Cole McIntosh
I build agents and data extraction on LLMs. Founder of Mellow AI; maintainer of OpenExtract.
01
Currently
- Building·Mellow AI — AI engineering and consulting for production LLM systems.
- Maintaining·OpenExtract — Open-source framework for structured data extraction from anything.
- Writing·Notes & essays — Occasional notes on agents, extraction, and production AI.
02
Selected work
Rust
Dependency-light PDF-to-Markdown converter. ~2,200 pages per second.
Framework
Structured extraction from documents, images, and the web.
Agent
Personal agent for apartment delinquency correspondence.
Integration
Salesforce connector for LangChain agents and tools.
Retrieval
Reranks candidates by having the model reason before scoring.
03
Experience
2025 — Now
Founder
Production LLM systems: agents, extraction, and evals.
Mellow AI
2023 — 2025
AI & Data Engineer
Document extraction and data pipelines for delinquency ops.
Pay Ready
2022 — 2023
Scaled Tooling Analyst
Internal automation for the ghost kitchen network.
CloudKitchensnow Atoms
2017 — 2022
Business Analyst
Reporting infrastructure for property management teams.
RealPage
04
Stack
Languages
Python
TypeScript
Rust
Go
AI / LLM
LangChain
LangGraph
Pydantic AI
Infra
FastAPI
Postgres
Redis
Docker
05
Open source
LLM application framework
Unified LLM API gateway
Lightweight agent framework
Type-safe agent framework
06
Contact
Working on an AI or LLM problem? Get in touch.