platform-engineering-agent-skills: Instructions file for Codex

AGENTS.md

platform-engineering-agent-skills AGENTS.md is an instructions file for Codex, OpenCode from vaquarkhan/platform-engineering-agent-skills. It costs 679 tokens per session, scanned A, original, MIT.

An entry guide for platform-engineering agent skills, covering infrastructure platforms, deployment automation, access controls, and reliability practices. It defines commands for specifying, planning, building, validating, reviewing, and shipping work.

In plain words
What is it for?
Use it for infrastructure-as-code, GitOps deployment, internal developer platforms, policy checks, observability, security controls, and release operations.
Why use it?
It gives agents a consistent route through complex platform work and identifies which specialized workflow to load for a request.

Instructions file for CodexOpenCode

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

This is vaquarkhan/platform-engineering-agent-skills's own configuration. It tells Codex and OpenCode how to work on platform-engineering-agent-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 platform-engineering-agent-skills configures →

Reuse

Borrowing it

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

README.md
[![agentmods](https://agentmods.dev/badge/instructions/vaquarkhan/platform-engineering-agent-skills/agents-md.svg)](https://agentmods.dev/instructions/vaquarkhan/platform-engineering-agent-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/vaquarkhan/platform-engineering-agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/vaquarkhan/platform-engineering-agent-skills/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 679 This file is loaded in full into every session.
When invoked 679 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 $0.00679 $0.00679
Opus 5 $0.00340 $0.00340
Sonnet 5 $0.00136 $0.00136
Haiku 4.5 $0.00068 $0.00068

Measured 6d ago against content hash eedb318852fb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

platform-engineering-agent-skills 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 6d 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 · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Platform Engineering Agent Entry Point

Use this file as the generic entry point for agents that support AGENTS.md-style repository instructions.

Start Here

  1. Load skills/using-platform-engineering-agent-skills/SKILL.md
  2. Load the platform preset from presets/ that matches the environment
  3. Load only the workflow skills needed for the current task
  4. Pull in references, templates, and examples only when they improve decisions or proof

Lifecycle Commands

  • /spec → define platform contract, SLOs, RBAC boundaries, compliance tier
  • /plan → break IDP, GitOps, AI safety, or observability changes into atomic tasks
  • /build → implement IaC, templates, pipelines, or guardrails incrementally
  • /validate → prove policy-as-code, red-team gates, SLO analysis, and test coverage
  • /review → review reliability, cost, security, multi-tenant isolation, operability
  • /ship → GitOps promote, observe, rollback-safe release

Default Routing

  • unclear request → classify via using-platform-engineering-agent-skills
  • Backstage, Scaffolder, golden paths → idp-gitops-and-golden-paths
  • ArgoCD, Flux, Terraform, Pulumi → idp-gitops-and-golden-paths
  • OWASP ASI, NIST AI RMF, EU AI Act, red-teaming → ai-safety-red-teaming-and-compliance
  • lakeFS, RAG, data pipelines → dataops-and-rag-architectures
  • OpenTelemetry, Keptn, OpenCost, FinOps → observability-and-finops

Runnable Platform Code

Module Path
Kubernetes manifests k8s/ (gitops, policy, observability, finops)
Manifest validation k8s/validate_k8s.py
Pulumi tenant module examples/pulumi-tenant-module/

Guardrails

  • everything as code — no manual deployment scripts
  • Git is the single source of truth for Kubernetes and infrastructure state
  • defense-in-depth for AI agents: least privilege, sandboxes, human oversight for high-stakes tools
  • multi-tenant security with RBAC/ABAC isolation on all infrastructure outputs
  • prefer a small set of active skills over loading the whole repository
  • run hooks from hooks/ before risky operations when possible

Read the full file on GitHub · 62 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. 6d ago First seen · 62 lines · 679 tokens per session scan A eedb318852fb

Subscribe to this mod's changes

platform-engineering-agent-skills AGENTS.md is an instructions file published in the GitHub repository vaquarkhan/platform-engineering-agent-skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 679 tokens to every session, about $0.0034 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.

Related

Other instructions, from other repositories

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 · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,182 tokens

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 · 6,785 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, applying the notice (cutover) and fallback chain (never fail the build).

microsoft/vscode · 5,001 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 · 4,469 tokens

spec-kit AGENTS.md

AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.

github/spec-kit · 7,104 tokens