# Let AI Explain traceroute with the Laws of Physics > Source: > Published: 2026-08-15 15:34:09+00:00 I built and open-sourced **PacketVoyage**—an Agent Skill & MCP server that turns boring `traceroute` outputs into fascinating stories about physics, geography, and undersea cables. Model Context Protocol (MCP) Server & Agent Skill for educational network traceroute analysis, fiber-optic physics verification, and packet voyage storytelling.Zero external commercial APIs, zero bundled copyright data — pure physical laws and detective insight. PacketVoyage is built around two complementary layers designed specifically for AI-native workflows: ``` ┌────────────────────────────────────────────────────────┐ │ AI Agent (LLM) │ └──────────────┬──────────────────────────┬──────────────┘ │ │ ▼ ▼ ┌──────────────────────────────┐ ┌──────────────────────────────┐ │ 🧠 Agent Skill │ │ 🛠️ MCP Server │ │ (Knowledge / Playbook) │ │ (Capabilities / Execution)│ ├──────────────────────────────┤ ├──────────────────────────────┤ │ • Speed of Light in Fiber │ │ • analyze_voyage_text │ │ (~0.67c, ~10ms / 1,000km) │ │ • voyage_investigate │ │ • Control vs Data Plane math │ │ • run_protocol_experiment │ │ • Disproving GeoIP illusions │ │ • research_host │ │ • Decision Flow & Heuristics │ │ • list_known_iata_airports │ └──────────────────────────────┘ └──────────────────────────────┘ ``` Ever wondered what’s actually happening behind a trace like this? ``` 1 gateway (192.168.1.1) 0.8 ms 2 * * * 3 ae-1.tokyo-hnd.bb.net (203.0.113.1) 2.1 ms 4 xe-0-0.sjc-core.bb.net (198.51.100.25) 88.5 ms 5 one.one.one.one (1.1.1.1) 88.7 ms ``` Behind these lines lies real-world physics: • The * * * at Hop 2 isn't packet loss: Normal traffic runs at line rate in hardware ASICs (Data Plane), while diagnostic ICMP responses are rate limited by router CPUs (Control Plane). • The +86ms jump: Light travels in silica glass fiber at ~200,000 km/s (~10 ms RTT per 1,000 km). Tokyo to Silicon Valley is ~8,300 km, so ~83 ms is the theoretical speed-of-light limit across the Pacific ocean floor. • Hidden IATA codes: Hostnames like tokyo-hnd (Haneda) and sjc-core (San Jose) reveal the subsea cable route (e.g., JUNO / PC-1). For students and general engineers, understanding what happens inside traceroute can be difficult. Let’s have AI explain it instead. ``` ### 🚢 Example AI Output Feed that trace to Claude or any MCP-enabled AI agent by packetvoyage skill │ 📍 Route: Tokyo (HND) 🌊 [JUNO Submarine Cable] ➔ San Jose (SJC) (~8,335 km) │ 🌊 Physics Check: Latency spiked from 2.1 ms ➔ 88.5 ms (+86.4 ms), perfectly matching the speed of light in transpacific optical fiber. Hop 2 │ asterisks are standard CPU control-plane rate limiting. ────── ``` Add it to Claude Code with one command: ``` claude mcp add packetvoyage -- uvx --from git+https://github.com/europeanplaice/packetvoyage.git packetvoyage ``` For Claude Desktop / Cursor / Antigravity, add this to your MCP config: ``` { "mcpServers": { "packetvoyage": { "command": "uvx", "args": ["--from", "git+https://github.com/europeanplaice/packetvoyage.git", "packetvoyage"] } } } ``` Check out the repo and give your next traceroute a physical voyage! 👉 GitHub: europeanplaice/packetvoyage [https://github.com/europeanplaice/packetvoyage](https://github.com/europeanplaice/packetvoyage)