h5i is a Rust web framework built on Axum that brings formal verification with Lean 4 into everyday web development, alongside integrated red-teaming and CI/CD tools. It's designed for Rust developers and teams building AI-generated or security-critical applications. As AI makes coding faster, ensuring correctness becomes increasingly important. h5i helps developers prove critical properties and discover vulnerabilities that traditional testing alone might miss.

h5i is an open-source Git sidecar for AI-era development, achieving auditable sandbox, prompt-aware commits, 95% less token waste, 3.5x richer PR brief, 1.8x faster multi-agent real-time conversation. Git records what changed; h5i records the rest: the prompt, model, files read, reasoning, tests, audit signals, sandbox events, and agent-to-agent handoffs behind every change.

Meet h5i: The Git sidecar for the AI age. While Git tracks code diffs, h5i versions the AI’s "Reasoning" (Observe-Think-Act) alongside it. Unlike existing tools, h5i structures AI logic as a DAG linked to Git commits, allowing models to instantly restore context after session resets. It stands out with advanced compliance features like "Blind Edit" detection, uncertainty heatmaps, and prompt-injection scanning to ensure AI-generated code is traceable, safe, and reliable.