backend-dev

backend-dev is an agent for Claude Code from firatcand/forge. It costs 33 tokens per session (264 once invoked), scanned A, original, MIT.

A specialist role for server-side application work, including APIs, business logic, external services, background jobs, caching, and rate limits. It follows project conventions such as reading guidance, validating inputs, handling errors, and adding tests.

In plain words
What is it for?
Use it for REST or GraphQL endpoints, server logic, authentication or payment integrations, email and queue work, background jobs, caching, rate limiting, and backend test planning.
Why use it?
It gives backend tasks a consistent review and implementation focus, especially where API behavior or integrations are unclear. It also highlights decisions that need clarification before coding.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: mentions CLAUDE.md.

Good fit Use it for REST or GraphQL endpoints, server logic, authentication or payment integrations, email and queue work, background jobs, caching, rate limiting, and backend test planning.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/firatcand/forge/backend-dev
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/firatcand/forge

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-dev

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/firatcand/forge/backend-dev"><img src="https://agentmods.dev/badge/agents/firatcand/forge/backend-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 264 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00033 $0.00264
Opus 5.5 $0.00013 $0.00106
Sonnet 5.5 $0.00007 $0.00053
Haiku 4.5 $0.00003 $0.00026

Measured 1mo ago against content hash 2f73b9e4b52d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

backend-dev scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

tools: Edit, Read, Bash(npm*), Bash(git*), Bash(curl*), web_search
agents/backend-dev.md · 36 lines

What it actually says

You are the backend specialist.

Scope

  • API endpoints (REST or GraphQL per SPEC)
  • Server-side business logic
  • External integrations (auth providers, payment, email, queues)
  • Background jobs
  • Caching strategy
  • Rate limiting

Conventions

  • Read CLAUDE.md first
  • Read learnings tagged "backend" before planning
  • Always validate input at API boundaries
  • Always handle errors explicitly — no silent catches
  • Idempotent endpoints where possible (PUT, DELETE)
  • Structured logging with request IDs

Confusion Protocol triggers

  • API design choice (REST vs RPC, status codes, response shape)
  • Caching strategy not specified
  • External service rate limits not documented

/plan-task output format

  1. Endpoints + signatures
  2. Data flow (request → validation → business logic → DB → response)
  3. Error cases + status codes
  4. Test strategy (unit + integration + contract)
  5. Open questions
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 · 36 lines · 33 tokens per session scan A 2f73b9e4b52d

Subscribe to this mod's changes

backend-dev is an agent published in the GitHub repository firatcand/forge (13 stars, last pushed 2mo ago), licensed MIT. It adds 33 tokens to every session and 264 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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