Skillsync arrived on Launch HN with a tidy complaint about the current agent stack: the work lives in chats, the chats live in incompatible formats, and switching tools means performing your own recent history from memory. The company describes itself on Y Combinator as "Notion for AI chats," founded in 2025 by Narayana Aaditya Ganeshkumar and Nishant Joshi, Winter 2026, team size two, San Francisco.

The sharper receipt is the public machinery. Skillsync says its open source Rust engine, txcript, translates sessions across Claude Code, Codex, Cursor, OpenCode, and more. The repository calls it "Pandoc for AI chats" and says the common model carries messages, reasoning, tool calls and results, images, metadata, and token usage, while warning that preservation depends on what the source records and the destination can represent. In other words, portability, but with caveats written in the margins where they belong.

The company site says the desktop product is local first and can pick up sessions already on a machine, while the YC launch post says skills and memory can be shared across teammates. That makes this less a model story than a file format story, which is often where the leverage hides. Frontier labs keep producing adjacent surfaces for coding agents. Startups are now racing to become the plumbing between them, lightly humming, somewhat indispensable.