Babysitter quantity-takeoff-calculator

Construction quantity takeoff skill for concrete, steel, earthwork, and materials

install

source · Clone the upstream repo

git clone https://github.com/a5c-ai/babysitter

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/a5c-ai/babysitter "$T" && mkdir -p ~/.claude/skills && cp -r "$T/library/specializations/domains/science/civil-engineering/skills/quantity-takeoff-calculator" ~/.claude/skills/a5c-ai-babysitter-quantity-takeoff-calculator && rm -rf "$T"

manifest: library/specializations/domains/science/civil-engineering/skills/quantity-takeoff-calculator/SKILL.md

Quantity Takeoff Calculator Skill

Purpose

The Quantity Takeoff Calculator Skill calculates construction quantities including concrete volumes, steel weights, earthwork quantities, and material takeoffs from drawings or BIM models.

Capabilities

Concrete volume calculation
Steel weight calculation
Earthwork quantities
Pipe and conduit lengths
Area calculations (formwork, finishes)
Unit conversion
Waste factor application
BIM-based takeoff

Usage Guidelines

When to Use

Estimating project quantities
Supporting cost estimates
Verifying contractor quantities
Planning material procurement

Prerequisites

Design documents available
Takeoff categories defined
Unit system established
Waste factors identified

Best Practices

Use consistent methods
Document measurement rules
Apply appropriate waste factors
Cross-check critical items

Process Integration

This skill integrates with:

Construction Cost Estimation
Specifications Development

Configuration

quantity-takeoff-calculator:
  categories:
    - concrete
    - steel
    - earthwork
    - masonry
    - piping
  sources:
    - bim-model
    - drawings
    - cad
  units:
    - imperial
    - metric

Output Artifacts

Quantity summaries
Material takeoffs
Cost backup data
BOM reports