frontend-builder

frontend-builder is an agent for Claude Code from WeaveMindAI/weft. It costs 100 tokens per session (2,405 once invoked), scanned A, original, no licence file.

An autonomous agent that builds the project’s frontend under `front/`. It uses the project’s specified SvelteKit, PostgreSQL, authentication, and UI tools while keeping the API token on the server.

In plain words
What is it for?
Use it to build the pages and frontend behaviour required by a project task.
Why use it?
It gives a defined agent responsibility for building the user-facing web application and handling its server-side connection safely.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it to build the pages and frontend behaviour required by a project task.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/weavemindai/weft/frontend-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/WeaveMindAI/weft

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 frontend-builder

README.md
[![agentmods](https://agentmods.dev/badge/agents/weavemindai/weft/frontend-builder/github.svg)](https://agentmods.dev/agents/weavemindai/weft/frontend-builder)
Your own site
<a href="https://agentmods.dev/agents/weavemindai/weft/frontend-builder"><img src="https://agentmods.dev/badge/agents/weavemindai/weft/frontend-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 frontend-builder

Your own site · 80×15
<a href="https://agentmods.dev/agents/weavemindai/weft/frontend-builder"><img src="https://agentmods.dev/badge/agents/weavemindai/weft/frontend-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 100 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,405 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 unknown 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 $0.00100 $0.02405
Opus 5.5 $0.00040 $0.00962
Sonnet 5.5 $0.00020 $0.00481
Haiku 4.5 $0.00010 $0.00241

Measured 12d ago against content hash 3b2de4126b28, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

frontend-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 12d 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.

tangle/claude-code/.claude/agents/frontend-builder.md · 80 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 12d ago Changed 3b2de4126b28
  2. 15d ago Changed · +10 lines 2712d15820bd
  3. 20d ago Changed · +5 lines 7ca3d4df1fd0
  4. 24d ago First seen · 65 lines · 100 tokens per session scan A 4eb2825c27e2

Subscribe to this mod's changes

frontend-builder is an agent published in the GitHub repository WeaveMindAI/weft (2,002 stars, last pushed today), with no licence file. It adds 100 tokens to every session and 2,405 once invoked, about $0.0004 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 2026-09-23.