Babysitter opensim-modeler

OpenSim musculoskeletal modeling skill for biomechanical simulation and analysis

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 "$T/library/specializations/domains/science/biomedical-engineering/skills/opensim-modeler" ~/.claude/skills/a5c-ai-babysitter-opensim-modeler && rm -rf "$T"

manifest: library/specializations/domains/science/biomedical-engineering/skills/opensim-modeler/SKILL.md

OpenSim Modeler Skill

Purpose

The OpenSim Modeler Skill facilitates musculoskeletal modeling and simulation using OpenSim, supporting biomechanical analysis, device design, and clinical research applications.

Capabilities

Model scaling to subject anthropometry
Inverse kinematics and dynamics
Static optimization
Computed muscle control
Joint reaction analysis
Custom model development
Prosthetic/orthotic integration
Muscle force estimation
Metabolic cost prediction
Sensitivity analysis
Model validation workflows

Usage Guidelines

When to Use

Creating subject-specific musculoskeletal models
Estimating muscle forces and joint loads
Evaluating prosthetic/orthotic designs
Supporting surgical planning

Prerequisites

Motion capture data available
Subject anthropometric measurements
Base musculoskeletal model selected
Experimental markers defined

Best Practices

Validate model scaling with experimental data
Assess inverse kinematics residuals
Verify physiological muscle activations
Document model modifications

Process Integration

This skill integrates with the following processes:

Gait Analysis and Musculoskeletal Modeling
Orthopedic Implant Biomechanical Testing
Clinical Study Design and Execution
Human Factors Engineering and Usability

Dependencies

OpenSim software
MATLAB/Python scripting
Motion capture data
Musculoskeletal model libraries
Computational resources

Configuration

opensim-modeler:
  model-types:
    - lower-extremity
    - upper-extremity
    - full-body
    - spine
  analysis-tools:
    - inverse-kinematics
    - inverse-dynamics
    - static-optimization
    - CMC
    - joint-reaction
  output-variables:
    - muscle-forces
    - joint-moments
    - joint-reactions
    - metabolic-cost

Output Artifacts

Scaled musculoskeletal models
Kinematics results
Muscle force estimates
Joint reaction forces
Simulation reports
Validation metrics
Sensitivity analysis results
Visualization files

Quality Criteria

Model scaling matches subject anthropometry
Inverse kinematics residuals acceptable
Muscle activations physiologically plausible
Joint reactions validated where possible
Results reproducible
Documentation complete