Finalist
Psyduck
Diffcast automatically converts code changes into demo videos that are easily understandable for non-technical teams.
Core trick
Gemini 3 reads each commit's git diff, drives the tool to record a walkthrough, and produces narrated multilingual demo videos.
Description
Diffcast automatically converts code changes into demo videos that are easily understandable for non-technical teams. When a commit occurs, our system utilizes Gemini 3 to analyze the git diff and identify what has changed. It then generates a walkthrough video and a feature release video with audio in multiple languages, all in under 2 minutes and without any manual effort.
Imagine an SDR new to an organization who finds it hard to understand a products' changelogs, DiffCast provides an easy way for them to understand the changelogs and the product changes.
README excerpt
# Diffcast ## Automated Feature Demos from Code Changes ## The Problem When developers ship new features, non-technical stakeholders are left in the dark. Product managers read commit messages they don't understand. Marketing teams wait days for demo videos. Customer success can't explain what changed. The result? Miscommunication, delayed launches, and features that go unnoticed. **The gap:** Code changes happen in seconds. Explaining them to humans takes hours. ## Our Solution Diffcast automatically transforms every merged PR into a narrated demo video — no human intervention required. When your team merges code, Diffcast: - Analyzes the git diff using Gemini 3 to understand what changed - Runs your tool and records the walkthrough of the new feature - Produces a demo video with voiceover and captions - Exports in multiple languages so global teams stay aligned - Delivers instantly to your team's dashboard **Result:** Your entire organization understands new features the moment they ship. ## Key Features - **AI-Powered Code Understanding** — Gemini 3.0 Flash analyzes git diffs to extract user-facing changes - **AI Agent Feature Walkthrough** — Automated recording and walkthrough of features using AI agents — no manual screen recording - **Automated Video Production** — AI-generated scenes, FFmpeg stitching, and Google Cloud TTS voiceovers - **Multi-Language Support** — One feature → videos in 10+ languages automatically - **Zero Manual Work** — GitHub webhook trig