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.
npx agentmods add skills/larsboes/axon/netmonnpx skills add larsboes/Axon --skill netmongit clone --depth 1 https://github.com/larsboes/AxonWrote 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.
[](https://agentmods.dev/skills/larsboes/axon/netmon)<a href="https://agentmods.dev/skills/larsboes/axon/netmon"><img src="https://agentmods.dev/badge/skills/larsboes/axon/netmon.svg" alt="Measured on agentmods" height="20"></a>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 5.1 | $0.00174 | $0.01541 |
| Opus 5 | $0.00087 | $0.00771 |
| Sonnet 5 | $0.00035 | $0.00308 |
| Haiku 4.5 | $0.00017 | $0.00154 |
Grade B, and why
netmon scanned grade B 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 5d 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
Pi.** Install it first (`sudo apt install nmap`, or `brew install nmap` on macOS) — the tool How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
netmon
Network visibility from wherever you run it — especially after isolating IoT onto its own VLAN.
scan/ports/baseline/diff need only nmap + the Python stdlib and no credentials.
traffic reads the Fritz!Box over TR-064 (credentials from Bitwarden at runtime).
dns/egress read a resolver's query log over SSH. Nothing is pinned to one house.
Configuration
Non-secret config lives in the committed axon-overlay overlay (config/home-assistant.vars,
resolved via $AXON_HOME_ROOT, falling back to the active deployment overlay). The one secret comes from
Bitwarden at runtime.
| What | Source | Default |
|---|---|---|
| Subnet to scan | --subnet / $NETMON_SUBNET / NETMON_SUBNET in home-assistant.vars |
auto-derived from the primary interface as a /24 |
| SSH target (dns/egress) | $NETMON_SSH / NETMON_SSH in home-assistant.vars |
none — required for dns/egress |
| Resolver container | $NETMON_DNS_CONTAINER |
dnsmasq |
| Fritz!Box host + user (traffic) | FRITZBOX_HOST / FRITZBOX_USERNAME in home-assistant.vars |
none — required for traffic |
| Fritz!Box password (traffic) | Bitwarden item $NETMON_BW_ITEM, secret field FRITZBOX_PASSWORD |
home-assistant/netmon |
For subnet and SSH the env var wins if set, else the overlay config, else (subnet only)
auto-derivation; the --subnet flag overrides everything. The bw item holds only the secret
FRITZBOX_PASSWORD — the non-secret FRITZBOX_HOST/FRITZBOX_USERNAME live in home-assistant.vars
(same split and shape as the fritz skill). Provision the password via Axon setup-secret.sh.
Run
# Inventory + drift (no credentials)
scripts/netmon scan # live hosts + MAC + vendor
scripts/netmon ports 10.0.0.45 # open ports on one host (default --top-ports 100)
scripts/netmon baseline # save the known-good snapshot
scripts/netmon diff # new / missing hosts since baseline
# WAN throughput (needs bw + fritzconnection)
export BW_SESSION=$(bw unlock --raw)
scripts/netmon traffic
# DNS egress (needs $NETMON_SSH)
export NETMON_SSH=user@resolver-host
scripts/netmon dns # top domains, all clients
scripts/netmon egress 10.0.0.128 # one device's external domains
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.
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.
- 5d ago First seen · 100 lines · 174 tokens per session scan B 116858019add
netmon is a skill published in the GitHub repository larsboes/Axon (1 stars, last pushed 3d ago), licensed MIT. It adds 174 tokens to every session and 1,541 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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