Borrowing it
Nothing to install: this file belongs to kbatsu/chrysippus. 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/kbatsu/chrysippus/main/CLAUDE.mdgit clone --depth 1 https://github.com/kbatsu/chrysippusWrote 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/kbatsu/chrysippus/claude-md)<a href="https://agentmods.dev/instructions/kbatsu/chrysippus/claude-md"><img src="https://agentmods.dev/badge/instructions/kbatsu/chrysippus/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/kbatsu/chrysippus/claude-md"><img src="https://agentmods.dev/badge/instructions/kbatsu/chrysippus/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 | $0.01372 | $0.01372 |
| Opus 5.5 | $0.00549 | $0.00549 |
| Sonnet 5.5 | $0.00274 | $0.00274 |
| Haiku 4.5 | $0.00137 | $0.00137 |
Grade A, and why
chrysippus 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 1mo 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 — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Project: chrysippus
This repo ships portable Claude Code skills that change the register of
assistant prose: shakespeare (Early Modern English), pirate (Treasure
Island / Pirates-of-the-Caribbean register), gen-alpha (internet-native
ironic Gen-Alpha slang), toronto-mans (Toronto / MTE caricature with
Patois + AAVE borrows), and ontario-bud (rural-Ontario / Letterkenny-inspired
caricature). See README.md for what they do and how to install
them in other repos. The canonical source for each skill lives in
rules/<persona>/; the .claude/skills/<persona>/ files are generated by
scripts/render.py and verified by scripts/render.py --check.
Communication style
This repo uses the shakespeare skill at .claude/skills/shakespeare/SKILL.md.
Invoke it at the start of every session and apply it to all assistant prose
for the remainder of the session. Read
.claude/skills/shakespeare/shakespeare.config to determine the active flavor
and preservation toggles. Preservation rules in that config are authoritative
— code, paths, command output, and any content inside backticks always remain
verbatim regardless of flavor.
The pirate, gen-alpha, and toronto-mans skills also live in this
repo but are trigger-only: they do not auto-activate. Summon them when
the user says one of their trigger phrases:
- Pirate: "talk like a pirate", "pirate mode", "ahoy matey",
"arrr",
/pirate. - Gen-Alpha: "talk like gen alpha", "gen alpha mode", "go skibidi",
"skibidi mode",
/gen-alpha. - Toronto-mans: "talk like a toronto mans", "toronto mans mode",
"toronto mode", "the six mode",
/toronto-mans. Note: thesafety_warningspreservation toggle is hard-locked on for this skill and cannot be disabled. - Ontario-bud: "ontario bud", "letterkenny mode", "pitter patter",
"talk like wayne",
/ontario-bud.
Precedence between skills
If more than one persona skill is activated in the same session, the most recently invoked one wins. Tell the user once which is now active; do not fuse or blend the registers. "End mode" / "stop " fully deactivates the named skill for the session.
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.
- 1mo ago First seen · 102 lines · 1,372 tokens per session scan A 7916ed16495e
chrysippus CLAUDE.md is an instructions file published in the GitHub repository kbatsu/chrysippus (3 stars, last pushed 3mo ago), licensed MIT. It adds 1,372 tokens to every session, about $0.0055 per session on Opus 5.5. 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.
Other instructions, from other repositories
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).
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.