dotnet/fsharp

release-notes

Write per-PR changelog entries for completed F# changes, or draft and review F# release announcements and articles for .NET preview, RC, and stable milestones.

Idioma del texto original: inglés

proposing-pr-rewrites

Use when reviewing a PR where duplicated mechanisms, misplaced responsibilities, or competing fixes suggest a substantial design alternative rather than local corrections. Not for isolated bugs, style preferences, or size alone.

Idioma del texto original: inglés

feature-completeness

Use when about to defer useful work — when you catch yourself writing "follow-up", "future work", "out of scope", "v2", "next phase", "tracked in #NNN", "left as a TODO", "known limitation", or proposing to file an issue instead of finishing. Forces a binary…

Idioma del texto original: inglés

code-compaction

Use when a code/test/comment diff is called bloated, slop, LLM slop, bullshit, WTF, crap, rubbish, embarrassing, overengineered, adhoc, or "not paid by LOC"; or when symptoms include bloated comments, superfluous planning .md / .tools / one-time setup /…

Idioma del texto original: inglés

hypothesis-driven-debugging

Investigate compiler failures, test errors, or unexpected behavior through systematic minimal reproduction, 3-hypothesis testing, and verification. Always re-run builds and tests after changes.

Idioma del texto original: inglés

postmortem

Write a postmortem for a regression that escaped to production, broke real users, and traces back to a design flaw worth documenting for future implementors. Only invoke after confirming no existing postmortem or doc covers the same root cause.

Idioma del texto original: inglés

fsharp-diagnostics

Always invoke after editing `.fs` files under `src/Compiler/`. Fast parse/typecheck without `dotnet build`, plus symbol references and inferred type hints. Use whenever the user asks about F# errors, compile errors, type inference, finding usages, or renaming…

Idioma del texto original: inglés

pr-description

Use when drafting, proposing, creating, or editing prose for a dotnet/fsharp GitHub PR or issue — body, title, comment, review summary, edits — including bare asks like "open a PR", "ship this", "write up what I did", "summarise the change", "reply on the…

Idioma del texto original: inglés

realsig-codegen

Debug and fix --realsig+ (RealInternalSignature) codegen bugs in IlxGen — MethodAccessException / FieldAccessException / TypeAccessException at runtime, IL `private` vs `assembly` visibility, closure and TLR-lift placement (cloc / NestedTypeRefForCompLoc /…

Idioma del texto original: inglés

ilverify-failure

Fix ILVerify baseline failures when IL shape changes (codegen, new types, method signatures). Use when CI fails on ILVerify job.

Idioma del texto original: inglés

binlog-analysis

Triage a build / compile / restore / WarnAsError failure from its MSBuild binary log. Fetches the binlog (a local build's, or a failed dotnet/fsharp Azure DevOps PR build's published artifact) and analyzes it live via the `binlog-mcp` MCP server — structured…

Idioma del texto original: inglés

pr-build-status

Retrieve and analyze Azure DevOps build failures for GitHub PRs. Use when CI fails. CRITICAL: Collect ALL errors from ALL platforms FIRST, write hypotheses to file, then fix systematically.

Idioma del texto original: inglés

reviewing-compiler-prs

Performs multi-agent, multi-model code review of F# compiler PRs across 19 dimensions including type checking, IL emission, binary compatibility, and IDE performance. Dispatches parallel assessment agents per dimension, consolidates with cross-model agreement…

Idioma del texto original: inglés

flaky-test-detector

Detect flaky tests by scanning recent AzDo CI builds for test failures recurring across multiple unrelated PRs. Use when investigating intermittent failures, CI instability, deciding which tests to quarantine, or checking if RunTestCasesInSequence no-ops are…

Idioma del texto original: inglés

vsintegration-ide-debugging

Fix F# debugging issues (breakpoints, .pdb, sequence points). Build, run VS integration tests, inspect IL/PDB.

Idioma del texto original: inglés

creating-skills

Create custom agent capabilities when discovering novel tools, receiving task-agnostic tips from reviewers, or after researching specialized workflows not covered in existing instructions. Teaches structure, YAML optimization for LLM discoverability, and…

Idioma del texto original: inglés