coding-agent

coding-agent is a skill for Claude Code, Codex from ApiliumCode/mayros. It costs 108 tokens per session (2,568 once invoked), scanned B, a copy of coding-agent, MIT.

Instructions for handing coding work to Codex, Claude Code, or Pi agents through background terminal processes. It covers new features, app building, code reviews, large refactors, and tasks that require exploring files.

In plain words
What is it for?
Use it to delegate feature work, app creation, pull-request reviews, large refactors, and exploratory coding tasks, with the required terminal setup.
Why use it?
It provides a consistent way to run interactive coding agents and monitor longer jobs. It also identifies small fixes that do not need delegation.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Claude Code; reads ~/.codex paths; runs codex exec.

Good fit Use it to delegate feature work, app creation, pull-request reviews, large refactors, and exploratory coding tasks, with the required terminal setup.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/apiliumcode/mayros/coding-agent
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 ApiliumCode/mayros --skill coding-agent
Clone the repo
git clone --depth 1 https://github.com/ApiliumCode/mayros

Made for: Claude Code, Codex.

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 coding-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/apiliumcode/mayros/coding-agent/github.svg)](https://agentmods.dev/skills/apiliumcode/mayros/coding-agent)
Your own site
<a href="https://agentmods.dev/skills/apiliumcode/mayros/coding-agent"><img src="https://agentmods.dev/badge/skills/apiliumcode/mayros/coding-agent/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 coding-agent

Your own site · 80×15
<a href="https://agentmods.dev/skills/apiliumcode/mayros/coding-agent"><img src="https://agentmods.dev/badge/skills/apiliumcode/mayros/coding-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,568 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 81% copy Near-identical to another mod 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 $0.00108 $0.02568
Opus 5.5 $0.00043 $0.01027
Sonnet 5.5 $0.00022 $0.00514
Haiku 4.5 $0.00011 $0.00257

Measured 1mo ago against content hash 095980b45fbe, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

coding-agent scanned grade B with 1 finding 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 1mo 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

**Model:** `gpt-5.2-codex` is the default (set in ~/.codex/config.toml)
Origin

This is a copy

81% identical to coding-agent — 76 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/coding-agent/SKILL.md · 283 lines

How it starts

The opening of the file, as written. The whole thing — 283 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Coding Agent (bash-first)

Use bash (with optional background mode) for all coding agent work. Simple and effective.

⚠️ PTY Mode Required!

Coding agents (Codex, Claude Code, Pi) are interactive terminal applications that need a pseudo-terminal (PTY) to work correctly. Without PTY, you'll get broken output, missing colors, or the agent may hang.

Always use pty:true when running coding agents:

# ✅ Correct - with PTY
bash pty:true command:"codex exec 'Your prompt'"

# ❌ Wrong - no PTY, agent may break
bash command:"codex exec 'Your prompt'"

Bash Tool Parameters

Parameter Type Description
command string The shell command to run
pty boolean Use for coding agents! Allocates a pseudo-terminal for interactive CLIs
workdir string Working directory (agent sees only this folder's context)
background boolean Run in background, returns sessionId for monitoring
timeout number Timeout in seconds (kills process on expiry)
elevated boolean Run on host instead of sandbox (if allowed)

Process Tool Actions (for background sessions)

Action Description
list List all running/recent sessions
poll Check if session is still running
log Get session output (with optional offset/limit)
write Send raw data to stdin
submit Send data + newline (like typing and pressing Enter)
send-keys Send key tokens or hex bytes
paste Paste text (with optional bracketed mode)
kill Terminate the session

Read the full file on GitHub · 283 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. 1mo ago First seen · 283 lines · 108 tokens per session scan B 095980b45fbe

Subscribe to this mod's changes

coding-agent is a skill published in the GitHub repository ApiliumCode/mayros (13 stars, last pushed 3mo ago), licensed MIT. It adds 108 tokens to every session and 2,568 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). It is 81% identical to coding-agent, differing in 76 lines, and is treated as a copy.