Borrowing it
Nothing to install: this file belongs to NanoNative/nano. 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/NanoNative/nano/main/CLAUDE.mdgit clone --depth 1 https://github.com/NanoNative/nanoWrote 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/nanonative/nano/claude-md)<a href="https://agentmods.dev/instructions/nanonative/nano/claude-md"><img src="https://agentmods.dev/badge/instructions/nanonative/nano/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/nanonative/nano/claude-md"><img src="https://agentmods.dev/badge/instructions/nanonative/nano/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 | $0.01065 | $0.01065 |
| Opus 5.5 | $0.00426 | $0.00426 |
| Sonnet 5.5 | $0.00213 | $0.00213 |
| Haiku 4.5 | $0.00106 | $0.00106 |
Grade A, and why
nano 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 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.
How it starts
The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
Nano is a lightweight Java microservice framework that revolutionizes development by eliminating traditional OOP patterns (Controllers, Services, Repositories) in favor of static event listeners that react to events in a functional, stateless manner.
Core Philosophy:
- Static Methods, Not Objects: Business logic lives in static methods, not service objects
- Event-Driven Communication: Everything communicates through events, not direct method calls
- Universal Services: Services are generic connectors for external systems - no business logic
- TypeMap Integration: Built-in type conversion using Berlin Yuna's TypeMap library
- Global Error Handling: Errors are events that can be subscribed to globally
Build & Development Commands
Maven Commands
- Build:
./mvnw clean compileormvn clean compile - Test:
./mvnw testormvn test - Package:
./mvnw clean packageormvn clean package - Coverage Report:
./mvnw clean verify(generates Jacoco coverage intarget/site/jacoco/) - Release Build:
./mvnw clean deploy -P release(requires GPG setup)
GraalVM Native Image
- Add the native-image profile to pom.xml and run:
mvn package -Pnative-image - Project is designed to be fully compilable with GraalVM for native executables
Architecture & Code Structure
Core Components
Nano: Main application class extendingNanoServicesContext: Central hub for configuration, event channels, and service managementEvent<T, R>: Generic event system with payload and response typesService: Base interface for external system connectors (HTTP, databases, etc.)Channel: Event routing and subscription mechanism
Key Directories
src/main/java/org/nanonative/nano/core/: Core framework classessrc/main/java/org/nanonative/nano/services/: Built-in services (HTTP, logging, metrics, file watching)src/main/java/org/nanonative/nano/helper/: Utility classes and event systemsrc/test/java/org/nanonative/nano/examples/: Working examples and patternsdocs/: Comprehensive documentation
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 · 98 lines · 1,065 tokens per session scan A 5a2bae75cb7c
nano CLAUDE.md is an instructions file published in the GitHub repository NanoNative/nano (108 stars, last pushed 10d ago), licensed Apache-2.0. It adds 1,065 tokens to every session, about $0.0043 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 2026-09-04.
Other instructions, from other repositories
graftcode graftcode-java.instructions.md
Instructions for grft-dev/graftcode, covering graftcode — java backend services, when this applies (always), authoritative docs (source of truth), golden rules and service = plain maven/gradle module (no web framework).
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).