Borrowing it
Nothing to install: this file belongs to artemnovichkov/Octavo. 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/artemnovichkov/Octavo/main/CLAUDE.mdgit clone --depth 1 https://github.com/artemnovichkov/OctavoWrote 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/artemnovichkov/octavo/claude-md)<a href="https://agentmods.dev/instructions/artemnovichkov/octavo/claude-md"><img src="https://agentmods.dev/badge/instructions/artemnovichkov/octavo/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/artemnovichkov/octavo/claude-md"><img src="https://agentmods.dev/badge/instructions/artemnovichkov/octavo/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 | $0.05343 | $0.05343 |
| Opus 5.5 | $0.02137 | $0.02137 |
| Sonnet 5.5 | $0.01069 | $0.01069 |
| Haiku 4.5 | $0.00534 | $0.00534 |
Grade C, and why
Octavo CLAUDE.md scanned grade C 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 7d 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.
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/Caches/Octavo/converted` after touching a writer, or you will test the last How it starts
The opening of the file, as written. The whole thing — 303 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.
What this is
Octavo — a native macOS replacement for calibre (1 GB) whose job is syncing an ebook library to a
Kindle Paperwhite 12 and editing metadata. SwiftPM package, no external dependencies: MTP is written
directly on IOUSBHost, SQLite and zlib come from the SDK. The built .app is ~3.8 MB: 1.7 MB of it is
the original binary, then Octavo.icns, then the AZW3/KF8 writer.
Two icons exist side by side, drawn by sibling scripts from the same sheet/dog-ear geometry:
Resources/Octavo.icns (make-icon.swift), which make-app.sh's release build embeds, and
Resources/Octavo.icon (make-liquid-icon.swift), a Liquid Glass .icon bundle — icon.json plus
a transparent-background glyph PNG in Assets/, editable in Icon Composer.app (ships inside
Xcode 26) — which only the Tuist-generated Octavo.xcworkspace target consumes, via
ASSETCATALOG_COMPILER_APPICON_NAME in Project.swift. The plate is not rasterized for the
.icon: its gradient is fill/fill-specializations in icon.json, and the system renders the
rounded-square mask, glass material and specular sheen around the one foreground glyph layer.
It operates in place on the user's real calibre library at ~/Calibre Library (42 books) — same
metadata.db, same folder layout, so calibre keeps working alongside it.
calibre the application is not required. CalibreLibraryStore.create(at:) lays down calibre's
own schema (CalibreSchema.sql, copied verbatim from metadata_sqlite.sql, user_version=26), so
a library Octavo made opens in calibre later with no migration. Which library is open is resolved by
LibraryLocation: the path remembered under LibraryRoot in the org.octavo.Octavo defaults suite
(a suite, not .standard, so the CLIs see what the app sees), else ~/Calibre Library if it exists,
else nothing — and nothing is the welcome screen (AppModel.LibraryState.needsSetup), which is
deliberately distinct from .failed: one offers to create a library, the other reports a broken one.
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.
- 7d ago Changed · +40 lines · +852 tokens per session d2f229b2e387
- 1mo ago Changed · +11 lines · +234 tokens per session 58ff17e05fb0
- 2mo ago First seen · 252 lines · 4,257 tokens per session scan C 881a794627c8
Octavo CLAUDE.md is an instructions file published in the GitHub repository artemnovichkov/Octavo (26 stars, last pushed 7d ago), licensed MIT. It adds 5,343 tokens to every session, about $0.0214 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Octavo CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| Octavo CLAUDE.mdartemnovichkov/Octavo | Instructions file | 26 | 7d ago | MIT | C | 5,343 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,649 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |