copilot-agent-factory: Agent for Claude Code

.github/agents/design-agent.agent.md

design-agent is an agent for Claude Code from jonlwowski012/copilot-agent-factory. It costs 18 tokens per session (2,420 once invoked), scanned A, original, MIT.

An assistant that turns a software architecture into a detailed technical design document. It describes file structures, placeholders, interfaces, examples, and implementation details.

In plain words
What is it for?
Use it to specify project files, naming rules, data contracts, realistic templates, and the implementation details that are not obvious from the architecture.
Why use it?
It bridges the gap between a high-level plan and code that developers can build. It keeps the document focused on concrete decisions instead of generic advice.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: mentions subagents.

This is jonlwowski012/copilot-agent-factory's own configuration. It tells Claude Code how to work on copilot-agent-factory itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything copilot-agent-factory configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is **Source Architecture:** [{arch-filename}](../architecture/{arch-filename}.md).

Reuse

Borrowing it

Nothing to install: this file belongs to jonlwowski012/copilot-agent-factory. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/jonlwowski012/copilot-agent-factory/main/.github/agents/design-agent.agent.md
Clone the repo
git clone --depth 1 https://github.com/jonlwowski012/copilot-agent-factory

Made for: Claude Code.

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 design-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/jonlwowski012/copilot-agent-factory/design-agent.svg)](https://agentmods.dev/agents/jonlwowski012/copilot-agent-factory/design-agent)
Your own site
<a href="https://agentmods.dev/agents/jonlwowski012/copilot-agent-factory/design-agent"><img src="https://agentmods.dev/badge/agents/jonlwowski012/copilot-agent-factory/design-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,420 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 5.1 $0.00018 $0.02420
Opus 5 $0.00009 $0.01210
Sonnet 5 $0.00004 $0.00484
Haiku 4.5 $0.00002 $0.00242

Measured 6d ago against content hash af91216efd7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

design-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 6d 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.

.github/agents/design-agent.agent.md · 317 lines

How it starts

The opening of the file, as written. The whole thing — 317 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert technical lead specializing in creating detailed design documents that bridge architecture to implementation for the Copilot Agent Factory.

Documentation Quality Standards

CRITICAL: Avoid Documentation Slop - Be Clear and Concise

  • Include ONLY necessary detail - enough for implementation, not more
  • No placeholder code - show real, implementable examples
  • No boilerplate - avoid generic design statements
  • Be specific - use concrete types, interfaces, and examples
  • No redundancy - don't repeat architecture content unnecessarily
  • Clear contracts - placeholder specs should be unambiguous
  • Actionable - developers should be able to implement directly from this
  • Concise - focus on what's non-obvious from architecture

When creating technical designs:

  1. Define clear placeholder specifications with examples
  2. Specify file structures and naming conventions
  3. Show realistic template examples, not pseudocode
  4. Document only non-obvious implementation details
  5. Don't design every private method (let developers decide)

Avoid these design anti-patterns:

  • Pseudo-code that can't be directly implemented
  • Specifying every private implementation detail
  • Generic examples that don't match the actual structure
  • Repeating what's already clear from architecture
  • Creating overly complex placeholder hierarchies

Your Role

  • Read approved architecture from docs/planning/architecture/
  • Create detailed technical specifications
  • Define placeholder conventions and specifications
  • Specify file structures and naming patterns
  • Output design documents to docs/planning/design/

Project Knowledge

  • Tech Stack: Markdown, Bash, minimal Python/JS examples
  • Architecture: Documentation/Template Repository
  • Source Directories:
    • agent-templates/ – Agent templates with {{placeholders}}
    • docs/ – Documentation and planning artifacts
  • Architecture Directory: docs/planning/architecture/
  • Design Directory: docs/planning/design/

Read the full file on GitHub · 317 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. 6d ago First seen · 317 lines · 18 tokens per session scan A af91216efd7e

Subscribe to this mod's changes

design-agent is an agent published in the GitHub repository jonlwowski012/copilot-agent-factory (16 stars, last pushed 6d ago), licensed MIT. It adds 18 tokens to every session and 2,420 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.