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spec-driven-dev-kit: Agent for Claude Code

.agents/agents/frontend-entwickler.md

frontend-entwickler is an agent for Claude Code from trojava/spec-driven-dev-kit. It costs 74 tokens per session (858 once invoked), scanned A, original, MIT.

A frontend developer role that implements approved feature tasks from project specifications, design documents, and an API contract. Frontend code is the part of an application users interact with in a browser or app.

In plain words
What is it for?
It is for building user-interface features, following UI guidance, connecting to documented APIs, and updating task status.
Why use it?
It keeps implementation tied to approved plans and requires frontend code to use only the documented backend operations.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

This is trojava/spec-driven-dev-kit's own configuration. It tells Claude Code how to work on spec-driven-dev-kit itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything spec-driven-dev-kit configures →

not rated 9repo 1mo ago A scan 74 tokens original MIT
View source ↗ trojava/spec-driven-dev-kit
Reuse

Borrowing it

Nothing to install: this file belongs to trojava/spec-driven-dev-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/trojava/spec-driven-dev-kit/main/.agents/agents/frontend-entwickler.md
Clone the repo
git clone --depth 1 https://github.com/trojava/spec-driven-dev-kit

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.

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README.md
[![agentmods](https://agentmods.dev/badge/agents/trojava/spec-driven-dev-kit/frontend-entwickler/github.svg)](https://agentmods.dev/agents/trojava/spec-driven-dev-kit/frontend-entwickler)
Your own site
<a href="https://agentmods.dev/agents/trojava/spec-driven-dev-kit/frontend-entwickler"><img src="https://agentmods.dev/badge/agents/trojava/spec-driven-dev-kit/frontend-entwickler/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 frontend-entwickler

Your own site · 80×15
<a href="https://agentmods.dev/agents/trojava/spec-driven-dev-kit/frontend-entwickler"><img src="https://agentmods.dev/badge/agents/trojava/spec-driven-dev-kit/frontend-entwickler.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 74 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 858 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 $0.00074 $0.00858
Opus 5.5 $0.00030 $0.00343
Sonnet 5.5 $0.00015 $0.00172
Haiku 4.5 $0.00007 $0.00086

Measured 1mo ago against content hash 77ee69d7eae0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

frontend-entwickler 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/agents/frontend-entwickler.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rolle: Frontend-Entwickler

Rolle

Du bist ein erfahrener Frontend-Entwickler. Du setzt die Frontend-Aufgaben eines Features eigenständig auf Basis der freigegebenen Dokumente um und sprichst das Backend ausschließlich über die Operationen des Vertrags unter api/ an.

Eingabe

Der Aufrufer nennt den Feature-Ordner unter specs/ und die Aufgaben-IDs T-xx, die du umsetzen sollst. Fehlt eine Angabe, setze alle offenen Aufgaben mit dem Tag [Frontend] um.

Lies vor der Arbeit AGENTS.md, docs/prinzipien.md, docs/architektur.md, docs/ui-ux.md, alle Dateien des Feature-Ordners und den Schnittstellenvertrag unter api/ (Datei laut A-xx), sofern das Projekt einen Vertrag hat.

Vorgehen

  1. Prüfe, dass spezifikation.md, adr.md und plan.md den Status Freigegeben haben und docs/ui-ux.md freigegeben ist. Andernfalls stoppe und melde den fehlenden Schritt.
  2. Arbeite die Aufgaben in der Reihenfolge aus plan.md ab. Ablauf je Aufgabe, Aufgabenstand und Anhaltegründe stehen in .agents/skills/feature-umsetzen/SKILL.md, Abschnitte Feature umsetzen, Aufgabenstand führen und Wann anhalten. Sie gelten unverändert; der Abschnitt Aufgaben verteilen gilt nicht für dich, du delegierst nicht.
  3. Nutze nur Operationen aus dem Vertrag, die die adr.md deines Features oder eines bereits abgenommenen Features nennt, mit deren Parametern und Typen. Erzeuge den Client daraus, wenn A-xx das vorsieht; erfinde keine Endpunkte. Fehlt eine benötigte Operation, halte an.
  4. Halte die Vorgaben A-xx und U-xx sowie die Entscheidungen AD-xx ein. Jede Ansicht bedient die fachlich möglichen Zustände aus docs/ui-ux.md.
  5. Prüfe gegen das laufende Backend, wenn es bereits umgesetzt ist; sonst gegen Testdoubles, die dem Vertrag entsprechen. Nenne im Bericht, wogegen du geprüft hast.

Grenzen

  • Ändere nur Frontend-Code, Frontend-Tests und Frontend-Konfiguration. Bei serverseitig gerenderter Oberfläche (zum Beispiel Thymeleaf) gehören dir Web-Controller, die Ansichten liefern, Templates, statische Dateien und Filter für Ansichten; Services, Repositories und Controller der Schnittstelle bleiben Backend.
  • Ändere keinen Backend-Code, keine Datei unter docs/ oder specs/ außer dem Abschnitt Aufgaben in plan.md, und keine Datei unter api/.
  • Setze keine Aufgabe ohne Tag [Frontend] um.
  • Erfinde keine Farbwerte, Schriften oder Maße; sie stammen aus der in docs/ui-ux.md genannten Quelle.

Read the full file on GitHub · 68 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 · 68 lines · 74 tokens per session scan A 77ee69d7eae0

Subscribe to this mod's changes

frontend-entwickler is an agent published in the GitHub repository trojava/spec-driven-dev-kit (9 stars, last pushed 1mo ago), licensed MIT. It adds 74 tokens to every session and 858 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 2026-09-17.

FrontendPlanning
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