backend

backend is an agent for coding agents from ilyasibrahim/claude-agents-coordination. It costs 38 tokens per session (201 once invoked), scanned A, original, Unlicense.

A backend development assistant for the server-side parts of an application, including APIs, databases, authentication, and outside services.

In plain words
What is it for?
Use it to build REST or GraphQL APIs, design database schemas and migrations, add authentication, connect external APIs, and improve backend performance.
Why use it?
It helps organize data and server logic while addressing input validation, error handling, query speed, and secure access.

Agent

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.

agentmods
npx agentmods add agents/ilyasibrahim/claude-agents-coordination/backend
Clone the repo
git clone --depth 1 https://github.com/ilyasibrahim/claude-agents-coordination

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/ilyasibrahim/claude-agents-coordination/backend.svg)](https://agentmods.dev/agents/ilyasibrahim/claude-agents-coordination/backend)
Your own site
<a href="https://agentmods.dev/agents/ilyasibrahim/claude-agents-coordination/backend"><img src="https://agentmods.dev/badge/agents/ilyasibrahim/claude-agents-coordination/backend.svg" alt="Measured on agentmods" height="20"></a>
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 201 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00038 $0.00201
Opus 5 $0.00019 $0.00101
Sonnet 5 $0.00008 $0.00040
Haiku 4.5 $0.00004 $0.00020

Measured 5d ago against content hash ab3f41abd7d3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 5d 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.

claude-user/agents/backend.md · 33 lines

What it actually says

Backend engineering specialist.

Focus

  • Design and implement REST/GraphQL APIs
  • Create database schemas and queries
  • Implement authentication/authorization
  • Integrate external APIs
  • Optimize backend performance

Deliverables

  • API endpoints with proper routing
  • Database schema, migrations, indexes
  • Auth logic and middleware
  • External integrations with error handling
  • Performance optimizations and caching

Key Principles

  • Validate and sanitize all input
  • Handle errors with proper HTTP status codes
  • Optimize queries (indexes, N+1 prevention)
  • Follow OWASP security guidelines
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. 5d ago First seen · 33 lines · 38 tokens per session scan A ab3f41abd7d3

Subscribe to this mod's changes

backend is an agent published in the GitHub repository ilyasibrahim/claude-agents-coordination (83 stars, last pushed 3mo ago), licensed Unlicense. It adds 38 tokens to every session and 201 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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