Issues

• Identifier types expose no parsed values: add Uuid.ToGuid(), JWT header/payload decoding, ISBN-10↔13 conversion, credit-card network detection

  enhancement
  ktsu-dev/Semantics#359 · Filter by author matt-edmondson opened on Sep 30, 2026

• Chord.ToString() writes non-standard symbols: G9 → "G79", Gmaj9 → "Gmaj79", G13 → "G713", G7sus4 → "Gsus47", C6/9 → "C6add9"

  enhancement
  ktsu-dev/Semantics#358 · Filter by author matt-edmondson opened on Sep 30, 2026
  1

• Progression.Cadences reports a Half cadence for every V→V pair: "4/4 C | G | G | G" yields three half cadences

  bug
  ktsu-dev/Semantics#357 · Filter by author matt-edmondson opened on Sep 30, 2026

• Chord.Voice(octave, inversion) puts the root back in the bass from the 4th inversion of extended chords: C9 inversion 4 gives C5 D5 E5 G5 A#5

  bug
  ktsu-dev/Semantics#356 · Filter by author matt-edmondson opened on Sep 30, 2026

• MixOklab/Gradient/FromOklab return out-of-gamut channels, and later HSL adjustments go wrong: white round-tripped through Oklab then DarkenBy(0.5) gives yellow #FFE500

  bug
  ktsu-dev/Semantics#355 · Filter by author matt-edmondson opened on Sep 30, 2026

• Wavelength/Period/HalfLife reach zero via w - w, w * 0 and Wavelength.From(Length.Zero): the strictly-positive guard only covers From{Unit}

  bug
  ktsu-dev/Semantics#354 · Filter by author matt-edmondson opened on Sep 30, 2026
  1

• Duration accepts zero and negative lengths, so Note, Rest, ChordEvent and Progression.Parse accept "C4:-1/4:v64", "R:0/4", "C@-1/4"

  bug
  ktsu-dev/Semantics#353 · Filter by author matt-edmondson opened on Sep 30, 2026
  1

• Logarithmic scales throw OverflowException for zero with decimal/integer storage: Gain<decimal>.Silence.ToDecibels() crashes despite docs promising negative infinity

  bug
  ktsu-dev/Semantics#352 · Filter by author matt-edmondson opened on Sep 30, 2026
  1

• Color.AdjustForContrast returns the original failing colour for saturated foregrounds (blue on #777777 stays at 1.92:1 though black reaches 4.69:1)

  bug
  ktsu-dev/Semantics#351 · Filter by author matt-edmondson opened on Sep 30, 2026
  1

• Add a Semantics.Strings.Web package: EmailAddress, Url/HttpUrl, Hostname, DomainName, IpV4, IpV6, MacAddress, PhoneNumber (E.164), Slug

  enhancement
  ktsu-dev/Semantics#348 · Filter by author matt-edmondson opened on Sep 30, 2026
  1

• Add a Semantics.Strings.Formats package: Base64, Base64Url, HexString, SemVer, HexColor

  enhancement
  ktsu-dev/Semantics#347 · Filter by author matt-edmondson opened on Sep 30, 2026
  1

• Chord.Parse accepts quality characters in any order and any number: "C7M", "C57", "C77" and "C7m" all parse as C7

  bug
  ktsu-dev/Semantics#346 · Filter by author matt-edmondson opened on Sep 30, 2026
  2

• Chord.Parse reads "-"/"+" alteration signs as chord quality: "C7-9" becomes Cm9, "C7-5" becomes Cm7, "Cmaj7-5" becomes CmMaj7, "C7+9" becomes Caug9

  bug
  ktsu-dev/Semantics#345 · Filter by author matt-edmondson opened on Sep 30, 2026
  2

• Chord.Parse drops everything after the slash-bass note: "C/Gm", "C/E/G" and "C/Bb7" parse as "C/G", "C/E" and "C/A#"

  bug
  ktsu-dev/Semantics#344 · Filter by author matt-edmondson opened on Sep 30, 2026
  2

• Chord.Parse stacks the natural 9th/11th under an altered one: "C13#11" sounds both F and F#, "C13b9" both Db and D

  bug
  ktsu-dev/Semantics#341 · Filter by author matt-edmondson opened on Sep 30, 2026
  2

• Chord.Parse reads "Cm7#5", "Cm#5" and "Cm+" as augmented chords with a major third (Cm7#5 comes back as Caug7)

  bug
  ktsu-dev/Semantics#340 · Filter by author matt-edmondson opened on Sep 30, 2026
  2

• Arrangement.Parse rejects a chart whose sections are separated by two blank lines or by a whitespace-only line

  bug
  ktsu-dev/Semantics#339 · Filter by author matt-edmondson opened on Sep 29, 2026
  1

• [PrefixAndSuffix] lets prefix and suffix overlap: [PrefixAndSuffix("\"", "\"")] accepts a lone ", and empty strings always pass

  bug
  ktsu-dev/Semantics#338 · Filter by author matt-edmondson opened on Sep 29, 2026
  1

• ChromaticChords reports a minor key's own dominant (E / E7 in A minor) as "borrowed from parallel major"

  bug
  ktsu-dev/Semantics#337 · Filter by author matt-edmondson opened on Sep 29, 2026
  1

• Chord.ToString() writes an altered tension straight after the root: "C(#11)" prints as "C#11" and reparses as a C# dominant eleventh

  bug
  ktsu-dev/Semantics#336 · Filter by author matt-edmondson opened on Sep 29, 2026
  2

• Isbn accepts any EAN-13 barcode: Isbn.Create("4006381333931") (a non-book product code) validates because the 978/979 prefix is never checked

  bug
  ktsu-dev/Semantics#334 · Filter by author matt-edmondson opened on Sep 29, 2026
  1

• A rejected CreditCardNumber, JwtToken or Iban puts the full value in the exception message, and the message never says which rule failed

  bug
  ktsu-dev/Semantics#333 · Filter by author matt-edmondson opened on Sep 29, 2026
  1

• Paths: RelativeFilePath applies Windows-only character and length rules on POSIX

  ktsu-dev/Semantics#330 · Filter by author matt-edmondson opened on Sep 29, 2026
  1

• JwtToken accepts segments that are not base64url: embedded spaces ("eyJh bGci OiJI UzI1 NiJ9.…"), = padding and +// all validate

  bug
  ktsu-dev/Semantics#329 · Filter by author matt-edmondson opened on Sep 29, 2026
  1

• Progression.Parse silently drops beat slashes after a Chord@n/d cell: "4/4 C@1/2 / / | G" parses as C for 2 beats with G on beat 3

  bug
  ktsu-dev/Semantics#328 · Filter by author matt-edmondson opened on Sep 29, 2026
  1