/backend
Python server code, APIs, async, strict typing.
$ npx -y skills add sipyourdrink-ltd/bernstein --skill backend --agent claude-codeHow it fires
How this skill gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
- You can call itInvoke it directly when you want it.
- Slash command
/backend
Context preview
The summary Claude sees to decide when to auto-load this skill.
Python server code, APIs, async, strict typing.
SKILL.md
backend.SKILL.mdname: 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).
Deterministic orchestrator for CLI coding agents (Claude Code, Codex, Gemini CLI, +40 more). No model in the coordination loop, so parallel runs in per-task git worktrees replay byte-identically. Signed lineage plus an opt-in HMAC audit chain a reviewer checks offline, without rerunning it. Cluster mode, air-gap deploy. https://bernstein.run
Repo: sipyourdrink-ltd/bernstein
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Open skill