What is addyosmani-agent-skills AGENTS.md?

Repository instructions for AI coding agents working with a collection of engineering skills. They describe the project, its OpenCode integration, and which skill to use for different tasks.

Following repository-specific rules, mapping tasks such as debugging or code review to skills, and working with the skills directory and OpenCode.

They give an agent the context and rules needed to choose the right guidance instead of implementing a task directly when a matching skill exists.

How az9713/addyosmani-agent-skills configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to az9713/addyosmani-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/az9713/addyosmani-agent-skills/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/az9713/addyosmani-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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/az9713/addyosmani-agent-skills/agents-md.svg)](https://agentmods.dev/instructions/az9713/addyosmani-agent-skills/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/az9713/addyosmani-agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/az9713/addyosmani-agent-skills/agents-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 1,173 This file is loaded in full into every session.

When invoked 1,173 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.

Model	Per session	Once invoked
Fable 5.1	$0.01173	$0.01173
Opus 5	$0.00587	$0.00587
Sonnet 5	$0.00235	$0.00235
Haiku 4.5	$0.00117	$0.00117

Measured 8d ago against content hash 11a14e81337f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

addyosmani-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 8d 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 · 170 lines

How it starts

The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to AI coding agents (Claude Code, Cursor, Copilot, Antigravity, etc.) when working with code in this repository.

Repository Overview

A collection of skills for Claude.ai and Claude Code for senior software engineers. Skills are packaged instructions and scripts that extend Claude and your coding agents capabilities.

OpenCode Integration

OpenCode uses a skill-driven execution model powered by the skill tool and this repository's /skills directory.

Core Rules

If a task matches a skill, you MUST invoke it
Skills are located in skills/<skill-name>/SKILL.md
Never implement directly if a skill applies
Always follow the skill instructions exactly (do not partially apply them)

Intent → Skill Mapping

The agent should automatically map user intent to skills:

Feature / new functionality → spec-driven-development, then incremental-implementation, test-driven-development
Planning / breakdown → planning-and-task-breakdown
Bug / failure / unexpected behavior → debugging-and-error-recovery
Code review → code-review-and-quality
Refactoring / simplification → code-simplification
API or interface design → api-and-interface-design
UI work → frontend-ui-engineering

Lifecycle Mapping (Implicit Commands)

OpenCode does not support slash commands like /spec or /plan.

Instead, the agent must internally follow this lifecycle:

DEFINE → spec-driven-development
PLAN → planning-and-task-breakdown
BUILD → incremental-implementation + test-driven-development
VERIFY → debugging-and-error-recovery
REVIEW → code-review-and-quality
SHIP → shipping-and-launch

Execution Model

For every request:

Determine if any skill applies (even 1% chance)
Invoke the appropriate skill using the skill tool
Follow the skill workflow strictly
Only proceed to implementation after required steps (spec, plan, etc.) are complete

Anti-Rationalization

The following thoughts are incorrect and must be ignored:

Read the full file on GitHub · 170 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.

8d ago First seen · 170 lines · 1,173 tokens per session scan A 11a14e81337f

Subscribe to this mod's changes

addyosmani-agent-skills AGENTS.md is an instructions file published in the GitHub repository az9713/addyosmani-agent-skills (36 stars, last pushed 5mo ago), licensed MIT. It adds 1,173 tokens to every session, about $0.0059 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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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.

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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

addyosmani-agent-skills: Instructions file for Codex