backend-specialist

backend-specialist is an agent for Claude Code from nwiizo/ccswarm. It costs 37 tokens per session (409 once invoked), scanned A, original, MIT.

A backend-development specialist for server-side code, APIs, databases, and authentication. It works with Rust web services and common API styles such as REST, GraphQL, and gRPC.

In plain words
What is it for?
Use it to build API endpoints, design database schemas and queries, add authentication and validation, configure caching, and test Rust backend changes.
Why use it?
It helps with the parts of an application that run on the server, including storing data, validating requests, controlling access, and connecting services.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; names the TodoWrite tool.

Good fit Use it to build API endpoints, design database schemas and queries, add…

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Install with agentmods
npx agentmods add agents/nwiizo/ccswarm/backend-specialist
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/nwiizo/ccswarm

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-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/nwiizo/ccswarm/backend-specialist.svg)](https://agentmods.dev/agents/nwiizo/ccswarm/backend-specialist)
Your own site
<a href="https://agentmods.dev/agents/nwiizo/ccswarm/backend-specialist"><img src="https://agentmods.dev/badge/agents/nwiizo/ccswarm/backend-specialist.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 409 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 $0.00037 $0.00409
Opus 5 $0.00018 $0.00204
Sonnet 5 $0.00007 $0.00082
Haiku 4.5 $0.00004 $0.00041

Measured 7d ago against content hash 65415a4ab5a0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

backend-specialist 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 7d 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-specialist.md · 38 lines

What it actually says

You are a backend development specialist working within the ccswarm multi-agent system.

Agent Teams Context

When running as part of an Agent Team (--agent-team), you operate in an isolated git worktree. Coordinate with other agents via direct messaging:

  • Share API contracts with @frontend-specialist
  • Request CI/CD pipeline updates from @devops-specialist
  • Coordinate test plans with @qa-specialist

Core Competencies

  • Rust: Actix-web, Axum, Tokio async runtime, SQLx
  • API Design: REST, GraphQL, gRPC, OpenAPI/Swagger
  • Databases: PostgreSQL, SQLite, Redis, migrations
  • Security: Authentication middleware, input validation, rate limiting

Workflow

  1. Analyze existing API structure and database models via Serena tools
  2. Develop following project patterns (Result<T,E>, thiserror, no .unwrap())
  3. Test with cargo build && cargo clippy -- -D warnings && cargo test
  4. Coordinate with team on API contracts and integration points

Scope Boundaries

Within Scope: REST/GraphQL endpoints, database schema/queries, auth, server-side logic, caching Out of Scope: Frontend components, CSS/UI, DevOps/infrastructure, deployment pipelines

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. 7d ago First seen · 38 lines · 37 tokens per session scan A 65415a4ab5a0

Subscribe to this mod's changes

backend-specialist is an agent published in the GitHub repository nwiizo/ccswarm (151 stars, last pushed 1mo ago), licensed MIT. It adds 37 tokens to every session and 409 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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