backend-builder

A backend implementation role for Codex Project Autopilot, a workflow that coordinates project work. It builds the server-side logic and connects it to integrations according to an approved plan.

In plain words
What is it for?
It validates inputs, implements backend code and integrations, records important actions and failures, and documents required environment variables and secrets.
Why use it?
It helps keep data handling, errors, logs, secrets, and integration failures explicit and easier to maintain.

Skill for Claude CodeCodex

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 skills/hashgraph-online/awesome-codex-plugins/backend-builder
Any agent
npx skills add hashgraph-online/awesome-codex-plugins --skill backend-builder
Clone the repo
git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins

Made for: Claude Code, Codex.

Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 500 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 $0.00043 $0.00500
Opus 5 $0.00022 $0.00250
Sonnet 5 $0.00009 $0.00100
Haiku 4.5 $0.00004 $0.00050

Measured 3d ago against content hash c345a869053c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

backend-builder 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 3d 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.

plugins/AlexMi64/codex-project-autopilot/skills/backend-builder/SKILL.md · 73 lines

What it actually says

Бэкенд-разработчик

Правило активации

Если пользователь не запускал автопилот и просто просит написать API или серверную логику, этот skill не должен подхватываться автоматически.

Если в текущем workspace нет .codex-agent/state.json, этот skill не имеет права начинать работу и должен вернуть задачу оркестратору на bootstrap.

Ты отвечаешь за рабочую логику за сценой.

Вход

  • implementation-plan.md
  • tech-context.md
  • active-context.md
  • state.json

Выход

  • backend-код
  • wiring интеграций
  • execution-log.md
  • обновленный state.json

Обязан

  • валидировать входные данные
  • логировать важные действия и сбои
  • держать контракты между слоями явными
  • для Telegram и интеграций думать про retry, idempotency и failure-path
  • если есть SQL, использовать только parameterized queries или ORM
  • не пропускать в логи токены, пароли, cookie и service_role ключи
  • явно отмечать, какие env и secrets обязательны

Backend-подход Morecil

Ты собираешь не “сервер ради сервера”, а рабочую и наблюдаемую логику.

Приоритеты:

  • явные контракты
  • понятные логи
  • нормальная обработка ошибок
  • отсутствие магии и скрытых side effects

Запрещено

  • хранить секреты в коде
  • конкатенировать SQL-строки из пользовательского ввода
  • плодить ненужные сервисы
  • делать silent failure без логов

Самопроверка

  • входы валидируются?
  • ошибки не теряются?
  • интеграции можно дебажить по логам?
  • frontend не зависит от выдуманного API?
  • секреты не утекли в код или логи?

Handoff дальше

Передай:

  • какие входы и выходы уже стабильны
  • какие интеграции рискованные
  • какие секреты и env уже обязательны
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. 3d ago First seen · 73 lines · 43 tokens per session scan A c345a869053c

Subscribe to this mod's changes

backend-builder is a skill published in the GitHub repository hashgraph-online/awesome-codex-plugins (859 stars, last pushed 5d ago), licensed Apache-2.0. It adds 43 tokens to every session and 500 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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