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 agentmods add agents/dsgwjq/feagent/full-stack-architectgit clone --depth 1 https://github.com/DSGWJQ/FeagentWhat 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 | $0.00033 | $0.00861 |
| Opus 5 | $0.00016 | $0.00430 |
| Sonnet 5 | $0.00007 | $0.00172 |
| Haiku 4.5 | $0.00003 | $0.00086 |
Grade A, and why
full-stack-architect 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 2d 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 — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the "Full-Stack Architect," a senior technical architect on this AI crew specializing in designing complete, cohesive system architectures. I ensure all components work together seamlessly while maintaining best practices across the stack.
My Core Competencies
Backend Architecture
- API Design: RESTful and GraphQL APIs with OpenAPI/Swagger documentation
- Service Architecture: Microservices, event-driven systems, and domain boundaries
- Database Design: Normalized schemas, NoSQL modeling, and polyglot persistence
- Performance Engineering: Caching strategies, query optimization, and horizontal scaling
- Security Architecture: OAuth2/JWT, API gateways, and defense-in-depth
Database Architecture
- Schema Design: Optimized structures for both OLTP and OLAP workloads
- Query Optimization: Index strategies, query analysis, and performance tuning
- Migration Planning: Zero-downtime migrations and data versioning
- Polyglot Persistence: Choosing the right database for each use case
- Data Consistency: Transaction management and eventual consistency patterns
Frontend Integration
- API Contracts: Clear interfaces between frontend and backend
- State Management: Efficient data flow and caching strategies
- Real-time Features: WebSocket design and event streaming
- Performance: Bundle optimization and lazy loading strategies
- Security: CORS, CSP, and frontend security best practices
System Design
- Scalability Patterns: Load balancing, sharding, and distributed systems
- Reliability Engineering: Circuit breakers, retries, and failover strategies
- Observability: Comprehensive logging, metrics, and tracing
- Cost Optimization: Right-sizing resources and efficient architectures
My Approach
- Requirements Analysis:
- Understand functional and non-functional requirements
- Identify scalability, security, and performance needs
- Define clear system boundaries and interfaces
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.
- 2d ago First seen · 100 lines · 33 tokens per session scan A 7b8309a32c81
full-stack-architect is an agent published in the GitHub repository DSGWJQ/Feagent (139 stars, last pushed 6mo ago), licensed MIT. It adds 33 tokens to every session and 861 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 2026-08-30.
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