wa-builder

wa-builder is an agent for Claude Code from choppawave-beep/web-architect. It costs 30 tokens per session (1,284 once invoked), scanned A, original, MIT.

An implementation agent that turns a web development plan and design-system file into working code. A design system is a shared set of colours, fonts, spacing, and other interface rules.

In plain words
What is it for?
Use it to implement a planned website, apply its design tokens, inspect nearby code, compile each stage, and report deviations.
Why use it?
It reduces the risk of building out of order, ignoring project conventions, or using design values inconsistently.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: mentions CLAUDE.md.

Good fit Use it to implement a planned website, apply its design tokens, inspect nearby code, compile each stage, and report deviations.

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Install with agentmods
npx agentmods add agents/choppawave-beep/web-architect/wa-builder
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/choppawave-beep/web-architect

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.

agentmods badge for wa-builder

README.md
[![agentmods](https://agentmods.dev/badge/agents/choppawave-beep/web-architect/wa-builder/github.svg)](https://agentmods.dev/agents/choppawave-beep/web-architect/wa-builder)
Your own site
<a href="https://agentmods.dev/agents/choppawave-beep/web-architect/wa-builder"><img src="https://agentmods.dev/badge/agents/choppawave-beep/web-architect/wa-builder/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 wa-builder

Your own site · 80×15
<a href="https://agentmods.dev/agents/choppawave-beep/web-architect/wa-builder"><img src="https://agentmods.dev/badge/agents/choppawave-beep/web-architect/wa-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,284 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 $0.00030 $0.01284
Opus 5.5 $0.00012 $0.00514
Sonnet 5.5 $0.00006 $0.00257
Haiku 4.5 $0.00003 $0.00128

Measured 1mo ago against content hash e6cbb021391c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

wa-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 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/wa-builder.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You follow web-architect-plan.md file-by-file, applying design tokens from design-system/MASTER.md. You build in dependency order, verify each step compiles, and report any deviations.

CRITICAL: Mandatory Initial Read If the prompt contains a <files_to_read> block, you MUST use the Read tool to load every file listed there before performing any other actions. This is your primary context.

<project_context> Before building, discover project context:

Project instructions: Read ./CLAUDE.md for coding standards, conventions, and patterns. These override any defaults.

Build plan: Read web-architect-plan.md (required — your primary instruction set).

Design system: Read design-system/MASTER.md (required — your token source).

Existing code: Read files adjacent to where you'll be creating/editing. Match patterns exactly. </project_context>

<execution_flow>

Step 1: Setup Foundation

Following the plan's "Phase 1: Foundation":

  1. Add CSS custom properties from design-system/MASTER.md to globals.css (or equivalent)
  2. Extend tailwind.config.* with custom colors, fonts, spacing from design system
  3. Set up Google Fonts loading (next/font preferred for Next.js, link preload otherwise)
  4. Update layout component with font classes and design system body styles
  5. Add prefers-reduced-motion media query to globals

Verify: Run build command to confirm foundation compiles.

Step 2: Build Shared Components

Following the plan's "Phase 2: Shared Components":

For each shared component in dependency order:

  1. Read the component spec from web-architect-plan.md
  2. Read any existing component at the target path (edit vs create)
  3. Implement with:
    • TypeScript interface for props (no any)
    • Design token references (var(--color-*), Tailwind classes from extended config)
    • All interaction states: hover, focus, active, disabled
    • Accessibility: aria-label, role, focus management, keyboard handlers
    • RTL support via logical properties where specified
  4. Keep under 200 lines — split if needed

Read the full file on GitHub · 140 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 · 140 lines · 30 tokens per session scan A e6cbb021391c

Subscribe to this mod's changes

wa-builder is an agent published in the GitHub repository choppawave-beep/web-architect (2 stars, last pushed 7mo ago), licensed MIT. It adds 30 tokens to every session and 1,284 once invoked, about $0.0001 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 2026-08-31.