Hey HN,

I've spent the last few months building Lár (Irish for "core"). It's a Python framework for building AI agents, but heavily inspired by the philosophy of "Glass Box" engineering rather than magical "Black Boxes".

The Problem: Most agent frameworks today (LangChain, AutoGen) feel like magic. They hide the prompt chains, the state transitions, and the retry logic. When they break in production, debugging is a nightmare.

The Solution: Lár is designed to be the "PyTorch for Agents". It uses a "Define-by-Run" architecture where: 1. Agents are just directed graphs (Nodes + Edges). 2. Every state transition is immutable and logged. 3. The engine produces a JSON "Flight Log" that makes the agent 100% auditable (useful for 21 CFR Part 11 compliance in healthcare/finance).

Tech Stack: - IDE Friendly: Clone, `pip install`, and run. Build an agent in minutes. - Zero Friction Models: Switch from Cloud to Local in 1 line. Just change `"gpt-4"` to `"ollama/phi4"`. No code refactoring. - Hybrid Architecture: We proved that using code for logic (instead of LLMs) makes Lár 60x cheaper and significantly faster than standard "Chain" frameworks. - Enterprise Patterns: Includes 18 Core Patterns out of the box (e.g., A/B Testing, Resumable Graphs, Security Firewalls). - Just-in-Time Integrations: Don't wait for API wrappers. Drag our "Integration Builder" prompt into your IDE and get a type-safe tool in 30 seconds. - Air-Gap Capable: No telemetry, no hidden clouds. Run entirely offline.

It’s open source (Apache 2.0). I’d love to hear what you think about the "Audit-first" approach vs the current "Chat-first" trend.

Website: https://snath.ai Docs: https://docs.snath.ai Repo: https://github.com/snath-ai/lar

3 Killer Demos:

1. Self-Healing Code Agent: https://github.com/snath-ai/code-repair-demo 2. Glass Box RAG: https://github.com/snath-ai/rag-demo 3. Customer Support Swarm: https://github.com/snath-ai/customer-support-demo

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