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.
npx skills add JakubMikolajek/codex-skills-collection --skill architecture-designgit clone --depth 1 https://github.com/JakubMikolajek/codex-skills-collectionWrote 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.
[](https://agentmods.dev/skills/jakubmikolajek/codex-skills-collection/architecture-design)<a href="https://agentmods.dev/skills/jakubmikolajek/codex-skills-collection/architecture-design"><img src="https://agentmods.dev/badge/skills/jakubmikolajek/codex-skills-collection/architecture-design/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.
<a href="https://agentmods.dev/skills/jakubmikolajek/codex-skills-collection/architecture-design"><img src="https://agentmods.dev/badge/skills/jakubmikolajek/codex-skills-collection/architecture-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00030 | $0.00716 |
| Opus 5 | $0.00015 | $0.00358 |
| Sonnet 5 | $0.00006 | $0.00143 |
| Haiku 4.5 | $0.00003 | $0.00072 |
Grade A, and why
architecture-design 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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Architecture Design
This skill helps you design the architecture that follows best practices and solves the actual business goal.
Architecture Design Process
Use the checklist below and track your progress:
Analysis progress:
- [ ] Step 1: Understand the goal of the task
- [ ] Step 2: Analyse the current codebase
- [ ] Step 3: Ask questions about ambiguous parts
- [ ] Step 4: Design a solution
- [ ] Step 5: Create an implementation plan document
Step 1: Understand the goal of the task
Thoroughly process the conversation history and task *.research.md file to fully understand the business goal of the task.
Step 2: Analyse the current codebase Perform a current codebase analysis to get a full picture of a current system in a context of the task. Make sure to understand the project and domain best practices.
Step 3: Ask questions about ambiguous parts After getting a full picture of the codebase and the task, ask any remaining questions. Don't continue until you get all of the answers.
Step 4: Design a solution Based on your findings design a solution architecture.
Follow the best security and software design patterns.
Your goal is to design a solution that is not overengineered and easy to comprehend by developers, that is at the same time scalable, secure and easy to maintain.
The example patterns you should check (but you are not limited to only use those):
- Dont repeat yourself
- Keep It Simple Stupid
- Domain Driven Design
- Test Driven Design
- Modular Architecture / Hexagonal Architecture / Layered Architecture
- Queue / Messaging systems
- Single Responsibility
- CQRS
Make sure to follow the best UI/UX patterns:
- Atomic Design
- Accessibility patterns (WCAG)
Make sure to follow security best practices like OWASP TOP10
The design has to meet quality assurance criteria, meaning it has to be fully tested using combination of e2e, unit and integration tests.
Don't duplicate any work.
Make sure to use implementation-gap-analysis skill to verify what was already implemented from your plan and what should be added. Make sure to include the result in final plan.
What ships with it
2 files 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.
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.
- 11d ago First seen · 81 lines · 30 tokens per session scan A bad34cbb53bf
architecture-design is a skill published in the GitHub repository JakubMikolajek/codex-skills-collection (5 stars, last pushed 6d ago), licensed MIT. It adds 30 tokens to every session and 716 once invoked, about $0.0002 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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