nio-config

nio-config is a skill for Claude Code from core0-io/nio. It costs 71 tokens per session (665 once invoked), scanned A, original, Apache-2.0.

A focused viewer and editor for Nio configuration, including its protection level.

In plain words
What is it for?
Use it to show the current configuration, set strict, balanced, or permissive protection, or reset the configuration.
Why use it?
It provides a defined way to inspect or change Nio settings without handling unrelated Nio operations.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: reads .claude/ paths.

Part of the nio plugin — 7 skills, 8 hooks shipped together

Good fit Use it to show the current configuration, set strict, balanced, or permissive protection, or reset the configuration.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/core0-io/nio/nio-config
Install

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.

Any agent
npx skills add core0-io/nio --skill nio-config
Clone the repo
git clone --depth 1 https://github.com/core0-io/nio

Made for: Claude Code.

Or install nio, the plugin that ships this one along with the rest of its 7 skills, 8 hooks.

Wrote 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.

agentmods badge for nio-config

README.md
[![agentmods](https://agentmods.dev/badge/skills/core0-io/nio/nio-config.svg)](https://agentmods.dev/skills/core0-io/nio/nio-config)
Your own site
<a href="https://agentmods.dev/skills/core0-io/nio/nio-config"><img src="https://agentmods.dev/badge/skills/core0-io/nio/nio-config.svg" alt="Measured on agentmods" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 665 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00071 $0.00665
Opus 5 $0.00036 $0.00332
Sonnet 5 $0.00014 $0.00133
Haiku 4.5 $0.00007 $0.00067

Measured 8d ago against content hash 96abb8358fb4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

nio-config 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 8d 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.

plugins/claude-code/skills/nio-config/SKILL.md · 44 lines

What it actually says

Nio — Configuration

View or update the Nio configuration. This is the focused config capability of the Nio framework. Configuration lives at ~/.nio/config.yaml (or $NIO_HOME/config.yaml).

Passive invocation. If the user asks to see their Nio config, check/change the protection level, or reset config, you MUST use the CLI below rather than describing settings from memory.

Resolving the Script Path

The CLI for this skill lives in the sibling nio skill, not in this skill's own directory:

  1. This SKILL.md's parent directory is THIS skill's directory (e.g. <plugins>/skills/nio-config/).
  2. The script is the sibling nio skill's scripts/config-cli.js — i.e. ../nio/scripts/config-cli.js relative to this directory. Derive the absolute path; do not hard-code ~/.claude/....
  3. Invoke with a single node command — no cd, no ;/&&/|/$(...)/backticks.

Routing

Input Action
config, show, or empty Run node ../nio/scripts/config-cli.js show and present the JSON
strict / balanced / permissive Read ~/.nio/config.yaml, update only guard.protection_level (preserve all other settings), write back, confirm to the user
reset Run node ../nio/scripts/config-cli.js reset

Protection Levels

Level allow confirm deny Behaviour
strict 0 – 0.5 0.5 – 1.0 Block all risky actions
balanced (default) 0 – 0.5 0.5 – 0.8 0.8 – 1.0 Block dangerous, confirm risky — good for daily use
permissive 0 – 0.9 0.9 – 1.0 Only block critical threats

For the full field reference (guard / collector sections, external_analyser, permitted/blocked tools, etc.) see the unified /nio config documentation. Set NIO_HOME to change the config directory (default: ~/.nio).

Changes

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.

  1. 8d ago First seen · 44 lines · 71 tokens per session scan A 96abb8358fb4

Subscribe to this mod's changes

nio-config is a skill published in the GitHub repository core0-io/nio (19 stars, last pushed 17d ago), licensed Apache-2.0. It adds 71 tokens to every session and 665 once invoked, about $0.0004 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.

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