Borrowing it
Nothing to install: this file belongs to rnixai/rnix. 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/rnixai/rnix/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/rnixai/rnixWrote 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/rnixai/rnix/copilot-instructions)<a href="https://agentmods.dev/instructions/rnixai/rnix/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/rnixai/rnix/copilot-instructions/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/rnixai/rnix/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/rnixai/rnix/copilot-instructions.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 | $0.01564 | $0.01564 |
| Opus 5.5 | $0.00626 | $0.00626 |
| Sonnet 5.5 | $0.00313 | $0.00313 |
| Haiku 4.5 | $0.00156 | $0.00156 |
Grade A, and why
rnix copilot-instructions.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 156 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot Instructions for Rnix
Project Overview
Rnix is an operating system for AI agents, inspired by Unix design philosophy. Written in Go 1.26 (github.com/rnixai/rnix). It provides process management, a virtual filesystem (VFS), IPC via Unix domain sockets, multi-agent orchestration, intent decomposition, and debugging tools.
语言
- 回复语言使用简体中文
- 代码注释使用英文
Build & Test Commands
make build # Build binary → ./rnix
make test # Run all tests with race detection
make lint # golangci-lint
make vet # go vet
make all # lint + vet + modernize-check + test + build
# Single test
go test -race -run TestFunctionName ./package/...
# Package tests
go test -race ./kernel/...
go test -race ./ipc/...
Run make all after finishing any coding work to catch errors.
Architecture
Daemon Model
Rnix runs as a background daemon holding the kernel and process table. CLI commands communicate over a Unix domain socket ($XDG_RUNTIME_DIR/rnix/rnix.sock or /tmp/rnix-$UID/rnix.sock). The CLI auto-starts the daemon via EnsureDaemon().
Core Data Flow
CLI (cmd/rnix) → IPC Client → Unix Socket → IPC Server → Kernel
↓
Process ReasonStep Loop
↓ ↑
VFS Devices Context
(LLM, FS, Shell, MCP)
Package Hierarchy
cmd/rnix ← Entry point, Cobra CLI
├── ipc ← Client/Server, NDJSON protocol over Unix socket
├── kernel ← Microkernel: process table, spawn, kill, wait, reaper
│ ├── vfs ← VFS file abstraction, device registry, FD table
│ ├── context ← Per-process conversation history (CtxAlloc/Write/BuildPrompt)
│ └── debug ← Strace, recording, distributed tracing, GDB
├── drivers/ ← VFS device implementations
│ ├── llm ← /dev/llm/* (Claude CLI, Cursor CLI, HTTP API providers)
│ ├── fs ← /dev/fs - sandboxed host filesystem
│ ├── shell ← /dev/shell - subprocess execution
│ └── mcp ← /dev/mcp/* - MCP server stdio transport
├── intent ← Declarative intent decomposition
├── compose ← DAG-based multi-agent orchestration from YAML
├── shell ← AgentShell scripting language
├── agents ← Agent loader (lib/agents/{name}/agent.yaml + instructions.md)
├── skills ← Skill loader (lib/skills/{name}/SKILL.md with YAML frontmatter)
├── skillpkg ← Skill package management (install/search/update from registry)
└── internal/ ← Shared utilities
├── types ← PID, FD, CtxID, Signal, ProcessState, ErrCode
├── xsync ← Thread-safe SyncMap, Registry, Future
└── ui ← Terminal rendering, progress reporting
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 · 156 lines · 1,564 tokens per session scan A f53efdc3658a
rnix copilot-instructions.md is an instructions file published in the GitHub repository rnixai/rnix (6 stars, last pushed 3mo ago), licensed MIT. It adds 1,564 tokens to every session, about $0.0063 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.
rnix copilot-instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| rnix copilot-instructions.mdrnixai/rnix | Instructions file | 6 | 3mo ago | MIT | A | 1,564 | GitHub Copilot |
| 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 |