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/jperrello/saturn/agents-mdgit clone --depth 1 https://github.com/jperrello/SaturnWhat 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 | $0.00350 | $0.00350 |
| Opus 5 | $0.00175 | $0.00175 |
| Sonnet 5 | $0.00070 | $0.00070 |
| Haiku 4.5 | $0.00035 | $0.00035 |
Grade A, and why
Saturn AGENTS.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 2d 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.
resp = requests.post(f"{best.endpoint}/v1/chat/completions", json={ What it actually says
Saturn — Agent Integration Guide
Saturn discovers AI services on the local network via mDNS. No API keys, no configuration, no accounts.
How to use Saturn
Python
from saturn import discover, select_best_service
import requests
services = discover(timeout=5.0)
best = select_best_service(services)
resp = requests.post(f"{best.endpoint}/v1/chat/completions", json={
"model": "openai/gpt-4o",
"messages": [{"role": "user", "content": "Hello"}],
})
TypeScript (AI SDK)
npm install ai-sdk-provider-saturn
Shell (no dependencies)
dns-sd -B _saturn._tcp local
dns-sd -L <service_name> _saturn._tcp local
curl -X POST http://<resolved_host>:<port>/v1/chat/completions \
-H "Content-Type: application/json" \
-d '{"model": "openai/gpt-4o", "messages": [{"role": "user", "content": "Hello"}]}'
Endpoints
All Saturn services are OpenAI-compatible:
GET /v1/healthGET /v1/modelsPOST /v1/chat/completions(supports streaming SSE)
Why Saturn exists
AI services gate access behind per-user subscriptions and API keys. Saturn moves access to the network level: one administrator configures a server, every device on the network discovers it automatically via _saturn._tcp.local. mDNS advertisements. End users perform zero configuration steps.
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.
- 2d ago First seen · 45 lines · 350 tokens per session scan A 5eccc9770dd0
Saturn AGENTS.md is an instructions file published in the GitHub repository jperrello/Saturn (10 stars, last pushed 3mo ago), licensed MIT. It adds 350 tokens to every session, about $0.0018 per session on Opus 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.
Other instructions, from other repositories
lad CLAUDE.md
Instructions for franzvill/lad, covering claude.md, project overview, common commands, reference implementation and run tests (conformance, security, and v0.2 hardening).
kubefwd CLAUDE.md
Instructions for txn2/kubefwd, covering claude.md, project overview, integration and usage patterns, tui (terminal user interface) and tui features.
Tutorial_AwesomeModernCPP AGENTS.md
Instructions for Awesome-Embedded-Learning-Studio/Tutorial_AwesomeModernCPP, covering agents.md, 这是什么, 通用 essentials(所有 agent 必读) and 你来做什么?(按场景路由).
MCP-Packet-Tracer AGENTS.md
Instructions for Mats2208/MCP-Packet-Tracer, covering agents.md, what this is, build and test, layout and rules that are not negotiable.
unifly AGENTS.md
Instructions for hyperb1iss/unifly, covering agents.md, what this repository is, quick command reference, the canonical "before commit" gate and individual gates.
hier_config AGENTS.md
AGENTS.md instructions for netdevops/hier_config, covering hierconfig — agent & contributor guide, project overview, build & test commands, full lint + test suite (what ci runs) and tests only (95% coverage required).