model-selection

vamseeachanta

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About

This skill provides automated model selection guidance for Claude Code based on task complexity, cost, and latency needs. It offers a decision tree and quick reference table to help developers choose between Opus, Sonnet, and Haiku models efficiently. Use it when starting new tasks to optimize performance and resource usage.

Quick Install

Claude Code

Recommended

Primary

npx skills add vamseeachanta/workspace-hub

Plugin CommandAlternative

/plugin add https://github.com/vamseeachanta/workspace-hub

Git CloneAlternative

git clone https://github.com/vamseeachanta/workspace-hub.git ~/.claude/skills/model-selection

Copy and paste this command in Claude Code to install this skill

Documentation

Model Selection Skill

Version: 1.0.0 Category: Optimization Triggers: Starting tasks, choosing Claude model, usage optimization

Quick Reference

Model Selection Decision Tree

NEW TASK
    │
    ├── WORK REPO + COMPLEX → OPUS
    ├── WORK REPO + STANDARD → SONNET
    ├── PERSONAL + SIMPLE → HAIKU
    └── DEFAULT → SONNET

Quick Selection Guide

Model	Target %	Use For
OPUS	30%	Architecture, multi-file refactoring (>5 files), security review
SONNET	40%	Standard implementations, code review, documentation
HAIKU	30%	Quick queries, status checks, simple operations

Automated Model Suggestion

# Get model recommendation before each task
./scripts/monitoring/suggest_model.sh <repository> "<task description>"

# Examples:
./scripts/monitoring/suggest_model.sh digitalmodel "Design authentication architecture"
# → Recommends: OPUS (complexity score: 4)

./scripts/monitoring/suggest_model.sh digitalmodel "Implement user login"
# → Recommends: SONNET (complexity score: 1)

./scripts/monitoring/suggest_model.sh hobbies "Quick file check"
# → Recommends: HAIKU (complexity score: -3)

Complexity Scoring

Algorithm evaluates:

Keywords - architecture/refactor → +3, implement/feature → +1, check/status → -2
Repository Tier - Work Tier 1 → +1, Personal → -1
Task Length - >15 words → +1, <5 words → -1

Score Mapping:

Score ≥3: OPUS
Score 0-2: SONNET
Score <0: HAIKU

Repository Tiers

Work Repositories

Tier 1 (Production): 60% Opus, 30% Sonnet, 10% Haiku

digitalmodel, energy, frontierdeepwater

Tier 2 (Active): 30% Opus, 50% Sonnet, 20% Haiku

assetutilities, worldenergydata

Tier 3 (Maintenance): 10% Opus, 30% Sonnet, 60% Haiku

doris, saipem, OGManufacturing

Personal Repositories

Active: 20% Opus, 40% Sonnet, 40% Haiku Experimental: 5% Opus, 25% Sonnet, 70% Haiku Archive: 0% Opus, 20% Sonnet, 80% Haiku

Usage Monitoring

Check before starting work: https://claude.ai/settings/usage

Alert Thresholds:

Sonnet >70% → Switch to Opus/Haiku
Session >80% → Batch work or wait
Overall >80% → Defer non-critical

OPUS Use Cases

✅ Multi-file refactoring (>5 files) ✅ Architecture decisions ✅ Complex algorithm design ✅ Security-critical code review ✅ Cross-repository coordination ✅ Performance optimization strategies

SONNET Use Cases

✅ Standard feature implementation ✅ Code review (single PR) ✅ Documentation writing ✅ Test generation ✅ Bug fixing (standard complexity) ✅ Configuration updates

HAIKU Use Cases

✅ File existence checks ✅ Simple grep/search operations ✅ Quick status updates ✅ Log analysis (pattern matching) ✅ Template generation ✅ Format validation

Emergency Protocols

If Sonnet >80%

⛔ STOP using Sonnet immediately
✅ Switch to Opus for critical work
✅ Switch to Haiku for everything else
📅 Defer non-urgent work to Tuesday

If Session >80%

⏸️  Pause AI tasks
⏰ Wait for session reset (~3-4 hours)
📦 Batch work for next session

Full Reference

See: @docs/AI_MODEL_SELECTION_AUTOMATION.md See: @docs/CLAUDE_MODEL_SELECTION_QUICK_REFERENCE.md

Use this when starting tasks, selecting models, or optimizing AI usage.

GitHub Repository

vamseeachanta/workspace-hub

Path: .claude/skills/ai/optimization/model-selection

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