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ARC: Instructions file for Claude Code

CLAUDE.md

ARC CLAUDE.md is an instructions file for Claude Code from Codename-11/ARC. It costs 1,211 tokens per session, scanned A, original, MIT.

Repository instructions for ARC, a command-line and terminal interface for managing multiple AI coding-agent profiles. Profiles keep settings, credentials, and environments separate.

In plain words
What is it for?
Building or modifying ARC features such as profiles, sessions, tasks, skills, settings, synchronization, telemetry, and troubleshooting screens.
Why use it?
They explain the project’s architecture and conventions so changes fit its command interface, terminal screens, setup flow, and repair tools.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code; mentions Codex.

This is Codename-11/ARC's own configuration. It tells Claude Code how to work on ARC itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ARC configures →

not rated 4repo 4mo ago A scan 1,211 tokens original MIT
View source ↗ Codename-11/ARC arc-cli.dev
Reuse

Borrowing it

Nothing to install: this file belongs to Codename-11/ARC. 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/Codename-11/ARC/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/Codename-11/ARC

Made for: Claude Code.

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Per session 1,211 This file is loaded in full into every session.
When invoked 1,211 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01211 $0.01211
Opus 5.5 $0.00484 $0.00484
Sonnet 5.5 $0.00242 $0.00242
Haiku 4.5 $0.00121 $0.00121

Measured 1mo ago against content hash 7add82f6b7f6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ARC 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.

CLAUDE.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — ARC Project

What is ARC?

ARC (Agent Runtime Control) is a CLI + TUI for managing multiple agent profiles (Claude Code, Gemini CLI, Codex CLI, etc.) with isolated configs, credentials, and environments.

Architecture

  • CLI layer: Commander.js commands in src/commands/
  • TUI layer: Ink + React components in src/tui/
    • Views: Dash, Work (session), Profiles, Doctor, Settings, Guide (in-app docs), Tasks, Memory, Skills, Sync, Telemetry (Traces), Agents
    • Overlays: CreateProfileOverlay, HelpOverlay, CommandPalette, SwapOverlay, SharedDetailOverlay, ProfileInfoOverlay, Update overlay
    • OnboardingScreen: fullscreen first-run wizard with multi-select tool import, optional rename, batch import
    • Workspace shell: tokenized input with syntax highlighting (/command green, @profile blue, #tag dimmed) and auto-complete overlay (Tab/Enter accept, arrows navigate); runs shell commands with profile env; / commands for ARC actions
    • Input components: TokenizedInput (tokenizer + colored rendering), AutoComplete (suggestion resolver + overlay)
    • Doctor repair actions: install hints, re-auth instructions, PATH/shell fix hints displayed inline
    • Shared layer controls: h key in ProfilesView toggles shared layer per profile; sync status in SettingsView and ProfileList
    • Credential hot-swap: SwapOverlay (src/tui/views/SwapOverlay.tsx) — capture/swap/delete via command palette. [experimental]
    • Update system: DashView shows update-available banner; u key triggers in-app update overlay
    • Scrollable views: ScrollBox component (src/tui/components/ScrollBox.tsx) for arrow-key scrolling
  • Update module: src/update.ts — cached npm registry check, self-update via npm install -g
  • Credential hot-swap: src/swap.ts — [experimental] swap auth credentials in canonical tool dir without changing MCPs/settings/history. CLI: arc swap capture/to/list/delete. TUI: SwapOverlay via command palette
  • Shared layer: src/shared.ts — syncs MCP servers, commands, CLAUDE.md, memory, and projects across profiles via ~/.arc/shared/. Pull/push with cross-tool warnings.
  • Import utilities: src/import-utils.ts — shared skip list, auth detection, entry descriptions
  • Wizard types: src/tui/wizardTypes.ts — shared step types and metadata helpers for profile creation wizards
  • Activity log: src/log.ts — timestamped action log to ~/.arc/activity.log
  • Single entry point: src/index.ts → src/cli.ts
  • Bundled output: tsup produces a single dist/index.js with shebang
  • Landing site: site/ — React 19 + Vite + Tailwind v4, Nothing-design marketing page
  • Deployment: Root Dockerfile + nginx.conf — multi-stage build merging site/ at / and user-docs/ at /docs/ into single nginx container
  • Web Dashboard: 13 view components (Overview, Sessions, Traces, Risk, Tasks, Skills, Memory, Agents, Factory + Profiles, Diagnostics, Sync, Plugins)
  • Orchestration layer: Hook pipeline (8 hooks in priority order), roundtable multi-agent discussions, task delegation protocol, interagent routing, source classification
  • Adapters: Claude Code (SDK + plugin + hooks), Codex CLI, Gemini CLI, OpenClaw (native plugin), Hermes Agent (MCP bridge), Generic (fallback for any tool)

Read the full file on GitHub · 74 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.

  1. 1mo ago First seen · 74 lines · 1,211 tokens per session scan A 7add82f6b7f6

Subscribe to this mod's changes

ARC CLAUDE.md is an instructions file published in the GitHub repository Codename-11/ARC (4 stars, last pushed 4mo ago), licensed MIT. It adds 1,211 tokens to every session, about $0.0048 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.

Claude Codeagent-managementai-agentsclicodex-clideveloper-tools
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