Launch HN: Skillsync (YC W26) – AI chat sessions made portable across agents

Skillsync is a local-first tool that converts AI chat sessions between different coding agents, preserving messages, reasoning, and tool calls so users can continue work across providers. It stores sessions as human-readable markdown, indexes them for search, and lets teams share workspaces while keeping all data on the user’s machine. The core Rust engine, txcript, maps session formats like ffmpeg or pandoc, enabling seamless migration between agents such as Claude Code, Codex, and Cursor.