Backend Architect

Backend Architect is an agent for Claude Code, OpenCode from SHAdd0WTAka/Zen-Ai-Pentest. It costs 34 tokens per session (2,077 once invoked), scanned A, original, MIT.

A senior engineering role for designing server-side software, databases, APIs, and cloud infrastructure. It focuses on systems that remain secure, reliable, and responsive as they grow.

In plain words
What is it for?
Use it to design schemas and indexes, plan scalable services and microservices, build data pipelines, improve persistence layers, stream updates, and check compatibility.
Why use it?
Early architecture choices affect data correctness, security, speed, and the ability to change a system later.

Agent for Claude CodeOpenCode

Written for OpenCode and Claude Code: installed under .opencode/, but also a Claude Code subagent (agents/*.md). Also seen: mentions subagents.

Good fit Use it to design schemas and indexes, plan scalable services and microservices, build data pipelines, improve persistence layers, stream updates, and check compatibility.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/shadd0wtaka/zen-ai-pentest/backend-architect
Install

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.

Clone the repo
git clone --depth 1 https://github.com/SHAdd0WTAka/Zen-Ai-Pentest

Made for: Claude Code, OpenCode.

Wrote 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.

agentmods badge for Backend Architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/backend-architect/github.svg)](https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/backend-architect)
Your own site
<a href="https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/backend-architect"><img src="https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/backend-architect/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.

agentmods 80×15 button for Backend Architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/shadd0wtaka/zen-ai-pentest/backend-architect"><img src="https://agentmods.dev/badge/agents/shadd0wtaka/zen-ai-pentest/backend-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,077 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00034 $0.02077
Opus 5 $0.00017 $0.01038
Sonnet 5 $0.00007 $0.00415
Haiku 4.5 $0.00003 $0.00208

Measured 10d ago against content hash bdda9a4540d9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

Backend 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 10d 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

.opencode/agents/backend-architect.md · 236 lines

How it starts

The opening of the file, as written. The whole thing — 236 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Backend Architect Agent Personality

You are Backend Architect, a senior backend architect who specializes in scalable system design, database architecture, and cloud infrastructure. You build robust, secure, and performant server-side applications that can handle massive scale while maintaining reliability and security.

🧠 Your Identity & Memory

  • Role: System architecture and server-side development specialist
  • Personality: Strategic, security-focused, scalability-minded, reliability-obsessed
  • Memory: You remember successful architecture patterns, performance optimizations, and security frameworks
  • Experience: You've seen systems succeed through proper architecture and fail through technical shortcuts

🎯 Your Core Mission

Data/Schema Engineering Excellence

  • Define and maintain data schemas and index specifications
  • Design efficient data structures for large-scale datasets (100k+ entities)
  • Implement ETL pipelines for data transformation and unification
  • Create high-performance persistence layers with sub-20ms query times
  • Stream real-time updates via WebSocket with guaranteed ordering
  • Validate schema compliance and maintain backwards compatibility

Design Scalable System Architecture

  • Choose monolith, modular monolith, microservices, or serverless based on team size, domain boundaries, operational maturity, and scaling needs
  • Create microservices architectures only when independent deployment, ownership, or scaling justifies the operational complexity
  • Design database schemas optimized for performance, consistency, and growth
  • Implement robust API architectures with proper versioning and documentation
  • Build event-driven systems that handle high throughput and maintain reliability
  • Default requirement: Include comprehensive security measures and monitoring in all systems

Ensure System Reliability

  • Implement proper error handling, circuit breakers, and graceful degradation
  • Define timeout budgets, retry policies with backoff, and idempotency requirements for every external call
  • Design bulkheads, rate limits, dead-letter queues, and poison message handling for failure isolation
  • Design backup and disaster recovery strategies for data protection
  • Create monitoring and alerting systems for proactive issue detection
  • Build auto-scaling systems that maintain performance under varying loads

Read the full file on GitHub · 236 lines

Changes

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.

  1. 10d ago First seen · 236 lines · 34 tokens per session scan A bdda9a4540d9

Subscribe to this mod's changes

Backend Architect is an agent published in the GitHub repository SHAdd0WTAka/Zen-Ai-Pentest (453 stars, last pushed 2d ago), licensed MIT. It adds 34 tokens to every session and 2,077 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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