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Agent skill

Font Features

by glebis in glebis/claude-skills

This skill should be used when inspecting or applying advanced OpenType features of a font (woff2/otf/ttf) — ligatures, stylistic sets (ss01–ss20), character variants (cvXX), texture healing…

MITAuto-check passedFrontend & Design

Install Font Features

skills CLI
$ npx skills add glebis/claude-skills --skill font-features -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install glebis/claude-skills font-features --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/glebis/claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/font-features .claude/skills/font-features && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
font-features
GitHub stars
389
Token cost
~849 tokens
SKILL.md length
344 words
Files
2 (incl. scripts)
Skills in repo
91
Repo updated
First seen
Licence
MIT

At a glance

This skill should be used when inspecting or applying advanced OpenType features of a font (woff2/otf/ttf) — ligatures, stylistic sets (ss01–ss20), character variants (cvXX), texture healing…

  • Works in 4 steps: Inspect the actual font files in the… → Interview the user via cenno… → Generate CSS deterministically → …
  • OpenType features
  • SKILL.md covers Workflow and Gotchas
  • Runs Python scripts from its folder; calls python3 and pip

What it does

Font Features is an agent skill from glebis/claude-skills. This skill should be used when inspecting or applying advanced OpenType features of a font (woff2/otf/ttf) — ligatures, stylistic sets (ss01–ss20), character variants (cvXX), texture healing, slashed zero, tabular/oldstyle figures, fractions, small caps, case-sensitive forms — and generating the CSS to enable them. Interviews the user via cenno to pick features. Triggers on "OpenType features", "font features", "stylistic sets", "ligatures", "texture healing", "tabular figures", "what can this font do".

Its SKILL.md is about 850 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including scripts (for example `scripts/otfeat.py`).

It sits in Frontend & Design. The repository describes itself as: Collection of Claude Code skills for enhanced AI workflows. The licence is MIT.

When your agent uses it

  • OpenType features
  • Texture healing
  • Tabular figures
  • What can this font do

Example prompts

  • “OpenType features”
  • “font features”
  • “stylistic sets”
  • “/font-features”

Requirements

  • Python 3

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Inspect the actual font files in the project
  2. Interview the user via cenno (mcpcennoask_user, or ask_sequence for several questions). Offer ONLY features found in step 1, grouped…
  3. Generate CSS deterministically
  4. Apply: paste the block into the project stylesheet; scope per element role (e.g. tnum on tables/stat tiles only, ligature sets on code…

What it can do on your machine

Read from SKILL.md and the folder at commit 7524dff. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python3
    • pip

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Font Features loads about 849 tokens when it runs. Until then it costs about 131 tokens; SKILL.md has 344 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~131
When it runs · the whole SKILL.md, loaded when a task matches
~849

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from glebis/claude-skills at commit 7524dff, republished under its MIT licence (© glebis). 344 words, ~849 tokens.

Download SKILL.mdSave it as .claude/skills/font-features/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
font-features
description
This skill should be used when inspecting or applying advanced OpenType features of a font (woff2/otf/ttf) — ligatures, stylistic sets (ss01–ss20), character variants (cvXX), texture healing, slashed zero, tabular/oldstyle figures, fractions, small caps, case-sensitive forms — and generating the CSS to enable them. Interviews the user via cenno to pick features. Triggers on "OpenType features", "font features", "stylistic sets", "ligatures", "texture healing", "tabular figures", "what can this font do".

Font Features (OpenType → CSS)

Inspect a font's real OpenType feature inventory and generate CSS to enable chosen features. Never guess what a font supports — always run scripts/otfeat.py list first; only features present in the dump may be offered or enabled.

Requires fontTools (pip install fonttools if missing).

Workflow

  1. Inspect the actual font files in the project:

    bash
    python3 <skill-dir>/scripts/otfeat.py list path/to/Font-Regular.woff2 [more fonts...]

    Output lists each font's GSUB/GPOS tags with human descriptions (Monaspace stylistic sets are described precisely; unknown cvXX are labelled generically).

  2. Interview the user via cenno (mcp__cenno__ask_user, or ask_sequence for several questions). Offer ONLY features found in step 1, grouped sensibly, with a recommendation. Typical question set:

    • Coding ligatures: which sets? (arrows ss03, colons ss07, comparison ss02...) — for code samples only, usually off for prose
    • Numerals: tabular (tnum) for tables/timers, oldstyle (onum) for prose, slashed zero (zero)
    • Texture healing (calt) — for Monaspace, recommend ON everywhere
    • Caps: case for uppercase labels/buttons, smcp if present Use input: {kind: "choice"} with a text option, mark optional questions low-urgency, and respect a "skip" answer.

  3. Generate CSS deterministically:

    bash
    python3 <skill-dir>/scripts/otfeat.py css --family "Monaspace Neon" \
  --features calt,liga,tnum,case --class prose
# cvXX with a value: --features cv01=2

    High-level font-variant-* properties are preferred automatically (they cascade and combine better); remaining tags fall back to font-feature-settings. --no-variant-props forces the low-level form only.

  4. Apply: paste the block into the project stylesheet; scope per element role (e.g. tnum on tables/stat tiles only, ligature sets on code only). Verify in a browser with real content.

Show full SKILL.md (119 more words)Show less

Gotchas

  • font-feature-settings is all-or-nothing per declaration — a second declaration on a nested element REPLACES the inherited list; repeat the full list. This is the main reason to prefer font-variant-*.
  • CSS accepts any tag, browsers silently ignore ones the font lacks — which is why step 1 is mandatory (e.g. Monaspace has NO tnum/zero/smcp; it's a monospace family and zero is already slashed).
  • Stylistic-set meanings are font-specific; never reuse Monaspace's ss-descriptions for another family.
  • A feature tag being present does not mean it covers the glyphs assumed: dump the actual GSUB substitutions before writing demo copy (e.g. Monaspace's case only raises : ¡ ¿ ‽ and combining accents — NOT quotes, brackets, or dashes).
  • Texture healing needs calt AND ligatures left enabled; font-variant-ligatures: none kills it.

© glebis, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (scripts) in font-features of glebis/claude-skills.

  • SKILL.md
  • scripts/otfeat.py

Open the folder on GitHubat commit 7524dff

Compare with similar skills

Font Features next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Font Features compared with similar skills
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Font Features this skillglebis/claude-skills389—~849Automated safety check: PassMIT
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Impeccablebestofjs/bestofjs3.1k27 repos~2.6kAutomated safety check: PassMIT
Figma Design System Builderwarpdotdev/warp65k2 repos~4.4kAutomated safety check: PassAGPL-3.0
Web Interface Guidelines Reviewervercel-labs/openreview1.7k98 repos~308Automated safety check: PassNone

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Categories

Questions about Font Features

What does Font Features do?

This skill should be used when inspecting or applying advanced OpenType features of a font (woff2/otf/ttf) — ligatures, stylistic sets (ss01–ss20), character variants (cvXX), texture healing…. Font Features is an agent skill from glebis/claude-skills. This skill should be used when inspecting or applying advanced OpenType features of a font (woff2/otf/ttf) — ligatures, stylistic sets (ss01–ss20), character variants (cvXX), texture healing, slashed zero, tabular/oldstyle figures, fractions, small caps, case-sensitive forms — and generating the CSS to enable them.

When should I use Font Features?

Font Features fits situations like: openType features; texture healing; tabular figures; what can this font do.

How do I install Font Features in Claude Code?

Run `npx skills add glebis/claude-skills --skill font-features -a claude-code`. Or copy the skill folder (font-features in glebis/claude-skills) into .claude/skills/font-features in your project. Claude Code loads it when a task matches its description.

How do I install Font Features in Codex?

Run `npx skills add glebis/claude-skills --skill font-features -a codex`. Or copy the skill folder (font-features in glebis/claude-skills) into .agents/skills/font-features in your project. Codex loads it when a task matches its description.

Can I use Font Features in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add glebis/claude-skills --skill font-features -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/font-features, .gemini/skills/font-features, .github/skills/font-features and .opencode/skills/font-features in your project.

What does Font Features need to run?

Going by SKILL.md and its folder, Font Features needs Python for the scripts in its folder and the command-line tools its instructions call (python3 and pip). Our summary lists: Python 3.

Does Font Features access the network?

SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Font Features safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Font Features use?

Font Features is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Font Features use?

About 849 tokens (SKILL.md is roughly 3.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Font Features?

Skills that share tags, products or a category with Font Features: Web Artifacts Builder (anthropics/skills, 180k stars), React Doctor (makeplane/plane, 61k stars), Impeccable (bestofjs/bestofjs, 3.1k stars) and Figma Design System Builder (warpdotdev/warp, 65k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Font Features?

glebis (a GitHub user) maintains it in glebis/claude-skills, which has 389 GitHub stars. The repository holds 91 skills in this directory. The repository was last updated on September 26, 2026.

Source: glebis/claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.