Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/lukascivil/json-difference/claude-mdgit clone --depth 1 https://github.com/lukascivil/json-differenceWhat 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 | $0.02112 | $0.02112 |
| Opus 5 | $0.01056 | $0.01056 |
| Sonnet 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 2d 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.
- 2d 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 20d ago), licensed MIT. It adds 2,112 tokens to every session, about $0.0106 per session on Opus 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
blazediff AGENTS.md
Instructions for teimurjan/blazediff, covering blazediff agent rules, hard rules, quick commands and pointers.
autonomous-dev CLAUDE.md
Claude Code instructions for akaszubski/autonomous-dev, covering autonomous-dev, critical rules, maintainer escape hatches, architecture and code navigation.
tour AGENTS.md
Instructions for a9a4k/tour, covering tour and references.
RU_Club_Website AGENTS.md
AGENTS.md instructions for VoidX3D/RU_Club_Website, covering agents — project guide, tech stack, architecture, data flow and hardcoded (never from db).
appwrite AGENTS.md
AGENTS.md instructions for appwrite/appwrite, covering appwrite, commands, stack, layout and libraries.
planning-with-files AGENTS.md
AGENTS.md instructions for OthmanAdi/planning-with-files, covering agents.md — planning-with-files agent reference card, commit rules, release checklist (12 steps), version bump scope and changelog format.