# ALAA EDDINE ROUCADI

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [ALAA ROUCADI](https://cerebralvalley.ai/u/aerou)
- **GitHub:** https://github.com/aroucadi/replay_fix
- **Demo video:** https://www.youtube.com/watch?v=cPDIFQmVn9I
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3616

ReplayFix  is an autonomous, repository-agnostic, deterministic Rust harness for visual bug reproduction, causal verification, constrained AST repair, and cryptographic audit reporting for modern web applications.

Software developers lose over 30% of their sprints attempting to manually reproduce visual bugs from customer screen recordings that lack stack traces, DOM states, and reproduction steps. Conventional AI coding assistants fail at visual bugs because they cannot perceive screen resolutions, device pixel ratios (DPR), dynamic browser layouts, or interaction timelines.

ReplayFix solves this by accepting two inputs—a raw bug video recording (.mp4/webm) and access to the codebase—and autonomously driving a closed-loop Two-Gate verification lifecycle:
1. Multimodal Spatial Perception: Extracts video keyframes and click interactions, calibrating coordinates to target DOM elements.
2. Gate 1 (RED): Synthesizes a reproducible Playwright test and confirms it FAILS on the unpatched codebase (proving counterfactual causality).
3. Bounded AST Repair: Generates a surgical search-and-replace patch under strict repository isolation (Δrepo = 0 in an ephemeral scratch sandbox).
4. Gate 2 (GREEN): Certifies the fix through a 2-run stability pass and stress quorum.
5. Inoculation & Notary: Generates cross-browser test matrices (Chromium, Firefox, WebKit, Mobile) and anchors the causal trace into an RFC 6962 Merkle tree receipt signed with RFC 8032 Ed25519 for tamper-proof audit trails.

## More from Meta Global AI Developer Hackathon

- [Frontier pilots](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3613)
- [Skapter](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3614)
- [HOL](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3615)
- [Out of Context Marketing](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3617)
- [nufii](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3618)
- [MicroGeo Mapper](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3619)

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