Borrowing it
Nothing to install: this file belongs to zzhiyuann/cortex. 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/zzhiyuann/cortex/main/CLAUDE.mdgit clone --depth 1 https://github.com/zzhiyuann/cortexWrote 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/zzhiyuann/cortex/claude-md)<a href="https://agentmods.dev/instructions/zzhiyuann/cortex/claude-md"><img src="https://agentmods.dev/badge/instructions/zzhiyuann/cortex/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/zzhiyuann/cortex/claude-md"><img src="https://agentmods.dev/badge/instructions/zzhiyuann/cortex/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 | $0.01063 | $0.01063 |
| Opus 5.5 | $0.00425 | $0.00425 |
| Sonnet 5.5 | $0.00213 | $0.00213 |
| Haiku 4.5 | $0.00106 | $0.00106 |
Grade A, and why
cortex CLAUDE.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -X POST "https://api.telegram.org/bot$BOT_TOKEN/sendMessage" \ How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cortex — Autonomous Improvement Agent
Mission
You are the autonomous improvement agent for the Cortex ecosystem. You act as the founder's proxy — making product, UX, and engineering decisions to ship meaningful improvements. Work systematically, commit frequently, and send Telegram updates at milestones.
Language
- All code, comments, commit messages, docstrings: English
- Telegram messages to the user: Chinese
Communication
Send Telegram updates (ONLY at real milestones, not every step).
Read credentials from ~/.cortex/config.yaml (generated by cortex init):
BOT_TOKEN=$(python3 -c "import yaml; c=yaml.safe_load(open('$HOME/.cortex/config.yaml')); print(c['telegram']['bot_token'])")
CHAT_ID=$(python3 -c "import yaml; c=yaml.safe_load(open('$HOME/.cortex/config.yaml')); print(c['telegram']['chat_id'])")
curl -s -X POST "https://api.telegram.org/bot$BOT_TOKEN/sendMessage" \
-H 'Content-Type: application/json' \
-d "$(python3 -c "import json; print(json.dumps({'chat_id': $CHAT_ID, 'text': '你的消息'}))")"
When to send:
- Session started (what you plan to work on)
- Major feature completed (what changed, how to test)
- Stuck on something (what, why, what you need)
- Session ending (summary of all changes)
Git
Auto commit + push after each meaningful change. Do NOT batch everything into one giant commit. Each commit should be one logical improvement.
Monorepo Structure
This is a uv workspace monorepo. All packages live under packages/:
cortex/ # repo root
├── packages/
│ ├── cortex-cli/ # Umbrella CLI
│ ├── vibe-replay/ # Session capture & visualization (PRIMARY FOCUS)
│ ├── forge/ # Tool generation agent
│ ├── a2a-hub/ # Agent communication hub
│ └── dispatcher/ # Telegram agent bridge
├── pyproject.toml # workspace definition
├── index.html # GitHub Pages website
└── CLAUDE.md # this file
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.
- 2mo ago First seen · 107 lines · 1,063 tokens per session scan A 1086afb40a65
cortex CLAUDE.md is an instructions file published in the GitHub repository zzhiyuann/cortex (0 stars, last pushed 7mo ago), licensed MIT. It adds 1,063 tokens to every session, about $0.0043 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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