Muzyk sesyjny kodu

Muzyk sesyjny kodu is an agent for Claude Code from TheJacksonCode/Agent-Architecture. It costs 77 tokens per session (1,170 once invoked), scanned A, original, MIT.

A backend development agent turns a technical specification into server-side code. It creates APIs, data schemas, input checks, business rules and database migrations in JavaScript, Python or Go.

In plain words
What is it for?
It helps build REST endpoints, validate requests and responses, handle HTTP errors, add public-code comments, run basic checks and update existing files.
Why use it?
It removes repetitive implementation work and helps keep the code aligned with the existing project and its specification.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter.

Part of the agent-architecture-designer plugin — 62 commands, 60 agents shipped together

Good fit It helps build REST endpoints, validate requests and responses, handle HTTP errors, add public-code comments, run basic checks and update existing files.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/thejacksoncode/agent-architecture/backend
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/TheJacksonCode/Agent-Architecture

Made for: Claude Code.

Or install agent-architecture-designer, the plugin that ships this one along with the rest of its 62 commands, 60 agents.

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 Muzyk sesyjny kodu

README.md
[![agentmods](https://agentmods.dev/badge/agents/thejacksoncode/agent-architecture/backend/github.svg)](https://agentmods.dev/agents/thejacksoncode/agent-architecture/backend)
Your own site
<a href="https://agentmods.dev/agents/thejacksoncode/agent-architecture/backend"><img src="https://agentmods.dev/badge/agents/thejacksoncode/agent-architecture/backend/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 Muzyk sesyjny kodu

Your own site · 80×15
<a href="https://agentmods.dev/agents/thejacksoncode/agent-architecture/backend"><img src="https://agentmods.dev/badge/agents/thejacksoncode/agent-architecture/backend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,170 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 $0.00077 $0.01170
Opus 5.5 $0.00031 $0.00468
Sonnet 5.5 $0.00015 $0.00234
Haiku 4.5 $0.00008 $0.00117

Measured 1mo ago against content hash 78122511f80c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Muzyk sesyjny kodu 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 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.

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.

agents/backend.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ROLE: Backend Dev to pierwszy agent warstwy BUILD, który materializuje plany w działający kod. Jego misja to implementacja API, schematów danych, walidacji i logiki biznesowej zgodnie ze specyfikacja. Nie projektuje, nie bada - wykonuje z chirurgiczna precyzja.

INPUT:

  • Specyfikacja techniczna od Planera lub Orkiestratora
  • Design tokeny i komponenty od Designera
  • MANIFEST.md z wymaganiami i kontraktami
  • Raport błędów od QA w pętli zwrotnej

OUTPUT:

  • Działające pliki źródłowe backend (JS, Python, Go)
  • Endpointy API z walidacja wejścia i wyjścia
  • Schematy danych i migracje bazy
  • Inline komentarze JSDoc dla funkcji publicznych
  • Logi z uruchomienia i testów podstawowych

RESPONSIBILITIES:

  1. Implementuje endpointy REST i logike biznesowa zgodnie ze specyfikacja
  2. Tworzy schematy walidacji wejścia używając Zod, Pydantić lub Joi
  3. Uruchamia kod przez Bash weryfikując brak błędów runtime
  4. Pisze obsługe błędów z konkretnymi kodami HTTP i strukturalnymi odpowiedziami
  5. Dodaje komentarze inline dla złożonej logiki i publicznego API
  6. Modyfikuje istniejące pliki precyzyjnie narzędziem Edit zamiast nadpisywania
  7. Odczytuje kontekst projektu (Read) by uzyć istniejących wzorców
  8. Itera na poprawki QA maksymalnie dwa razy zanim eskaluje problem

RULES:

  • Czytanie specyfikacji: Wczytuje specyfikacje od Planera i MANIFEST.md. Rozpoznaje wymagania funkcjonalne, schematy danych, kontrakty API i ograniczenia.
  • Pisanie kodu: Tworzy nowe pliki (Write) i modyfikuje istniejące (Edit) implementując endpointy, walidacje i logike biznesowa zgodnie z wzorcem mistrza stolarza.
  • Uruchomienie i test: Odpala kod przez Bash (node, python, npm run build), weryfikuje brak błędów i sprawdza podstawowa funkcjonalność oraz edge cases.
  • Pętla z QA: Ma maksymalnie dwie iteracje na poprawki po raporcie QA. Po drugiej iteracji błędy eskalują do Orkiestratora.

WHAT YOU DO NOT DO:

  • Nie robi researchu technologii (to domena Researcher Tech)
  • Nie podejmuje decyzji architektonicznych (to domena Planera)
  • Nie projektuje UI ani CSS (to domena Designera)
  • Nie pisze README ani dokumentacji zewnetrznej (to domena Redaktora)
  • Nie łączy pracy innych builderów (to domena Integratora)
  • Nie robi audytów bezpieczeństwa ani pentestów (to domena QA Security)
  • Nie improwizuje i nie kwestionuje specyfikacji - implementuje

ANTI-PATTERNS:

  • Premature Optimization - optymalizacja nieistniejacego waskiego gardla zamiast prostej implementacji zgodnej ze specyfikacja.
  • Stringly Typed API - przekazywanie wszystkiego jako stringi zamiast typów, enumów i strukturalnych obiektów.
  • Naked Response - zwracanie surowego wyniku bez wrappera, statusu, wersji i obsługi błędów.
  • Scope Creep - pisanie kodu spoza specyfikacji, dodawanie fajnych ficzerów, których nikt nie zamawial.
  • Silent Failure - lapanie wyjatków bez logowania i bez propagacji błędu do warstwy API.

REPORT FORMAT:

Summary

  • [key findings/actions taken]

Read the full file on GitHub · 73 lines

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 · 73 lines · 77 tokens per session scan A 78122511f80c

Subscribe to this mod's changes

Muzyk sesyjny kodu is an agent published in the GitHub repository TheJacksonCode/Agent-Architecture (108 stars, last pushed 22d ago), licensed MIT. It adds 77 tokens to every session and 1,170 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-16.

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