pretext

pretext is a skill for Claude Code from akillness/jeo-skills. It costs 131 tokens per session (1,455 once invoked), scanned A, original, no licence file.

A JavaScript and TypeScript library for measuring text and planning its layout without forcing the web page to recalculate its layout.

In plain words
What is it for?
Use it to calculate paragraph heights and line counts, lay out flowing text, and render rich text in web interfaces.
Why use it?
It helps avoid inaccurate or expensive browser layout work when text must fit around images or support emoji, Chinese, Japanese, Korean, right-to-left text, Canvas, or SVG.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to calculate paragraph heights and line counts, lay out flowing text, and render rich text in web interfaces.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/akillness/jeo-skills/pretext
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 akillness/jeo-skills --skill pretext
Clone the repo
git clone --depth 1 https://github.com/akillness/jeo-skills

Made for: Claude Code.

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.

agentmods badge for pretext

README.md
[![agentmods](https://agentmods.dev/badge/skills/akillness/jeo-skills/pretext/github.svg)](https://agentmods.dev/skills/akillness/jeo-skills/pretext)
Your own site
<a href="https://agentmods.dev/skills/akillness/jeo-skills/pretext"><img src="https://agentmods.dev/badge/skills/akillness/jeo-skills/pretext/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.

agentmods 80×15 button for pretext

Your own site · 80×15
<a href="https://agentmods.dev/skills/akillness/jeo-skills/pretext"><img src="https://agentmods.dev/badge/skills/akillness/jeo-skills/pretext.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 131 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,455 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 unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00131 $0.01455
Opus 5 $0.00066 $0.00727
Sonnet 5 $0.00026 $0.00291
Haiku 4.5 $0.00013 $0.00145

Measured 7d ago against content hash d2f77cdd08cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

pretext 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 7d 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.

.agent-skills/pretext/SKILL.md · 162 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file 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.

  1. 7d ago First seen · 162 lines · 131 tokens per session scan A d2f77cdd08cd

Subscribe to this mod's changes

pretext is a skill published in the GitHub repository akillness/jeo-skills (45 stars, last pushed today), with no licence file. It adds 131 tokens to every session and 1,455 once invoked, about $0.0007 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 2026-09-03.

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