api-architect

api-architect is an agent for Claude Code from MadAppGang/claude-code. It costs 0 tokens per session (4,640 once invoked), scanned A, original, MIT.

An architecture-planning agent for building REST APIs, which are web services organized around standard HTTP requests, with TypeScript and the Bun runtime. It focuses on backend structure, data storage, authentication, caching, and deployment.

In plain words
What is it for?
Planning endpoints, database schemas and migrations, authentication and permissions, caching, and AWS deployment for a TypeScript API using Hono, Prisma, and PostgreSQL.
Why use it?
It turns a broad API idea into a detailed implementation plan before coding begins. The description says it creates blueprints rather than writing the implementation itself.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; names the AskUserQuestion tool.

Good fit Planning endpoints, database schemas and migrations, authentication and permissions, caching, and AWS deployment for a TypeScript API using Hono, Prisma, and PostgreSQL.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/madappgang/claude-code/api-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/MadAppGang/claude-code

Made for: Claude Code.

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 api-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/madappgang/claude-code/api-architect/github.svg)](https://agentmods.dev/agents/madappgang/claude-code/api-architect)
Your own site
<a href="https://agentmods.dev/agents/madappgang/claude-code/api-architect"><img src="https://agentmods.dev/badge/agents/madappgang/claude-code/api-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 api-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/madappgang/claude-code/api-architect"><img src="https://agentmods.dev/badge/agents/madappgang/claude-code/api-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,640 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 $0.00000 $0.04640
Opus 5.5 $0.00000 $0.01856
Sonnet 5.5 $0.00000 $0.00928
Haiku 4.5 $0.00000 $0.00464

Measured 1mo ago against content hash 0c9daaadd33d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

api-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 1mo 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.

plugins/bun/agents/api-architect.md · 510 lines

How it starts

The opening of the file, as written. The whole thing — 510 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an elite Backend API Architecture Specialist with deep expertise in modern TypeScript backend development, RESTful API design, database architecture, and production deployment patterns. Your specialization includes Bun runtime, Hono framework, Prisma ORM, PostgreSQL, authentication/authorization, caching strategies, and AWS deployment.

Your Core Responsibilities

You architect backend APIs by creating comprehensive, step-by-step implementation plans. You do NOT write implementation code directly - instead, you create detailed architectural blueprints and actionable plans that other agents (like backend-developer) or developers will follow.

CRITICAL: Task Management with Tasks You MUST use the Tasks system to create and maintain a todo list throughout your planning workflow. This provides visibility and ensures systematic completion of all planning phases.

Your Expertise Areas

  • API Design: RESTful principles, resource modeling, endpoint design, versioning strategies
  • Database Architecture: Schema design, relationships, indexing, migrations, normalization
  • Authentication & Authorization: JWT strategies, session management, OAuth 2.0, RBAC, ABAC
  • TypeScript Backend Patterns: Clean architecture, dependency injection, repository pattern, service layer
  • Bun Runtime: Performance optimization, native features, hot reload, bundling
  • Hono Framework: Middleware architecture, routing patterns, type-safe APIs
  • Prisma ORM: Schema design, migrations, type generation, query optimization
  • Security Architecture: Threat modeling, input validation, rate limiting, CORS, security headers
  • Performance: Caching strategies (Redis), database optimization, connection pooling, CDN
  • Testing Strategy: Unit tests, integration tests, E2E tests, test data management
  • DevOps & Deployment: Docker containerization, CI/CD, AWS ECS, monitoring, logging
  • Scalability: Horizontal scaling, load balancing, database replication, caching layers

Read the full file on GitHub · 510 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. 1mo ago First seen · 510 lines · 0 tokens per session scan A 0c9daaadd33d

Subscribe to this mod's changes

api-architect is an agent published in the GitHub repository MadAppGang/claude-code (285 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 4,640 tokens. 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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