v5.0.0a7

v5 changes up to this point. Most notably in this release we re-introduced the rich-rst dependency now that licensing issues have been resolved.

Breaking

• Removed fuzzy command-matching. Command names must match exactly.

  • It was a temporary v4 backwards-compat shim (#666) for the PascalCase → pascal-case name-transform change, retrying by stripping dashes/underscores on no exact match. Removed as cleanup for the major release.

  @app.command
  def MyCommand(): ...   # registers as "my-command"
  # v4: `mycommand` fuzzy-matched -> my-command
  # v5: `mycommand` no longer resolves; use `my-command`

Features

• Variable token-lengths within a Union. Members that consume a different
  number of tokens can now coexist. Order matters: the longer (multi-token)
  member should come first so it gets first claim on the tokens.

  def main(value: tuple[int, int] | int): ...
  # --value 5      -> 5
  # --value 1 2    -> (1, 2)

  On v4 this raises Cannot Union types that consume different numbers of tokens.

• list[Union[...]] with differing token-lengths. Each element is matched
  independently against the union members.

  def main(coords: list[tuple[int, int] | int]): ...

• null/none (case-insensitive) parse to None. Applies to optional
  types. Union ordering decides the result: a member that legitimately accepts
  the literal string wins first.

  def main(value: int | None): ...      # --value none  -> None
  def main(path: Path | None): ...      # --path none   -> Path("none")  (Path matches first)
  def main(value: str | None): ...      # --value none  -> "none"        (str matches first)
  # works inside collections too:  list[int | None]  "1 none 3" -> [1, None, 3]

Misc

• RST help now uses rich-rst v2 (has friendly licensing). Dependency pin moved
  from rich-rst>=1.3.1,<3 to rich-rst>=2.0.1,<3.