pyats-topology

pyats-topology is a skill for Claude Code from automateyournetwork/netclaw. It costs 56 tokens per session (2,176 once invoked), scanned A, original, Apache-2.0.

A network-topology discovery skill that finds device neighbors, interfaces, links, routing peers, and address mappings to build a map of the network.

In plain words
What is it for?
Use it to discover CDP and LLDP neighbors, map local and remote interfaces, inspect ARP tables, identify routing peers, and document network links.
Why use it?
It shows what is connected to what when diagrams are missing, outdated, or needed for incident and change planning.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: built for openclaw.

Good fit Use it to discover CDP and LLDP neighbors, map local and remote interfaces, inspect ARP tables, identify routing peers, and document network links.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/automateyournetwork/netclaw/pyats-topology
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 automateyournetwork/netclaw --skill pyats-topology
Clone the repo
git clone --depth 1 https://github.com/automateyournetwork/netclaw

Made for: Claude Code.

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 pyats-topology

README.md
[![agentmods](https://agentmods.dev/badge/skills/automateyournetwork/netclaw/pyats-topology/github.svg)](https://agentmods.dev/skills/automateyournetwork/netclaw/pyats-topology)
Your own site
<a href="https://agentmods.dev/skills/automateyournetwork/netclaw/pyats-topology"><img src="https://agentmods.dev/badge/skills/automateyournetwork/netclaw/pyats-topology/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 pyats-topology

Your own site · 80×15
<a href="https://agentmods.dev/skills/automateyournetwork/netclaw/pyats-topology"><img src="https://agentmods.dev/badge/skills/automateyournetwork/netclaw/pyats-topology.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,176 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 $0.00056 $0.02176
Opus 5 $0.00028 $0.01088
Sonnet 5 $0.00011 $0.00435
Haiku 4.5 $0.00006 $0.00218

Measured 9d ago against content hash de3c8444c5e8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

pyats-topology 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 9d 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.

workspace/skills/pyats-topology/SKILL.md · 203 lines

How it starts

The opening of the file, as written. The whole thing — 203 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Topology Discovery

When to Use

  • Building network diagrams from scratch (no documentation exists)
  • Validating existing documentation matches reality
  • Pre-change topology baseline
  • Incident response — understanding blast radius
  • New device onboarding — mapping where it connects

Discovery Procedure

Step 1: CDP Neighbors (Cisco-to-Cisco)

PYATS_TESTBED_PATH=$PYATS_TESTBED_PATH python3 $MCP_CALL "${PYATS_PYTHON:-python3} -u $PYATS_MCP_SCRIPT" pyats_run_show_command '{"device_name":"R1","command":"show cdp neighbors detail"}'

Extract per neighbor:

  • Device ID (hostname)
  • Platform and model
  • IP address (management address)
  • Local interface → Remote interface (link mapping)
  • Software version
  • Native VLAN (on switch links)
  • Duplex

Build adjacency table:

Local Device | Local Interface | Remote Device | Remote Interface | Remote Platform
R1           | Gi0/0/0         | SW1           | Gi1/0/1          | WS-C3850-24T
R1           | Gi0/0/1         | R2            | Gi0/0/0          | ISR4431

Step 2: LLDP Neighbors (Multi-Vendor)

PYATS_TESTBED_PATH=$PYATS_TESTBED_PATH python3 $MCP_CALL "${PYATS_PYTHON:-python3} -u $PYATS_MCP_SCRIPT" pyats_run_show_command '{"device_name":"R1","command":"show lldp neighbors detail"}'

LLDP is IEEE 802.1AB — works with non-Cisco devices (Arista, Juniper, Linux hosts, IP phones, APs). Same adjacency table format as CDP but may include additional TLVs.

Step 3: ARP Table (L3 Neighbor Discovery)

PYATS_TESTBED_PATH=$PYATS_TESTBED_PATH python3 $MCP_CALL "${PYATS_PYTHON:-python3} -u $PYATS_MCP_SCRIPT" pyats_run_show_command '{"device_name":"R1","command":"show arp"}'

Analysis:

  • Map IP addresses to MAC addresses on each interface
  • Identify directly connected hosts (servers, endpoints, other routers)
  • Look for multiple MAC addresses on the same interface (switch segment)
  • Incomplete entries indicate devices that are configured but unreachable

Step 4: Routing Protocol Peers

Read the full file on GitHub · 203 lines

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. 9d ago First seen · 203 lines · 56 tokens per session scan A de3c8444c5e8

Subscribe to this mod's changes

pyats-topology is a skill published in the GitHub repository automateyournetwork/netclaw (657 stars, last pushed 6d ago), licensed Apache-2.0. It adds 56 tokens to every session and 2,176 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 2026-09-03.

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