fantomas 8.0.5
dotnet tool install --global fantomas --version 8.0.5
dotnet new tool-manifest
dotnet tool install --local fantomas --version 8.0.5
#tool dotnet:?package=fantomas&version=8.0.5
nuke :add-package fantomas --version 8.0.5
Fantomas
An opinionated F# source code formatter.
dotnet tool install fantomas
Documentation is available at https://fsprojects.github.io/fantomas/docs/index.html
If you point a coding agent at Fantomas, give it llms.txt for an index of the documentation, or llms-full.txt for all of it in one file.
Reporting a bug
Report bugs through the online tool, which opens an issue with everything needed to reproduce it.
With a coding agent, the fantomas-report skill shrinks the file Fantomas failed on to a minimal sample and opens the same issue form for you to review:
npx skills add fsprojects/fantomas --skill fantomas-report -g
See Reporting a bug for more.
Contributing Guidelines
See the Contribution Guidelines and our contributors documentation
| Product | Versions Compatible and additional computed target framework versions. |
|---|---|
| .NET | net10.0 is compatible. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed. |
This package has no dependencies.
| Version | Downloads | Last Updated |
|---|---|---|
| 8.0.5 | 428 | 9/25/2026 |
| 8.0.4 | 980 | 9/23/2026 |
| 8.0.3 | 164 | 9/23/2026 |
| 8.0.2 | 2,726 | 9/22/2026 |
| 8.0.1 | 1,313 | 9/21/2026 |
| 8.0.0 | 18,158 | 9/15/2026 |
| 8.0.0-beta-003 | 962 | 9/12/2026 |
| 8.0.0-beta-002 | 308 | 9/8/2026 |
| 8.0.0-beta-001 | 792 | 9/1/2026 |
| 8.0.0-alpha-026 | 340 | 8/29/2026 |
| 8.0.0-alpha-025 | 227 | 8/28/2026 |
| 8.0.0-alpha-024 | 124 | 8/28/2026 |
| 8.0.0-alpha-023 | 127 | 8/28/2026 |
| 8.0.0-alpha-022 | 347 | 8/27/2026 |
| 8.0.0-alpha-021 | 113 | 8/27/2026 |
| 8.0.0-alpha-020 | 128 | 8/27/2026 |
| 8.0.0-alpha-019 | 458 | 8/26/2026 |
| 8.0.0-alpha-018 | 119 | 8/26/2026 |
| 8.0.0-alpha-017 | 3,165 | 8/25/2026 |
| 8.0.0-alpha-016 | 488 | 8/25/2026 |
### Changed
- Improved formatting performance. Formatting the source files of dotnet/fsharp allocates around 40% less memory and is roughly 1.4 times faster than `8.0.4`, depending on hardware. The fields of `WriterEvent`, returned by `CodeFormatter.GetWriterEventsAsync`, are renamed so that cases share them: `text` for the strings, `amount` for `IndentBy` and `UnIndentBy`, `column` for the indent and column cases, and `nodeType` and `range` for `NodeEnd`. [#3499](https://github.com/fsprojects/fantomas/pull/3499)
- Update FCS to 'Record the range of the `exception`in SynExceptionDefnRepr', commit 349d6aaf1e4685a72e43b7f4a0708205e4104b4c [#3500](https://github.com/fsprojects/fantomas/pull/3500)
### Fixed
- Comment between doc comment and exception keyword gets shifted. The syntax tree had no range for the `exception` keyword, so a comment between the XML doc or attributes and the keyword was placed in front of the exception name, after the keyword. The parser now records that range, and the comment stays in front of the keyword. [#3483](https://github.com/fsprojects/fantomas/issues/3483)