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Night Market Architecture Contract

Documents the load-bearing design decisions, enforced invariants, and known weak points of the claude-night-market repo for judging design changes.

Dev & CodingAdvanced★ 342⑂ 36AI score 7/10Last updated: Oct 2, 2026

What it does

  • States six load-bearing design decisions of the claude-night-market repo, each backed by an ADR, a commit hash, or a checked-in enforcement file: self-contained plugins, the Python 3.9 hook constraint, one ecosystem version fanned out to all manifests, the finite skill-discovery budget, external collective memory/trust, and the three skill roles.
  • Gives an invariants table pairing each rule with the thing that enforces it (CI workflows, ratchet scripts, guard tests) and the failure mode if it is weakened.
  • Lists six known weak points openly: silent skill-discovery overflow, unpinned mdbook, per-plugin mypy/pytest, reliance on undocumented Stop-hook re-injection for the autonomous loop, and more.
  • Includes a 23-row ADR digest, a "use this other skill instead" routing table, exit criteria, and verification commands (rg, git log, python3) for re-checking volatile facts.

Who it's for

  • Contributors to (or forkers of) the claude-night-market repository.
  • Tech leads who want a model for documenting architecture rules in a large multi-plugin Claude Code monorepo.
  • Anyone looking for a concrete example of wiring ADRs to CI enforcement.

Examples

  1. Someone proposes consolidating duplicated tasks_manager.py across three plugins — the skill cites ADR-0001 plus commits 054e2679 (consolidation), 29961cd2 (revert), d89a55c7 (per-plugin copies as the durable fix) to reject the re-proposal.
  2. Before adding a hook — it enforces reading the payload as JSON on stdin (not CLAUDE_TOOL_* env vars), no relative paths, safe imports under a bare interpreter, and a subprocess timeout under the hooks.json budget.
  3. When bumping a version — never hand-edit manifests; run uv run python plugins/sanctum/scripts/update_versions.py <version>.
  4. When writing a new skill description — stay under the 160-character cap and spend the characters on trigger phrases rather than restating the name.

· · · 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-architecture-contract/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-architecture-contract folder from the GitHub repo athola/claude-night-market into my ~/.claude/skills/night-market-architecture-contract/.
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 && mkdir -p ~/.claude/skills && cp -r claude-night-market/.claude/skills/night-market-architecture-contract ~/.claude/skills/

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

  1. Open a terminal and change into your working directory.
  2. Clone the repository: git clone https://github.com/athola/claude-night-market.git
  3. Create the skills directory: mkdir -p ~/.claude/skills
  4. Copy the skill: cp -r claude-night-market/.claude/skills/night-market-architecture-contract ~/.claude/skills/
  5. Restart Claude Code and try a prompt like "review this design change" to confirm the skill loads.
  6. Note: every path and command inside this skill only resolves within the claude-night-market repo. Elsewhere, read it as a reference template and rewrite the facts for your own codebase.
View source on GitHub ↗License: MIT