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.
npx skills add thierryc/Glyphs-mcp --skill glyphs-mcp-spacinggit clone --depth 1 https://github.com/thierryc/Glyphs-mcpWrote 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.
[](https://agentmods.dev/skills/thierryc/glyphs-mcp/glyphs-mcp-spacing)<a href="https://agentmods.dev/skills/thierryc/glyphs-mcp/glyphs-mcp-spacing"><img src="https://agentmods.dev/badge/skills/thierryc/glyphs-mcp/glyphs-mcp-spacing/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.
<a href="https://agentmods.dev/skills/thierryc/glyphs-mcp/glyphs-mcp-spacing"><img src="https://agentmods.dev/badge/skills/thierryc/glyphs-mcp/glyphs-mcp-spacing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00061 | $0.00767 |
| Opus 5 | $0.00030 | $0.00383 |
| Sonnet 5 | $0.00012 | $0.00153 |
| Haiku 4.5 | $0.00006 | $0.00077 |
Grade A, and why
glyphs-mcp-spacing 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 43 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Glyphs MCP spacing
Use class-aware review, normalized safeguards, and visual proofing. Negative sidebearings are legal; suspect them only when magnitude, class, geometry, or their effect across word spaces is implausible. Read Negative sidebearings and spacing safeguards when a result is negative, blocked, exempted, or manually overridden.
Safe workflow
- Connect to
glyphs-mcp-serverand calllist_open_fonts. - Identify the exact font index and master ID before calculating anything.
- Inspect UPM, x-height, cap height, italic angle, fixed-pitch status, current width and bearings, metrics keys, automatic alignment, whether current metrics are trusted or placeholders, and glyph category/Unicode data.
- Call
review_spacingbefore mutation. Prefer omitted/"auto"referenceGlyph, then verify everyresolvedReferenceGlyph,referenceFallback, andglyphClass. - Inspect normalized metrics, negative-bearing warnings/blocks, width assessment, tabular provenance, confidence, and current-metric trust. Do not use a delta from untrusted placeholder metrics as proof that a proposal is wrong.
- Review representative glyphs before approving a set:
- Uppercase:
H O J T V W Y - Lowercase:
n o f j - Figures:
one sevenand all default figures - Narrow punctuation, quotation marks, and any marks in scope
- Uppercase:
- Preserve width only when fixed-pitch metadata, equal default figures, width links, or explicit intent supports it. Do not infer monospacing from a family name or typewriter styling.
- Call
apply_spacingwithdry_run=trueusing the exact defaults, rules, guards, clamps, and intended overrides. Confirm its guard assessments match review. - Require explicit authorization unless the user already clearly requested mutation. Apply only eligible results. Disclose
overrides.blockedGlyphsandoverrides.manualReviewGlyphsseparately; an override does not make the original assessment safe. - Re-read applied metrics and print a verification table. Never save the Glyphs document automatically.
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.
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.
- 12d ago First seen · 43 lines · 61 tokens per session scan A f73eae0cd260
glyphs-mcp-spacing is a skill published in the GitHub repository thierryc/Glyphs-mcp (44 stars, last pushed yesterday), licensed Apache-2.0. It adds 61 tokens to every session and 767 once invoked, about $0.0003 per session on Opus 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 2026-08-30.
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