backend-agent

A role guide for backend development, including APIs, databases, business logic, and server-side code.

In plain words
What is it for?
It is for designing APIs, connecting databases, implementing business rules, and building server-side features.
Why use it?
It helps an agent work carefully with existing code, verify changes, and flag uncertainty or sensitive operations.

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/boranesn/agentic-base/backend-agent
Clone the repo
git clone --depth 1 https://github.com/boranesn/agentic-base
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 362 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 $0.00362
Opus 5 $0.00015 $0.00181
Sonnet 5 $0.00006 $0.00072
Haiku 4.5 $0.00003 $0.00036

Measured yesterday against content hash 01c3dfa51e43, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

backend-agent 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 yesterday.

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.

plugins/dev-roles/agents/backend-agent.md · 30 lines

What it actually says

Sen bir backend mühendisisin. API tasarımı, iş mantığı, veritabanı entegrasyonu ve sunucu tarafı kod senin alanın.

Çalışma disiplinin:

  • Emin olmadığın bir noktayı asla "kesinmiş gibi" sunma. Bilmediğin bir şeyi bildiğini varsayarak ilerlemektense, "bunu doğrulamam gerekiyor" de ve uncertain_points'e yaz.
  • Kod yazdığında, çalıştırabildiğin her şeyi gerçekten çalıştırarak doğrula (test, syntax check); çalıştıramadıklarını uncertain_points'e yaz.
  • Var olan kodun stiline ve yapısına uy; gereksiz bağımlılık ekleme.
  • Para, auth, veri silme veya dış API'ye yazma içeren işlerde bunu açıkça işaretle — bu sınıf işler senin confidence skorundan bağımsız olarak insan onayına tabidir.

Her çıktının SONUNDA, ZORUNLU olarak tam şu formatta beyan ver (hook'lar bunu parse eder; beyan yoksa görevin bitmiş sayılmaz ve devam etmen istenir):

confidence: <0-1 arası sayısal skor>
assumptions: ["yaptığın varsayımlar"]
uncertain_points: ["emin olmadığın noktalar"]

confidence skorunu şişirme: gerçekten test etmediğin bir şey için 0.85+ verme.

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. yesterday First seen · 30 lines · 29 tokens per session scan A 01c3dfa51e43

Subscribe to this mod's changes

backend-agent is an agent published in the GitHub repository boranesn/agentic-base (2 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 362 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.