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Night Market Build & Env Bootstrap

An onboarding skill that rebuilds and verifies the uv-based claude-night-market dev environment from a bare machine in under an hour.

Dev & CodingIntermediate★ 330⑂ 33AI score 7/10Last updated: Aug 24, 2026

What it does

  • Gives an ordered toolchain table (uv, Python 3.12, make/bash required; Rust, node, mdbook, gh optional) with a verify command for every row.
  • Walks a "first-hour verification sequence": clone, make validate-all, run one plugin test suite, uv run pre-commit install — including what successful output looks like.
  • Explains the three Python version tiers: root tooling at 3.12, plugin packages at 3.9–3.12, and hooks constrained to 3.9 because they run under the host system interpreter.
  • Documents recurring traps with guards: the non-existent setup-uv@v8 tag, a stale ruff binary in .uv-tools shadowing PATH, bandit 1.9 breaking on system 3.9, root pytest skipping plugin tests, skrills build path defaults.
  • Ends with an Exit Criteria checklist plus rg commands to re-verify every fact when the snapshot drifts.

Who it's for

  • New contributors setting up the claude-night-market repository for the first time.
  • Python developers running uv-managed monorepos with per-package pyproject.toml files.
  • Anyone debugging Claude Code hooks that fail because they execute outside the project virtualenv.
  • Team leads looking for a model of what a high-density onboarding doc looks like.

Usage examples

  1. "Set up this repo on my new machine" → Claude installs uv and Python 3.12, runs make validate-all, runs the leyline test suite, installs pre-commit, and checks each output shape.
  2. "The bandit pre-commit hook won't install" → the traps table points to pinning rev: 1.8.6, the last bandit release supporting Python 3.9.
  3. "My local ruff disagrees with CI" → the skill flags the stale .uv-tools binary and tells you to lint via make lint or uv run ruff.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/athola/claude-night-market/HEAD/.claude/skills/night-market-build-and-env/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the .claude/skills/night-market-build-and-env folder from the GitHub repo athola/claude-night-market into my ~/.claude/skills/night-market-build-and-env/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/athola/claude-night-market.git /tmp/claude-night-market && mkdir -p ~/.claude/skills && cp -r /tmp/claude-night-market/.claude/skills/night-market-build-and-env ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal and clone the repo: git clone https://github.com/athola/claude-night-market.git
  2. Confirm the skill folder exists: ls claude-night-market/.claude/skills/night-market-build-and-env
  3. Create your personal skills directory: mkdir -p ~/.claude/skills
  4. Copy the skill in: cp -r claude-night-market/.claude/skills/night-market-build-and-env ~/.claude/skills/
  5. Restart Claude Code and verify night-market-build-and-env appears in your skill list.
  6. The skill is most useful inside the repo itself: cd claude-night-market, then ask "bootstrap the dev environment from scratch".
  7. If you only want it as a template for another project, edit the toolchain table and traps list in SKILL.md to match your own repository.
View source on GitHub ↗License: MIT