Borrowing it
Nothing to install: this file belongs to mycrl/turn-rs. 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/mycrl/turn-rs/main/AGENTS.mdgit clone --depth 1 https://github.com/mycrl/turn-rsWrote 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/mycrl/turn-rs/agents-md)<a href="https://agentmods.dev/instructions/mycrl/turn-rs/agents-md"><img src="https://agentmods.dev/badge/instructions/mycrl/turn-rs/agents-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/mycrl/turn-rs/agents-md"><img src="https://agentmods.dev/badge/instructions/mycrl/turn-rs/agents-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 | $0.03098 | $0.03098 |
| Opus 5.5 | $0.01239 | $0.01239 |
| Sonnet 5.5 | $0.00620 | $0.00620 |
| Haiku 4.5 | $0.00310 | $0.00310 |
Grade A, and why
turn-rs AGENTS.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 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.
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 — 290 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
This document targets two audiences:
- LLMs/agents: quickly understand project structure, entry points, run flow, configuration, and risks.
- Human developers/operators: follow the steps to build, configure, start, and verify the service.
Project Overview
turn-rs is a TURN/STUN server implemented in Rust for WebRTC NAT traversal and media relay. It focuses on high performance and low configuration cost, and provides optional gRPC management APIs, Prometheus metrics, and Hook callbacks.
Core Capabilities
- TURN/STUN protocol support with TCP/UDP transport.
- Long-term credential mechanism with static users and hook-based dynamic auth.
- Optional gRPC management API and Prometheus metrics exporter.
- Multi-interface listeners and external address announcement.
Key Entry Points and Directories
- Runtime entry: src/main.rs
- Library entry: src/lib.rs
- Service and session logic: src/service
- Protocol handling and codecs: src/codec
- Transport providers (UDP/TCP): src/server/provider
- Config and logging: src/config.rs, src/logger.rs
- gRPC API and client SDK: sdk/protos/server.proto, sdk/src/lib.rs
- Sample config: turn-server.toml
- Docs entry: docs/README.md
Source Code Architecture (Modules and Responsibilities)
This section explains how the server is organized internally and how the main data flow works.
High-level runtime flow
-
src/main.rs loads config, initializes logging, and builds the Tokio runtime.
-
src/lib.rs
start_server()constructsStatistics, aHandler, and aService, then spawns:
- transport servers (UDP/TCP) via src/server
- optional Prometheus exporter via src/prometheus.rs
- optional gRPC API via src/api.rs
Core modules
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 Changed · +3 lines · +2 tokens per session e226a3f97840
- 2mo ago First seen · 287 lines · 3,096 tokens per session scan A a1803b6e7d01
turn-rs AGENTS.md is an instructions file published in the GitHub repository mycrl/turn-rs (519 stars, last pushed 3d ago), licensed MIT. It adds 3,098 tokens to every session, about $0.0124 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 2026-08-30.
turn-rs AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| turn-rs AGENTS.mdmycrl/turn-rs | Instructions file | 519 | 3d ago | MIT | A | 3,098 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |