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sebok

sebok is a skill for Claude Code from jgsystemsconsulting/jgs-se-knowledge-packs. It costs 298 tokens per session (5,612 once invoked), scanned A, original, no licence file.

A reference to systems engineering, the discipline of designing and managing complex systems throughout their life cycle. It covers systems thinking, modelling, architecture, and engineering processes.

In plain words
What is it for?
It helps with systems-engineering concepts, life-cycle planning, modelling, and model-based systems engineering.
Why use it?
It gives developers and engineers a common foundation for understanding how complex systems are defined and built.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the jgs-se-knowledge-packs plugin — 83 skills shipped together

not rated 54repo +62 3d ago A scan 298 tokens custom licence

Good fit It helps with systems-engineering concepts, life-cycle planning, modelling, and model-based systems engineering.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jgsystemsconsulting/jgs-se-knowledge-packs/sebok
View source ↗ jgsystemsconsulting/jgs-se-knowledge-packs jgsystemsconsulting.github.io
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 jgsystemsconsulting/jgs-se-knowledge-packs --skill sebok
Clone the repo
git clone --depth 1 https://github.com/jgsystemsconsulting/jgs-se-knowledge-packs

Made for: Claude Code.

Or install jgs-se-knowledge-packs, the plugin that ships this one along with the rest of its 83 skills.

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 sebok

README.md
[![agentmods](https://agentmods.dev/badge/skills/jgsystemsconsulting/jgs-se-knowledge-packs/sebok/github.svg)](https://agentmods.dev/skills/jgsystemsconsulting/jgs-se-knowledge-packs/sebok)
Your own site
<a href="https://agentmods.dev/skills/jgsystemsconsulting/jgs-se-knowledge-packs/sebok"><img src="https://agentmods.dev/badge/skills/jgsystemsconsulting/jgs-se-knowledge-packs/sebok/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 sebok

Your own site · 80×15
<a href="https://agentmods.dev/skills/jgsystemsconsulting/jgs-se-knowledge-packs/sebok"><img src="https://agentmods.dev/badge/skills/jgsystemsconsulting/jgs-se-knowledge-packs/sebok.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 298 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,612 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 $0.00298 $0.05612
Opus 5.5 $0.00119 $0.02245
Sonnet 5.5 $0.00060 $0.01122
Haiku 4.5 $0.00030 $0.00561

Measured 2mo ago against content hash 946592a0430e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sebok 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 2mo 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.

packs/sebok/SKILL.md · 203 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

41 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.

  1. 2mo ago First seen · 203 lines · 298 tokens per session scan A 946592a0430e

Subscribe to this mod's changes

sebok is a skill published in the GitHub repository jgsystemsconsulting/jgs-se-knowledge-packs (54 stars, last pushed 3d ago), with no licence file. It adds 298 tokens to every session and 5,612 once invoked, about $0.0012 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 2026-09-03.

Claude CodeLearning and teachingPlanningagent-skillsdodfaagaoknowledge-packs
Related

sebok compared with skills from other repositories

sebok next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
sebokjgsystemsconsulting/jgs-se-knowledge-packsSkill543d agononeA298Claude Code
hr-onboardingnexu-io/open-designSkill106ktodayApache-2.0A62Claude Code, Codex
exam-forecastanthropics/claude-for-legalSkill9.9ktodayApache-2.0A73Claude Code
deck-course-modulenexu-io/html-anythingSkill9.4kyesterdayApache-2.0A25Claude Code, Codex
eli5companion-inc/feynmanSkill10k7d agoMITA63Claude Code, Codex
explore-unknownsdzhng/skillsSkill1.4ktodayMITA162Claude Code, Codex
openclaw-knowledge-coachSibo-Zhao/OpenPraxisSkill41517d agoMITA65Codex