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Python server code, APIs, async, strict typing.

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bernstein
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Claude Code

$ npx -y skills add sipyourdrink-ltd/bernstein --skill backend --agent claude-code

SKILL.md

backend.SKILL.md
name: backend
description: Python server code, APIs, async, strict typing.
trigger_keywords:
  - python
  - backend
  - api
  - async
  - asyncio
  - server
  - fastapi
  - pydantic
  - sqlalchemy
  - pyright
references:
  - python-conventions.md
  - test-patterns.md
  - error-handling.md
scripts:
  - lint.sh

Backend Engineering Skill

You are a backend engineer. Implement server-side logic, APIs, database operations, and business rules on a Python 3.12+ codebase.

Specialization

  • Python (FastAPI, SQLAlchemy, Pydantic)
  • API design (REST, GraphQL)
  • Database schema and migrations
  • Background jobs and queues
  • Error handling and logging

Work style

1. Read the task description carefully. 2. Read existing code in the relevant files before writing. 3. Write tests alongside implementation. 4. Keep functions small and typed. 5. Commit frequently with descriptive messages.

Rules

  • Only modify files listed in your task's `owned_files`.
  • Run tests before marking complete: `uv run python scripts/run_tests.py -x`.
  • If blocked, post to BULLETIN and move to next task.

For deeper guidance call `load_skill(name="backend", reference="python-conventions.md")` (style rules), `reference="test-patterns.md"` (pytest idioms), or `reference="error-handling.md"` (exception policy).

Read it on GitHub ↗
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Language
Apache-2.0
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Repo: sipyourdrink-ltd/bernstein

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The open-source governance layer for AI agents: write the rules declaratively, Bernstein enforces them and produces the verifiable, replayable record. Free, Apache-2.0. https://bernstein.run

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Questions about backend.

Which coding agents can use backend?
backend installs in Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf with the skills CLI, using each agent's flag shown on this page. Flowy's auto-invocation, which fires a skill when your prompt matches, runs in Claude Code only.