1.20.0 (2026-08-08)

• New RemoteCallbacks.custom_headers()
  #1465

• New rebase API: Repository.rebase_init(...), Repository.rebase_open(...),
  Rebase, and RebaseOperation
  #1483

• Fix Config.snapshot() for non-repository configs, allow PathLike in
  Config.__init__(), and improve config documentation
  #1468

• Fix UnicodeDecodeError with non-UTF-8 file paths in Repository.status(),
  DiffFile.path, index paths, checkout callbacks, and related APIs
  #1451
  #1469

• Fix enums.CheckoutStrategy.CONFLICT_STYLE_ZDIFF3, which was mistakenly
  bound to the DIFF3 constant
  #1483

• Fix crashes and reference-lifetime bugs in custom refdb backends
  #1471
  #1474
  #1475
  #1476

• Update wheels to libgit2 1.9.6 and OpenSSL 3.5.7

• Add riscv64 wheels
  #1463

Breaking changes:

• Remove deprecated pygit2.legacyenums module and GIT_* constants,
  use pygit2.enums instead

• Remove deprecated support for passing str to Repository.merge(...),
  pass a Commit, Oid, or Reference object instead

• Repository.merge_file_from_index(...) now returns MergeFileResult by
  default; pass use_deprecated=True for the previous string return, now
  deprecated.

• Remove deprecated Remote.ls_remotes(...), use Remote.list_heads(...)
  instead

• Remove pygit2.to_bytes(...) and pygit2.to_str(...); they were undocumented
  accidental public APIs