What is course-builder?

A skill that turns course materials such as lecture notes, textbook chapters, homework, and solutions into a searchable course knowledge base.

Use it when adding course materials or preparing the data needed by study commands such as drilling, pattern finding, and homework mapping.

It organizes raw materials into recurring techniques, topic summaries, and a map showing which homework covers which sections.

course-builder — Skill for Claude Code by OPTIMETA/PAIDEIA

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 OPTIMETA/PAIDEIA --skill course-builder

Clone the repo

git clone --depth 1 https://github.com/OPTIMETA/PAIDEIA

Made for: Claude Code.

Or install paideia, the plugin that ships this one along with the rest of its 6 skills, 18 commands.

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/optimeta/paideia/course-builder/github.svg)](https://agentmods.dev/skills/optimeta/paideia/course-builder)

Your own site

<a href="https://agentmods.dev/skills/optimeta/paideia/course-builder"><img src="https://agentmods.dev/badge/skills/optimeta/paideia/course-builder/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/optimeta/paideia/course-builder"><img src="https://agentmods.dev/badge/skills/optimeta/paideia/course-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 119 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,584 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. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Agent Snooping · line 47
Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.

Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.

How audits are shown

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	$0.00119	$0.02584
Opus 5.5	$0.00048	$0.01034
Sonnet 5.5	$0.00024	$0.00517
Haiku 4.5	$0.00012	$0.00258

Measured 1mo ago against content hash dd81595a6945, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

course-builder 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 1mo 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.

plugins/paideia/skills/course-builder/SKILL.md · 198 lines

How it starts

The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Course Builder

Overview

This skill turns raw course materials into a structured knowledge base that downstream drilling commands (/twin, /blind, /chain, /pattern, /hwmap) can query. It is domain-general — the same pipeline works for a Linear Algebra course as for a Quantum Mechanics course.

Two-phase pipeline:

Phase 1: /ingest
  materials/**/*.pdf  →  converted/**/*.md      (via pdf skill)
  materials/**/*.md   →  (copied as-is)

Phase 2: /analyze
  converted/** + materials/*.md  →  course-index/patterns.md
                                     course-index/coverage.md
                                     course-index/summary.md

When to load

User runs /ingest or /analyze
User mentions adding new course materials
User asks "what does this course cover" or "what are the key techniques"
Downstream commands (/twin, /blind, /pattern, /hwmap) need course-index/ data that doesn't exist yet

Phase 1: Ingest

Discovery

Scan materials/ recursively. Classify each file by path and extension:

materials/lectures/*.pdf|.md — lecture notes
materials/textbook/*.pdf|.md — textbook chapters
materials/homework/*.pdf|.md — HW problem sets (rename for consistency: hw1.pdf, hw2.pdf, ...)
materials/solutions/*.pdf|.md — HW solutions (hw1_sol.pdf, etc.) or worked examples

Ambiguous location (e.g., a PDF in materials/ root)? Ask user once to categorize, then remember.

Conversion

All .pdf files in materials/** go through the vision pipeline. pdfplumber was tried as a fast path and proved unreliable on course materials — even prose-heavy textbook pages silently word-salad when they mix equations or multi-column figures. Routing everything uniformly through vision is simpler than maintaining per-category heuristics with fallbacks. Full pipeline in skills/pdf/VISION.md; the short form:

Load skills/pdf/SKILL.md and skills/pdf/VISION.md.
Render each PDF to PNG at dpi=160 (via pdf2image) into converted/<category>/_pages/<stem>/.
Resize all rendered PNGs to ≤1800 px on the long edge before any agent starts reading — this is the hard 2000 px many-image limit; violating it wastes entire agent runs.
Spawn one parallel general-purpose agent per PDF. Each agent reads its own pages sequentially (not in parallel batches — same dimension limit) and transcribes to clean LaTeX markdown ( $...$ / $$...$$). Unreadable symbols get [?].
Write converted/<category>/<stem>.md with provenance: .
After all agents finish, delete the _pages/ scratch dirs.

Read the full file on GitHub · 198 lines

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.

concept-graph.md 6.8 KB

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.

1mo ago First seen · 198 lines · 119 tokens per session scan A dd81595a6945

Subscribe to this mod's changes

course-builder is a skill published in the GitHub repository OPTIMETA/PAIDEIA (91 stars, last pushed 3mo ago), licensed MIT. It adds 119 tokens to every session and 2,584 once invoked, about $0.0005 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 2026-08-30.

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