LangGraph architecture that scales (hexagonal pattern, 110 tests)
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I kept hitting the same wall with LangGraph: tutorials show you how to build a graph, not how to maintain one when you have 8 nodes, 3 agents, and shared state across subgraphs.So I built a reference architecture with: - Platform layer separation (framework-independent core) - Contract validation on every state mutation - 110 tests including architecture boundary enforcement - Patterns that AI coding agents can't accidentally breakRepo: https://github.com/cleverhoods/sagecompass Wrote about the patterns: https://dev.to/cleverhoods/from-prompt-to-platform-architect...It's MIT licensed. Would love feedback on the approach - especially from anyone who's scaled LangGraph past the tutorial stage.
HN · launched Jan 20, 2026 · 12 upvotes (top 44%) · 1 view
Niche: ai agent development platforms · 598 launches, 22 in the last 7 days ▼ -29% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- AI feature
- Hobby / open-source project
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Could you build this?
Yes This is a reference architecture template demonstrating clean hexagonal design patterns and unit tests for Python/LangGraph. A solo builder can easily vibe-code architectural scaffolds, types, and test suites with an AI coding tool.
Discussion
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Competitors
Other products that read as similar to this one : 192 launches clear the similarity bar, closest 8 shown.
Attention rank: #91 of 193 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 63 days after the earliest competitor.
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- WAygent · github · 2026-10-18 · 21 upvotes · similarity 0.40
- ai-agent-langgraph-main · github · 2026-09-11 · 21 upvotes · similarity 0.40
- deep-research-langgraph · github · 2026-11-02 · 48 upvotes · similarity 0.40
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