Add modern F# idiom instructions for Copilot / Claude Code - #20399

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xperiandri:modern-fsharp-copilot-instructions

Commits on Sep 14, 2026

Add modern F# idiom instructions for Copilot and Claude Code
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9ed8d6e
Soften task{} guidance in FSharp.instructions.md

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claude
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fd867cf
Prefer one traversal over a chain of transformations

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2341d00
Correct the string-comparison rule for netstandard2.0 and identifiers

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6ed54d6
Reserve Seq.cast for untyped input

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f2c30d1
Note that scoped nowarn needs F# 10

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079c0cc
Note when a lambda must not be eta-reduced

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daaaf38
Point at the V-suffixed voption helpers vsintegration already has

xperiandri
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0404e44
Keep voption for fields and cross-thread values, and convert to option last

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6d5b844