packet-tracer-mcp: Instructions file for Codex

AGENTS.md

packet-tracer-mcp AGENTS.md is an instructions file for Codex, OpenCode from Jcorderop02/packet-tracer-mcp. It costs 3,421 tokens per session, scanned A, original, MIT.

Project instructions for using a bridge to build network layouts in Cisco Packet Tracer, a tool for designing and testing computer networks.

In plain words
What is it for?
Use them to inspect the existing layout, interpret a supplied diagram, and connect routers, switches, computers, and servers correctly.
Why use it?
They help avoid incorrect devices, connections, and network segments before a topology is created.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is Jcorderop02/packet-tracer-mcp's own configuration. It tells Codex and OpenCode how to work on packet-tracer-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything packet-tracer-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Jcorderop02/packet-tracer-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Jcorderop02/packet-tracer-mcp/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Jcorderop02/packet-tracer-mcp

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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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.

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Per session 3,421 This file is loaded in full into every session.
When invoked 3,421 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.03421 $0.03421
Opus 5 $0.01710 $0.01710
Sonnet 5 $0.00684 $0.00684
Haiku 4.5 $0.00342 $0.00342

Measured 9d ago against content hash efef5e943b13, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

packet-tracer-mcp AGENTS.md 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.

AGENTS.md · 236 lines

How it starts

The opening of the file, as written. The whole thing — 236 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — guía para LLMs que usan packet-tracer-mcp

Este archivo es para ti, el modelo, cuando un usuario te pida montar topologías en Cisco Packet Tracer 9 a través de este servidor MCP. Léelo antes de empezar a llamar tools — te ahorra retrabajos.

1. Antes de tocar nada

  1. Llama a pt_bridge_status para verificar que el bridge ve la extensión PT. Si no, pide al usuario el bootstrap.
  2. Llama a pt_query_topology para ver qué hay ya en el canvas.
  3. Si el usuario aporta un diagrama (PDF, imagen, sketch), descríbelo con tus palabras antes de crear nada. Identifica:
    • Cuántos routers, switches y endpoints.
    • Qué LANs son de usuario (con PCs/servidores).
    • Qué LANs son de tránsito entre routers (sólo switch, sin PCs).
    • Qué enlaces son LAN interna (Gigabit) y cuáles WAN exterior (Serial /30 público).
  4. Si el diagrama es ambiguo, pregunta al usuario antes de adivinar. Una topología hecha sobre la suposición equivocada cuesta más tiempo de rehacer que la pregunta.

2. Convenciones de cableado

Esta es la fuente de errores más común. Lee con atención.

Tipo de enlace Cable Interfaces
Router ↔ Switch (LAN de oficina) straight GigabitEthernet ↔ Gigabit/Fast
Switch ↔ PC / Server straight Fast/GigabitEthernet
Router ↔ Router por LAN compartida vía switch straight GigabitEthernet (ambos vía switch)
Router ↔ Router por WAN exterior pública serial Serial0/1/0 (requiere HWIC-2T)
Switch ↔ Switch (trunk) cross GigabitEthernet

Regla mnemotécnica: si en el enunciado aparecen palabras como "red pública", "ISP", "/30 público", "WAN", "punto a punto público", o en el diagrama hay líneas rojas entre routers atravesando una nube de Internet → es serial. Si es un segmento dentro de la misma oficina → GigabitEthernet.

Read the full file on GitHub · 236 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 · 236 lines · 3,421 tokens per session scan A efef5e943b13

Subscribe to this mod's changes

packet-tracer-mcp AGENTS.md is an instructions file published in the GitHub repository Jcorderop02/packet-tracer-mcp (11 stars, last pushed 1mo ago), licensed MIT. It adds 3,421 tokens to every session, about $0.0171 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 2026-08-31.

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