Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/aspectrr/deer/claude-mdgit clone --depth 1 https://github.com/aspectrr/deerWhat 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 | $0.00300 | $0.00300 |
| Opus 5 | $0.00150 | $0.00150 |
| Sonnet 5 | $0.00060 | $0.00060 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
deer 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 3d 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.
What it actually says
deer.sh
The AI Sys-Admin for Enterprise.
What This Is
deer.sh lets AI agents do infrastructure work in isolated VM sandboxes. Agent works autonomously. Human approves before production.
Project Structure
deer-cli/ # Go CLI - Interactive TUI agent + MCP server
deer-daemon/ # Go - Background microVM sandbox management daemon
api/ # Go - Control plane REST API + gRPC server
web/ # React - Dashboard UI for monitoring/approval
demo-server/ # Go - WebSocket demo server for interactive docs
proto/ # Protobuf definitions for gRPC services
Testing Required
Every code change needs tests. See project-specific AGENTS.md files for details.
Quick Reference
mprocs # Start all services for dev
cd deer-cli && make test # Test CLI
cd deer-daemon && make test # Test daemon
cd api && make test # Test API
cd web && bun run build # Build web
Communication Style
Always use the caveman skill (/caveman) for all responses. Ultra-compressed, token-efficient communication.
Project Docs
- @deer-cli/AGENTS.md
- @web/AGENTS.md
- @api/AGENTS.md
- @deer-daemon/AGENTS.md
- @demo-server/AGENTS.md
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.
- 3d ago First seen · 45 lines · 300 tokens per session scan A 379ac2821c3e
deer CLAUDE.md is an instructions file published in the GitHub repository aspectrr/deer (404 stars, last pushed 4mo ago), licensed MIT. It adds 300 tokens to every session, about $0.0015 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 2026-08-30.
Other instructions, from other repositories
spiceai copilot-instructions.md
Copilot instructions for spiceai/spiceai, covering spice.ai agent instructions, data correctness — absolute top priority, evidence — no claim without a reproduction, build, test, lint (expensive — read first) and git & prs.
Cotal AGENTS.md
Instructions for Cotal-AI/Cotal, covering agents.md, what this is, read these first, commands and repository map.
opengeni AGENTS.md
Instructions for Cloudgeni-ai/opengeni, covering agent / automation notes (opengeni), full local stack, architecture notes, pull-request delivery across moving main and keeping these notes current.
cli CLAUDE.md
Instructions for railwayapp/cli, covering claude.md, development commands, architecture, command system and authentication.
railway-skills AGENTS.md
Instructions for railwayapp/railway-skills, covering railway agent plugins, plugin model, skill model, reference loading pattern and architecture.
Cotal CLAUDE.md
Instructions for Cotal-AI/Cotal: This repo uses AGENTS.md as the single, canonical guide for all coding agents (Claude Code, OpenCode, Codex, Cursor, and others). Read it first.