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Install in OpenClaw
/install subnet-calc
Description
CIDR and subnet calculator for network engineers. Calculate network address, broadcast, host range, subnet mask, wildcard mask, and more from CIDR notation....
Usage Guidance
This appears to be a straightforward, self-contained Python subnet calculator. If you plan to run it, review the included script (scripts/subnet_calc.py) yourself (it’s short and uses only the stdlib), run it with Python 3 in a controlled environment, and avoid giving it any credentials or elevated filesystem permissions—none are required. If you need to run it as an autonomous agent skill, be comfortable with the agent being able to invoke the script (no additional privileges are requested).
Capability Analysis
Type: OpenClaw Skill
Name: subnet-calc
Version: 1.0.0
The skill is a standard CIDR and subnet calculator that uses the Python standard library's 'ipaddress' module. Analysis of scripts/subnet_calc.py and SKILL.md shows no evidence of data exfiltration, network requests, or unauthorized file access. The code follows best practices for IPv6 handling to avoid memory exhaustion and contains no suspicious execution patterns or prompt injection attempts.
Capability Assessment
Purpose & Capability
Name/description, SKILL.md examples, and the included Python script all implement a CIDR/subnet calculator (IPv4/IPv6, split, containment). There are no unrelated dependencies or requested credentials.
Instruction Scope
SKILL.md instructs running the included script with arguments; the script only parses input, computes network properties using the stdlib ipaddress module, and prints results. It does not read unrelated files, environment variables, or transmit data externally.
Install Mechanism
No install spec or external downloads. The skill is instruction-only with one included Python script that uses only the Python standard library.
Credentials
No environment variables, credentials, or config paths are requested or used; this is proportionate for a local subnet calculator.
Persistence & Privilege
always is false and the skill does not request persistent system-wide changes or modify other skills. Allowing agent invocation is the platform default and is not problematic here.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install subnet-calc - After installation, invoke the skill by name or use
/subnet-calc - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
Initial release of subnet-calc.
- Calculate network address, broadcast, first/last host, subnet mask, wildcard mask, and address counts from CIDR.
- Supports both IPv4 and IPv6.
- Check if an IP is within a given network.
- Split a network into smaller subnets by prefix length.
- Outputs in plain text or JSON formats.
- Includes detection for private, loopback, multicast, and link-local ranges.
Metadata
Frequently Asked Questions
What is Subnet Calc?
CIDR and subnet calculator for network engineers. Calculate network address, broadcast, host range, subnet mask, wildcard mask, and more from CIDR notation.... It is an AI Agent Skill for Claude Code / OpenClaw, with 156 downloads so far.
How do I install Subnet Calc?
Run "/install subnet-calc" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Subnet Calc free?
Yes, Subnet Calc is completely free, licensed under MIT-0. You can download, install and use it at no cost.
Which platforms does Subnet Calc support?
Subnet Calc is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Subnet Calc?
It is built and maintained by John Wang (@johnnywang2001); the current version is v1.0.0.
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