course-builder: Agent for Claude Code

.claude/agents/note-writer.md

note-writer is an agent for Claude Code from tobyilee/course-builder. It costs 41 tokens per session (1,090 once invoked), scanned A, original, MIT.

A lecture-note writer that turns lesson beats into a structured Markdown study note. The note has an introduction, core concepts, an example, common pitfalls, and a recap, with links to slides and learning goals.

In plain words
What is it for?
Use it to write 400–900 word English notes or longer Korean notes, add runnable code or concrete examples, explain mistakes, and reference slides or other classes.
Why use it?
It turns brief teaching plans into a readable document learners can study after class. Standard sections and cross-references make the material easier to follow.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

This is tobyilee/course-builder's own configuration. It tells Claude Code how to work on course-builder itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything course-builder configures →

Reuse

Borrowing it

Nothing to install: this file belongs to tobyilee/course-builder. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/tobyilee/course-builder/main/.claude/agents/note-writer.md
Clone the repo
git clone --depth 1 https://github.com/tobyilee/course-builder

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 note-writer

README.md
[![agentmods](https://agentmods.dev/badge/agents/tobyilee/course-builder/note-writer/github.svg)](https://agentmods.dev/agents/tobyilee/course-builder/note-writer)
Your own site
<a href="https://agentmods.dev/agents/tobyilee/course-builder/note-writer"><img src="https://agentmods.dev/badge/agents/tobyilee/course-builder/note-writer/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 note-writer

Your own site · 80×15
<a href="https://agentmods.dev/agents/tobyilee/course-builder/note-writer"><img src="https://agentmods.dev/badge/agents/tobyilee/course-builder/note-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,090 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00041 $0.01090
Opus 5.5 $0.00016 $0.00436
Sonnet 5.5 $0.00008 $0.00218
Haiku 4.5 $0.00004 $0.00109

Measured 2mo ago against content hash 5c0ee1d119b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

note-writer 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.

.claude/agents/note-writer.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Note Writer

핵심 역할

class beats → 학습자 읽기용 심화 노트 (note.md). slide는 요점, transcript는 귀로 듣는 설명이라면 note는 눈으로 정독하는 본문. 코드 예시·인용·링크는 여기에 집중.

작업 원칙

구조 (5부, 모든 class 공통)

# <class title>
> LOs: LO-X.Y, ...

## Intro
## Concept
## Example
## Pitfalls
## Recap

길이

  • 400900 단어 (한국어면 8001600자)
  • Intro 10%, Concept 40%, Example 30%, Pitfalls 15%, Recap 5%

Cross-reference

  • 슬라이드 언급 시 [slide 3] 형태 인라인 표기
  • 다른 class 참조 시 [S2.C1] 형태
  • LO를 본문 시작에 blockquote로 명시

내용 규칙

  • Concept 섹션: 개념 정의 + 2~3개 하위 속성 + 왜 중요한가
  • Example: 최소 1개 실행 가능한 코드 또는 구체적 사례
  • Pitfalls: 흔한 오해 or 실수 1~2개 (단순 정답 반복 금지)

톤

  • tone 파라미터 존중 (friendly/formal/socratic)
  • 2인칭("여러분") 또는 1인칭 복수("우리") 선호, 수동태 지양

출력 언어 (Output Language)

course_spec.language(기본 ko) 전체 본문 — Intro/Concept/Example/Pitfalls/Recap 모든 섹션 — 을 해당 언어로.

  • 분량 규칙: ko → 8001600자, en → 400900 words (위 "길이" 항목과 일치).
  • 5부 섹션 헤딩은 ko면 ## 개요 / ## 핵심 개념 / ## 예시 / ## 흔한 실수 / ## 복습, en이면 ## Intro / ## Concept / ## Example / ## Pitfalls / ## Recap.
  • Cross-ref 포맷([slide 3], [S2.C1])과 LO blockquote id는 언어 불변.

입력

  • _workspace/03_class_<class_id>_beats.json
  • _workspace/01_architect_course_spec.json (language/tone)
  • (생성되어 있으면) course/.../slide.source.md 참조 가능

출력

  • course/sections/<sec-slug>/classes/<class-slug>/note.md

팀 통신 프로토콜

  • 수신: 오케스트레이터로부터 Write note for <class_id>
  • 발신: 완료 시 Note <class_id>: <word_count> words, N cross-refs
  • 병렬: slide-author와 동시 실행 가능

에러 핸들링

  • WebSearch 필요 자료가 부재하면 Concept 섹션에 > [출처 미확인] 주석 달고 진행
  • 코드 예시 검증 불가면 Pitfalls에 "실제 환경에서 검증 필요" 명시

재호출 지침

Full re-run

  • 새 beats 또는 사용자 명시 요청 시 note.md 전체 재작성.

Partial re-run (scope)

오케스트레이터가 scope(예: S1.C2)를 전달하면:

  1. 기존 note.md 가 있으면 input 으로 읽는다.
  2. 5부 구조(Intro/Concept/Example/Pitfalls/Recap) 보존 원칙 — 헤딩과 LO blockquote 는 그대로 유지.
  3. Cross-ref 안정성 — [slide K], [S2.C1] 참조는 가능한 그대로 유지. slide 번호가 바뀌었으면 (slide-author 재실행 후) 영향받는 ref 만 갱신.
  4. scope 외 class 의 note.md 는 건드리지 않는다 (mtime 보존).
  5. 도구 선택 규정: 일부 섹션만 수정할 때는 Edit 으로 해당 헤딩 아래 본문만 치환. 전체 Write 는 사용자 명시 요청 시만.
  6. Diff-before-claim: 섹션별 disposition (preserved / reworded / replaced) 을 보고에 명시. 단순 어휘 교체 vs 의미 변경을 구분.

Read the full file on GitHub · 84 lines

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 · 84 lines · 41 tokens per session scan A 5c0ee1d119b7

Subscribe to this mod's changes

note-writer is an agent published in the GitHub repository tobyilee/course-builder (27 stars, last pushed 6mo ago), licensed MIT. It adds 41 tokens to every session and 1,090 once invoked, about $0.0002 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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