author-agent

author-agent is a skill for Claude Code, Codex from ArchAstro/archagents. It costs 70 tokens per session (1,922 once invoked), scanned A, original, MIT.

A skill for creating or editing the configuration files that define an ArchAstro agent before deployment. These files can describe agent templates, scripts, custom tools, routines, and environment setup.

In plain words
What is it for?
Use it to build an agent’s configuration, add scripts or tools, set up routines, and prepare the agent for deployment.
Why use it?
It provides a guided way to prepare an agent’s configuration and directs developers to initialise local configuration when needed.

Skill for Claude CodeCodex

Part of the archagents plugin — 8 skills, 2 commands shipped together

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.

agentmods
npx agentmods add skills/archastro/archagents/author-agent
Any agent
npx skills add ArchAstro/archagents --skill author-agent
Clone the repo
git clone --depth 1 https://github.com/ArchAstro/archagents

Made for: Claude Code, Codex.

Or install archagents, the plugin that ships this one along with the rest of its 8 skills, 2 commands.

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 author-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/archastro/archagents/author-agent.svg)](https://agentmods.dev/skills/archastro/archagents/author-agent)
Your own site
<a href="https://agentmods.dev/skills/archastro/archagents/author-agent"><img src="https://agentmods.dev/badge/skills/archastro/archagents/author-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,922 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00070 $0.01922
Opus 5 $0.00035 $0.00961
Sonnet 5 $0.00014 $0.00384
Haiku 4.5 $0.00007 $0.00192

Measured 3d ago against content hash 3a07b6a4faf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

author-agent 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 3d 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.

.claude-plugins/archagents/skills/author-agent/SKILL.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ArchAstro Agent Authoring

Create or update the config files for a config-driven ArchAstro agent before deployment.

This skill assumes the ArchAgent CLI is already installed and authenticated. Use the /archagents:install and /archagents:auth commands in this same plugin instead of trying to install or authenticate the CLI manually inside this skill.

Always Start with State

Every invocation must begin by understanding the current project state:

archagent auth status

If the user is in a repo, inspect whether a configs/ directory already exists and whether the agent already has Script or AgentTemplate files.

Routing

Local config directory not initialized

If the user doesn't have a configs/ directory set up yet, route to the manage-configs skill first. That skill owns archagent init --enable-configs, local file layout, and the sync/deploy workflow.

User wants to author or modify agent configs

  1. Start from CLI-backed templates, not memory:

    • For new config objects, use:
      archagent describe configsample <Kind>
      
    • For Script configs, always use:
      archagent describe scriptdocs
      archagent describe configsample Script
      
      The script docs are the live source of truth. Do not invent or paraphrase the language from memory.
  2. Use the standard config-driven model:

    • Script logic lives in kind: Script configs.
    • Agent behavior lives in an AgentTemplate.
    • Custom tools should use kind: custom, handler_type: script, and config_ref pointing at Script configs.
    • MCP server tools should use the builtin mcp_server tool with builtin_tool_config.mcp_server_ref or builtin_tool_config.integration_id. Do not put kind: MCPServer directly in the agent's tools: list.
    • When creating configs outside a project directory, use -f to read from a file:
      archagent create config -k AgentTemplate -f configs/agents/my-agent.yaml
      
  3. Validate early:

    archagent validate config -k <Kind> -f <path>
    

    Run validation before deploy whenever the user changes Script or template files.

Read the full file on GitHub · 193 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. 3d ago First seen · 193 lines · 70 tokens per session scan A 3a07b6a4faf2

Subscribe to this mod's changes

author-agent is a skill published in the GitHub repository ArchAstro/archagents (5 stars, last pushed 17d ago), licensed MIT. It adds 70 tokens to every session and 1,922 once invoked, about $0.0003 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.

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