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Show HN: Plain – The full-stack Python framework designed for humans and agents

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Why This Matters

Plain is a full-stack Python framework emphasizing clarity, predictability, and human-friendly code, making it easier for developers and AI agents to build robust applications. Its explicit typing, class-based views, and integrated tooling streamline development workflows and improve code maintainability. This approach bridges the gap between human developers and AI agents, fostering more efficient and reliable software creation.

Key Takeaways

Plain

The full-stack Python framework designed for humans and agents.

Get started

mkdir my-app && cd my-app && claude "$(curl -sSf https://plainframework.com/start.md)"

Also works with Codex, Amp, OpenCode, or your agent of choice.

Why Plain?

Explicit, typed, and predictable. What's good for humans is good for agents.

Here's what Plain code looks like:

# app/users/models.py from plain import postgres from plain . postgres import types from plain . passwords . models import PasswordField @ postgres . register_model class User ( postgres . Model ): email : str = types . EmailField () password : str = PasswordField () display_name : str = types . CharField ( max_length = 100 ) is_admin : bool = types . BooleanField ( default = False ) created_at : datetime = types . DateTimeField ( auto_now_add = True ) query : postgres . QuerySet [ User ] = postgres . QuerySet () model_options = postgres . Options ( constraints = [ postgres . UniqueConstraint ( fields = [ "email" ], name = "unique_email" ), ], )

Views are class-based:

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