What is nexus CLAUDE.md?

Setup and working instructions for Nexus Command, a locally running browser application in which multiple specialist AI agents collaborate on software development.

Installing dependencies, starting the local web interface, configuring an AI provider, understanding available environment variables, and finding the project's main scripts.

They explain how to start the project without Docker or a separate PostgreSQL server, how the local database works, and when an API key is needed.

How PermaShipAI/nexus configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to PermaShipAI/nexus. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/PermaShipAI/nexus/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/PermaShipAI/nexus

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/permashipai/nexus/claude-md/github.svg)](https://agentmods.dev/instructions/permashipai/nexus/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/permashipai/nexus/claude-md"><img src="https://agentmods.dev/badge/instructions/permashipai/nexus/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/permashipai/nexus/claude-md"><img src="https://agentmods.dev/badge/instructions/permashipai/nexus/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,089 This file is loaded in full into every session.

When invoked 1,089 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.01089	$0.01089
Opus 5.5	$0.00436	$0.00436
Sonnet 5.5	$0.00218	$0.00218
Haiku 4.5	$0.00109	$0.00109

Measured 2mo ago against content hash ca71f948db64, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nexus 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 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.

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.

CLAUDE.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — AI-Assisted Setup Guide

This file helps AI coding assistants (Claude Code, Cursor, Copilot, etc.) understand how to set up and work with this project.

IMPORTANT: How to Start This Project

npm install
npm run dev

That's it. Do NOT start Docker or PostgreSQL. Do NOT set DISCORD_BOT_TOKEN. Do NOT manually create a .env file.

The npm run dev command:

Prompts in the terminal for your LLM provider + API key (first run only)
Saves the key to .env automatically
Uses an embedded database (PGlite) — no Postgres needed
Starts a web UI at http://localhost:3000

If the user already has a .env with LLM_API_KEY or GEMINI_API_KEY, the prompt is skipped.

What This Is

Nexus Command is a multi-agent AI system with 10 specialist agents (CISO, SRE, QA Manager, etc.) that collaborate on software development. It runs locally in a browser at http://localhost:3000.

Environment Variables

Only needed if you want to override defaults. The system works with zero env vars (it will prompt for the API key).

Variable	Required	Default	Description
`LLM_API_KEY`	Yes (prompted)	-	API key for your LLM provider
`LLM_PROVIDER`	No	`gemini`	`gemini`, `anthropic`, `openai`, `ollama`, `openrouter`
`DATABASE_URL`	No	embedded PGlite	PostgreSQL connection string (overrides embedded DB)
`EXECUTION_BACKEND`	No	`noop`	`claude-code`, `gemini-cli`, `codex-cli`, `openclaw`, `permaship`
`LOCAL_UI_PORT`	No	`3000`	Port for the web UI
`LOG_LEVEL`	No	`info`	`debug` for verbose output

Do NOT set or require: DISCORD_BOT_TOKEN, DISCORD_CLIENT_ID, COMMS_SIGNING_SECRET, PERMASHIP_API_KEY, or any PermaShip-specific variables. These are only for the PermaShip deployment profile, not for local development.

Scripts

Script	Purpose
`npm run dev`	Start the local UI (this is the main command)
`npm start`	Same as `npm run dev`
`npm run dev:server`	Start the webhook server (Discord/Slack mode — requires additional config)
`npm run build`	Compile TypeScript
`npm run typecheck`	Type checking
`npm run test:run`	Run tests

Read the full file on GitHub · 100 lines

Changes

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 · 100 lines · 1,089 tokens per session scan A ca71f948db64

Subscribe to this mod's changes

nexus CLAUDE.md is an instructions file published in the GitHub repository PermaShipAI/nexus (58 stars, last pushed 3mo ago), licensed MIT. It adds 1,089 tokens to every session, about $0.0044 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.

Browser automation Building agents

nexus CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
nexus CLAUDE.mdPermaShipAI/nexus	Instructions file	58	3mo ago	MIT	A	1,089	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

nexus: Instructions file for Claude Code