Borrowing it
Nothing to install: this file belongs to lukascivil/json-difference. 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/lukascivil/json-difference/master/CLAUDE.mdgit clone --depth 1 https://github.com/lukascivil/json-differenceWrote 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/lukascivil/json-difference/claude-md)<a href="https://agentmods.dev/instructions/lukascivil/json-difference/claude-md"><img src="https://agentmods.dev/badge/instructions/lukascivil/json-difference/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/lukascivil/json-difference/claude-md"><img src="https://agentmods.dev/badge/instructions/lukascivil/json-difference/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 | $0.02112 | $0.02112 |
| Opus 5.5 | $0.00845 | $0.00845 |
| Sonnet 5.5 | $0.00422 | $0.00422 |
| Haiku 4.5 | $0.00211 | $0.00211 |
Grade A, and why
json-difference 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 — 116 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.
General Guidelines for working with Nx
- For navigating/exploring the workspace, invoke the
nx-workspaceskill first - it has patterns for querying projects, targets, and dependencies - When running tasks (for example build, lint, test, e2e, etc.), always prefer running the task through
nx(i.e.nx run,nx run-many,nx affected) instead of using the underlying tooling directly - Prefix nx commands with the workspace's package manager (e.g.,
pnpm nx build,npm exec nx test) - avoids using globally installed CLI - You have access to the Nx MCP server and its tools, use them to help the user
- For Nx plugin best practices, check
node_modules/@nx/<plugin>/PLUGIN.md. Not all plugins have this file - proceed without it if unavailable. - NEVER guess CLI flags - always check nx_docs or
--helpfirst when unsure
Scaffolding & Generators
- For scaffolding tasks (creating apps, libs, project structure, setup), ALWAYS invoke the
nx-generateskill FIRST before exploring or calling MCP tools
When to use nx_docs
- USE for: advanced config options, unfamiliar flags, migration guides, plugin configuration, edge cases
- DON'T USE for: basic generator syntax (
nx g @nx/react:app), standard commands, things you already know - The
nx-generateskill handles generator discovery internally - don't call nx_docs just to look up generator syntax
Repository overview
Nx monorepo (yarn 4, berry) that publishes the json-difference library — a path-based JSON delta computer — plus ancillary projects that consume it.
| Project | Path | Type | Notes |
|---|---|---|---|
json-difference |
libs/json-difference |
library (published) | Core lib, ESM/CJS + standalone browser bundle |
json-difference-cli |
libs/json-difference-cli |
library (published) | jd CLI wrapper (yargs) |
mcp-json-diff |
tools/mcp-json-diff |
application | MCP server exposing the lib via stdio |
playground |
apps/playground |
application | React + Vite demo deployed to GitHub Pages |
example |
apps/example |
application | Runnable Node usage scripts (simple.ts, stress.ts) |
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 · 116 lines · 2,112 tokens per session scan A 017ef39df82f
json-difference CLAUDE.md is an instructions file published in the GitHub repository lukascivil/json-difference (58 stars, last pushed 2mo ago), licensed MIT. It adds 2,112 tokens to every session, about $0.0084 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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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.
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.