core eval scenario for NRT migration

Exercises EF Core navigation property nullability, DbSet handling,
and ASP.NET model validation behavior changes when enabling NRTs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add file_not_contains assertion and file-by-file eval scenario

Add file_not_contains assertion type to skill-validator, mirroring
file_contains but asserting the value is absent. Includes 3 tests.

Add eval scenario testing file-by-file NRT migration: agent must
modify only the targeted file while leaving others unchanged.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix YAML frontmatter: use block scalar for description with colons

The colons in USE FOR:/DO NOT USE FOR:/INVOKES: caused YAML parse
failures in skill-validator. Use > block scalar syntax per lewing review.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Strengthen CS8603 return-type guidance and add return null! anti-pattern

Clarify that non-nullable return type is a promise to callers.
Add explicit warning against return null!/default! pattern.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Extract nullable attributes table to optional reference

Move the System.Diagnostics.CodeAnalysis attributes table from Step 5
inline content to references/nullable-attributes.md, reducing the core
skill by ~500 tokens. The inline step retains a summary listing the
key attribute names so the agent knows what's available and when to
load the reference.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Tweak ASP.NET/EF eval scenario prompt wording

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move skill to plugins/tests layout, add CODEOWNERS for migrate-nullable-references

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review: remove spoon-fed build commands, refocus rubric on skill value

- Remove explicit 'Build with:' lines from eval prompts so the skill's
  Step 1 (discover build command) is actually exercised
- Reword file-by-file rubric to test the skill's migration strategy
  rather than general instruction compliance

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Larry Ewing <lewing@microsoft.com>
2026-03-02 10:12:21 -08:00
Viktor Hofer 1cfa908e91 Add CODEOWNERS file with per-skill ownership (#148)
* Add CODEOWNERS file with per-skill ownership

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update .github/CODEOWNERS

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add code ownership requirements to CONTRIBUTING.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Move code ownership section near top of CONTRIBUTING.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update .github/CODEOWNERS

Co-authored-by: Jared Parsons <jared@paranoidcoding.org>

* Update .github/CODEOWNERS

Co-authored-by: Jared Parsons <jared@paranoidcoding.org>

* Update .github/CODEOWNERS

Co-authored-by: Jared Parsons <jared@paranoidcoding.org>

* Update .github/CODEOWNERS

Co-authored-by: Jared Parsons <jared@paranoidcoding.org>

* Update .github/CODEOWNERS

Co-authored-by: Jared Parsons <jared@paranoidcoding.org>

* Update .github/CODEOWNERS

* Update .github/CODEOWNERS

* Update .github/CODEOWNERS

Co-authored-by: Jared Parsons <jared@paranoidcoding.org>

* Modify CODEOWNERS for msbuild and cleanup

Updated CODEOWNERS to change 'dotnet-msbuild' to 'msbuild' and removed TODO comment.

* Fix CODEOWNERS case sensitivity for TimHeuer

* Fix CODEOWNERS syntax for user list

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Jared Parsons <jared@paranoidcoding.org>
2026-02-27 16:26:54 -08:00