Borrowing it
Nothing to install: this file belongs to ShawnBaek/kindle-weekly-letter. 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/ShawnBaek/kindle-weekly-letter/main/CLAUDE.mdgit clone --depth 1 https://github.com/ShawnBaek/kindle-weekly-letterWrote 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/shawnbaek/kindle-weekly-letter/claude-md)<a href="https://agentmods.dev/instructions/shawnbaek/kindle-weekly-letter/claude-md"><img src="https://agentmods.dev/badge/instructions/shawnbaek/kindle-weekly-letter/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/shawnbaek/kindle-weekly-letter/claude-md"><img src="https://agentmods.dev/badge/instructions/shawnbaek/kindle-weekly-letter/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 | $0.00802 | $0.00802 |
| Opus 5 | $0.00401 | $0.00401 |
| Sonnet 5 | $0.00160 | $0.00160 |
| Haiku 4.5 | $0.00080 | $0.00080 |
Grade A, and why
kindle-weekly-letter 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 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.
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.
How it starts
The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Kindle Weekly Letter
Automated weekly Kindle newsletter — AI research agents collect articles daily, compile into a readable EPUB book, and deliver to your Kindle every Sunday.
Quick Start
/setup-kindle # Configure email, Kindle, and scheduling
/collect-now # Start collecting articles immediately
/compile-now # Compile and send EPUB now
/add-topic React # Add a custom topic
/sources list # View all sources with votes
/sources vote ios "Hacking with Swift" # Upvote a source
Default Topics (6)
- English for Software Engineers
- AI Engineering News (CTO-level)
- iOS Engineering
- Travel App Business
- Singapore & Korea News (official publishers only)
- C++ / C / Rust / Python
Architecture
- Daily collection: 6 Agent subagents research topics in parallel, accumulate articles in
output/weekly/ - Sunday compilation: Compile all articles, get user approval, generate EPUB, send to Kindle
- Each topic targets 10 articles/week — agents stop when a topic hits 10
- Sources:
sources.json— community-curated, votable source list per topic - Skills:
.claude/skills/— slash commands for setup, topics, sources, manual triggers
File Structure
├── .claude/skills/ # Slash commands (/setup-kindle, /add-topic, etc.)
├── .claude-plugin/ # Plugin manifest for distribution
├── prompts/ # Agent prompts (read sources.json for source priorities)
│ ├── daily_collector.md # Daily collection orchestrator
│ ├── sunday_compiler.md # Sunday EPUB compilation orchestrator
│ └── agent_*.md # Per-topic research agents
├── src/
│ ├── epub_builder.py # EPUB generation (ebooklib + jinja2)
│ ├── email_sender.py # SMTP email sender
│ ├── article_store.py # Daily article accumulator with dedup
│ ├── content_formatter.py # HTML sanitization for Kindle
│ └── config.py # Topic definitions, email config
├── sources.json # Votable source list per topic
├── templates/ # EPUB Jinja2 templates
├── styles/kindle.css # Kindle-optimized CSS
└── output/ # Generated EPUBs and weekly article store
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 · 83 lines · 802 tokens per session scan A e0ee35bc7a57
kindle-weekly-letter CLAUDE.md is an instructions file published in the GitHub repository ShawnBaek/kindle-weekly-letter (2 stars, last pushed 5mo ago), licensed MIT. It adds 802 tokens to every session, about $0.0040 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 2026-08-31.
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