agentmods.dev

shell-now CLAUDE.md

Project instructions for Shell Now, a Go command-line tool that creates public web terminals using ttyd and Cloudflare Quick Tunnels. They describe how to build, run, test, and structure the project.

In plain words
What is it for?
Use them when building the Go program, creating its Docker image, running debug mode, or changing its command-line and platform-specific components.
Why use it?
They give a coding agent the repository's expected commands and architecture. This helps it work within the project's platform-specific code and dependency setup.

Instructions file

48 1y ago A scan 497 tokens original MIT
View the source file STRRL/shell-now
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/strrl/shell-now/claude-md
Clone the repo
git clone --depth 1 https://github.com/STRRL/shell-now
Per session 497 This file is loaded in full into every session.
When invoked 497 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00497 $0.00497
Opus 5 $0.00249 $0.00249
Sonnet 5 $0.00099 $0.00099
Haiku 4.5 $0.00050 $0.00050

Measured 2d ago against content hash 4b3773d7df02, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

shell-now 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 2d 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 · 44 lines

What it actually says

CLAUDE.md

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

Project Overview

Shell Now is a Go CLI tool that creates instant public web terminals using ttyd and Cloudflare Quick Tunnels. The tool automatically downloads required dependencies (ttyd and cloudflared) and sets up a secure web-based shell accessible via a public URL.

Build Commands

  • make build or go build -o out/shell-now ./cmd/shell-now/ - Build the binary
  • DEBUG=1 ./out/shell-now - Run with debug logging enabled
  • docker build -t shell-now . - Build Docker image
  • docker run cr.strrl.dev/strrl/shell-now:latest - Run via Docker

Architecture

The codebase follows a simple CLI pattern with platform-specific implementations:

Core Components

  • cmd/shell-now/main.go - CLI entry point using Cobra, handles signals and context
  • pkg/bootstrap.go - Main orchestration logic that coordinates ttyd and cloudflared processes
  • Platform-specific preparation files (prepare_linux.go, prepare_darwin.go, prepare.go) that handle dependency installation

Key Architecture Points

  • Uses build tags for platform-specific code (//go:build !darwin && !linux)
  • Linux/ARM64 support with automatic binary downloads to ~/.local/bin/
  • macOS requires manual installation via Homebrew
  • Concurrent goroutines for ttyd and cloudflared with WaitGroup synchronization
  • Context-based cancellation for graceful shutdown on SIGINT/SIGTERM
  • Random port allocation for ttyd using net.Listen("tcp", ":0")
  • Random 6-digit password generation for web terminal authentication

Dependencies

  • Uses github.com/spf13/cobra for CLI framework
  • Downloads ttyd v1.7.7 and cloudflared 2025.5.0 on Linux
  • Expects ttyd and cloudflared via Homebrew on macOS

Platform Considerations

The tool has different behavior per platform:

  • Linux: Automatically downloads binaries to ~/.local/bin/ if not in PATH
  • macOS: Requires manual installation via brew install ttyd cloudflared
  • Other platforms: Requires manual installation with informational messages only
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. 2d ago First seen · 44 lines · 497 tokens per session scan A 4b3773d7df02

Subscribe to this mod's changes

shell-now CLAUDE.md is an instructions file published in the GitHub repository STRRL/shell-now (48 stars, last pushed 1y ago), licensed MIT. It adds 497 tokens to every session, about $0.0025 per session on Opus 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.

DebuggingDevOps and cloudTestingcloudflarecloudflare-tunneldevtoolsttydweb-terminalwebshell
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