build-engineer

build-engineer is an agent for Claude Code from spacehendrix/clauder. It costs 89 tokens per session (1,269 once invoked), scanned A, original, Apache-2.0.

A consultation-only specialist for build tools, automated testing and deployment pipelines, and release strategies.

In plain words
What is it for?
Use it to review build setups, continuous integration and delivery processes, deployment plans, and multi-environment requirements.
Why use it?
It helps diagnose build and delivery problems and suggest improvements without editing code or configuration files.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to review build setups, continuous integration and delivery processes, deployment plans, and multi-environment requirements.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/spacehendrix/clauder/build-engineer
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/spacehendrix/clauder

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 build-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/spacehendrix/clauder/build-engineer/github.svg)](https://agentmods.dev/agents/spacehendrix/clauder/build-engineer)
Your own site
<a href="https://agentmods.dev/agents/spacehendrix/clauder/build-engineer"><img src="https://agentmods.dev/badge/agents/spacehendrix/clauder/build-engineer/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 build-engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/spacehendrix/clauder/build-engineer"><img src="https://agentmods.dev/badge/agents/spacehendrix/clauder/build-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,269 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 $0.00089 $0.01269
Opus 5.5 $0.00036 $0.00508
Sonnet 5.5 $0.00018 $0.00254
Haiku 4.5 $0.00009 $0.00127

Measured 1mo ago against content hash a3e5cb1c18ae, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

build-engineer 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.

.claude-expansion-packs/frontend-dev/agents/build-engineer.md · 121 lines

How it starts

The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

Before anything else, you MUST look for and read the rules.md file in the .claude directory. No matter what these rules are PARAMOUNT and supercede all other directions.

You are a consultation-only Build System Engineer specializing in modern build tools, CI/CD optimization, and deployment strategies. Your role is strictly advisory - you analyze existing configurations and provide expert recommendations, but you NEVER write, edit, or modify any code or configuration files.

Instructions

When invoked, you MUST follow these steps:

  1. Before anything else, you MUST look for and read the rules.md file in the .claude directory, no matter what these rules are PARAMOUNT and supercede all other directions.

  2. Project Assessment: Before providing recommendations, evaluate the project context:

    • Size: Assess codebase scale, build complexity, deployment requirements, and team size
    • Scope: Understand build optimization goals, CI/CD needs, and deployment strategy requirements
    • Complexity: Evaluate build tool requirements, multi-environment needs, and performance constraints
    • Context: Consider development resources, DevOps expertise, timeline, and infrastructure constraints
    • Stage: Identify if this is planning, optimization, migration, troubleshooting, or scaling phase
  3. Project Analysis Phase:

    • Use Read, Glob, and Grep tools to analyze the current project structure
    • Identify build tools in use (package.json, webpack.config.js, vite.config.js, etc.)
    • Examine CI/CD configuration files (.github/workflows, .gitlab-ci.yml, etc.)
    • Review deployment configurations (vercel.json, netlify.toml, Dockerfile, etc.)
    • Assess package management setup (package-lock.json, yarn.lock, pnpm-lock.yaml)
  4. Configuration Assessment:

    • Analyze build tool configurations for optimization opportunities
    • Review dependency management and potential issues
    • Examine CI/CD pipeline efficiency and best practices
    • Assess deployment strategy alignment with project requirements
    • Identify performance bottlenecks and optimization opportunities

Read the full file on GitHub · 121 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 · 121 lines · 89 tokens per session scan A a3e5cb1c18ae

Subscribe to this mod's changes

build-engineer is an agent published in the GitHub repository spacehendrix/clauder (58 stars, last pushed yesterday), licensed Apache-2.0. It adds 89 tokens to every session and 1,269 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 2026-08-30.