Documentation and configuration guidance for ACOS, including how its skills, commands, agents, and hook system work. A hook is an automatic action that runs when a particular event occurs.

Learning ACOS, adding new capabilities, extending its commands or agents, and debugging its hooks.

It gives developers a reference when they need to understand or change the ACOS system.

acos-meta — Skill for Claude Code by frankxai/claude-skills-library

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 frankxai/claude-skills-library --skill acos-meta

Clone the repo

git clone --depth 1 https://github.com/frankxai/claude-skills-library

Made for: Claude Code.

Or install claude-skills-library, the plugin that ships this one along with the rest of its 114 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/frankxai/claude-skills-library/acos-meta/github.svg)](https://agentmods.dev/skills/frankxai/claude-skills-library/acos-meta)

Your own site

<a href="https://agentmods.dev/skills/frankxai/claude-skills-library/acos-meta"><img src="https://agentmods.dev/badge/skills/frankxai/claude-skills-library/acos-meta/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/frankxai/claude-skills-library/acos-meta"><img src="https://agentmods.dev/badge/skills/frankxai/claude-skills-library/acos-meta.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,142 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.

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	$0.00063	$0.02142
Opus 5.5	$0.00025	$0.00857
Sonnet 5.5	$0.00013	$0.00428
Haiku 4.5	$0.00006	$0.00214

Measured 2mo ago against content hash 48484669e161, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

acos-meta 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 2mo 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.

free-skills/acos-meta/SKILL.md · 187 lines

How it starts

The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ACOS Meta

ACOS describes itself using the same primitives it uses to build everything else. This skill is ACOS about ACOS.

System Architecture

acos-intelligence-system/
├── .claude-plugin/
│   └── plugin.json              ← Plugin manifest (v11.0.0)
├── .mcp.json                    ← MCP server registry
├── CONNECTORS.md                ← Connector category map
├── skills/                      ← Domain expertise (subdirs, progressive disclosure)
│   ├── [skill-name]/
│   │   ├── SKILL.md             ← Lean main file (<3K words)
│   │   └── references/          ← Deep content, fetched on demand
├── commands/                    ← Slash commands (one .md per command)
├── hooks/                       ← Lifecycle automation (SessionStart, Stop, etc.)
├── docs/                        ← Strategy documents
└── README.md                    ← Entry point

The 3 Design Principles (Drawn from knowledge-work-plugins)

1. Progressive Disclosure

SKILL.md contains the mental model and workflow skeleton. Details live in references/. Claude loads the lean summary and fetches references only when needed. This keeps context efficient without sacrificing depth.

2. Connector Agnosticism

Skills reference ~~categories, not vendor names. The .mcp.json maps categories to specific tools. Swap tools without touching skill content.

3. Commands as Workflows

Commands are fully-specified workflows in markdown — trigger, input gathering, decision logic, output structure, follow-up options. No code. Claude interprets and executes.

How ACOS Auto-Routing Works

The /acos command is the entry point. It routes based on keyword detection:

User request
    |
    ├── AI architecture keywords    → Technical Architect agent
    ├── Content/writing keywords    → Content Engine
    ├── Music keywords              → Music Producer
    ├── Visual/image keywords       → Visual Creation Council
    ├── Deploy/build keywords       → DevOps Pipeline
    ├── Research keywords           → Deep Research swarm
    └── Complex/multi-file          → Full swarm (5+ agents)

Read the full file on GitHub · 187 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

references/v11-architecture-decisions.md 11 KB

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.

2mo ago First seen · 187 lines · 63 tokens per session scan A 48484669e161

Subscribe to this mod's changes

acos-meta is a skill published in the GitHub repository frankxai/claude-skills-library (47 stars, last pushed yesterday), licensed MIT. It adds 63 tokens to every session and 2,142 once invoked, about $0.0003 per session on Opus 5.5. 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.

Building agents Claude Code Productivity ai-tools anthropic prompt-engineering skills

acos-meta next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
acos-metafrankxai/claude-skills-library	Skill	47	yesterday	MIT	A	63	Claude Code
token-saverchidekina/aria-superpowers	Skill	2	1mo ago	none	C	85	Claude Code, Codex
wayfindervinvcn/mattpocock-skills-zh-CN	Skill	5.6k	11d ago	MIT	A	40	Claude Code, Codex
scaffold-exercisesvinvcn/mattpocock-skills-zh-CN	Skill	5.6k	11d ago	MIT	A	46	Claude Code, Codex
domain-modelingvinvcn/mattpocock-skills-zh-CN	Skill	5.6k	11d ago	MIT	A	38	Claude Code, Codex
migrate-to-shoehornvinvcn/mattpocock-skills-zh-CN	Skill	5.6k	11d ago	MIT	A	53	Claude Code, Codex
ask-mattvinvcn/mattpocock-skills-zh-CN	Skill	5.6k	11d ago	MIT	A	28	Claude Code, Codex