Borrowing it
Nothing to install: this file belongs to chrishutchinson/claude-receipts. 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/chrishutchinson/claude-receipts/main/CLAUDE.mdgit clone --depth 1 https://github.com/chrishutchinson/claude-receiptsWrote 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/chrishutchinson/claude-receipts/claude-md)<a href="https://agentmods.dev/instructions/chrishutchinson/claude-receipts/claude-md"><img src="https://agentmods.dev/badge/instructions/chrishutchinson/claude-receipts/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/chrishutchinson/claude-receipts/claude-md"><img src="https://agentmods.dev/badge/instructions/chrishutchinson/claude-receipts/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 | $0.01359 | $0.01359 |
| Opus 5 | $0.00679 | $0.00679 |
| Sonnet 5 | $0.00272 | $0.00272 |
| Haiku 4.5 | $0.00136 | $0.00136 |
Grade B, and why
claude-receipts CLAUDE.md scanned grade B with 1 finding 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 10d 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- `setup.ts` - Modifies `~/.claude/settings.json` to install SessionEnd hook How it starts
The opening of the file, as written. The whole thing — 162 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 Overview
claude-receipts is an NPM package that generates beautiful thermal printer-style receipts for Claude Code usage sessions. It integrates with Claude Code's SessionEnd hook to automatically create HTML receipts that open in the browser when a coding session ends.
Development Commands
# Build TypeScript to JavaScript
npm run build
# Watch mode for development
npm run dev
# Test the CLI locally (after building)
node bin/claude-receipts.js generate
node bin/claude-receipts.js generate --output html
node bin/claude-receipts.js config --show
node bin/claude-receipts.js setup
# Install locally for testing as if installed globally
npm link
claude-receipts generate
# Prepare for publishing
npm run prepublishOnly # Runs build automatically
Architecture
Data Flow
The package operates in two modes:
- Hook Mode (automatic): SessionEnd hook → stdin JSON → generate HTML → open browser
- Manual Mode: CLI command → fetch recent session → output to console/HTML
SessionEnd Hook
↓ (stdin with session_id, transcript_path)
GenerateCommand
↓
DataFetcher (calls ccusage CLI) + TranscriptParser (reads JSONL)
↓
ReceiptGenerator (creates text) + HtmlRenderer (creates styled HTML)
↓
Save to ~/.claude-receipts/projects/[session-slug].html + open browser
Key Components
Commands (src/commands/)
generate.ts- Main command; auto-detects if called from hook via stdinsetup.ts- Modifies~/.claude/settings.jsonto install SessionEnd hookconfig.ts- Manages user configuration at~/.claude-receipts.config.json
Core Logic (src/core/)
data-fetcher.ts- Executesnpx ccusage session --json --breakdownto get usage datatranscript-parser.ts- Parses~/.claude/projects/[path].jsonlfor session metadata (slug, timestamps, message counts)receipt-generator.ts- Creates ASCII text receipt with Claude logo, location, costshtml-renderer.ts- Generates standalone HTML with embedded CSS (thermal printer aesthetic)config-manager.ts- Handles~/.claude-receipts.config.jsonI/O
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.
- 10d ago First seen · 162 lines · 1,359 tokens per session scan B a6913a9115b8
claude-receipts CLAUDE.md is an instructions file published in the GitHub repository chrishutchinson/claude-receipts (629 stars, last pushed 4mo ago), licensed MIT. It adds 1,359 tokens to every session, about $0.0068 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
vibe-coding-prompt-template backend.instructions.md
Instructions for KhazP/vibe-coding-prompt-template: Read AGENTS.md, agentdocs/techstack.md, and agentdocs/codepatterns.md.
vibe-coding-prompt-template tests.instructions.md
Instructions for KhazP/vibe-coding-prompt-template, a project described as: Templates and workflow for generating PRDs, Tech Designs, and MVP and more using LLMs for AI IDEs.
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.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).