What is minipainter AGENTS.md?

Project instructions for coding agents working on Minipainter, a Node.js command-line and terminal application for managing miniature-paint collections.

It helps install dependencies, run tests, use the paint search and matching commands, start the terminal interface or servers, and check the paint catalogue.

It gives agents the commands, setup details, testing process, and project rules needed to make changes safely in that codebase.

How ArturSkowronski/minipainter configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to ArturSkowronski/minipainter. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ArturSkowronski/minipainter/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/ArturSkowronski/minipainter

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/arturskowronski/minipainter/agents-md/github.svg)](https://agentmods.dev/instructions/arturskowronski/minipainter/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/arturskowronski/minipainter/agents-md"><img src="https://agentmods.dev/badge/instructions/arturskowronski/minipainter/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/arturskowronski/minipainter/agents-md"><img src="https://agentmods.dev/badge/instructions/arturskowronski/minipainter/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,460 This file is loaded in full into every session.

When invoked 1,460 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.01460	$0.01460
Opus 5	$0.00730	$0.00730
Sonnet 5	$0.00292	$0.00292
Haiku 4.5	$0.00146	$0.00146

Measured 9d ago against content hash fbd3a3acb36c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

minipainter AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — minipainter project guide for coding agents

A CLI + TUI + MCP servers (Claude and ChatGPT) for managing a miniature-paint inventory and doing owned-first cross-brand paint matching over a catalog of 1,607 paints. Node.js, ESM, tested with the built-in runner (npm test → node --test).

Humans: see README.md. CLAUDE.md carries the same paint-catalog rules and takes precedence.

Setup

npm install          # Node.js 20+ (the Docker image uses node:22-alpine)

No build step — everything runs straight from src/ (.mjs, native ESM).

Commands

npm test                          # whole suite: node --test over tests/*.test.mjs
node src/cli.mjs --help           # CLI entry point
node src/cli.mjs paint search bone
node src/cli.mjs inventory own "Abaddon Black"
node src/cli.mjs match color "#d2c29b"
node src/cli.mjs tui              # colored terminal UI (honors NO_COLOR)
node src/cli.mjs catalog lint     # fails if any paint has a null product_format
npm run generate:demo            # regenerate docs/assets/*.svg TUI captures

node src/mcp-server.mjs — MCP over stdio (Claude Desktop).
node src/mcp-http-server.mjs — HTTP server on PORT (default 3000): /mcp, /mcp/v3 (ChatGPT search/fetch/match_color), /health, /api/*.

Always run npm test before finishing; keep it green. Tests use import test from 'node:test'

node:assert/strict. External services in tests use in-memory fakes (pg-mem for Postgres) — npm test must never need a real database or network.

Storage (inventory)

Chosen at runtime in src/registry-store.mjs:

DATABASE_URL set → Postgres (owned_paints table). Used by Docker / Render / Fly.
unset → JSON file (~/.minipainting/inventory.json locally, /data/inventory.json in Docker).

Only the inventory (owned paint ids) is in the database; the catalog is always in-image files.

Run the full stack (Docker + Postgres)

docker compose up --build         # app + postgres:16; inventory persists in the pgdata volume

Read the full file on GitHub · 112 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

9d ago First seen · 112 lines · 1,460 tokens per session scan A fbd3a3acb36c

Subscribe to this mod's changes

minipainter AGENTS.md is an instructions file published in the GitHub repository ArturSkowronski/minipainter (0 stars, last pushed 18d ago), licensed MIT. It adds 1,460 tokens to every session, about $0.0073 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

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minipainter: Instructions file for Codex