newb 0.5.2

Test your package through the eyes of a newbie agent — a fresh AI agent reads only your docs/skills and tries to use your package.

newb

A fresh AI agent reads only your docs and tries to use your package. If it succeeds, your docs work.

How it works

┌──────────────────────┐         ┌────────────────────────────────────┐         ┌──────────────────────┐
│   Your package       │         │   Fresh agent                      │         │   Report             │
│                      │  newb   │                                    │  asks   │                      │
│   ./docs/  or        │  spins  │   docker / local / apptainer       │  4 + N  │   what_for           │
│   ./_skills/<pkg>/   │   up    │   isolated HOME (no ~/.claude)     │  ────→  │   problems_solved    │
│   tests_newb.yaml    │         │   sees ONLY your docs              │  reads  │   quick_start        │
│   (optional)         │         │   no internet to your real session │  back   │   when_not_to_use    │
└──────────────────────┘         └────────────────────────────────────┘         │   tests[] (pass/fail)│
         │                                       ▲                              └──────────────────────┘
         └───────────── stages skills ───────────┘
                       (read-only mount)

The agent has no prior context — it sees only what you ship. If it answers the 4 canonical questions correctly and your tests_newb.yaml graders pass, your docs work for the realistic case of a brand-new user (or AI).

Install

pip install newb

Use

newb ./docs                                     # any dir of .md files
newb https://github.com/user/repo.git           # git URL — auto-clones
newb ./docs --format markdown >> README.md
newb ./docs --runtime local --auth claude-code  # host subprocess

Asks a fresh Claude agent four canonical questions (what for / problems solved / quick start / when not to use), plus any author-defined tests in tests_newb.yaml. Output: JSON (for CI) or markdown.

Author tests (tests_newb.yaml)

- name: redirects_parallel
  prompt: How do I run things in parallel?
  expect_contains: ["does not"]
  judge: "Must redirect to an alternative tool, not hallucinate."

Each test combines optional substring grading and an optional LLM judge.

Runtime · Auth

--runtime	what
docker	default — clean container, no host leakage
local	host subprocess with isolated HOME
apptainer	HPC (planned)

--auth	what
api-key	default — uses $ANTHROPIC_API_KEY
claude-code	copies host ~/.claude/.credentials*

Library

import newb
report = newb("./docs")
print(newb.render_markdown(report))

Requirements

• docker on PATH (or claude CLI if --runtime local)
• $ANTHROPIC_API_KEY (or --auth claude-code)
• Python 3.10+

License

AGPL-3.0-only.