A general connection and workflow tool for inspecting or editing an open Glyphs font, a file made in the Glyphs font-design application. It can route work to more focused type-design checks and supports reviewed, explicit changes.

Use it to inspect font data, search Glyphs guidance, prepare and preview glyph edits, apply authorised changes, and route specialised font tasks.

It provides a structured way to target the correct font, gather relevant facts, preview edits, and apply only the reviewed change. This reduces accidental edits to the wrong document or unapproved saves.

glyphs — Skill for Codex by thierryc/Glyphs-mcp

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add thierryc/Glyphs-mcp --skill global-skills

Clone the repo

git clone --depth 1 https://github.com/thierryc/Glyphs-mcp

Made for: Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/thierryc/glyphs-mcp/global-skills/github.svg)](https://agentmods.dev/skills/thierryc/glyphs-mcp/global-skills)

Your own site

<a href="https://agentmods.dev/skills/thierryc/glyphs-mcp/global-skills"><img src="https://agentmods.dev/badge/skills/thierryc/glyphs-mcp/global-skills/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/thierryc/glyphs-mcp/global-skills"><img src="https://agentmods.dev/badge/skills/thierryc/glyphs-mcp/global-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 687 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00035	$0.00687
Opus 5.5	$0.00014	$0.00275
Sonnet 5.5	$0.00007	$0.00137
Haiku 4.5	$0.00003	$0.00069

Measured 13d ago against content hash e091ac68b647, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

glyphs scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

reports/discovery-identity/preservation/skill-snapshots/global-skills/SKILL.md · 56 lines

How it starts

The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Glyphs MCP

Use Knowledge for facts, focused skills for judgment, and generic tools for mechanics. Generic Python with no Glyphs app or font target does not trigger this skill.

Core workflow

Call get_server_info; require data.apiMajor == 2 and inspect the entity, projection, operation, Knowledge, and permanent Python capabilities.
Resolve one stable font with list_documents. Use read_document with an exact EntitySelector and the smallest useful Projection; retain the document fingerprint and follow selector-owned pagination.
Use search_knowledge when a design, engineering, Glyphs API, scripting, or file-format fact affects the decision. Retrieve selected evidence with get_knowledge and retain its citation and version scope.
Make typographic choices in the applicable focused skill. Tools must not be treated as sources of design policy.
When a requested edit is mechanically expressible, create explicit set, translate, insert, remove, move, or duplicate operations and before/after constraints. Call preview_change, explain the immutable semantic patch, then apply its exact previewId once with apply_change.
When the typed surface is insufficient, use the permanent execute_python fallback: read_only for bounded inspection, staged_document for detached edits applied through apply_change, and live_open_world only for explicit unsupported UI, file, process, or other external effects.
Re-read affected entities, inspect list_history or get_operation when needed, and use revert_change for a compatible unsaved-session reversal. Never save unless the user separately requests save_document.

The user may save in Glyphs between any two actions. Treat that as normal persistence concurrency: only a changed live canonical fingerprint stales a preview. apply_change reconciles saved-before, saved-after, or intermediate states and reports residual unsaved work. Never prevent, undo, or repeat a Save. Keep expectedDocumentFingerprint, expectedSourceFileFingerprint, and expectedDestinationFileFingerprint distinct; only save_document protects file overwrites.

Read the full file on GitHub · 56 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

13d ago First seen · 56 lines · 35 tokens per session scan A e091ac68b647

Subscribe to this mod's changes

glyphs is a skill published in the GitHub repository thierryc/Glyphs-mcp (54 stars, last pushed today), licensed Apache-2.0. It adds 35 tokens to every session and 687 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-08.

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