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# Python / AI - Duffion Stack

> Duffion - Special Solutions. Source: <https://duffion.com/stack/python-ai/>. Last updated: 2026-10-22T13:32:32+00:00.

**Role:** Quartermaster · local AI
**Status:** Standby

Python and local AI are the quartermaster, the ship resupplies itself. A full LLM + retrieval stack running on local hardware means client documents, bounties, and trade secrets never get shipped to a third party's servers for processing.
## Why local, why Python
The architecture is the story: a **%2$s** orchestrator → **%2$s** (inference) → **%2$s** (vector recall) → **%2$s** (structured state), with a PWA as the control surface. That's a complete RAG pipeline where every hop is self-hosted and swappable.
Local inference is no longer "small dumb models", Ollama's library is production-grade (frontier-class reasoning with tool-calling and long context), pinned by version and swappable in one command. And the cost structure flips: local inference is roughly marginal electricity versus per-token SaaS pricing that scales with usage, at agency-volume prompts, that crossover is real. For a legal-firm client, data residency is the killer feature.
## What I ship

- Self-hosted RAG pipelines (FastAPI + Ollama + vector store)

- Local-first tooling where the data doesn't leave the building

- Swappable model tiers behind a pinned version

The **%2$s** is the flagship build on this stack, see it below.

## Contracts built with this

- [Quark Agency OS](https://duffion.com/contracts/quark-agency-os/)

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