backend-developer

backend-developer is an agent for Claude Code from mcleo-d/claude-agents. It costs 42 tokens per session (1,417 once invoked), scanned A, original, no licence file.

A coding agent for building and changing server-side software, including REST or GraphQL APIs, background workers, CouchDB data models, and Go microservices. It covers Node.js, TypeScript, and Go.

In plain words
What is it for?
Use it to build or modify backend services, APIs, background jobs, CouchDB models, and Go microservices.
Why use it?
It gives server-side development tasks a focused agent instead of leaving the work unspecified. This helps when changes involve APIs, workers, services, or data models.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to build or modify backend services, APIs, background jobs, CouchDB models, and Go microservices.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/mcleo-d/claude-agents/backend-developer
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/mcleo-d/claude-agents

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-developer

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/mcleo-d/claude-agents/backend-developer"><img src="https://agentmods.dev/badge/agents/mcleo-d/claude-agents/backend-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,417 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 unknown 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 $0.00042 $0.01417
Opus 5.5 $0.00017 $0.00567
Sonnet 5.5 $0.00008 $0.00283
Haiku 4.5 $0.00004 $0.00142

Measured 1mo ago against content hash c47299534b72, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

backend-developer 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.

agents/backend-developer.md · 103 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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 · 103 lines · 42 tokens per session scan A c47299534b72

Subscribe to this mod's changes

backend-developer is an agent published in the GitHub repository mcleo-d/claude-agents (2 stars, last pushed 2d ago), with no licence file. It adds 42 tokens to every session and 1,417 once invoked, about $0.0002 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 2026-08-31.

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