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 skills add rnixai/rnix --skill using-rnixgit 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/skills/rnixai/rnix/using-rnix)<a href="https://agentmods.dev/skills/rnixai/rnix/using-rnix"><img src="https://agentmods.dev/badge/skills/rnixai/rnix/using-rnix/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/skills/rnixai/rnix/using-rnix"><img src="https://agentmods.dev/badge/skills/rnixai/rnix/using-rnix.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 | $0.00162 | $0.02414 |
| Opus 5.5 | $0.00065 | $0.00966 |
| Sonnet 5.5 | $0.00032 | $0.00483 |
| Haiku 4.5 | $0.00016 | $0.00241 |
Grade A, and why
using-rnix 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 1mo 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 — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Using Rnix
Rnix is an operating system for AI agents — "the AI-Era Unix". You drive it
with a single CLI, rnix, the way you drive Unix with ps, kill, and
strace. This skill gives you rnix's capability map and the exact commands to
run, so you can accomplish a task with rnix without reading its source.
If you already know Unix, you already know most of rnix. The novelty is what the processes are: each one is an AI agent reasoning in a loop.
Mental model
Three ideas explain almost everything:
- Everything is a Process. Every agent run is a first-class process with a
PID, a state machine (Created → Running → Suspended/Zombie → Dead), and a
resource table. You list them with
ps, end them withkill, watch them withstrace— the same verbs you already know. Processes can be suspended, resumed, and forked from checkpoints. - Everything is a File. LLMs, the filesystem, the shell, agent memory, web
search, code intelligence (LSP), and MCP tools are all exposed as virtual
devices behind a uniform file interface. Adding a capability is mounting a
device. (The concrete device catalog lives in
references/architecture.md— you rarely need it just to drive rnix.) - Orchestration is process management. Multi-agent workflows are DAGs of
processes (
compose); high-level goals are decomposed into sub-task DAGs (intent/apply); supervisor trees restart crashed agents. These are OS primitives, not application glue.
Daemon model — read this once. A background daemon holds the kernel and the
process table; the CLI talks to it over a Unix domain socket. Commands that
create work (rnix -i, rnix apply, rnix compose up, rnix run) auto-start
the daemon on first use. Passive query, attach, or lifecycle commands such as
rnix ps, rnix strace, rnix suspend, and rnix resume dial the existing
daemon; if it is stopped, start one with rnix daemon start or run a spawning
command first. Because the daemon is shared, a process you spawn in one terminal
is visible to rnix ps in another. Manage it explicitly with
rnix daemon status / rnix daemon stop.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 183 lines · 162 tokens per session scan A ce93b1fc2029
using-rnix is a skill published in the GitHub repository rnixai/rnix (5 stars, last pushed 2mo ago), licensed MIT. It adds 162 tokens to every session and 2,414 once invoked, about $0.0006 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.
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