FontBakery Check Report

If you think a check is flawed or have an idea for a check, please file an issue at https://github.com/fonttools/fontbakery/issues and remember to include a pointer to the repo and branch you're checking.

Summary

💥 ERROR	☠ FATAL	🔥 FAIL	⚠️ WARN	⏩ SKIP	ℹ️ INFO	✅ PASS
0	0	6	11	40	8	181
0%	0%	2%	4%	16%	3%	74%

Meaning of check results:

💥 An ERROR is something wrong with FontBakery itself, possibly a bug.
☠ A FATAL is an extremely severe issue that must be addressed immediately.
🔥 A FAIL is a problem with the font that must be fixed.
⚠️ A WARN is something that you should consider addressing.
ℹ️ An INFO result simply prints something useful. Typically stats.
✅ A PASS means the font looks good for the given checking routine.
⏩ And a SKIP happens when the check does not apply to the given font.

If you get ERRORs, please help us improve the tool by reporting them at our issue tracker.

(but other kinds of bug reports and/or feature requests are also always welcome, of course!)

FontBakery version: 0.12.10

OpenType Specification Checks

⚠️⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩

Fonts have consistent underline thickness?

Check ID: <FontBakeryCheck:com.google.fonts/check/family/underline_thickness>

Fonts have consistent PANOSE family type?

Check ID: <FontBakeryCheck:com.google.fonts/check/family/panose_familytype>

Make sure all font files have the same version value.

Check ID: <FontBakeryCheck:com.google.fonts/check/family/equal_font_versions>

Check that OS/2.fsSelection bold & italic settings are unique for each NameID1

Check ID: <FontBakeryCheck:com.adobe.fonts/check/family/bold_italic_unique_for_nameid1>

Verify that each group of fonts with the same nameID 1 has maximum of 4 fonts.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/family/max_4_fonts_per_family_name>

Verify that family names in the name table are consistent across all fonts in the family. Checks Typographic Family name (nameID 16) if present, otherwise uses Font Family name (nameID 1)

Check ID: <FontBakeryCheck:com.adobe.fonts/check/family/consistent_family_name>

CFF table FontName must match name table ID 6 (PostScript name).

Check ID: <FontBakeryCheck:com.adobe.fonts/check/name/postscript_vs_cff>

Name table ID 6 (PostScript name) must be consistent across platforms.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/name/postscript_name_consistency>

Check name table for empty records.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/name/empty_records>

Description strings in the name table must not contain copyright info.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/no_copyright_on_description>

Does full font name begin with the font family name?

Check ID: <FontBakeryCheck:com.google.fonts/check/name/match_familyname_fullfont>

The variable font 'wght' (Weight) axis coordinate must be 400 on the 'Regular' instance.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/regular_wght_coord>

The variable font 'wdth' (Width) axis coordinate must be 100 on the 'Regular' instance.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/regular_wdth_coord>

The variable font 'slnt' (Slant) axis coordinate must be zero on the 'Regular' instance.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/regular_slnt_coord>

The variable font 'ital' (Italic) axis coordinate must be zero on the 'Regular' instance.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/regular_ital_coord>

The variable font 'opsz' (Optical Size) axis coordinate should be between 10 and 16 on the 'Regular' instance.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/regular_opsz_coord>

The variable font 'slnt' (Slant) axis coordinate specifies positive values in its range?

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/slnt_range>

The variable font 'ital' (Italic) axis coordinates is in a valid range?

Check ID: <FontBakeryCheck:com.typenetwork/check/varfont/ital_range>

The variable font 'wght' (Weight) axis coordinate must be within spec range of 1 to 1000 on all instances.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/wght_valid_range>

The variable font 'wdth' (Width) axis coordinate must strictly greater than zero.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/wdth_valid_range>

All fvar axes have a correspondent Axis Record on STAT table?

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/stat_axis_record_for_each_axis>

Does the number of glyphs in the loca table match the maxp table?

Check ID: <FontBakeryCheck:com.google.fonts/check/loca/maxp_num_glyphs>

EXPERIMENTAL CHECK - Since 2024/Jun/20
Does the font's CFF table top dict strings fit into the ASCII range?

Check ID: <FontBakeryCheck:com.adobe.fonts/check/cff_ascii_strings>

Is the CFF subr/gsubr call depth > 10?

Check ID: <FontBakeryCheck:com.adobe.fonts/check/cff_call_depth>

Does the font use deprecated CFF operators or operations?

Check ID: <FontBakeryCheck:com.adobe.fonts/check/cff_deprecated_operators>

Is the CFF2 subr/gsubr call depth > 10?

Check ID: <FontBakeryCheck:com.adobe.fonts/check/cff2_call_depth>

Checking font version fields (head and name table).

Check ID: <FontBakeryCheck:com.google.fonts/check/font_version>

Font has correct post table version?

Check ID: <FontBakeryCheck:com.google.fonts/check/post_table_version>

Checking correctness of monospaced metadata.

Check ID: <FontBakeryCheck:com.google.fonts/check/monospace>

Check if OS/2 xAvgCharWidth is correct.

Check ID: <FontBakeryCheck:com.google.fonts/check/xavgcharwidth>

Check if OS/2 fsSelection matches head macStyle bold and italic bits.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/fsselection_matches_macstyle>

Checking unitsPerEm value is reasonable.

Check ID: <FontBakeryCheck:com.google.fonts/check/unitsperem>

Does the font have a DSIG table?

Check ID: <FontBakeryCheck:com.google.fonts/check/dsig>

Check glyphs in mark glyph class are non-spacing.

Check ID: <FontBakeryCheck:com.google.fonts/check/gdef_spacing_marks>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
The following spacing glyphs may be in the GDEF mark glyph class by mistake: aavowelsigntamil (U+0BBE), anusvaratamil (U+0B82), aulengthmarktamil (U+0BD7), ivowelsign1tamil (unencoded), ivowelsign2tamil (unencoded), ivowelsign3tamil (unencoded), ivowelsign4tamil (unencoded), ivowelsigntamil (U+0BBF), u11303 (U+11303), uuvowelsignalttamil (unencoded), uuvowelsigntamil (U+0BC2), uvowelsignalttamil (unencoded) and uvowelsigntamil (U+0BC1)
[code: spacing-mark-glyphs]

Check mark characters are in GDEF mark glyph class.

Check ID: <FontBakeryCheck:com.google.fonts/check/gdef_mark_chars>

Check GDEF mark glyph class doesn't have characters that are not marks.

Check ID: <FontBakeryCheck:com.google.fonts/check/gdef_non_mark_chars>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
The following non-mark characters should not be in the GDEF mark glyph class: U+0BBE, U+0BBF, U+0BC1, U+0BC2, U+0BD7 and U+11303
[code: non-mark-chars]

Does GPOS table have kerning information? This check skips monospaced fonts as defined by post.isFixedPitch value

Check ID: <FontBakeryCheck:com.google.fonts/check/gpos_kerning_info>

Is there a usable "kern" table declared in the font?

Check ID: <FontBakeryCheck:com.google.fonts/check/kern_table>

Is there any unused data at the end of the glyf table?

Check ID: <FontBakeryCheck:com.google.fonts/check/glyf_unused_data>

Font follows the family naming recommendations?

Check ID: <FontBakeryCheck:com.google.fonts/check/family_naming_recommendations>

MaxAdvanceWidth is consistent with values in the Hmtx and Hhea tables?

Check ID: <FontBakeryCheck:com.google.fonts/check/maxadvancewidth>

PostScript name follows OpenType specification requirements?

Check ID: <FontBakeryCheck:com.adobe.fonts/check/postscript_name>

Check for points out of bounds.

Check ID: <FontBakeryCheck:com.google.fonts/check/points_out_of_bounds>

Check glyphs do not have duplicate components which have the same x,y coordinates.

Check ID: <FontBakeryCheck:com.google.fonts/check/glyf_non_transformed_duplicate_components>

Check code page character ranges

Check ID: <FontBakeryCheck:com.google.fonts/check/code_pages>

Does the font have any invalid feature tags?

Check ID: <FontBakeryCheck:com.google.fonts/check/layout_valid_feature_tags>

Does the font have any invalid script tags?

Check ID: <FontBakeryCheck:com.google.fonts/check/layout_valid_script_tags>

Does the font have any invalid language tags?

Check ID: <FontBakeryCheck:com.google.fonts/check/layout_valid_language_tags>

Checking post.italicAngle value.

Check ID: <FontBakeryCheck:com.google.fonts/check/italic_angle>

Checking head.macStyle value.

Check ID: <FontBakeryCheck:com.google.fonts/check/mac_style>

Checking OS/2 fsSelection value.

Check ID: <FontBakeryCheck:com.google.fonts/check/fsselection>

Check name table IDs 1, 2, 16, 17 to conform to Italic style.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/italic_names>

Validates that the value of axisNameID used by each VariationAxisRecord is greater than 255 and less than 32768.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/varfont/valid_axis_nameid>

Validates that the value of subfamilyNameID used by each InstanceRecord is 2, 17, or greater than 255 and less than 32768.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/varfont/valid_subfamily_nameid>

Validates that the value of postScriptNameID used by each InstanceRecord is 6, 0xFFFF, or greater than 255 and less than 32768.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/varfont/valid_postscript_nameid>

Validates that when an instance record is included for the default instance, its subfamilyNameID value is set to a name ID whose string is equal to the string of either name ID 2 or 17, and its postScriptNameID value is set to a name ID whose string is equal to the string of name ID 6.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/varfont/valid_default_instance_nameids>

Validates that all of the instance records in a given font have the same size.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/varfont/same_size_instance_records>

Validates that all of the instance records in a given font have distinct data.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/varfont/distinct_instance_records>

Validate foundry-defined design-variation axis tag names.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/varfont/foundry_defined_tag_name>

Check that family axis ranges are indentical

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/family_axis_ranges>

STAT table has Axis Value tables?

Check ID: <FontBakeryCheck:com.adobe.fonts/check/stat_has_axis_value_tables>

Checking OS/2 achVendID against configuration.

Check ID: <FontBakeryCheck:com.thetypefounders/check/vendor_id>

Check hhea.caretSlopeRise and hhea.caretSlopeRun

Check ID: <FontBakeryCheck:com.google.fonts/check/caret_slope>

Ensure VFs have 'ital' STAT axis.

Check ID: <FontBakeryCheck:com.google.fonts/check/italic_axis_in_stat>

Ensure 'ital' STAT axis is boolean value

Check ID: <FontBakeryCheck:com.google.fonts/check/italic_axis_in_stat_is_boolean>

Ensure 'ital' STAT axis is last.

Check ID: <FontBakeryCheck:com.google.fonts/check/italic_axis_last>

Universal Profile Checks

🔥🔥🔥⚠️⚠️⚠️⏩⏩⏩⏩⏩ℹ️

Check accent of Lcaron, dcaron, lcaron, tcaron

Check ID: <FontBakeryCheck:com.google.fonts/check/alt_caron>

Check that glyph for U+0675 ARABIC LETTER HIGH HAMZA is not a mark.

Check ID: <FontBakeryCheck:com.google.fonts/check/arabic_high_hamza>

Check that Arabic spacing symbols U+FBB2–FBC1 aren't classified as marks.

Check ID: <FontBakeryCheck:com.google.fonts/check/arabic_spacing_symbols>

Ensure the font supports case swapping for all its glyphs.

Check ID: <FontBakeryCheck:com.google.fonts/check/case_mapping>

Does the font contain chws and vchw features?

Check ID: <FontBakeryCheck:com.google.fonts/check/cjk_chws_feature>

Check if each glyph has the recommended amount of contours.

Check ID: <FontBakeryCheck:com.google.fonts/check/contour_count>

Checking all files are in the same directory.

Check ID: <FontBakeryCheck:com.google.fonts/check/family/single_directory>

Each font in a family must have the same set of vertical metrics values.

Check ID: <FontBakeryCheck:com.google.fonts/check/family/vertical_metrics>

Checking OS/2 usWinAscent & usWinDescent.

Check ID: <FontBakeryCheck:com.google.fonts/check/family/win_ascent_and_descent>

🔥 NotoSansTamil[wdth,wght].ttf

🔥 FAIL
OS/2.usWinAscent value should be equal or greater than 995, but got 870 instead
[code: ascent]

Do we have the latest version of FontBakery installed?

Check ID: <FontBakeryCheck:com.google.fonts/check/fontbakery_version>

Ensure that the font can be rasterized by FreeType.

Check ID: <FontBakeryCheck:com.adobe.fonts/check/freetype_rasterizer>

Ensure no GPOS7 lookups are present.

Check ID: <FontBakeryCheck:com.google.fonts/check/gpos7>

EXPERIMENTAL CHECK - Since 2024/Jun/10
Ensure 'smcp' (small caps) lookups are defined before ligature lookups in the 'GSUB' table.

Check ID: <FontBakeryCheck:com.google.fonts/check/gsub/smallcaps_before_ligatures>

Detect any interpolation issues in the font.

Check ID: <FontBakeryCheck:com.google.fonts/check/interpolation_issues>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN

Interpolation issues were found in the font:

- Contour 0 point 111 in glyph 'jatamil' has a kink between location wght=100,wdth=100 and location wght=704,wdth=100

- Contour 0 point 179 in glyph 'jatamil' has a kink between location wght=100,wdth=100 and location wght=704,wdth=100

- Contour 0 point 56 in glyph 'aitamil' has a kink between location wght=100,wdth=100 and location wght=704,wdth=100

[code: interpolation-issues]

Check that legacy accents aren't used in composite glyphs.

Check ID: <FontBakeryCheck:com.google.fonts/check/legacy_accents>

Checking Vertical Metric Linegaps.

Check ID: <FontBakeryCheck:com.google.fonts/check/linegaps>

Font contains '.notdef' as its first glyph?

Check ID: <FontBakeryCheck:com.google.fonts/check/mandatory_glyphs>

Check math signs have the same width.

Check ID: <FontBakeryCheck:com.google.fonts/check/math_signs_width>

Name table records must not have trailing spaces.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/trailing_spaces>

Checking OS/2 Metrics match hhea Metrics.

Check ID: <FontBakeryCheck:com.google.fonts/check/os2_metrics_match_hhea>

Checking with ots-sanitize.

Check ID: <FontBakeryCheck:com.google.fonts/check/ots>

Font contains all required tables?

Check ID: <FontBakeryCheck:com.google.fonts/check/required_tables>

Ensure indic fonts have the Indian Rupee Sign glyph.

Check ID: <FontBakeryCheck:com.google.fonts/check/rupee>

Font has the proper sfntVersion value?

Check ID: <FontBakeryCheck:com.adobe.fonts/check/sfnt_version>

Does the font contain a soft hyphen?

Check ID: <FontBakeryCheck:com.google.fonts/check/soft_hyphen>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
This font has a 'Soft Hyphen' character.
[code: softhyphen]

Checking STAT table entries in static fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/STAT_in_statics>

Check correctness of STAT table strings

Check ID: <FontBakeryCheck:com.google.fonts/check/STAT_strings>

EXPERIMENTAL CHECK - Since 2024/Jun/04
Check tabular widths don't have kerning.

Check ID: <FontBakeryCheck:com.google.fonts/check/tabular_kerning>

Ensure component transforms do not perform scaling or rotation.

Check ID: <FontBakeryCheck:com.google.fonts/check/transformed_components>

EXPERIMENTAL CHECK - Since 2024/Jul/17
Checking that the typoAscender exceeds the yMax of the /Agrave.

Check ID: <FontBakeryCheck:com.arrowtype.fonts/check/typoascender_exceeds_Agrave>

🔥 NotoSansTamil[wdth,wght].ttf

🔥 FAIL
OS/2.sTypoAscender value should be greater than 944, but got 870 instead
[code: typoAscender]

Font contains unique glyph names?

Check ID: <FontBakeryCheck:com.google.fonts/check/unique_glyphnames>

Check font contains no unreachable glyphs

Check ID: <FontBakeryCheck:com.google.fonts/check/unreachable_glyphs>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN

The following glyphs could not be reached by codepoint or substitution rules:

- asciicircum

- asciitilde

- asterisk

- backslash

- bar

- braceleft

- braceright

- bracketleft

- bracketright

- colon

- comma

- divide

- eight

- ellipsis

- emdash

- endash

- equal

- exclam

- five

- four

- greater

- hyphen

- less

- minus

- multiply

- nine

- numbersign

- one

- parenleft

- parenright

- percent

- plus

- question

- quotedbl

- quotedblleft

- quotesingle

- semicolon

- seven

- six

- slash

- three

- two

- underscore

- uni00A0

- zero

[code: unreachable-glyphs]

Are there unwanted tables?

Check ID: <FontBakeryCheck:com.google.fonts/check/unwanted_tables>

Glyph names are all valid?

Check ID: <FontBakeryCheck:com.google.fonts/check/valid_glyphnames>

Font has proper whitespace glyph names?

Check ID: <FontBakeryCheck:com.google.fonts/check/whitespace_glyphnames>

🔥 NotoSansTamil[wdth,wght].ttf

🔥 FAIL
Glyph 0x00A0 is called "uni00A0.tamil": Change to "uni00A0"
[code: non-compliant-00a0]

Font contains glyphs for whitespace characters?

Check ID: <FontBakeryCheck:com.google.fonts/check/whitespace_glyphs>

Whitespace glyphs have ink?

Check ID: <FontBakeryCheck:com.google.fonts/check/whitespace_ink>

Space and non-breaking space have the same width?

Check ID: <FontBakeryCheck:com.google.fonts/check/whitespace_widths>

Article Checks

⚠️

Validate size, and resolution of article images, and ensure article page has minimum length and includes visual assets.

Check ID: <FontBakeryCheck:com.google.fonts/check/article/images>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
Article page lacks visual assets.
[code: missing-visual-asset]
✅ PASS
ok

Metadata Checks

⚠️⏩⏩⏩ℹ️

Does METADATA.pb copyright field contain broken links?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/broken_links>

METADATA.pb: Font styles are named canonically?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/canonical_style_names>

METADATA.pb: Check that font weight has a canonical value.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/canonical_weight_value>

Check samples can be rendered.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/can_render_samples>

Ensure METADATA.pb category field is valid.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/category>

Check if category on METADATA.pb matches what can be inferred from the family name.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/category_hints>

Validate VF axes match the ones declared on METADATA.pb.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/consistent_axis_enumeration>

METADATA.pb: Check URL on copyright string is the same as in repository_url field.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/consistent_repo_urls>

METADATA.pb: Copyright notice is the same in all fonts?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/copyright>

EXPERIMENTAL CHECK - Since 2024/May/22
Validate 'date_added' field on METADATA.pb.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/date_added>

METADATA.pb: Designers are listed correctly on the Google Fonts catalog?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/designer_profiles>

Multiple values in font designer field in METADATA.pb must be separated by commas.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/designer_values>

At least one designer is declared in METADATA.pb

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/empty_designer>

Ensure METADATA.pb does not use escaped strings.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/escaped_strings>

Check font family directory name.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/family_directory_name>

Check that METADATA.pb family values are all the same.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/familyname>

METADATA.pb: Font filenames match font.filename entries?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/filenames>

Validate METADATA.pb axes values are within gf_axisregistry bounds.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/gf_axisregistry_bounds>

Validate METADATA.pb axes tags are defined in gf_axisregistry.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/gf_axisregistry_valid_tags>

Ensure there is a regular style defined in METADATA.pb.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/has_regular>

Check METADATA.pb includes production subsets.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/includes_production_subsets>

Check METADATA.pb file only contains a single CJK subset.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/single_cjk_subset>

METADATA.pb license is "APACHE2", "UFL" or "OFL"?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/license>

METADATA.pb font.filename and font.post_script_name fields have equivalent values?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/match_filename_postscript>

METADATA.pb font.full_name and font.post_script_name fields have equivalent values ?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/match_fullname_postscript>

METADATA.pb: Check font name is the same as family name.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/match_name_familyname>

METADATA.pb weight matches postScriptName for static fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/match_weight_postscript>

METADATA.pb should contain at least "menu" and "latin" subsets.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/menu_and_latin>

METADATA.pb: Validate family.minisite_url field.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/minisite_url>

METADATA.pb font.name and font.full_name fields match the values declared on the name table?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/nameid/family_and_full_names>

METADATA.pb font.name value should be same as the family name declared on the name table.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/nameid/font_name>

Checks METADATA.pb font.post_script_name matches postscript name declared on the name table.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/nameid/post_script_name>

Check METADATA.pb font weights are correct.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/os2_weightclass>

Check METADATA.pb parse correctly.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/parses>

METADATA.pb: Check for primary_script

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/primary_script>

METADATA.pb: Regular should be 400.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/regular_is_400>

Copyright notice on METADATA.pb should not contain 'Reserved Font Name'.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/reserved_font_name>

METADATA.pb subsets should be alphabetically ordered.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/subsets_order>

Ensure METADATA.pb lists all font binaries.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/undeclared_fonts>

METADATA.pb: check if fonts field only has unique "full_name" values.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/unique_full_name_values>

METADATA.pb: check if fonts field only contains unique style:weight pairs.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/unique_weight_style_pairs>

Check for codepoints not covered by METADATA subsets.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/unreachable_subsetting>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
The following codepoints supported by the font are not covered by any subsets defined in the font's metadata file, and will never be served. You can solve this by either manually adding additional subset declarations to METADATA.pb, or by editing the glyphset definitions.
- U+02C7 CARON: try adding one of: canadian-aboriginal, yi, tifinagh
- U+02C9 MODIFIER LETTER MACRON: not included in any glyphset definition
- U+02D8 BREVE: try adding one of: canadian-aboriginal, yi
- U+02D9 DOT ABOVE: try adding one of: canadian-aboriginal, yi
- U+02DB OGONEK: try adding one of: canadian-aboriginal, yi
- U+02DD DOUBLE ACUTE ACCENT: not included in any glyphset definition
- U+0302 COMBINING CIRCUMFLEX ACCENT: try adding one of: coptic, tifinagh, cherokee, math
- U+0306 COMBINING BREVE: try adding one of: tifinagh, old-permic
- U+0307 COMBINING DOT ABOVE: try adding one of: tifinagh, math, syriac, old-permic, canadian-aboriginal, coptic, malayalam, tai-le
- U+030A COMBINING RING ABOVE: try adding syriac
- U+030B COMBINING DOUBLE ACUTE ACCENT: try adding one of: cherokee, osage
- U+030C COMBINING CARON: try adding one of: cherokee, tai-le
- U+0312 COMBINING TURNED COMMA ABOVE: not included in any glyphset definition
- U+0326 COMBINING COMMA BELOW: not included in any glyphset definition
- U+0327 COMBINING CEDILLA: not included in any glyphset definition
- U+0328 COMBINING OGONEK: not included in any glyphset definition
- U+0951 DEVANAGARI STRESS SIGN UDATTA: try adding one of: gurmukhi, devanagari, gujarati, tirhuta, sharada, oriya, kannada, grantha, bengali, telugu, malayalam
- U+0952 DEVANAGARI STRESS SIGN ANUDATTA: try adding one of: gurmukhi, devanagari, gujarati, tirhuta, oriya, kannada, grantha, bengali, telugu, malayalam
- U+1CDA VEDIC TONE DOUBLE SVARITA: try adding one of: devanagari, oriya, kannada, malayalam, telugu
- U+2010 HYPHEN: try adding one of: lisu, armenian, kaithi, sora-sompeng, yi, kharoshthi, arabic, kayah-li, sundanese, syloti-nagri, coptic, cham, hebrew
- U+2082 SUBSCRIPT TWO: not included in any glyphset definition
- U+2083 SUBSCRIPT THREE: not included in any glyphset definition
- U+2084 SUBSCRIPT FOUR: not included in any glyphset definition
- U+A8F3 DEVANAGARI SIGN CANDRABINDU VIRAMA: try adding devanagari
- U+11301 GRANTHA SIGN CANDRABINDU: try adding grantha
- U+11303 GRANTHA SIGN VISARGA: try adding grantha
- U+1133B COMBINING BINDU BELOW: try adding grantha
- U+1133C GRANTHA SIGN NUKTA: try adding grantha
Or you can add the above codepoints to one of the subsets supported by the font: latin, latin-ext, menu, tamil
[code: unreachable-subsetting]

Check for METADATA subsets with zero support.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/unsupported_subsets>

METADATA.pb font.filename field contains font name in right format?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/valid_filename_values>

METADATA.pb font.full_name field contains font name in right format?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/valid_full_name_values>

Check name ID 25 to end with "Italic" for Italic VFs.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/valid_nameid25>

METADATA.pb font.post_script_name field contains font name in right format?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/valid_post_script_name_values>

Glyphset Checks

🔥

Shapes languages in all GF glyphsets.

Check ID: <FontBakeryCheck:com.google.fonts/check/glyphsets/shape_languages>

🔥 NotoSansTamil[wdth,wght].ttf

🔥 FAIL
GF_Latin_Core glyphset:

Language FAIL messages

nl_Latn (Dutch) Shaper didn't attach acutecomb to j

^ Shaper didn't attach acutecomb to J

[code: failed-language-shaping]

Language	FAIL messages
nl_Latn (Dutch)	Shaper didn't attach acutecomb to j
^	Shaper didn't attach acutecomb to J

Description Checks

🔥🔥⚠️⏩

Does DESCRIPTION file contain broken links?

Check ID: <FontBakeryCheck:com.google.fonts/check/description/broken_links>

🔥 NotoSansTamil[wdth,wght].ttf

🔥 FAIL
The following links are broken in the article file: https://scriptsource.org/scr/Taml (status code: 403)
[code: broken-links]

DESCRIPTION.en_us.html should end in a linebreak.

Check ID: <FontBakeryCheck:com.google.fonts/check/description/eof_linebreak>

⚠️ METADATA.pb

⚠️ WARN
The last characther on DESCRIPTION.en_us.html is not a line-break. Please add it.
[code: missing-eof-linebreak]

On a family update, the DESCRIPTION.en_us.html file should ideally also be updated.

Check ID: <FontBakeryCheck:com.google.fonts/check/description/family_update>

Does DESCRIPTION file contain a upstream Git repo URL?

Check ID: <FontBakeryCheck:com.google.fonts/check/description/git_url>

Check the description doesn't contain unsupported html elements

Check ID: <FontBakeryCheck:com.google.fonts/check/description/has_unsupported_elements>

DESCRIPTION.en_us.html must have more than 200 bytes.

Check ID: <FontBakeryCheck:com.google.fonts/check/description/min_length>

🔥 METADATA.pb

🔥 FAIL
DESCRIPTION.en_us.html must have size larger than 200 bytes.
[code: too-short]

Check for presence of an ARTICLE.en_us.html file

Check ID: <FontBakeryCheck:com.google.fonts/check/description/has_article>

URLs on DESCRIPTION file must not display http(s) prefix.

Check ID: <FontBakeryCheck:com.google.fonts/check/description/urls>

Is this a proper HTML snippet?

Check ID: <FontBakeryCheck:com.google.fonts/check/description/valid_html>

Name table checks

⚠️⏩

Combined length of family and style must not exceed 32 characters.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/family_and_style_max_length>

Check family name for GF Guide compliance.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/family_name_compliance>

Check copyright namerecords match license file.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/license>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
Please consider updating the url from 'https://scripts.sil.org/OFL' to 'https://openfontlicense.org'.
[code: old-url]

License URL matches License text on name table?

Check ID: <FontBakeryCheck:com.google.fonts/check/name/license_url>

Name table entries should not contain line-breaks.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/line_breaks>

Name table strings must not contain the string 'Reserved Font Name'.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/rfn>

Substitute copyright, registered and trademark symbols in name table entries.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/unwanted_chars>

Shaping Checks

⚠️⏩⏩⏩

Check that texts shape as per expectation

Check ID: <FontBakeryCheck:com.google.fonts/check/shaping/regression>

Check that no forbidden glyphs are found while shaping

Check ID: <FontBakeryCheck:com.google.fonts/check/shaping/forbidden>

Check that no collisions are found while shaping

Check ID: <FontBakeryCheck:com.google.fonts/check/shaping/collides>

Ensure dotted circle glyph is present and can attach marks.

Check ID: <FontBakeryCheck:com.google.fonts/check/dotted_circle>

Ensure soft_dotted characters lose their dot when combined with marks that replace the dot.

Check ID: <FontBakeryCheck:com.google.fonts/check/soft_dotted>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
The dot of soft dotted characters used in orthographies must disappear in the following strings: i̊ i̋ j̀ j́ j̃ j̄ j̈ į̀ į́ į̂ į̃ į̄ į̌

The dot of soft dotted characters should disappear in other cases, for example: ĩ ĭ i̇ ǐ i̒ ĩ̦ ĭ̦ i̦̇ i̦̊ i̦̋ ǐ̦ i̦̒ ĩ̧ ĭ̧ i̧̇ i̧̊ i̧̋ ǐ̧ i̧̒ ĵ

Your font fully covers the following languages that require the soft-dotted feature: Lithuanian (Latn, 2,357,094 speakers).

Your font does not cover the following languages that require the soft-dotted feature: Belarusian (Cyrl, 10,064,517 speakers), Dii (Latn, 71,000 speakers), Yala (Latn, 200,000 speakers), Vute (Latn, 21,000 speakers), Fur (Latn, 1,230,163 speakers), Ngbaka (Latn, 1,020,000 speakers), Cicipu (Latn, 44,000 speakers), Ijo, Southeast (Latn, 2,471,000 speakers), Dutch (Latn, 31,709,104 speakers), Ejagham (Latn, 120,000 speakers), Bete-Bendi (Latn, 100,000 speakers), Lugbara (Latn, 2,200,000 speakers), Nateni (Latn, 100,000 speakers), Kpelle, Guinea (Latn, 622,000 speakers), Ebira (Latn, 2,200,000 speakers), Koonzime (Latn, 40,000 speakers), Mfumte (Latn, 79,000 speakers), Kom (Latn, 360,685 speakers), Avokaya (Latn, 100,000 speakers), Igbo (Latn, 27,823,640 speakers), Ukrainian (Cyrl, 29,273,587 speakers), Ekpeye (Latn, 226,000 speakers), Navajo (Latn, 166,319 speakers), Zapotec (Latn, 490,000 speakers), Southern Kisi (Latn, 360,000 speakers), Sar (Latn, 500,000 speakers), Basaa (Latn, 332,940 speakers), South Central Banda (Latn, 244,000 speakers), Bafut (Latn, 158,146 speakers), Dan (Latn, 1,099,244 speakers), Gulay (Latn, 250,478 speakers), Mango (Latn, 77,000 speakers), Mundani (Latn, 34,000 speakers), Nzakara (Latn, 50,000 speakers), Ma’di (Latn, 584,000 speakers), Aghem (Latn, 38,843 speakers), Makaa (Latn, 221,000 speakers).
[code: soft-dotted]

Font File Checks

⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩ℹ️ℹ️ℹ️ℹ️ℹ️

Are there unwanted Apple tables?

Check ID: <FontBakeryCheck:com.google.fonts/check/aat>

Checking file is named canonically.

Check ID: <FontBakeryCheck:com.google.fonts/check/canonical_filename>

Does the font contain less than 150 CJK characters?

Check ID: <FontBakeryCheck:com.google.fonts/check/cjk_not_enough_glyphs>

Check font follows the Google Fonts CJK vertical metric schema

Check ID: <FontBakeryCheck:com.google.fonts/check/cjk_vertical_metrics>

Check if the vertical metrics of a CJK family are similar to the same family hosted on Google Fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/cjk_vertical_metrics_regressions>

Color layers should have a minimum brightness

Check ID: <FontBakeryCheck:com.google.fonts/check/color_cpal_brightness>

Check font has the expected color font tables.

Check ID: <FontBakeryCheck:com.google.fonts/check/colorfont_tables>

Put an empty glyph on GID 1 right after the .notdef glyph for COLRv0 fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/empty_glyph_on_gid1_for_colrv0>

EPAR table present in font?

Check ID: <FontBakeryCheck:com.google.fonts/check/epar>

Ensure files are not too large.

Check ID: <FontBakeryCheck:com.google.fonts/check/file_size>

Copyright notices match canonical pattern in fonts

Check ID: <FontBakeryCheck:com.google.fonts/check/font_copyright>

Check font names are correct

Check ID: <FontBakeryCheck:com.google.fonts/check/font_names>

Checking OS/2 fsType does not impose restrictions.

Check ID: <FontBakeryCheck:com.google.fonts/check/fstype>

Check variable font instances

Check ID: <FontBakeryCheck:com.google.fonts/check/fvar_instances>

All name entries referenced by fvar instances exist on the name table?

Check ID: <FontBakeryCheck:com.google.fonts/check/fvar_name_entries>

Is the Grid-fitting and Scan-conversion Procedure ('gasp') table set to optimize rendering?

Check ID: <FontBakeryCheck:com.google.fonts/check/gasp>

Validate defaults on fvar table match registered fallback names in GFAxisRegistry.

Check ID: <FontBakeryCheck:com.google.fonts/check/gf_axisregistry/fvar_axis_defaults>

Check glyphs do not have components which are themselves components.

Check ID: <FontBakeryCheck:com.google.fonts/check/glyf_nested_components>

Check Google Fonts glyph coverage.

Check ID: <FontBakeryCheck:com.google.fonts/check/glyph_coverage>

Font has ttfautohint params?

Check ID: <FontBakeryCheck:com.google.fonts/check/has_ttfautohint_params>

Show hinting filesize impact.

Check ID: <FontBakeryCheck:com.google.fonts/check/hinting_impact>

PPEM must be an integer on hinted fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/integer_ppem_if_hinted>

Is there kerning info for non-ligated sequences?

Check ID: <FontBakeryCheck:com.google.fonts/check/kerning_for_non_ligated_sequences>

Are there caret positions declared for every ligature?

Check ID: <FontBakeryCheck:com.google.fonts/check/ligature_carets>

Ensure variable fonts include an avar table.

Check ID: <FontBakeryCheck:com.google.fonts/check/mandatory_avar_table>

Ensure fonts have ScriptLangTags declared on the 'meta' table.

Check ID: <FontBakeryCheck:com.google.fonts/check/meta/script_lang_tags>

⚠️ NotoSansTamil[wdth,wght].ttf

⚠️ WARN
This font file does not have a 'meta' table.
[code: lacks-meta-table]

Check small caps glyphs are available.

Check ID: <FontBakeryCheck:com.google.fonts/check/missing_small_caps_glyphs>

Are there non-ASCII characters in ASCII-only NAME table entries?

Check ID: <FontBakeryCheck:com.google.fonts/check/name/ascii_only_entries>

Description strings in the name table must not exceed 200 characters.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/description_max_length>

Make sure family name does not begin with a digit.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/familyname_first_char>

Font has all mandatory 'name' table entries?

Check ID: <FontBakeryCheck:com.google.fonts/check/name/mandatory_entries>

Version format is correct in 'name' table?

Check ID: <FontBakeryCheck:com.google.fonts/check/name/version_format>

Ensure fonts do not contain any pre-production tables.

Check ID: <FontBakeryCheck:com.google.fonts/check/no_debugging_tables>

Font has old ttfautohint applied?

Check ID: <FontBakeryCheck:com.google.fonts/check/old_ttfautohint>

OS/2.fsSelection bit 7 (USE_TYPO_METRICS) is set in all fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/os2/use_typo_metrics>

Check font can render its own name.

Check ID: <FontBakeryCheck:com.google.fonts/check/render_own_name>

Checking direction of slnt axis angles

Check ID: <FontBakeryCheck:com.google.fonts/check/slant_direction>

Font enables smart dropout control in "prep" table instructions?

Check ID: <FontBakeryCheck:com.google.fonts/check/smart_dropout>

Check axis ordering on the STAT table.

Check ID: <FontBakeryCheck:com.google.fonts/check/STAT/axis_order>

Validate STAT particle names and values match the fallback names in GFAxisRegistry.

Check ID: <FontBakeryCheck:com.google.fonts/check/STAT/gf_axisregistry>

Ensure Stylistic Sets have description.

Check ID: <FontBakeryCheck:com.google.fonts/check/stylisticset_description>

Stricter unitsPerEm criteria for Google Fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/unitsperem_strict>

Check the OS/2 usWeightClass is appropriate for the font's best SubFamily name.

Check ID: <FontBakeryCheck:com.google.fonts/check/usweightclass>

The variable font 'wght' (Weight) axis coordinate must be 700 on the 'Bold' instance.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/bold_wght_coord>

Ensure that all variable font files have the same set of axes and axis ranges.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/consistent_axes>

Ensure VFs with duplexed axes do not vary horizontal advance.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/duplexed_axis_reflow>

Check variable font instances don't have duplicate names

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont_duplicate_instance_names>

Check a static ttf can be generated from a variable font.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/generate_static>

EXPERIMENTAL CHECK - Since 2024/Mar/27
Ensure the font's instances are in the correct order.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/instances_in_order>

Check that variable fonts have an HVAR table.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/has_HVAR>

Ensure VFs do not contain the ital axis.

Check ID: <FontBakeryCheck:com.google.fonts/check/varfont/unsupported_axes>

Checking OS/2 achVendID.

Check ID: <FontBakeryCheck:com.google.fonts/check/vendor_id>

Check font follows the Google Fonts vertical metric schema

Check ID: <FontBakeryCheck:com.google.fonts/check/vertical_metrics>

Check if the vertical metrics of a family are similar to the same family hosted on Google Fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/vertical_metrics_regressions>

There must not be VTT Talk sources in the font.

Check ID: <FontBakeryCheck:com.google.fonts/check/vttclean>

Summary

OpenType Specification Checks

Fonts have consistent underline thickness?

Fonts have consistent PANOSE family type?

Make sure all font files have the same version value.

Check that OS/2.fsSelection bold & italic settings are unique for each NameID1

Verify that each group of fonts with the same nameID 1 has maximum of 4 fonts.

Verify that family names in the name table are consistent across all fonts in the family. Checks Typographic Family name (nameID 16) if present, otherwise uses Font Family name (nameID 1)

CFF table FontName must match name table ID 6 (PostScript name).

Name table ID 6 (PostScript name) must be consistent across platforms.

Check name table for empty records.

Description strings in the name table must not contain copyright info.

Does full font name begin with the font family name?

The variable font 'wght' (Weight) axis coordinate must be 400 on the 'Regular' instance.

The variable font 'wdth' (Width) axis coordinate must be 100 on the 'Regular' instance.

The variable font 'slnt' (Slant) axis coordinate must be zero on the 'Regular' instance.

The variable font 'ital' (Italic) axis coordinate must be zero on the 'Regular' instance.

The variable font 'opsz' (Optical Size) axis coordinate should be between 10 and 16 on the 'Regular' instance.

The variable font 'slnt' (Slant) axis coordinate specifies positive values in its range?

The variable font 'ital' (Italic) axis coordinates is in a valid range?

The variable font 'wght' (Weight) axis coordinate must be within spec range of 1 to 1000 on all instances.

The variable font 'wdth' (Width) axis coordinate must strictly greater than zero.

All fvar axes have a correspondent Axis Record on STAT table?

Does the number of glyphs in the loca table match the maxp table?

EXPERIMENTAL CHECK - Since 2024/Jun/20 Does the font's CFF table top dict strings fit into the ASCII range?

Is the CFF subr/gsubr call depth > 10?

Does the font use deprecated CFF operators or operations?

Is the CFF2 subr/gsubr call depth > 10?

Checking font version fields (head and name table).

Font has correct post table version?

Checking correctness of monospaced metadata.

Check if OS/2 xAvgCharWidth is correct.

Check if OS/2 fsSelection matches head macStyle bold and italic bits.

Checking unitsPerEm value is reasonable.

Does the font have a DSIG table?

Check glyphs in mark glyph class are non-spacing.

Check mark characters are in GDEF mark glyph class.

Check GDEF mark glyph class doesn't have characters that are not marks.

Does GPOS table have kerning information? This check skips monospaced fonts as defined by post.isFixedPitch value

Is there a usable "kern" table declared in the font?

Is there any unused data at the end of the glyf table?

Font follows the family naming recommendations?

MaxAdvanceWidth is consistent with values in the Hmtx and Hhea tables?

PostScript name follows OpenType specification requirements?

Check for points out of bounds.

Check glyphs do not have duplicate components which have the same x,y coordinates.

Check code page character ranges

Does the font have any invalid feature tags?

Does the font have any invalid script tags?

Does the font have any invalid language tags?

Checking post.italicAngle value.

Checking head.macStyle value.

Checking OS/2 fsSelection value.

Check name table IDs 1, 2, 16, 17 to conform to Italic style.

Validates that the value of axisNameID used by each VariationAxisRecord is greater than 255 and less than 32768.

Validates that the value of subfamilyNameID used by each InstanceRecord is 2, 17, or greater than 255 and less than 32768.

Validates that the value of postScriptNameID used by each InstanceRecord is 6, 0xFFFF, or greater than 255 and less than 32768.

Validates that when an instance record is included for the default instance, its subfamilyNameID value is set to a name ID whose string is equal to the string of either name ID 2 or 17, and its postScriptNameID value is set to a name ID whose string is equal to the string of name ID 6.

Validates that all of the instance records in a given font have the same size.

Validates that all of the instance records in a given font have distinct data.

Validate foundry-defined design-variation axis tag names.

Check that family axis ranges are indentical

STAT table has Axis Value tables?

Checking OS/2 achVendID against configuration.

Check hhea.caretSlopeRise and hhea.caretSlopeRun

Ensure VFs have 'ital' STAT axis.

Ensure 'ital' STAT axis is boolean value

Ensure 'ital' STAT axis is last.

Universal Profile Checks

Check accent of Lcaron, dcaron, lcaron, tcaron

Check that glyph for U+0675 ARABIC LETTER HIGH HAMZA is not a mark.

Check that Arabic spacing symbols U+FBB2–FBC1 aren't classified as marks.

Ensure the font supports case swapping for all its glyphs.

Does the font contain chws and vchw features?

Check if each glyph has the recommended amount of contours.

Checking all files are in the same directory.

Each font in a family must have the same set of vertical metrics values.

Checking OS/2 usWinAscent & usWinDescent.

Do we have the latest version of FontBakery installed?

Ensure that the font can be rasterized by FreeType.

EXPERIMENTAL CHECK - Since 2024/Jun/20
Does the font's CFF table top dict strings fit into the ASCII range?

EXPERIMENTAL CHECK - Since 2024/Jun/10
Ensure 'smcp' (small caps) lookups are defined before ligature lookups in the 'GSUB' table.

EXPERIMENTAL CHECK - Since 2024/Jun/04
Check tabular widths don't have kerning.

EXPERIMENTAL CHECK - Since 2024/Jul/17
Checking that the typoAscender exceeds the yMax of the /Agrave.

Font has proper whitespace glyph names?

EXPERIMENTAL CHECK - Since 2024/May/22
Validate 'date_added' field on METADATA.pb.