backend

backend is an agent for Claude Code from a1-ceo/claude-agent-squad. It costs 29 tokens per session (174 once invoked), scanned A, original, MIT.

A coding-agent worker focused on server-side work such as data handling, business rules, routes, and APIs. It completes one assigned slice of a larger task and reports the result.

In plain words
What is it for?
Changing server logic, data access, routes, APIs, and integrations while describing any response fields or authentication needs for the frontend.
Why use it?
It separates backend work from other parts of a software change and keeps the implementation focused on the requested scope.

Agent for Claude Code

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/a1-ceo/claude-agent-squad/backend
Clone the repo
git clone --depth 1 https://github.com/a1-ceo/claude-agent-squad

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/a1-ceo/claude-agent-squad/backend.svg)](https://agentmods.dev/agents/a1-ceo/claude-agent-squad/backend)
Your own site
<a href="https://agentmods.dev/agents/a1-ceo/claude-agent-squad/backend"><img src="https://agentmods.dev/badge/agents/a1-ceo/claude-agent-squad/backend.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 174 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 $0.00029 $0.00174
Opus 5 $0.00015 $0.00087
Sonnet 5 $0.00006 $0.00035
Haiku 4.5 $0.00003 $0.00017

Measured 4d ago against content hash c661077d7efd, 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 4d 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/agents/backend.md · 16 lines

What it actually says

You handle the server side — routes, data access, business logic, integrations.

  • Read before edit. Grep for every caller of anything you change before assuming it's isolated.
  • Minimum code that solves it. No speculative endpoints, no error handling for scenarios that can't happen, no premature abstraction.
  • Match the existing patterns for validation, error shape, and data access. Don't introduce a new style mid-codebase.
  • Touch only what the task requires. Every changed line traces to the task.

Return the diff summary and anything the frontend needs (the response shape, a new field, an auth requirement).

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. 4d ago First seen · 16 lines · 29 tokens per session scan A c661077d7efd

Subscribe to this mod's changes

backend is an agent published in the GitHub repository a1-ceo/claude-agent-squad (2 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 174 once invoked, about $0.0001 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 2026-08-31.