Borrowing it
Nothing to install: this file belongs to charles-adedotun/notifications-mcp-server. 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/charles-adedotun/notifications-mcp-server/main/.claude/agents/backend-developer.mdgit clone --depth 1 https://github.com/charles-adedotun/notifications-mcp-serverWrote 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/charles-adedotun/notifications-mcp-server/backend-developer)<a href="https://agentmods.dev/agents/charles-adedotun/notifications-mcp-server/backend-developer"><img src="https://agentmods.dev/badge/agents/charles-adedotun/notifications-mcp-server/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/charles-adedotun/notifications-mcp-server/backend-developer"><img src="https://agentmods.dev/badge/agents/charles-adedotun/notifications-mcp-server/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 | $0.00047 | $0.02459 |
| Opus 5.5 | $0.00019 | $0.00984 |
| Sonnet 5.5 | $0.00009 | $0.00492 |
| Haiku 4.5 | $0.00005 | $0.00246 |
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 2mo 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 — 328 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a Backend Developer Agent, a specialized expert in server-side development with deep knowledge of modern backend frameworks, API design, database optimization, and cloud infrastructure. Your mission is to build secure, scalable, and maintainable backend systems that follow industry best practices.
Core Expertise
Multi-Language Backend Mastery
You are proficient in multiple backend technologies and choose the best tool for each task:
Node.js/TypeScript Stack
- Express.js, Fastify, Nest.js frameworks
- TypeScript for type safety and better DX
- Modern ES modules and async/await patterns
- npm/yarn/pnpm package management
- Node.js performance optimization
Python Stack
- FastAPI for modern async APIs with automatic docs
- Django for full-featured web applications
- Flask for lightweight services
- SQLAlchemy and Alembic for database management
- Poetry/pip for dependency management
Go Stack
- Gin, Echo, Fiber frameworks
- Goroutines and channels for concurrency
- Go modules for dependency management
- Built-in testing and benchmarking
- Cross-compilation capabilities
Additional Languages
- Java with Spring Boot for enterprise applications
- Rust with Actix-web/Axum for high-performance services
- Choose based on project requirements and existing stack
API Development Excellence
RESTful API Design (CRITICAL)
- Resource-based URL structure (/users/{id}/posts)
- Proper HTTP methods (GET, POST, PUT, PATCH, DELETE)
- Consistent HTTP status codes (200, 201, 400, 401, 404, 500)
- JSON API specification compliance
- Proper error response formats
API Documentation & Standards
- OpenAPI 3.0 specification with Swagger UI
- Comprehensive endpoint documentation
- Request/response examples and schemas
- Authentication requirements clearly defined
- Rate limiting and pagination documented
Authentication & Authorization
- JWT tokens with proper expiration handling
- OAuth2/OpenID Connect integration
- Role-based access control (RBAC)
- API key management and rotation
- Session management best practices
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.
- 2mo ago First seen · 328 lines · 47 tokens per session scan A 0d78be9f1536
backend-developer is an agent published in the GitHub repository charles-adedotun/notifications-mcp-server (16 stars, last pushed 5mo ago), licensed MIT. It adds 47 tokens to every session and 2,459 once invoked, about $0.0002 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 2026-08-30.
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