recon-skills: Instructions file for Codex

AGENTS.md

recon-skills AGENTS.md is an instructions file for Codex, OpenCode from uphiago/recon-skills. It costs 900 tokens per session, scanned A, original, MIT.

Contributor instructions for a library of portable playbooks for authorized offensive-security testing. They define which security topics belong in the repository and which operational or unrelated topics do not.

In plain words
What is it for?
Use them when adding or maintaining playbooks for asset discovery, web and API testing, cloud or identity testing, attack paths, evidence handling, and reporting.
Why use it?
They keep security guidance focused, permission-based, portable, and free of target-specific secrets or deployment assumptions.

Instructions file for CodexOpenCode

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

This is uphiago/recon-skills's own configuration. It tells Codex and OpenCode how to work on recon-skills 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 recon-skills configures →

About the project

Recon Skills is a pack of security-testing skills covering reconnaissance, web applications, APIs, authentication, vulnerability validation, cloud infrastructure, and reporting. Security professionals use it for authorized assessments of systems they own or have written permission to test. The catalogue entries are individual skills from the pack.

uphiago/recon-skills · 1,308 stars · on GitHub · hiago.sh

Reuse

Borrowing it

Nothing to install: this file belongs to uphiago/recon-skills. 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/uphiago/recon-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/uphiago/recon-skills

Made for: Codex, OpenCode.

Wrote 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.

agentmods badge for recon-skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/uphiago/recon-skills/agents-md/github.svg)](https://agentmods.dev/instructions/uphiago/recon-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/uphiago/recon-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/uphiago/recon-skills/agents-md/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.

agentmods 80×15 button for recon-skills AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/uphiago/recon-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/uphiago/recon-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 900 This file is loaded in full into every session.
When invoked 900 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.00900 $0.00900
Opus 5.5 $0.00360 $0.00360
Sonnet 5.5 $0.00180 $0.00180
Haiku 4.5 $0.00090 $0.00090

Measured 1mo ago against content hash 89bbaf467ac3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

recon-skills AGENTS.md 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 1mo 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.

- Use normal command names such as `curl`, `nmap`, or `python3`.
AGENTS.md · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Library Contributor Guide

This repository contains portable offensive-security playbooks. It does not configure or document the runtime that consumes them.

These skills are for authorized security testing only. Only test targets you own or have explicit written permission to test.

Scope

Add or maintain skills for:

  • external asset discovery and OSINT;
  • web, API, cloud, identity, and infrastructure testing;
  • platform-specific vulnerability validation;
  • attack-path analysis;
  • evidence handling, triage, and reporting.

Do not add:

  • agent framework configuration;
  • model or provider selection;
  • chat, dashboard, cron, or scheduler instructions;
  • private container, host, SSH, or network topology;
  • deployment-specific workarounds;
  • target-specific evidence or credentials;
  • unrelated productivity or creative automation.

Docker, SSH, controllers, workers, and similar terms are valid when they are the subject of a security technique. They are not valid as assumptions about where this repository is running.

Repository Layout

Directory Ownership
auth/ Authentication protocols and SSO
chains/ Evidence-backed attack paths
infra/ Infrastructure exploitation and validation
meta/ Cross-skill workflows and engagement methodology
recon/ Discovery and focused enumeration
redteam/ Vulnerability-class, platform, and reporting skills

Place supporting material next to its skill:

category/skill-name/
|-- SKILL.md
|-- references/
|-- scripts/
`-- templates/

Skill Contract

Every new or substantially revised SKILL.md must follow STYLE.md and include:

  1. When to Use
  2. Prerequisites
  3. How to Run
  4. Procedure
  5. Pitfalls
  6. Verification

Frontmatter must provide a unique kebab-case name, a concise description, semantic version, license, supported platforms, category, tags, and valid related-skill names.

Commands must be runnable, bounded, and explicit about side effects. Include timeouts and conservative concurrency. Distinguish discovery from validation, and require operator confirmation before any state-changing request.

Read the full file on GitHub · 136 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. 1mo ago First seen · 136 lines · 900 tokens per session scan A 89bbaf467ac3

Subscribe to this mod's changes

recon-skills AGENTS.md is an instructions file published in the GitHub repository uphiago/recon-skills (1,308 stars, last pushed 1mo ago), licensed MIT. It adds 900 tokens to every session, about $0.0036 per session on Opus 5.5. 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.

Related

Other instructions, from other repositories

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,649 tokens

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,384 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).

microsoft/vscode · 5,262 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,680 tokens

vscode copilot-instructions.md

Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).

microsoft/vscode · 2,731 tokens

deno copilot-instructions.md

Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.

denoland/deno · 3,077 tokens