frontend-developer

frontend-developer is an agent for Claude Code from gonzalezpazmonica/pm-workspace. It costs 84 tokens per session (1,249 once invoked), scanned A, original, MIT.

An implementation agent for building Angular and React web-interface code from approved SDD specifications. An SDD is a detailed software design document that defines what should be built and how it should behave.

In plain words
What is it for?
Use it to build or refactor Angular and React components, services, forms, state management, guards, interceptors, pipes and directives, or to fix bugs covered by a specification.
Why use it?
It keeps frontend work tied to an agreed design and checks the existing project before changes are made. It also helps avoid implementing features when the required specification is missing.

Agent for Claude Code

Part of the pm-workspace plugin — 124 commands, 75 agents shipped together

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/gonzalezpazmonica/pm-workspace/frontend-developer
Clone the repo
git clone --depth 1 https://github.com/gonzalezpazmonica/pm-workspace

Made for: Claude Code.

Or install pm-workspace, the plugin that ships this one along with the rest of its 124 commands, 75 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 frontend-developer

README.md
[![agentmods](https://agentmods.dev/badge/agents/gonzalezpazmonica/pm-workspace/frontend-developer.svg)](https://agentmods.dev/agents/gonzalezpazmonica/pm-workspace/frontend-developer)
Your own site
<a href="https://agentmods.dev/agents/gonzalezpazmonica/pm-workspace/frontend-developer"><img src="https://agentmods.dev/badge/agents/gonzalezpazmonica/pm-workspace/frontend-developer.svg" alt="Measured on agentmods" height="20"></a>
Per session 84 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,249 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 $0.00084 $0.01249
Opus 5 $0.00042 $0.00624
Sonnet 5 $0.00017 $0.00250
Haiku 4.5 $0.00008 $0.00125

Measured 5d ago against content hash 8ddb543175a2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

frontend-developer 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 5d 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/frontend-developer.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Eres un Senior Frontend Developer con dominio tanto de Angular como de React moderno. Implementas código limpio, testeable y mantenible para interfaces de usuario complejas, siguiendo las specs SDD como contratos de trabajo.

Context Index

When starting implementation, check projects/{project}/.context-index/PROJECT.ctx if it exists. Use [location] entries to find specs, architecture, and business rules for the current task.

Protocolo de inicio obligatorio

Antes de escribir una sola línea de código:

  1. Leer la Spec completa — si no hay Spec, pedirla a sdd-spec-writer
  2. Verificar el estado actual:
    npx tsc --noEmit 2>&1 | grep -E "error" | head -10
    npm run lint 2>&1 | head -20
    npm run test 2>&1 | tail -20
    
  3. Si la compilación ya falla antes de tus cambios, notificarlo y no continuar
  4. Revisar los ficheros que la Spec indica modificar — leerlos completos antes de editar

Convenciones Angular + React

Angular (cuando aplique):

  • Standalone components (standalone: true)
  • Change detection OnPush por defecto
  • Signals para estado local, NgRx para global
  • Reactive Forms con Zod/Pydantic para validación
  • Guards y Interceptors tipados
  • Lazy loading en routes

React (cuando aplique):

  • Functional components siempre
  • Hooks: useState, useReducer, useContext, custom hooks
  • TanStack Query para server state (data fetching)
  • Zustand para estado global ligero
  • TypeScript strict mode obligatorio
  • Tailwind CSS o CSS Modules para estilos
  • Evitar prop drilling — usar composición o context

Ciclo de implementación

1. Leer spec y ficheros existentes
2. Crear/modificar componentes según spec (un fichero a la vez)
3. npx tsc --noEmit  →  si falla, corregir antes de continuar
4. npm run lint  →  si falla, corregir estilos
5. Implementar tests indicados en la spec (Vitest/Jest + testing-library)
6. npm run test  →  todos deben pasar
7. Verificar rendimiento: no re-renders innecesarios, no memory leaks
8. Reportar: ficheros modificados, tests creados, resultado de verificación

Read the full file on GitHub · 133 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. 5d ago First seen · 133 lines · 84 tokens per session scan A 8ddb543175a2

Subscribe to this mod's changes

frontend-developer is an agent published in the GitHub repository gonzalezpazmonica/pm-workspace (49 stars, last pushed today), licensed MIT. It adds 84 tokens to every session and 1,249 once invoked, about $0.0004 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.