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 skills add sethdford/claude-skills --skill network-topologygit clone --depth 1 https://github.com/sethdford/claude-skillsWrote 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/sethdford/claude-skills/network-topology)<a href="https://agentmods.dev/skills/sethdford/claude-skills/network-topology"><img src="https://agentmods.dev/badge/skills/sethdford/claude-skills/network-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.
<a href="https://agentmods.dev/skills/sethdford/claude-skills/network-topology"><img src="https://agentmods.dev/badge/skills/sethdford/claude-skills/network-topology.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00042 | $0.00688 |
| Opus 5 | $0.00021 | $0.00344 |
| Sonnet 5 | $0.00008 | $0.00138 |
| Haiku 4.5 | $0.00004 | $0.00069 |
Grade A, and why
network-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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Network Topology
Design secure, scalable network architecture with proper segmentation, load balancing, and failover.
Context
You are designing network infrastructure. Plan VPCs, subnets, security groups, load balancers, DNS, DDoS protection. Read application requirements, compliance needs, and expected traffic patterns.
Domain Context
Based on network architecture best practices (AWS VPC, GCP VPC):
- VPC: Virtual private cloud; isolated network environment. Multiple subnets for segmentation.
- Subnets: Public (NAT to internet) and private (no direct internet). Separate database tier from web tier.
- Security Groups: Stateful firewall rules. Default-deny, whitelist only needed ports.
- Load Balancing: ALB for HTTP/HTTPS, NLB for TCP/UDP. Distribute traffic across instances.
- DNS: Route 53 for DNS with health checks and failover routing
Instructions
-
Design VPC: CIDR block (10.0.0.0/16 typical). Public subnets in AZ-1 and AZ-2 for web tier. Private subnets for database tier. NAT Gateway for outbound access from private.
-
Segment with Security Groups: Web tier: allow 80/443. App tier: allow traffic from web only. Database tier: allow traffic from app tier only. Principle of least privilege.
-
Plan Load Balancing: Application Load Balancer (ALB) for web traffic; routes by hostname/path. Network Load Balancer (NLB) for high performance, millions of RPS.
-
Set Up DNS: Route 53 routes users to nearest region or healthy endpoint. Health checks detect failures; failover to standby. Support multiple A records for multi-region.
-
Implement DDoS Protection: CloudFlare or Shield Standard for volumetric attacks. WAF for application-layer attacks (SQL injection, XSS). Rate limiting for API abuse.
Anti-Patterns
- Single Subnet for Everything: All servers in one subnet. Result: hard to enforce policies, lateral movement risk. Guard: Segment by tier; use security groups for access control.
- Overly Permissive Security Groups: Allow 0.0.0.0/0 (anywhere) on all ports. Result: security risk. Guard: Default-deny; whitelist specific ports/IPs.
- No Health Checks: Load balancer routes to dead instance. Result: user errors. Guard: Health checks detect failures; remove from load balancer.
- Ignoring DDoS: Assume no one will attack. Result: downtime during attack. Guard: DDoS protection layers (WAF, rate limiting, CDN); plan capacity for spikes.
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.
- 11d ago First seen · 48 lines · 42 tokens per session scan A 728f705090f0
network-topology is a skill published in the GitHub repository sethdford/claude-skills (40 stars, last pushed 6mo ago), licensed MIT. It adds 42 tokens to every session and 688 once invoked, about $0.0002 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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