builder

builder is an agent for Claude Code from marvinleonbutlerii/.dotfiles. It costs 49 tokens per session (894 once invoked), scanned A, original, no licence file.

An implementation agent for complex coding tasks that involve several steps, such as exploring a codebase and changing its files.

In plain words
What is it for?
It is used to implement features, fix bugs, refactor code, and handle other tasks requiring both investigation and modification.
Why use it?
It delegates code writing, bug fixes, and refactoring to an agent intended for multi-step implementation work.

Agent for Claude Code

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

Good fit It is used to implement features, fix bugs, refactor code, and handle other tasks requiring both investigation and modification.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/marvinleonbutlerii/.dotfiles/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/marvinleonbutlerii/.dotfiles

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 builder

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/marvinleonbutlerii/.dotfiles/builder"><img src="https://agentmods.dev/badge/agents/marvinleonbutlerii/.dotfiles/builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 894 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 $0.00049 $0.00894
Opus 5 $0.00024 $0.00447
Sonnet 5 $0.00010 $0.00179
Haiku 4.5 $0.00005 $0.00089

Measured 8d ago against content hash d4243c4d94c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

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 8d 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.

home/.claude/agents/builder.md · 95 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 8d ago First seen · 95 lines · 49 tokens per session scan A d4243c4d94c0

Subscribe to this mod's changes

builder is an agent published in the GitHub repository marvinleonbutlerii/.dotfiles (2 stars, last pushed 5d ago), with no licence file. It adds 49 tokens to every session and 894 once invoked, about $0.0002 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 2026-08-31.