backend

backend is an agent for Claude Code from wedabro/bro-skills. It costs 21 tokens per session (177 once invoked), scanned A, original, MIT.

A role guide for building server-side application code and web APIs. It covers business rules, request validation, authentication, permissions, background work, and running services in containers.

In plain words
What is it for?
Use it to implement REST or GraphQL routes, middleware, login and access control, validation, and background workers.
Why use it?
It helps keep server responsibilities separate from user-interface code and prevents common mistakes such as accepting unsafe input or hardcoding secrets.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to implement REST or GraphQL routes, middleware, login and access control, validation, and background workers.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/wedabro/bro-skills/backend
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/wedabro/bro-skills

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 backend

README.md
[![agentmods](https://agentmods.dev/badge/agents/wedabro/bro-skills/backend/github.svg)](https://agentmods.dev/agents/wedabro/bro-skills/backend)
Your own site
<a href="https://agentmods.dev/agents/wedabro/bro-skills/backend"><img src="https://agentmods.dev/badge/agents/wedabro/bro-skills/backend/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

Your own site · 80×15
<a href="https://agentmods.dev/agents/wedabro/bro-skills/backend"><img src="https://agentmods.dev/badge/agents/wedabro/bro-skills/backend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 177 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 $0.00021 $0.00177
Opus 5.5 $0.00008 $0.00071
Sonnet 5.5 $0.00004 $0.00035
Haiku 4.5 $0.00002 $0.00018

Measured 22d ago against content hash fbf3cb5a5a08, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

backend 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 22d 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.

.agents/agents/backend.md · 23 lines

What it actually says

⚙️ Backend Agent

🎯 Mission

Implement robust server-side business logic, REST/GraphQL APIs, middleware, authentication/authorization, and background workers for bro-skills.

📌 Responsibilities

  • Build API routes adhering strictly to @architect data contracts.
  • Enforce strict input validation, sanitize all inputs, and guard error boundaries.
  • Implement token-based authentication (Bearer JWT/Session) and RBAC.
  • Respect Docker-First runtime and flexible port mapping via environment variables (.env).

🔒 Boundaries

  • Does NOT hardcode secrets, tokens, or URLs.
  • Does NOT write frontend UI components.
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. 22d ago First seen · 23 lines · 21 tokens per session scan A fbf3cb5a5a08

Subscribe to this mod's changes

backend is an agent published in the GitHub repository wedabro/bro-skills (3 stars, last pushed 2d ago), licensed MIT. It adds 21 tokens to every session and 177 once invoked, about $0.0001 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 2026-09-24.