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Contributing to OpenCLI

Thanks for your interest in contributing to OpenCLI.

Quick Start

# 1. Fork & clone
git clone git@github.com:<your-username>/opencli.git
cd opencli

# 2. Install dependencies
npm install

# 3. Build
npm run build

# 4. Run a few checks
npx tsc --noEmit
npx vitest run src/

# 5. Link globally (optional, for testing `opencli` command)
npm link

Adding a New Site Adapter

This is the most common type of contribution. Start with YAML when possible, and use TypeScript only when you need browser-side logic or multi-step flows.

YAML Adapter (Recommended for data-fetching commands)

Create a file like src/clis/<site>/<command>.yaml:

site: mysite
name: trending
description: Trending posts on MySite
domain: www.mysite.com
strategy: public      # public | cookie | header
browser: false        # true if browser session is needed

args:
  limit:
    type: int
    default: 20
    description: Number of items

pipeline:
  - fetch:
      url: https://api.mysite.com/trending

  - map:
      rank: ${{ index + 1 }}
      title: ${{ item.title }}
      score: ${{ item.score }}
      url: ${{ item.url }}

  - limit: ${{ args.limit }}

columns: [rank, title, score, url]

See hackernews/top.yaml for a real example.

TypeScript Adapter (For complex browser interactions)

Create a file like src/clis/<site>/<command>.ts:

import { cli, Strategy } from '../../registry.js';

cli({
  site: 'mysite',
  name: 'search',
  description: 'Search MySite',
  domain: 'www.mysite.com',
  strategy: Strategy.COOKIE,
  args: [
    { name: 'query', required: true, help: 'Search query' },
    { name: 'limit', type: 'int', default: 10, help: 'Max results' },
  ],
  columns: ['title', 'url', 'date'],

  func: async (page, kwargs) => {
    const { query, limit = 10 } = kwargs;
    await page.goto('https://www.mysite.com');

    const data = await page.evaluate(`
      (async () => {
        const res = await fetch('/api/search?q=${encodeURIComponent(query)}', {
          credentials: 'include'
        });
        return (await res.json()).results;
      })()
    `);

    return data.slice(0, Number(limit)).map((item: any) => ({
      title: item.title,
      url: item.url,
      date: item.created_at,
    }));
  },
});

Use opencli explore <url> to discover APIs and see CLI-EXPLORER.md if you need the full adapter workflow.

Validate Your Adapter

# Validate YAML syntax and schema
opencli validate

# Test your command
opencli <site> <command> --limit 3 -f json

# Verbose mode for debugging
opencli <site> <command> -v

Testing

See TESTING.md for the full guide and exact test locations.

npx vitest run src/           # Unit tests
npx vitest run tests/e2e/     # E2E tests
npx vitest run                # All tests

Code Style

  • TypeScript strict mode — avoid any where possible.
  • ES Modules — use .js extensions in imports (TypeScript output).
  • Naming: kebab-case for files, camelCase for variables/functions, PascalCase for types/classes.
  • No default exports — use named exports.

Commit Convention

We use Conventional Commits:

feat(twitter): add thread command
fix(browser): handle CDP timeout gracefully
docs: update CONTRIBUTING.md
test(reddit): add e2e test for save command
chore: bump vitest to v4

Common scopes: site name (twitter, reddit) or module name (browser, pipeline, engine).

Submitting a Pull Request

  1. Create a feature branch: git checkout -b feat/mysite-trending
  2. Make your changes and add tests when relevant
  3. Run the checks that apply: 
    npx tsc --noEmit           # Type check
npx vitest run src/        # Unit tests
opencli validate           # YAML validation (if applicable)
  4. Commit using conventional commit format
  5. Push and open a PR

License

By contributing, you agree that your contributions will be licensed under the Apache-2.0 License.