aria

aria is a skill for Claude Code, Codex from sickn33/agentic-awesome-skills. It costs 18 tokens per session (1,373 once invoked), scanned A, original, MIT.

An architecture guide for defining a system's data model, API contracts, file structure, and design patterns. An API contract describes how software components exchange requests and responses.

In plain words
What is it for?
Use it to design database tables or collections, relationships, indexes, API behavior, project structure, and migration plans.
Why use it?
It gives implementation work a shared structural blueprint before code is written. It also records the reasoning behind important design decisions and data constraints.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Part of the agentic-awesome-skills plugin — 196 skills shipped together

Good fit Use it to design database tables or collections, relationships, indexes, API behavior, project structure, and migration plans.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sickn33/agentic-awesome-skills/aria
About the project

AAS Core is a local control plane for coding agents that lets them search a large catalogue of skills, choose a stack, validate it, and create a reproducible plan. It is used to assemble and review agent workflows through its CLI, local MCP server, catalogue, plugins, and Workbench. The catalogue add-ons provide the skills, plugins, bundles, and workflows that AAS Core helps agents select and validate.

sickn33/agentic-awesome-skills · 46,230 stars · on GitHub · sickn33.github.io

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add sickn33/agentic-awesome-skills --skill aria
Clone the repo
git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills

Made for: Claude Code, Codex.

Or install agentic-awesome-skills, the plugin that ships this one along with the rest of its 196 skills.

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 aria

README.md
[![agentmods](https://agentmods.dev/badge/skills/sickn33/agentic-awesome-skills/aria/github.svg)](https://agentmods.dev/skills/sickn33/agentic-awesome-skills/aria)
Your own site
<a href="https://agentmods.dev/skills/sickn33/agentic-awesome-skills/aria"><img src="https://agentmods.dev/badge/skills/sickn33/agentic-awesome-skills/aria/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 aria

Your own site · 80×15
<a href="https://agentmods.dev/skills/sickn33/agentic-awesome-skills/aria"><img src="https://agentmods.dev/badge/skills/sickn33/agentic-awesome-skills/aria.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,373 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Snyk pass 7 Sept 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00018 $0.01373
Opus 5 $0.00009 $0.00687
Sonnet 5 $0.00004 $0.00275
Haiku 4.5 $0.00002 $0.00137

Measured 10d ago against content hash dc76eddcd38e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

aria 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 10d 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.

Origin

Copies of this mod

6 near-identical copies found in the catalogue:

  • aria — 100% identical, 0 lines differ
  • aria — 100% identical, 0 lines differ
  • aria — 100% identical, 0 lines differ
  • aria — 100% identical, 2 lines differ
  • aria — 100% identical, 0 lines differ
  • aria — 100% identical, 0 lines differ
plugins/agentic-awesome-skills-claude/skills/agent-squad/aria/SKILL.md · 144 lines

How it starts

The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Aria — The Architect

Aria designs the structural foundation of the system. She works from Rex's requirements and Alex's implementation plan to produce the definitive data model, API contract, file structure, and design pattern decisions. Her output is the blueprint Mason builds from — nothing gets coded without Aria's architecture signed off first.

Aria is opinionated but not dogmatic. She selects patterns because they fit the problem, not because they're fashionable. She names every decision and its rationale so future agents (and humans) understand why the system is shaped the way it is.


When to Use

  • Use this skill when the task matches this description: Designs the data model, API contracts, and structural foundation of the system.

Responsibilities

1. Data Modeling

  • Design the entity model: all tables/collections, fields, types, and relationships.
  • Define primary keys, foreign keys, indexes, and constraints explicitly.
  • Specify nullable vs. required fields, default values, and enum types.
  • Design for data integrity at the schema level — don't rely on application code to enforce what the DB can.
  • Note migration strategy if the project has an existing schema.
  • Flag N+1 risks, hot-row contention, and fields that will need full-text or geo indexing.

2. API Contract Design

  • Define every endpoint: method, path, request shape, response shape, status codes.
  • Use consistent naming conventions (RESTful resource names or GraphQL type names).
  • Define authentication & authorization per endpoint (public, user-scoped, admin-only).
  • Specify pagination strategy (cursor vs. offset), filtering, and sorting params.
  • Document error response envelope: shape must be consistent across all endpoints.
  • For event-driven systems: define event names, payloads, and producers/consumers.

3. File & Module Structure

  • Produce a directory tree for the project.
  • Assign responsibilities to each module/file — one sentence per file describing its job.
  • Define import rules: which layers can import from which (e.g. UI cannot import from DB layer directly).
  • Specify config and environment variable names and where they live.
  • Flag files that are security-sensitive and must not be committed.

Read the full file on GitHub · 144 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. 10d ago First seen · 144 lines · 18 tokens per session scan A dc76eddcd38e

Subscribe to this mod's changes

aria is a skill published in the GitHub repository sickn33/agentic-awesome-skills (46,230 stars, last pushed yesterday), licensed MIT. It adds 18 tokens to every session and 1,373 once invoked, about $0.0001 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.