feat: add replicate-webhooks skill

[leggetter]

Summary

Add webhook skill for Replicate with complete implementation including:

• SKILL.md with signature verification code and prediction event handling
• Express, Next.js, and FastAPI examples with comprehensive tests
• Reference documentation for overview, setup, and verification

What's Included

• SKILL.md - Main skill file with essential webhook handler code
• references/ - overview.md, setup.md, verification.md
• examples/ - Express, Next.js, FastAPI with test suites

Notes

Uses Hookdeck CLI for local development (intentional choice for webhook inspection UI and consistency with other skills in this repository).

Testing

cd skills/replicate-webhooks/examples/express && npm test
cd skills/replicate-webhooks/examples/nextjs && npm test
cd skills/replicate-webhooks/examples/fastapi && pytest test_webhook.py -v

Documentation Reference

• https://replicate.com/docs/topics/webhooks/setup-webhook
• https://replicate.com/docs/topics/webhooks/receive-webhook
• https://replicate.com/docs/topics/webhooks/verify-webhook

Made with Cursor