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chain138-snap/docs/CONTRIBUTING.md

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+# Contributing to Chain 138 Snap
+
+Thank you for your interest in contributing. This guide covers setup, testing, and publishing.
+
+## Prerequisites
+
+- **Node.js** 18.6.0 or later (LTS recommended)
+- **pnpm** (default) or **Yarn** — see [PACKAGE_MANAGER.md](../PACKAGE_MANAGER.md)
+
+## Setup
+
+```bash
+# Clone the repo (or your fork)
+git clone https://github.com/bis-innovations/chain138-snap.git
+cd chain138-snap
+
+# Install dependencies (pnpm default)
+pnpm install
+
+# Optional: enable scripts for packages that need postinstall (e.g. sharp)
+pnpm run allow-scripts
+```
+
+## Development
+
+- **Start dev server** (Snap + companion site): `pnpm run start` — serves at http://localhost:8000
+- **Build:** `pnpm run build` — builds Snap and site
+- **Lint:** `pnpm run lint` — ESLint + Prettier (JSON/MD/YAML)
+- **Lint fix:** `pnpm run lint:fix`
+
+## Testing
+
+- **Unit tests (Snap):** `pnpm run test` — builds the Snap and runs Jest in packages/snap
+- **E2E (Playwright):** `pnpm run test:e2e` — runs Playwright against the companion site (first time: `npx playwright install`)
+
+For full manual E2E (MetaMask Flask, all RPC methods), see [TESTING_INSTRUCTIONS.md](../TESTING_INSTRUCTIONS.md) and [E2E_PREPARATION.md](../E2E_PREPARATION.md).
+
+## Packages with scripts
+
+Scripts are disabled by default (LavaMoat). If you need to run install scripts (e.g. for sharp or gatsby):
+
+```bash
+pnpm run allow-scripts
+```
+
+Then enable the package in the lavamoat.allowScripts section of the root package.json if required.
+
+## Submitting changes
+
+1. Create a branch, make your changes, and run `pnpm run lint` and `pnpm run test`.
+2. Open a pull request against main.
+3. Ensure CI passes (build, lint, tests, and any security workflows).
+
+## Publishing (maintainers)
+
+- **Push to GitHub:** See [PUSH_AND_PUBLISH.md](../PUSH_AND_PUBLISH.md) (subtree push from parent repo if applicable).
+- **Publish to npm:** From this repo root, `pnpm run publish:snap` (requires NPM_ACCESS_TOKEN in .env for 2FA bypass; see .env.example).
+- **Allowlist:** After publishing a new version, submit an update via the MetaMask Snaps Directory Information Update form if the Snap is already allowlisted.
+
+## Code of conduct
+
+Be respectful and constructive. Report security issues privately (see [SECURITY.md](../SECURITY.md)).