* \[**BREAKING**\] The filenames and package filenames are changed.
- They will now use PascalCase instead of kebab-case.
- To package manager maintainers: Please upgrade your script to make it capable to download and install the fonts under new names, and properly uninstall the fonts under old names.
* \[**BREAKING**\] Certain properties in the build plans are changed to camelCase. Using them will trigger a build failure.
* \[**BREAKING**\] The "SGr" TTC packages for Iosevka Aile and Etoile will no longer be generated, as they are duplicates to the non-SGr TTC packages.
* \[**BREAKING**\] Reorder of glyph variants:
- Influenced characters: `M`, `R`, `f`, `i`, `l`, `t`, `x`, Long S (`ſ`), Lower Lambda (`λ`), Lower Tau (`τ`), Lower Chi (`χ`), Cyrillic Lower Em (`м`), Cyrillic Lower Ef (`ф`), Cyrillic Ya (`Я`, `я`), `5`.
* \[**BREAKING**\] Tags for variant features for Cyrillic lowercase Er and U are changed to `cv76` and `cv78`.
- Various other glyph variant tags are also changed to reflect this insertion.
* \[**BREAKING**\] Make the ligation group names for symbol connections more intuitive, and add alternatives to start chaining from at least 3 continuous characters (#2100):
- TWO DOTS OVER ONE DOT PUNCTUATION (`U+2E2A`) ... FIVE DOT MARK (`U+2E2D`).
- LATIN SMALL LETTER U WITH LEFT HOOK (`U+AB52`).
- MODIFIER LETTER SMALL U WITH LEFT HOOK (`U+AB5F`).
* Add hook-inward-serifed variants for `a` (#2085).
* Add single-storey-double-serifed and single-storey-tailed-serifed variants for `a` and Greek Lower Alpha (`α`) (#1949).
- Make `a`.`single-storey-tailed-serifed` the default for slab italic to match `g` and `q`.
* Add bottom-serifed variants for `d`, and `q`.
* Add bottom-right-serifed variants for `U`.
* Add tailless variants for Greek Lower Iota (`ι`).
* Make Greek Lower Iota (`ι`) and Greek Lower Tau (`τ`) semi-tailed under default upright and tailed under default italic.
* Remove earless-rounded variants for `U+01A5`, `U+0256`, `U+02A0`, and `U+1D91`.
* Remove earless-corner variants for `U+027E`.
* Improve serifs for turned k (`U+029E`) to match `q` and turned h (`U+0265`).
* Improve top-left serif for LATIN SMALL LETTER KRA (`U+0138`) to match `k`.
* Make Greek Kappa (`U+03BA`) respond to more serif variants for `k` (`cv36`).
* Add a top-left serif to GREEK SMALL LETTER HETA (`U+0371`) under slab.
* Add a serif to MATHEMATICAL DOUBLE-STRUCK SMALL J (`U+1D55B`) to match that of MATHEMATICAL DOUBLE-STRUCK SMALL I (`U+1D55A`).
* Improve vertical alignmant of bowl for LATIN CAPITAL LETTER THORN WITH STROKE (`U+A764`) and LATIN CAPITAL LETTER THORN WITH STROKE THROUGH DESCENDER (`U+A766`).