Show HN: Whyline – Git native decision history for coding agents (github.com)

Whyline has launched as an innovative tool aimed at enhancing the coding process by providing a clear decision history and context for code changes. Designed for use with AI coding agents like Claude Code, Codex, Grok, and Antigravity, Whyline creates a locally controlled workspace where users can track the reasoning behind every line of code. This continuity is significant as it helps developers understand not only what changes were made but also why they were necessary, thus fostering better collaborative coding practices. The tool captures ideas from various sources, integrates seamlessly with existing systems, and operates without requiring external accounts or telemetry, maintaining user privacy and control. Key technical features include the ability to explain specific lines of code by referencing the decisions and commits associated with them, as well as a multi-mode console that facilitates interaction between agents and supports traditional workflow structures with automation options through its Relay feature. Developers can also create reusable agents for specific tasks and manage project workflows more effectively. With a straightforward setup requiring Python 3.11, Git, and an authenticated CLI agent, Whyline aims to streamline the coding process while empowering teams with greater transparency and control over their development environment.