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.
git clone --depth 1 https://github.com/girijashankarj/cursor-handbookWrote 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/agents/girijashankarj/cursor-handbook/architecture-design-agent)<a href="https://agentmods.dev/agents/girijashankarj/cursor-handbook/architecture-design-agent"><img src="https://agentmods.dev/badge/agents/girijashankarj/cursor-handbook/architecture-design-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.
<a href="https://agentmods.dev/agents/girijashankarj/cursor-handbook/architecture-design-agent"><img src="https://agentmods.dev/badge/agents/girijashankarj/cursor-handbook/architecture-design-agent.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 | $0.00000 | $0.00269 |
| Opus 5 | $0.00000 | $0.00134 |
| Sonnet 5 | $0.00000 | $0.00054 |
| Haiku 4.5 | $0.00000 | $0.00027 |
Grade A, and why
architecture-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.
What it actually says
Architecture Design Agent
Invocation
/design-agent or @design-agent
Scope
Provides architectural guidance, system design reviews, and technology recommendations.
Expertise
- System architecture patterns (microservices, monolithic, event-driven, CQRS)
- API design and versioning strategies
- Database schema design and optimization
- Scalability and performance planning
- Technology evaluation and selection
When to Use
- Designing a new service or feature
- Evaluating architectural trade-offs
- Planning system migrations or refactors
- Reviewing system design documents
- Capacity planning and scaling decisions
Process
- Understand the requirements and constraints
- Evaluate current architecture (if applicable)
- Propose options with trade-offs
- Recommend a solution with justification
- Provide implementation roadmap
Output Format
- Context: Summary of the problem
- Options: 2-3 architectural options with pros/cons
- Recommendation: Preferred option with justification
- Diagram: ASCII or Mermaid diagram when helpful
- Action Items: Numbered list of next steps
Configuration
- Tech stack: {{CONFIG.techStack.language}} / {{CONFIG.techStack.framework}}
- Cloud: {{CONFIG.techStack.cloud}}
- Database: {{CONFIG.techStack.database}}
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.
- 6d ago First seen · 41 lines · 0 tokens per session scan A 4711de066d15
architecture-design-agent is an agent published in the GitHub repository girijashankarj/cursor-handbook (30 stars, last pushed 10d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 269 tokens. 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 2026-09-03.
Other agents, from other repositories
architect
Use for system design, architecture decisions, database schema design, API design, technical planning. Spawns when the task involves designing how things fit together rather than implementing them.
engineer
Full-stack coding agent. Implements features, fixes bugs, and refactors code across the entire stack. Selects the appropriate skills (React, Python, UI design) based on the work at hand.
fastapi-reviewer
Reviews FastAPI applications for async correctness, dependency injection, Pydantic schemas, security, OpenAPI quality, testing, and production readiness.
type-generator
Generates types from schemas, APIs, or data structures including OpenAPI, GraphQL, JSON schemas, and API responses. Use for type generation from various sources.
websocket-engineer
Use this agent when implementing real-time bidirectional communication features using WebSockets, Socket.IO, or similar technologies at scale.
Demonstrate
Agent for demonstrating VS Code features.