4.60.1

- [ufoLib] Reverted accidental method name change in ``UFOReader.getKerningGroupConversionRenameMaps``
  that broke compatibility with downstream projects like defcon (#3948, #3947, robotools/defcon#478).
- [ufoLib] Added test coverage for ``getKerningGroupConversionRenameMaps`` method (#3950).
- [subset] Don't try to subset BASE table; pass it through by default instead (#3949).
- [subset] Remove empty BaseRecord entries in MarkBasePos lookups (#3897, #3892).
- [subset] Add pruning for MarkLigPos and MarkMarkPos lookups (#3946).
- [subset] Remove duplicate features when subsetting (#3945).
- [Docs] Added documentation for the visitor module (#3944).

4.60.0

- [pointPen] Allow ``reverseFlipped`` parameter of ``DecomposingPointPen`` to take a ``ReverseFlipped``
  enum value to control whether/how to reverse contour direction of flipped components, in addition to
  the existing True/False. This allows to set ``ReverseFlipped.ON_CURVE_FIRST`` to ensure that
  the decomposed outline starts with an on-curve point before being reversed, for better consistency
  with other segment-oriented contour transformations. The change is backward compatible, and the
  default behavior hasn't changed (#3934).
- [filterPen] Added ``ContourFilterPointPen``, base pen for buffered contour operations, and
  ``OnCurveStartPointPen`` filter to ensure contours start with an on-curve point (#3934).
- [cu2qu] Fixed difference in cython vs pure-python complex division by real number (#3930).
- [varLib.avar] Refactored and added some new sub-modules and scripts (#3926).
  * ``varLib.avar.build`` module to build avar (and a missing fvar) binaries into a possibly empty TTFont,
  * ``varLib.avar.unbuild`` module to print a .designspace snippet that would generate the same avar binary,
  * ``varLib.avar.map`` module to take TTFont and do the mapping, in user/normalized space,
  * ``varLib.avar.plan`` module moved from ``varLib.avarPlanner``.
  The bare ``fonttools varLib.avar`` script is deprecated, in favour of ``fonttools varLib.avar.build`` (or ``unbuild``).
- [interpolatable] Clarify ``linear_sum_assignment`` backend options and minimal dependency
  usage (#3927).
- [post] Speed up ``build_psNameMapping`` (#3923).
- [ufoLib] Added typing annotations to fontTools.ufoLib (#3875).

4.59.2

- [varLib] Clear ``USE_MY_METRICS`` component flags when inconsistent across masters (#3912).
- [varLib.instancer] Avoid negative advance width/height values when instatiating HVAR/VVAR,
  (unlikely in well-behaved fonts) (#3918).
- [subset] Fix shaping behaviour when pruning empty mark sets (#3915, harfbuzz/harfbuzz#5499).
- [cu2qu] Fixed ``dot()`` product of perpendicular vectors not always returning exactly 0.0
  in all Python implementations (#3911)
- [varLib.instancer] Implemented fully-instantiating ``avar2`` fonts (#3909).
- [feaLib] Allow float values in ``VariableScalar``'s axis locations (#3906, #3907).
- [cu2qu] Handle special case in ``calc_intersect`` for degenerate cubic curves where 3 to 4
  control points are equal (#3904).

4.59.1

- [featureVars] Update OS/2.usMaxContext if possible after addFeatureVariationsRaw (#3894).
- [vhmtx] raise TTLibError('not enough data...') when hmtx/vmtx are truncated (#3843, #3901).
- [feaLib] Combine duplicate features that have the same set of lookups regardless of the order in which those lookups are added to the feature (#3895).
- [varLib] Deprecate ``varLib.mutator`` in favor of ``varLib.instancer``. The latter
  provides equivalent full (static font) instancing in addition to partial VF instancing.
  CLI users should replace ``fonttools varLib.mutator`` with ``fonttools varLib.instancer``.
  API users should migrate to ``fontTools.varLib.instancer.instantiateVariableFont`` (#2680).

4.59.0

- Removed hard-dependency on pyfilesystem2 (``fs`` package) from ``fonttools[ufo]`` extra.
  This is replaced by the `fontTools.misc.filesystem` package, a stdlib-only, drop-in
  replacement for the subset of the pyfilesystem2's API used by ``fontTools.ufoLib``.
  The latter should continue to work with the upstream ``fs`` (we even test with/without).
  Clients who wish to continue using ``fs`` can do so by depending on it directly instead
  of via the ``fonttools[ufo]`` extra (#3885, #3620).
- [xmlWriter] Replace illegal XML characters (e.g. control or non-characters) with "?"
  when dumping to ttx (#3868, #71).
- [varLib.hvar] Fixed vertical metrics fields copy/pasta error (#3884).
- Micro optimizations in ttLib and sstruct modules (#3878, #3879).
- [unicodedata] Add Garay script to RTL_SCRIPTS (#3882).
- [roundingPen] Remove unreliable kwarg usage. Argument names aren’t consistent among
  point pens’ ``.addComponent()`` implementations, in particular ``baseGlyphName``
  vs ``glyphName`` (#3880).

4.58.5

- [feaLib] Don't try to combine ligature & multisub rules (#3874).
- [feaLib/ast] Use weakref proxies to avoid cycles in visitor (#3873).
- [varLib.instancer] Fixed instancing CFF2 fonts where VarData contains more than 64k items (#3858).

4.58.4

- [feaLib] Allow for empty MarkFilter & MarkAttach sets (#3856).

4.58.3

- [feaLib] Fixed iterable check for Python 3.13.4 and newer (#3854, #3855).

4.58.2

- [ttLib.reorderGlyphs] Handle CFF2 when reordering glyphs (#3852)
- [subset] Copy name IDs in use before scrapping or scrambling them for webfonts (#3853)

4.58.1

- [varLib] Make sure that fvar named instances only reuse name ID 2 or 17 if they are at the default location across all axes, to match OT spec requirement (#3831).
- [feaLib] Improve single substitution promotion to multiple/ligature substitutions, fixing a few bugs as well (#3849).
- [loggingTools] Make ``Timer._time`` a static method that doesn't take self, makes it easier to override (#3836).
- [featureVars] Use ``None`` for empty ConditionSet, which translates to a null offset in the compiled table (#3850).
- [feaLib] Raise an error on conflicting ligature substitution rules instead of silently taking the last one (#3835).
- Add typing annotations to T2CharStringPen (#3837).
- [feaLib] Add single substitutions that were promoted to multiple or ligature substitutions to ``aalt`` feature (#3847).
- [featureVars] Create a default ``LangSys`` in a ``ScriptRecord`` if missing when adding feature variations to existing GSUB later in the build (#3838).
- [symfont] Added a ``main()``.
- [cffLib.specializer] Fix rmoveto merging when blends used (#3839, #3840).
- [pyftmerge] Add support for cmap format 14 in the merge tool (#3830).
- [varLib.instancer/cff2] Fix vsindex of Private dicts when instantiating (#3828, #3232).
- Update text file read to use UTF-8 with optional BOM so it works with e.g. Windows Notepad.exe (#3824).
- [varLib] Ensure that instances only reuse name ID 2 or 17 if they are at the default location across all axes (#3831).
- [varLib] Create a dflt LangSys in a ScriptRecord when adding variations later, to fix an avoidable crash in an edge case (#3838).