A collection of checks for diagnosing network and internet connection problems. It examines whether hosts can be reached, names resolve to addresses, ports accept connections, web requests respond, and SSL/TLS certificates are valid.

Test reachability, trace routes, look up DNS, inspect ports and HTTP responses, check certificates, measure connection quality, and troubleshoot network latency.

It helps identify where a connection fails instead of guessing whether the problem is DNS, routing, a port, HTTP, encryption, or delay.

network — Skill by bug-ops

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.

agentmods

npx agentmods add skills/bug-ops/zeph/network

Any agent

npx skills add bug-ops/zeph --skill network

Clone the repo

git clone --depth 1 https://github.com/bug-ops/zeph

Made for: Claude Code, Codex.

Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,240 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00083	$0.01240
Opus 5	$0.00042	$0.00620
Sonnet 5	$0.00017	$0.00248
Haiku 4.5	$0.00008	$0.00124

Measured 2d ago against content hash fc3b8629989a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

network scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl, and related tools.

.zeph/skills/network/SKILL.md · 137 lines

How it starts

The opening of the file, as written. The whole thing — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Network Diagnostics

Before running commands, detect the OS and load the matching reference for platform-specific syntax:

Linux — references/linux.md (ss, ip, iptables/nftables, iproute2)
macOS — references/macos.md (lsof, ifconfig, pfctl, networkQuality)
Windows — references/windows.md (PowerShell: Test-NetConnection, Get-NetTCPConnection)

OS detection:

uname -s 2>/dev/null || echo Windows

Quick Reference

Task	Command
Check host reachability	`ping -c 4 host`
Trace route to host	`traceroute host`
DNS lookup	`dig +short host`
Reverse DNS	`dig -x IP`
Check specific port	`nc -zv host port`
HTTP status	`curl -sI -o /dev/null -w "%{http_code}" URL`
SSL certificate	`openssl s_client -connect host:443 </dev/null`

Diagnostic Workflow

Is a service accessible?

DNS resolves — dig +short host
Host reachable — ping -c 2 host
Port open — nc -zv -w 3 host 443
HTTP responds — curl -sI -o /dev/null -w "%{http_code}" https://host
SSL valid — openssl s_client -connect host:443 </dev/null 2>/dev/null | openssl x509 -noout -checkend 0

Diagnose slow connections

DNS time — dig +stats host | grep "Query time"
Latency — ping -c 10 host
Route bottleneck — mtr -r -c 10 host (or traceroute host)
HTTP timing — use curl timing breakdown (see below)

HTTP Debugging (curl, cross-platform)

# Response headers
curl -sI https://host

# Status code only
curl -s -o /dev/null -w "%{http_code}" https://host

# Full verbose debug
curl -v https://host 2>&1

# Follow redirects
curl -sIL https://host

# Timing breakdown
curl -s -o /dev/null -w "\
  DNS:     %{time_namelookup}s\n\
  Connect: %{time_connect}s\n\
  TLS:     %{time_appconnect}s\n\
  TTFB:    %{time_starttransfer}s\n\
  Total:   %{time_total}s\n\
  Status:  %{http_code}\n\
  Size:    %{size_download} bytes\n" https://host

# Resolve to specific IP (bypass DNS)
curl --resolve host:443:93.184.216.34 https://host

# Test specific Host header
curl -s -H "Host: host" http://10.0.0.1/

Read the full file on GitHub · 137 lines

Files

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.

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.

2d ago First seen · 137 lines · 83 tokens per session scan A fc3b8629989a

Subscribe to this mod's changes

network is a skill published in the GitHub repository bug-ops/zeph (57 stars, last pushed 7d ago), licensed MIT. It adds 83 tokens to every session and 1,240 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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