Borrowing it
Nothing to install: this file belongs to plmbr/nui. 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/plmbr/nui/main/CLAUDE.mdgit clone --depth 1 https://github.com/plmbr/nuiWrote 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/plmbr/nui/claude-md)<a href="https://agentmods.dev/instructions/plmbr/nui/claude-md"><img src="https://agentmods.dev/badge/instructions/plmbr/nui/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/plmbr/nui/claude-md"><img src="https://agentmods.dev/badge/instructions/plmbr/nui/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 | $0.03068 | $0.03068 |
| Opus 5.5 | $0.01227 | $0.01227 |
| Sonnet 5.5 | $0.00614 | $0.00614 |
| Haiku 4.5 | $0.00307 | $0.00307 |
Grade A, and why
nui 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 — 206 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.
Commands
Backend (Go)
go build ./... # compile
go test . ./cmd/... ./internal/... # run tests (avoids ui/node_modules)
./scripts/test-all.sh # Go + Vitest + Playwright E2E
go run . server # build + run server on :8080
go run . server --port 3000 # custom port (use this for development)
go run . server -a claude-code -m "Review README" -w . --open --hide-input
Frontend (run from ui/)
npm install
npm run dev # Vite dev server with HMR (proxies /api to Go server)
npm run build # compile to ui/dist (required before go build)
npm run lint # ESLint
Full production build
cd ui && npm run build && cd .. && go build -o nui_bin . && ./nui_bin server
ui/distmust exist beforego build— it is embedded into the binary at compile time viaui/embed.go(//go:embed all:dist).
Docker images (run from docker/)
docker build -f claude-code/Dockerfile -t nui-claude-code:latest .
docker build -f pi/Dockerfile -t nui-pi:latest .
docker build -f codex/Dockerfile -t nui-codex:latest .
docker build -f opencode/Dockerfile -t nui-opencode:latest .
All docker sandbox images listen on port 8090 and share http_nui_agent.py. They forward ANTHROPIC_API_KEY, ANTHROPIC_BASE_URL, OPENAI_API_KEY, and OPENAI_BASE_URL from the host. nui adds --add-host=<hostname>:host-gateway when a base URL resolves to loopback.
Architecture
Request flow
flowchart LR
Browser -->|REST| API["/api/*"]
Browser -->|AG-UI SSE| AGUI["/api/sessions/:id/ag-ui"]
API --> Store["~/.nui/data.json"]
AGUI --> ADLAgent
ADLAgent --> Manager
Manager --> Harnesses["ClaudeCode / Pi / Codex / OpenCode"]
Manager --> HTTPExt["HTTPExtensionAgent"]
HTTPExt --> DockerRemote["Docker / Remote"]
In development, Vite (:5173) proxies /api to the Go server.
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 Changed · +5 tokens per session 850f4827e87c
- 1mo ago Changed · +3 lines · +147 tokens per session e577869eee28
- 1mo ago Changed · +2 lines · +72 tokens per session f1bad391d404
- 1mo ago Changed · +1 lines · +81 tokens per session 32ac52d229db
- 2mo ago First seen · 200 lines · 2,763 tokens per session scan A 4fffbe1ec465
nui CLAUDE.md is an instructions file published in the GitHub repository plmbr/nui (8 stars, last pushed 1mo ago), licensed MIT. It adds 3,068 tokens to every session, about $0.0123 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 2026-08-31.
Other instructions, from other repositories
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).
deno copilot-instructions.md
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.