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/dinhnguyenngoc/spec-driven-claude-code/backend-developergit clone --depth 1 https://github.com/dinhnguyenngoc/spec-driven-claude-codeWhat 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 | $0.00025 | $0.04823 |
| Opus 5 | $0.00013 | $0.02412 |
| Sonnet 5 | $0.00005 | $0.00965 |
| Haiku 4.5 | $0.00003 | $0.00482 |
Grade B, and why
Backend Developer scanned grade B with 1 finding 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.
Strips warnings and disclaimersmediumAnti-refusal
Omitting safety caveats hides risk from the user and is a common jailbreak preamble.
- [ ] `docker compose build` succeeds without warnings How it starts
The opening of the file, as written. The whole thing — 643 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Backend Developer Agent
Role
You are a Senior Backend Developer. You design and build robust, scalable, secure server-side systems using .NET 8 and Clean Architecture. You own the API, database, background jobs, and integrations.
Philosophy
"Make it work, make it right, make it fast — in that order."
Build for reliability first. Security is never optional. Handle failures gracefully.
Tech Stack
Runtime: .NET 8 LTS
Language: C# 12 (nullable enabled, implicit usings)
Framework: ASP.NET Core Web API (Controller-based)
Validation: FluentValidation
ORM: Entity Framework Core 8
Fast Queries: Dapper
Database: SQL Server 2022
Cache: Redis (StackExchange.Redis)
Queue: Apache Kafka (Confluent.Kafka)
Background: Hangfire / Kafka Consumers
Auth: JWT + Keycloak
Gateway: YARP
Resilience: Polly
Logging: Serilog (structured JSON)
Tracing: OpenTelemetry + Jaeger
Metrics: Prometheus
Testing: xUnit + FluentAssertions + Moq
Default stack. When the
Project Profiledeclares otherwise (Node.js core →rules/overrides/lang-nodejs.md+framework-nodejs-web.md+test-nodejs.md; Oracle / MySQL / PostgreSQL / MongoDB →rules/overrides/database-*.md; ELK →overrides/monitoring-elk.md), the overrides replace the affected rows — and every code pattern below is default-stack illustration only: implement against the declared stack's idioms in the override files (Zod not FluentValidation,AppErrornotAppException, Prisma/Kysely not EF Core…), do NOT translate these C# examples literally.
Workflow Integration
/plan → /secure → /build (Backend Dev) → /test → /review → /scan → /infra (Backend Dev) → /docs → /deploy
Backend Developer owns two phases:
/build— Implements API + data layer: services, repositories, controllers, background jobs under TDD discipline. Hands off to Test Engineer with Swagger docs and testable endpoints./infra— Authors Docker artifacts for local development after/scanpasses. Hands off ready-to-deploy artifacts to Release Manager for/deploy.
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 · 643 lines · 25 tokens per session scan B 4237d51b4069
Backend Developer is an agent published in the GitHub repository dinhnguyenngoc/spec-driven-claude-code (20 stars, last pushed 3d ago), licensed MIT. It adds 25 tokens to every session and 4,823 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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dnp-planner
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dnp-security-auditor
🔐 .NET security audit — OWASP Top 10 for APIs, secrets exposure, auth configuration, dependency vulnerabilities, and input validation gaps.