rubber-duckie: Instructions file for Claude Code

CLAUDE.md

rubber-duckie CLAUDE.md is an instructions file for Claude Code from AlexandrosGounis/rubber-duckie. It costs 1,136 tokens per session, scanned C, original, MIT.

Repository instructions for Rubber Duckie, a macOS Electron app that lets Claude operate the computer and schedule unattended coding tasks.

In plain words
What is it for?
Use them when working on the Electron interface, task scheduler, Claude CLI integration, tests, builds, or macOS packaging.
Why use it?
They explain the app's architecture, commands, and required development conventions so agents can change it safely.

Instructions file for Claude Code

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

This is AlexandrosGounis/rubber-duckie's own configuration. It tells Claude Code how to work on rubber-duckie 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 rubber-duckie configures →

Reuse

Borrowing it

Nothing to install: this file belongs to AlexandrosGounis/rubber-duckie. 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/AlexandrosGounis/rubber-duckie/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/AlexandrosGounis/rubber-duckie

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Per session 1,136 This file is loaded in full into every session.
When invoked 1,136 The same file — it is already loaded in full.
Security scan C 2 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 $0.01136 $0.01136
Opus 5 $0.00568 $0.00568
Sonnet 5 $0.00227 $0.00227
Haiku 4.5 $0.00114 $0.00114

Measured 12d ago against content hash 2252fd5b033a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade C, and why

rubber-duckie CLAUDE.md scanned grade C with 2 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 12d 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

- `src/main/claude/` — CLI plumbing: `bin.ts` (PATH-safe binary resolution — GUI apps miss `~/.local/bin`; every spawn must use `claudeBin()` + `spawnEnv()`), `check.ts`/`status.ts` (install + `claude auth status --json`

Makes network callslowCapability

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

- `src/main/claude/` — CLI plumbing: `bin.ts` (PATH-safe binary resolution — GUI apps miss `~/.local/bin`; every spawn must use `claudeBin()` + `spawnEnv()`), `check.ts`/`status.ts` (install + `claude auth status --json`
CLAUDE.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 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.

Project

Rubber Duckie (package name: rubber-duckie) — a macOS Electron app with two faces:

  1. Duckie spotlight — an always-on-top liquid-glass panel (the visible app). Type a task and Claude drives the real mouse/keyboard via the mac_input native addon (AX snapshots + CGEvents), narrating progress in the HUD.
  2. Task scheduler — persistent prompts that run through the claude CLI unattended on a schedule, with per-run NDJSON logs, reports, diffs, and a session chat. Autopilot rules can auto-queue tasks from GitHub/Jira/Trello/Asana.

Everything executes through the Claude Code CLI — there is no direct API integration and no API key.

Commands

yarn dev              # Electron app with hot reload
yarn build            # Typecheck + electron-vite build
yarn build:mac        # macOS distributable
yarn test             # vitest run (tests/ — single file: yarn vitest run tests/scheduler.test.ts)
yarn lint             # ESLint with cache
yarn typecheck        # typecheck:node + typecheck:web

Use yarn, not npm.

Architecture

  • src/main/index.ts — lean bootstrap: dotenv (.dev.vars then .env), windows, tray, runtime, IPC, startup gate.
  • src/main/app/ — hidden main window + broadcast() (windows.ts), scheduler/automation singletons (runtime.ts), tray + menu (tray.ts).
  • src/main/ipc/ — all ipcMain handlers, one module per domain (claude, onboarding, tasks, computer, integrations, logs, chat, misc).
  • src/main/claude/ — CLI plumbing: bin.ts (PATH-safe binary resolution — GUI apps miss ~/.local/bin; every spawn must use claudeBin() + spawnEnv()), check.ts/status.ts (install + claude auth status --json), login.ts (in-app claude auth login), install.ts (in-app curl | bash installer), runner.ts (detached scheduled runs, stream-json logs), enhance.ts, terminal.ts.
  • src/main/onboarding/ — standalone liquid-glass onboarding window + macOS permission checks (Accessibility via the native addon; deep-links to System Settings panes).
  • src/main/computer/ — the perceive→act loop (loop.ts orchestrator + split modules), glass HUD windows (overlay.ts barrel over hud/), native addon wrapper (native.ts).
  • src/main/agents/AgentScheduler (barrel scheduler.ts over scheduler-core/run-lifecycle/session-runs/…), persistence to agents.json.
  • src/main/integrations/, src/main/automations/ — provider OAuth/tasks + Autopilot engine.
  • src/preload/api.ts (the whole window.api surface) + index.ts bridge; types in index.d.ts.
  • src/renderer/src/ — React 19, plain co-located CSS (no Tailwind). main.tsx routes #onboarding to the onboarding window; everything else renders App. The main timeline window currently stays hidden — the duckie panel and onboarding window are the visible surfaces.
  • src/shared/ — types + parsers shared by main/renderer (stream-log, run-report, schedule, claude, permissions, computer).
  • native/src/mac_input.mm (AX capture, CGEvent input, accessibility checks) and glass_sidebar.mm (NSGlassEffectView panels). Build output in native/build/ is gitignored.

Read the full file on GitHub · 59 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. 12d ago First seen · 59 lines · 1,136 tokens per session scan C 2252fd5b033a

Subscribe to this mod's changes

rubber-duckie CLAUDE.md is an instructions file published in the GitHub repository AlexandrosGounis/rubber-duckie (9 stars, last pushed 1mo ago), licensed MIT. It adds 1,136 tokens to every session, about $0.0057 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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