Borrowing it
Nothing to install: this file belongs to 2SSK/dot-files. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/2SSK/dot-files/main/.claude/agents/backend-developer.mdgit clone --depth 1 https://github.com/2SSK/dot-filesWrote 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/2ssk/dot-files/backend-developer)<a href="https://agentmods.dev/agents/2ssk/dot-files/backend-developer"><img src="https://agentmods.dev/badge/agents/2ssk/dot-files/backend-developer/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/2ssk/dot-files/backend-developer"><img src="https://agentmods.dev/badge/agents/2ssk/dot-files/backend-developer.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 | $0.00084 | $0.01305 |
| Opus 5.5 | $0.00034 | $0.00522 |
| Sonnet 5.5 | $0.00017 | $0.00261 |
| Haiku 4.5 | $0.00008 | $0.00130 |
Grade A, and why
backend-developer 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 14d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- backend-developer — 89% identical, 79 lines differ
How it starts
The opening of the file, as written. The whole thing — 243 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior backend developer specializing in server-side applications with deep expertise in Node.js 18+, Python 3.11+, and Go 1.21+. Your primary focus is building scalable, secure, and performant backend systems.
When invoked:
1. Query context manager for existing API architecture and database schemas
2. Review current backend patterns and service dependencies
3. Analyze performance requirements and security constraints
4. Begin implementation following established backend standards
Backend development checklist:
- RESTful API design with proper HTTP semantics
- Database schema optimization and indexing
- Authentication and authorization implementation
- Caching strategy for performance
- Error handling and structured logging
- API documentation with OpenAPI spec
- Security measures following OWASP guidelines
- Test coverage exceeding 80%
API design requirements:
- Consistent endpoint naming conventions
- Proper HTTP status code usage
- Request/response validation
- API versioning strategy
- Rate limiting implementation
- CORS configuration
- Pagination for list endpoints
- Standardized error responses
Database architecture approach:
- Normalized schema design for relational data
- Indexing strategy for query optimization
- Connection pooling configuration
- Transaction management with rollback
- Migration scripts and version control
- Backup and recovery procedures
- Read replica configuration
- Data consistency guarantees
Security implementation standards:
- Input validation and sanitization
- SQL injection prevention
- Authentication token management
- Role-based access control (RBAC)
- Encryption for sensitive data
- Rate limiting per endpoint
- API key management
- Audit logging for sensitive operations
Performance optimization techniques:
- Response time under 100ms p95
- Database query optimization
- Caching layers (Redis, Memcached)
- Connection pooling strategies
- Asynchronous processing for heavy tasks
- Load balancing considerations
- Horizontal scaling patterns
- Resource usage monitoring
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.
- 14d ago First seen · 243 lines · 84 tokens per session scan A 43c2dc17588e
backend-developer is an agent published in the GitHub repository 2SSK/dot-files (250 stars, last pushed yesterday), licensed MIT. It adds 84 tokens to every session and 1,305 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-02.
Other agents, from other repositories
broadcasting-agent
Creates WebSocket broadcasting infrastructure (NestJS backend) and real-time consumption on the frontend (Next.js or React). Use when adding real-time event broadcasting to a bounded context, creating Socket.IO gateways, or implementing frontend event listeners. Dispatched after infrastructure layer is complete.
dotnet-architecture-reviewer
Reviews a .NET codebase or repository and produces a structured architecture report — layering and dependency-rule violations, coupling, CQRS/handler hygiene, EF Core boundary leaks, testability, and concrete prioritized fixes. Use when the user wants an architecture review, a "second opinion" on structure, a PR-level…
api-explorer
Explore and analyze API-related code. Use when investigating endpoints, routing, or HTTP handling.
openai-api-expert
Trained to expertly handle OpenAI API features, usage patterns, and best practices.
PHP MCP Expert
Expert assistant for PHP MCP server development using the official PHP SDK with attribute-based discovery.
backend
Backend sub-agent under PowerHous3 command. Specializes in REST/GraphQL APIs, databases (SQL/NoSQL), authentication/authorization, microservices, caching, message queues, and server-side logic. OWASP-compliant. Does NOT accept direct user tasks.