Obscura Browser

Obscura Browser

Overview

Use this skill to help users operate the obscura CLI and connect client libraries to its CDP server. Prefer short, executable commands first, then add optional flags or sample code only if they help the user's scenario. For local development, default to Vite + hostc + Obscura instead of suggesting localhost access.

Workflow

1. Detect whether obscura is available locally before giving run commands.
2. If it is missing, explain the shortest install path for the current OS.
3. If the target is local development, do not suggest patching Obscura or using localhost directly. Default to:
   • local app on Vite or another dev server
   • hostc to expose the local port as a public https:// URL
   • Obscura against the public URL
4. Pick the narrowest Obscura flow that matches the request:
   • fetch for one page or one extraction
   • scrape for multiple URLs in parallel
   • serve for Playwright or Puppeteer CDP connections
5. Return one minimal command or one minimal code sample first.
6. Add only the flags that matter for the user's goal such as --stealth, --timeout, --wait-until, --output, --concurrency, or --quiet.

Quick Start

Run scripts/detect_obscura.py first. It checks:

• whether obscura is on PATH
• whether obscura-worker is present in the same directory
• likely local binary locations on Windows, macOS, and Linux

If the binary is missing:

• Recommend the GitHub Releases archive for the user's platform.
• On Windows, remind the user to keep obscura.exe and obscura-worker.exe in the same folder for parallel scrape.
• If the user wants to build from source, mention cargo build --release and cargo build --release --features stealth.

Task Patterns

Local development with Vite

Treat this as the default answer when users want Obscura to hit http://localhost:5173 or another local Vite port.

Recommended flow:

1. Keep Vite running locally.
2. Expose the Vite port with hostc.
3. Give Obscura the resulting public https:// URL.

Use scripts/command_templates.py vite-hostc to generate the shortest working command set. Use scripts/command_templates.py vite-hostc-cdp when the user wants the hostc flow plus a ready-to-run Playwright or Puppeteer snippet.

Minimal sequence:

pnpm dev
npx hostc 5173
obscura fetch https://your-hostc-url --dump html

If the user needs browser automation instead of one fetch:

obscura serve --port 9222

Then provide a Playwright or Puppeteer snippet that navigates to the hostc URL.

Example:

python scripts/command_templates.py vite-hostc-cdp playwright --public-url https://your-hostc-url

Local development with listhen

Use this only as a backup option when the user explicitly wants listhen or already has it. The important part is the public tunnel URL, not the local listener.

Do not recommend:

• localhost
• 127.0.0.1
• LAN IPs such as 192.168.x.x
• source patches to disable SSRF protections unless the user explicitly asks for code changes

Single-page extraction

Use scripts/command_templates.py fetch to build a starter command, then adapt it.

Common examples:

obscura fetch https://example.com --eval "document.title"
obscura fetch https://example.com --dump links
obscura fetch https://news.ycombinator.com --dump html --wait-until networkidle0

Prefer:

• --eval for one DOM expression or computed value
• --dump html|text|links for built-in output modes
• --output when the user wants a file

Parallel scraping

Use scripts/command_templates.py scrape when users provide multiple URLs or ask for concurrency.

Common example:

obscura scrape https://example.com https://example.org --concurrency 10 --eval "document.querySelector('h1')?.textContent" --format json

Prefer --quiet when the output is meant for scripts or piping.

CDP server for Playwright or Puppeteer

Use scripts/command_templates.py serve to build the launch command and scripts/command_templates.py cdp for sample client code.

Typical serve command:

obscura serve --port 9222

Add:

• --stealth when anti-detection matters
• --proxy <url> when a proxy is required
• --workers <n> when parallel CDP worker processes are useful

Then provide the matching client snippet:

• Playwright uses chromium.connectOverCDP({ endpointURL: 'ws://127.0.0.1:9222' })
• Puppeteer uses puppeteer.connect({ browserWSEndpoint: 'ws://127.0.0.1:9222/devtools/browser' })

Response Style

Keep responses practical:

• Start with environment status if it is unknown.
• Give the exact command to run next.
• If code is needed, provide one minimal working snippet.
• Mention assumptions when choosing flags.

References

Read these only when needed:

• references/cli-cheatsheet.md for command patterns and flag selection
• references/cdp-integration.md for Playwright and Puppeteer connection details
• references/local-dev-tunnels.md for Vite + hostc + Obscura and listhen fallback guidance

Scripts

• scripts/detect_obscura.py Use to find installed binaries and validate worker co-location.
• scripts/command_templates.py Use to generate starter commands and code snippets for fetch, scrape, serve, CDP clients, and the default Vite + hostc + Obscura flow.