grey-haven-llm-project-development

# LLM Project Development Skill

Build **production LLM applications** using proven methodology from Karpathy's HN Time Capsule, Vercel d0, Manus, and Anthropic's research.

**Core principle**: Validate manually first, then build deterministic pipelines around the non-deterministic LLM core.

## Supporting Documentation

All files under 500 lines per Anthropic best practices:

- **[references/](references/)** - Methodology foundations
  - [case-studies.md](references/case-studies.md) - Karpathy, Vercel d0, Manus patterns
  - [pipeline-patterns.md](references/pipeline-patterns.md) - Python/TypeScript code patterns
  - [INDEX.md](references/INDEX.md) - Reference navigation

- **[examples/](examples/)** - Grey Haven implementations
  - [tanstack-pipeline.md](examples/tanstack-pipeline.md) - TanStack Start example
  - [fastapi-pipeline.md](examples/fastapi-pipeline.md) - FastAPI backend example
  - [INDEX.md](examples/INDEX.md) - Examples navigation

- **[templates/](templates/)** - Copy-paste starters
  - [pipeline-template.ts](templates/pipeline-template.ts) - TypeScript pipeline
  - [pipeline-template.py](templates/pipeline-template.py) - Python pipeline

- **[checklists/](checklists/)** - Validation
  - [llm-project-checklist.md](checklists/llm-project-checklist.md) - Pre-launch checklist

## The Methodology

### Phase 1: Task-Model Fit Analysis

**Before writing any code, determine if LLMs are the right tool.**

#### LLM-Suited Tasks

| Characteristic | Why LLMs Excel | Grey Haven Example |
|----------------|----------------|-------------------|
| **Synthesis over precision** | Combining context, not calculating | Summarizing tenant activity |
| **Subjective judgment** | No single correct answer | Categorizing support tickets |
| **Error tolerance** | Graceful degradation acceptable | Content recommendations |
| **Human-like processing** | Natural language understanding | Chat-based tenant onboarding |
| **Creative output** | Novel combinations required | Generatin