nexus-configuration

nexus-configuration is a skill for Claude Code, Codex from nexus-research-lab/nexus. It costs 58 tokens per session (1,080 once invoked), scanned A, original, Apache-2.0.

A skill for reading, planning, approving, and checking configuration in Nexus, the current private conversation or room. It covers settings such as agents, rooms, providers, channels, connectors, skills, models, tools, and MCP connections.

In plain words
What is it for?
Use it to inspect configuration or make an authorized change through the required inspect, plan, apply, and verify process.
Why use it?
It helps ensure configuration changes are made only within the caller's permitted scope and are checked after applying.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions AGENTS.md.

Good fit Use it to inspect configuration or make an authorized change through the required inspect, plan, apply, and verify process.

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Install with agentmods
npx agentmods add skills/nexus-research-lab/nexus/nexus-configuration
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 nexus-research-lab/nexus --skill nexus-configuration
Clone the repo
git clone --depth 1 https://github.com/nexus-research-lab/nexus

Made for: Claude Code, Codex.

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 nexus-configuration

README.md
[![agentmods](https://agentmods.dev/badge/skills/nexus-research-lab/nexus/nexus-configuration/github.svg)](https://agentmods.dev/skills/nexus-research-lab/nexus/nexus-configuration)
Your own site
<a href="https://agentmods.dev/skills/nexus-research-lab/nexus/nexus-configuration"><img src="https://agentmods.dev/badge/skills/nexus-research-lab/nexus/nexus-configuration/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.

agentmods 80×15 button for nexus-configuration

Your own site · 80×15
<a href="https://agentmods.dev/skills/nexus-research-lab/nexus/nexus-configuration"><img src="https://agentmods.dev/badge/skills/nexus-research-lab/nexus/nexus-configuration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,080 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00058 $0.01080
Opus 5 $0.00029 $0.00540
Sonnet 5 $0.00012 $0.00216
Haiku 4.5 $0.00006 $0.00108

Measured 2d ago against content hash 56e709f66437, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

nexus-configuration 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 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.

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.

skills/nexus-configuration/SKILL.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Nexus 配置

配置命令使用宿主注入的 NEXUSCFG_COMMAND_PATH;示例中的 nexuscfg 只代表该入口。宿主绑定当前 Agent、DM/Room round 与 owner scope,服务端返回真实 owner_main|agent_self|room_host|room_member authority。不要声明、切换或覆盖 identity/scope,也不要使用 owner 控制面、数据库或配置文件替代本能力。

固定生命周期

所有 mutation 固定走 inspect → plan → apply → verify

  1. 只 inspect 相关 domain;排障时加 --verify

    "$NEXUSCFG_COMMAND_PATH" --json inspect --domain agents --verify
    

    PowerShell 使用 & "${env:NEXUSCFG_COMMAND_PATH}" ...,不要混用 shell 变量语法。

  2. 以顶层 inspection 中的 authorityaccess.allowed_operationsdefinition.operationsrevision 与 checks 为准。不要根据 Skill 猜 operation、target 或 input;需要角色与 domain 分流时读取 references/roles-and-domains.md

  3. mutation 先用同一 domain/operation/target/input 执行 plan。输入必须是一个不含秘密的 JSON object:

    "$NEXUSCFG_COMMAND_PATH" --json plan --domain agents --operation update_self_profile --input '{"name":"新名称"}'
    
  4. 核对 plan 的 normalized change、summary、risk、runtime effect、current_revisionplan_digest 与 confirmation/secret slots。requires_confirmation=true 时等待用户针对该 plan 明确同意;只有随后 apply 才加 --confirm

  5. apply 保持同一 change,携带 plan revision 与稳定 request ID;revision 冲突时回到 inspect/plan,不覆盖新状态:

    "$NEXUSCFG_COMMAND_PATH" --json apply --domain agents --operation update_self_profile --input '{"name":"新名称"}' --expected-revision '<revision>' --request-id 'config-agent-profile-UNIQUE'
    
  6. 读取顶层 result 的写后 checks;不确定时重新 inspect --verify 或用 history --domain '<domain>' 核对。数据库已写入不等于 runtime 已生效,以返回的 runtime effect 和验证结果为准。

秘密与权限

  • 不向用户索取或在聊天、命令参数、文件、日志中写入 token、密码、私有 header、授权码或密钥。Agent 永不使用 --secrets-stdinmembers.create 使用 {"$secret":"member-password"} 占位,apply 由宿主确认卡片收集密码;其他域出现 secret slot 时,引导用户在 Settings 或人工终端完成。
  • Connector OAuth/device 与 Channel 扫码、验证码继续使用对应专用授权流程,不把凭据塞进通用 config input。
  • permission denied 表示当前 Agent/DM/Room 没有该 operation。报告真实边界,不换 target、不伪造身份,也不传隐藏的 --scope-user-id / --global-scope
  • host 只读;部署环境、启动参数和桌面状态根通过部署或原生桌面控制面修改。

Read the full file on GitHub · 57 lines

Files

What ships with it

2 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.

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. 2d ago Changed · +4 lines 56e709f66437
  2. 3d ago Changed · +4 lines · +5 tokens per session bea4feefb69e
  3. 12d ago First seen · 49 lines · 53 tokens per session scan A 80c0447222ff

Subscribe to this mod's changes

nexus-configuration is a skill published in the GitHub repository nexus-research-lab/nexus (145 stars, last pushed yesterday), licensed Apache-2.0. It adds 58 tokens to every session and 1,080 once invoked, about $0.0003 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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