Borrowing it
Nothing to install: this file belongs to naver/fixture-monkey. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/naver/fixture-monkey/main/CLAUDE.mdgit clone --depth 1 https://github.com/naver/fixture-monkeyWrote 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/instructions/naver/fixture-monkey/claude-md)<a href="https://agentmods.dev/instructions/naver/fixture-monkey/claude-md"><img src="https://agentmods.dev/badge/instructions/naver/fixture-monkey/claude-md/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/instructions/naver/fixture-monkey/claude-md"><img src="https://agentmods.dev/badge/instructions/naver/fixture-monkey/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01304 | $0.01304 |
| Opus 5.5 | $0.00522 | $0.00522 |
| Sonnet 5.5 | $0.00261 | $0.00261 |
| Haiku 4.5 | $0.00130 | $0.00130 |
Grade A, and why
fixture-monkey CLAUDE.md 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 21d 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 — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fixture Monkey - Claude Code 가이드
절대 규칙
- 기존 테스트는 삭제/수정/주석 처리 금지
- 테스트 실패 시 바로 롤백 (개선 가능하다고 판단되면 사용자에게 롤백 여부 확인)
- Adapter 작업 시
fixture-monkey,fixture-monkey-api모듈 코드 수정 금지 (필요 시 사용자에게 확인) - 커밋은 사용자가 명시적으로 요청할 때만 (메시지는 영어)
- 데드 코드는 제거한다
- [작업 흐름] 을 보고 작업을 한다
프로젝트 구조
| 모듈/폴더 | 역할 |
|---|---|
fixture-monkey/ |
메인 모듈 (ArbitraryBuilder, FixtureMonkey 등) |
fixture-monkey-api/ |
공용 API 인터페이스 |
object-farm-api/ |
JvmNodeTree, PathExpression 등 구조 관련 API |
fixture-monkey-tests/ |
통합 테스트 |
history/ |
벤치마크 결과 + 작업 히스토리 |
guide/ |
프로파일링 가이드 등 참고 문서 |
빌드 및 테스트
./gradlew build # 전체 빌드
./gradlew :fixture-monkey:test # 특정 모듈 테스트
회귀 테스트:
./gradlew --continue clean \
:object-farm-api:check \
:fixture-monkey:test \
:fixture-monkey-tests:java-tests:test \
:fixture-monkey-tests:java-17-tests:test \
:fixture-monkey-tests:kotlin-tests:test
코드 스타일
- 탭 들여쓰기 (스페이스 아님)
- 주석은
// given,// when,// then만 허용 (예외 시 사용자 확인) - Javadoc은 public API에만 작성
@API어노테이션으로 API 안정성 표시 (EXPERIMENTAL,MAINTAINED등)
디버깅 절차
테스트 실패 시 아래 순서를 따른다:
- 코드 분석 우선 - 코드를 읽고 원인 추론
- 런타임 확인 - 분석만으로 부족하면 디버그 로그 추가 후
--info플래그로 실행 - 문제 격리 - 반복 실패 시 최소 재현 테스트 작성 (sample() → adapt → 특정 Phase 순으로 좁힘)
- 수정 및 검증 - 원인 부분만 수정, 기존 테스트 전체 통과 확인
tracer 활성화:
FixtureMonkey fm = FixtureMonkey.builder()
.plugin(new JavaNodeTreeAdapterPlugin()
.tracer(AdapterTracer.console()))
.build();
테스트 케이스 관리
테스트 작성/발견 시 해당 경우의 수가 기존 테스트에서 커버하지 못하는 새로운 경우의 수라고 판단되면:
test-case/폴더의 해당 카테고리 마크다운 파일에 경우의 수를 추가- 카테고리가 없으면 새 마크다운 파일 생성
- 각 경우의 수는 원자적 단위(하나의 독립된 동작/조건)로 기록
- 타입 변형(String→Int, List→Set→Array)은 같은 경우의 수로 취급 — 동작이 다른 경우만 별도
파일 형식
[x]이미 테스트됨 (테스트파일:메서드명)[ ]미구현
카테고리
| 파일 | 카테고리 |
|---|---|
basic-generation.md |
기본 타입/객체 생성 |
container.md |
컨테이너 타입 |
customization.md |
set/size/apply/postCondition 등 |
generic.md |
제네릭 타입 |
interface-abstract.md |
인터페이스/추상/sealed class |
recursive.md |
재귀/순환 참조 |
instantiator.md |
생성자/팩토리 메서드 |
introspector.md |
ArbitraryIntrospector 관련 |
register.md |
register/registerGroup |
strict-mode.md |
strict mode |
plugin.md |
플러그인 |
property-selector.md |
PropertySelector/expression |
kotlin.md |
Kotlin 전용 |
annotation-validation.md |
어노테이션/validation |
then-apply-ordering.md |
thenApply/size/set 순서 상호작용 |
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.
- 21d ago Changed · -75 tokens per session cf7196f9f39b
- 1mo ago First seen · 124 lines · 1,379 tokens per session scan A 103fc2a9b32a
fixture-monkey CLAUDE.md is an instructions file published in the GitHub repository naver/fixture-monkey (700 stars, last pushed 20d ago), licensed Apache-2.0. It adds 1,304 tokens to every session, about $0.0052 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.