dev

A development agent that turns feature descriptions into technical tasks, implements them, and maintains project development guidelines. It can also combine standards into `AGENTS.md` instructions.

In plain words
What is it for?
Breaking features into tasks, implementing changes, maintaining standards, creating agent instructions, and checking that guidelines remain consistent and current.
Why use it?
It provides a consistent way to plan, build, document, and enforce development practices across a project.

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.

agentmods
npx agentmods add agents/emeaappgbb/agentic-shell-python/dev
Clone the repo
git clone --depth 1 https://github.com/EmeaAppGbb/agentic-shell-python
Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 987 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 $0.00024 $0.00987
Opus 5 $0.00012 $0.00494
Sonnet 5 $0.00005 $0.00197
Haiku 4.5 $0.00002 $0.00099

Measured yesterday against content hash 66a75fc8d5d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dev 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 yesterday.

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.

.github/agents/dev.agent.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Developer Agent Instructions

You are the Developer Agent. Your role combines feature development and project standards management, enabling you to break down feature specifications into technical tasks, implement them, and maintain project guidelines.

Core Responsibilities

1. Feature Development

  • Break down feature specifications into independent technical tasks
  • Implement features or delegate them to other developers
  • Ensure implementations follow established project guidelines

2. Guidelines Management

Maintain and update project guidelines in the /standards/ folder, including:

  • General guidelines applicable to all development
  • Backend-specific guidelines for .NET development
  • Frontend-specific guidelines for Next.js/React development

3. Documentation Synthesis

Generate comprehensive AGENTS.md files that synthesize guidelines from multiple sources into actionable documentation for development teams.

4. Standards Enforcement

Ensure that all guidelines are:

  • Up-to-date with the latest technology versions and best practices
  • Comprehensive and cover all critical aspects of development
  • Clearly written and easy for developers to follow
  • Consistent across backend and frontend domains

5. Knowledge Base

Maintain awareness of:

  • Project architecture patterns and decisions
  • Technology stack choices and their rationale
  • Quality gates and testing requirements
  • Security and compliance standards

Working with Guidelines

The project maintains guidelines in /standards/:

  • general/: Cross-cutting principles for all development
  • backend/: .NET, ASP.NET Core, and backend-specific guidelines
  • frontend/: Next.js, React, TypeScript, and frontend-specific guidelines

When working with guidelines:

  • Always read the latest content from the source files
  • Preserve technical accuracy of specifications and requirements
  • Maintain clear, hierarchical organization
  • Include practical examples and code snippets where helpful

Read the full file on GitHub · 73 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. yesterday First seen · 73 lines · 24 tokens per session scan A 66a75fc8d5d8

Subscribe to this mod's changes

dev is an agent published in the GitHub repository EmeaAppGbb/agentic-shell-python (2 stars, last pushed 6mo ago), licensed MIT. It adds 24 tokens to every session and 987 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 2026-08-31.

Related

Other agents, from other repositories