What is 1code CLAUDE.md?

Project instructions for 1Code, a desktop app that provides AI help with local software projects.

Use them when planning or implementing substantial changes in the 1Code repository, including new features, architecture changes, or security work.

They tell an AI coding assistant when to read the project's proposal rules and which development commands and conventions to follow.

How 21st-dev/1code configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to 21st-dev/1code. 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/21st-dev/1code/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/21st-dev/1code

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/21st-dev/1code/claude-md/github.svg)](https://agentmods.dev/instructions/21st-dev/1code/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/21st-dev/1code/claude-md"><img src="https://agentmods.dev/badge/instructions/21st-dev/1code/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/21st-dev/1code/claude-md"><img src="https://agentmods.dev/badge/instructions/21st-dev/1code/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,703 This file is loaded in full into every session.

When invoked 2,703 The same file — it is already loaded in full.

Security scan D 3 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	$0.02703	$0.02703
Opus 5.5	$0.01081	$0.01081
Sonnet 5.5	$0.00541	$0.00541
Haiku 4.5	$0.00270	$0.00270

Measured 2mo ago against content hash 42b8690b2757, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade D, and why

1code CLAUDE.md scanned grade D with 3 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

fetch('http://localhost:7799/log',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({tag:'TAG',msg:'MESSAGE',data:{},ts:Date.now()})}).catch(()=>{});

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf ~/Library/Application\ Support/Agents\ Dev/

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**Clear logs:** `curl -X DELETE http://localhost:7799/logs`

CLAUDE.md · 275 lines

How it starts

The opening of the file, as written. The whole thing — 275 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenSpec Instructions

These instructions are for AI assistants working in this project.

Always open @/openspec/AGENTS.md when the request:

Mentions planning or proposals (words like proposal, spec, change, plan)
Introduces new capabilities, breaking changes, architecture shifts, or big performance/security work
Sounds ambiguous and you need the authoritative spec before coding

Use @/openspec/AGENTS.md to learn:

How to create and apply change proposals
Spec format and conventions
Project structure and guidelines

Keep this managed block so 'openspec update' can refresh the instructions.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What is this?

21st Agents - A local-first Electron desktop app for AI-powered code assistance. Users create chat sessions linked to local project folders, interact with Claude in Plan or Agent mode, and see real-time tool execution (bash, file edits, web search, etc.).

Commands

# Development
bun run dev              # Start Electron with hot reload

# Build
bun run build            # Compile app
bun run package          # Package for current platform (dir)
bun run package:mac      # Build macOS (DMG + ZIP)
bun run package:win      # Build Windows (NSIS + portable)
bun run package:linux    # Build Linux (AppImage + DEB)

# Database (Drizzle + SQLite)
bun run db:generate      # Generate migrations from schema
bun run db:push          # Push schema directly (dev only)

Architecture

src/
├── main/                    # Electron main process
│   ├── index.ts             # App entry, window lifecycle
│   ├── auth-manager.ts      # OAuth flow, token refresh
│   ├── auth-store.ts        # Encrypted credential storage (safeStorage)
│   ├── windows/main.ts      # Window creation, IPC handlers
│   └── lib/
│       ├── db/              # Drizzle + SQLite
│       │   ├── index.ts     # DB init, auto-migrate on startup
│       │   ├── schema/      # Drizzle table definitions
│       │   └── utils.ts     # ID generation
│       └── trpc/routers/    # tRPC routers (projects, chats, claude)
│
├── preload/                 # IPC bridge (context isolation)
│   └── index.ts             # Exposes desktopApi + tRPC bridge
│
└── renderer/                # React 19 UI
    ├── App.tsx              # Root with providers
    ├── features/
    │   ├── agents/          # Main chat interface
    │   │   ├── main/        # active-chat.tsx, new-chat-form.tsx
    │   │   ├── ui/          # Tool renderers, preview, diff view
    │   │   ├── commands/    # Slash commands (/plan, /agent, /clear)
    │   │   ├── atoms/       # Jotai atoms for agent state
    │   │   └── stores/      # Zustand store for sub-chats
    │   ├── sidebar/         # Chat list, archive, navigation
    │   ├── sub-chats/       # Tab/sidebar sub-chat management
    │   └── layout/          # Main layout with resizable panels
    ├── components/ui/       # Radix UI wrappers (button, dialog, etc.)
    └── lib/
        ├── atoms/           # Global Jotai atoms
        ├── stores/          # Global Zustand stores
        ├── trpc.ts          # Real tRPC client
        └── mock-api.ts      # DEPRECATED - being replaced with real tRPC

Read the full file on GitHub · 275 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 · 275 lines · 2,703 tokens per session scan D 42b8690b2757

Subscribe to this mod's changes

1code CLAUDE.md is an instructions file published in the GitHub repository 21st-dev/1code (5,573 stars, last pushed 8mo ago), licensed Apache-2.0. It adds 2,703 tokens to every session, about $0.0108 per session on Opus 5.5. A static security scan graded it D with 3 findings (sends data to an external url, recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

1code CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
1code CLAUDE.md21st-dev/1code	Instructions file	5.6k	8mo ago	Apache-2.0	D	2,703	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

1code: Instructions file for Claude Code