Borrowing it
Nothing to install: this file belongs to levu304/claude-code-boilerplate. 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/levu304/claude-code-boilerplate/main/CLAUDE.mdgit clone --depth 1 https://github.com/levu304/claude-code-boilerplateWrote 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/levu304/claude-code-boilerplate/claude-md)<a href="https://agentmods.dev/instructions/levu304/claude-code-boilerplate/claude-md"><img src="https://agentmods.dev/badge/instructions/levu304/claude-code-boilerplate/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/levu304/claude-code-boilerplate/claude-md"><img src="https://agentmods.dev/badge/instructions/levu304/claude-code-boilerplate/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 | $0.13209 | $0.13209 |
| Opus 5.5 | $0.05284 | $0.05284 |
| Sonnet 5.5 | $0.02642 | $0.02642 |
| Haiku 4.5 | $0.01321 | $0.01321 |
Grade A, and why
claude-code-boilerplate CLAUDE.md scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const response = await fetch(url); How it starts
The opening of the file, as written. The whole thing — 1,640 lines — stays where its author put it; the contents beside it link to each section on GitHub.
{{PROJECT_NAME}} Coding Standards & Best Practices
Version: {{VERSION}} Last Updated: {{DATE}} Architecture: {{ARCHITECTURE_TYPE}}
Quick Start
- Copy this file to your project root as
CLAUDE.md - Replace all
{{PLACEHOLDER}}values with your project specifics - Delete language/framework sections that don't apply to your stack
- Add project-specific patterns as needed
Project Configuration
| Setting | Value | Options |
|---|---|---|
| Language | {{LANGUAGE}} |
TypeScript, JavaScript, Python, Go, Rust |
| Package Manager | {{PACKAGE_MANAGER}} |
pnpm, bun, npm, yarn, pip, poetry, cargo, go mod |
| Backend Framework | {{BACKEND_FRAMEWORK}} |
Hono, Elysia, Express, Fastify, FastAPI, Gin, Axum |
| Frontend Framework | {{FRONTEND_FRAMEWORK}} |
React, Vue, Svelte, Solid, None |
| Database/ORM | {{DATABASE_ORM}} |
Drizzle, Prisma, SQLAlchemy, GORM, Diesel |
| Testing Framework | {{TESTING_FRAMEWORK}} |
Vitest, Jest, pytest, go test, cargo test |
| Linter/Formatter | {{LINTER_FORMATTER}} |
Biome, ESLint+Prettier, Ruff, golangci-lint, rustfmt |
Table of Contents
- Technology Selection Guidelines
- Naming Conventions
- Language-Specific Standards
- Backend Patterns
- Frontend Patterns
- Database Patterns
- Testing Standards
- SOLID Principles
- Security Best Practices
- Error Handling
- Performance Guidelines
- Documentation Standards
- Git Workflow
- Issue Hierarchy
- AI Agent Workflow - "No Code, No Problem"
- Claude Code Configuration
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.
- 2mo ago First seen · 1,640 lines · 13,209 tokens per session scan A d1246645c5b4
claude-code-boilerplate CLAUDE.md is an instructions file published in the GitHub repository levu304/claude-code-boilerplate (130 stars, last pushed 6mo ago), licensed MIT. It adds 13,209 tokens to every session, about $0.0528 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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